Issue: 19250201

Sunday, February 1, 1925
FEBRUARY, 1925
2
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106
Friday, June 20, 2014

Articles
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Popular Science
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PopularScience_19250201_0106_002_0001.xml
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Radiola: Super-Heterodyne
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Radiola
Super-Heterodyne
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PopularScience_19250201_0106_002_0002.xml
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1
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THE CROSLEY RADIO CORPORATION
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THE CROSLEY RADIO CORPORATION
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PopularScience_19250201_0106_002_0003.xml
article
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PopularScience Monthly
Coming Next Month
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PopularScience_19250201_0106_002_0004.xml
tableOfContents
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In This Issue
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PopularScience_19250201_0106_002_0005.xml
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2
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Popular Science Publishing Co., Inc.
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Popular Science Publishing Co., Inc.
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PopularScience_19250201_0106_002_0006.xml
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3
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National Salesmen’s Training Association
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National Salesmen’s Training Association
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PopularScience_19250201_0106_002_0007.xml
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4
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NORTH AMERICAN INSTITUTE
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NORTH AMERICAN INSTITUTE
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PopularScience_19250201_0106_002_0008.xml
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5
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Chicago Engineering Works
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Chicago Engineering Works
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PopularScience_19250201_0106_002_0009.xml
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6
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Advertisements
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PopularScience_19250201_0106_002_0010.xml
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7
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COYNE Electrical School
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COYNE Electrical School
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PopularScience_19250201_0106_002_0011.xml
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8
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Chief Engineer Dunlap American School
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Chief Engineer Dunlap American School
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PopularScience_19250201_0106_002_0012.xml
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Advertisement
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PopularScience_19250201_0106_002_0013.xml
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10,12,14,16,18,20,22,24,26,28
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Money Making Opportunities for"Popular Science" Readers
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PopularScience_19250201_0106_002_0014.xml
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11
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Ralston University Press
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Ralston University Press
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PopularScience_19250201_0106_002_0015.xml
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12
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International Correspondence Schools Canadian, Limited
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International Correspondence Schools Canadian, Limited
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PopularScience_19250201_0106_002_0016.xml
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12
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Associated Drafting Engineers
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Associated Drafting Engineers
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PopularScience_19250201_0106_002_0017.xml
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13
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CHICAGO AUTO SHOPS
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CHICAGO AUTO SHOPS
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PopularScience_19250201_0106_002_0018.xml
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14
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COLUMBIA SCHOOL OF DRAFTING
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COLUMBIA SCHOOL OF DRAFTING
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PopularScience_19250201_0106_002_0019.xml
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Advertisement
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PopularScience_19250201_0106_002_0020.xml
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FRANKLIN INSTITUTE
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FRANKLIN INSTITUTE
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PopularScience_19250201_0106_002_0021.xml
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15
15
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The National Radio Institute
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The National Radio Institute
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PopularScience_19250201_0106_002_0022.xml
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16
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Advertisements
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PopularScience_19250201_0106_002_0023.xml
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17
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ALLIED MERKE INSTITUTES, Inc.
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ALLIED MERKE INSTITUTES, Inc.
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PopularScience_19250201_0106_002_0024.xml
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Advertisements
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PopularScience_19250201_0106_002_0025.xml
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19
19
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U. S. School of Music
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U. S. School of Music
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PopularScience_19250201_0106_002_0026.xml
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ARTHUR MURRAY
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ARTHUR MURRAY
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PopularScience_19250201_0106_002_0027.xml
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20
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S. & H. ENGINEERING CO.
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S. & H. ENGINEERING CO.
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PopularScience_19250201_0106_002_0028.xml
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21
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BUREAU OF INVENTIVE SCIENCE
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BUREAU OF INVENTIVE SCIENCE
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PopularScience_19250201_0106_002_0029.xml
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22
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HUTCH-OLENE COMPANY
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HUTCH-OLENE COMPANY
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PopularScience_19250201_0106_002_0030.xml
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22
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Advertisement
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PopularScience_19250201_0106_002_0031.xml
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22
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Michigan State Automobile School
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Michigan State Automobile School
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PopularScience_19250201_0106_002_0032.xml
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Advertisements
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SANTA FE WATCH COMPANY
DIAMONDS-WATCHES
SANTA FE WATCH COMPANY
Ladies' New Elite Wrist Watch
SANTA FE WATCH COMPANY
WEDDING RINGS
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PopularScience_19250201_0106_002_0033.xml
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23
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ROYAL SALES CO.
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ROYAL SALES CO.
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PopularScience_19250201_0106_002_0034.xml
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WEST-ANGUS SHOW CARD SERVICE LIMITED
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WEST-ANGUS SHOW CARD SERVICE LIMITED
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PopularScience_19250201_0106_002_0035.xml
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23
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AMERICAN SCHOOL OF AVIATION
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AMERICAN SCHOOL OF AVIATION
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PopularScience_19250201_0106_002_0036.xml
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Advertisements
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PopularScience_19250201_0106_002_0037.xml
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Hohner, Inc.: Hohner Harmonicas
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Hohner, Inc.
Hohner Harmonicas
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PopularScience_19250201_0106_002_0038.xml
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25
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MEYER BOTH COMPANY
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MEYER BOTH COMPANY
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PopularScience_19250201_0106_002_0039.xml
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ART and LIFE
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ART and LIFE
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PopularScience_19250201_0106_002_0040.xml
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25
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Chicago Technical College
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Chicago Technical College
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PopularScience_19250201_0106_002_0041.xml
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26
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Advertisements
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PopularScience_19250201_0106_002_0042.xml
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Advertisements
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PopularScience_19250201_0106_002_0043.xml
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Advertisements
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PopularScience_19250201_0106_002_0044.xml
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29,30,31
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Advertisements
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PopularScience_19250201_0106_002_0045.xml
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F. A. D. ANDREA, INC.
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F. A. D. ANDREA, INC.
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PopularScience_19250201_0106_002_0046.xml
article
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Radio-Frequency Transformers under Test
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Alexander Senauke
NO MATTER how well a set is built and how efficient the circuit employed, if the parts used in the set are not up to standard, satisfactory results cannot be expected. Just one deficient part is enough to lower the efficiency of a whole set and too much emphasis cannot be put on the necessity of employing high grade units throughout.
PopularScience_19250201_0106_002_0047.xml
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Popular Science Institute of Standards
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Popular Science Institute of Standards
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PopularScience_19250201_0106_002_0048.xml
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34
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A. H. GREBE & COMPANY, INC.: SYNCHROPHASE
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A. H. GREBE & COMPANY, INC.
SYNCHROPHASE
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PopularScience_19250201_0106_002_0049.xml
article
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35,36,147,148
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A Sailing Ship without Sails; New Wonder of the Seas
Huge spinning cylinders harness the wind—Inventor plans to take strange vessel across the ocean this year
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G. B. Seybold
FROM the wharves at Kiel, Germany, the schooner Buckau recently put out to sea, a ship without sails or steam. Like a ghost ship it moved mysteriously through the water with no apparent means of propulsion. The astounded spectators on shore knew that the boat was an old 2000-ton steel vessel and that previously 500 square yards of canvas had been needed to propel her.
PopularScience_19250201_0106_002_0050.xml
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37,38,39,149,150,152,154
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Henry Ford Says, "There Is Always Room for More"
A surprising solution of traffic congestion as depicted by the maker of more than 10,000,000 automobiles—What Ford thinks about the future of "flivver" airplanes—How he directs the world's most amazing industry without an office
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Raymond J. Brown
A SHORT time after Dr. Hugo Eckener had piloted the ZR-3 (Los Angeles) across the Atlantic, and had seen it stowed safely away in its hangar at Lakehurst, N. J., he visited the plants of the Ford Motor Company near Detroit, Mich. While he chatted with Henry Ford there, the conversation naturally enough veered around to aviation.
PopularScience_19250201_0106_002_0051.xml
article
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This Automatic Secretary Talks to Callers
Amazing New Office Machine Interviews Callers and Answers Phone Calls
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Truman Stevens
A RECENTLY invented machine performs in a way that is positively uncanny a variety of tasks ordinarily accomplished only by human hands and brains. It will take dictation like a stenographer. It will serve as secretary of a meeting or office conference.
PopularScience_19250201_0106_002_0052.xml
article
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WHY I READ POPULAR SCIENCE MONTHLY
A Prize Contest Announcement
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UNTIL I found POPULAR SCIENCE MONTHLY, I rarely knew what to do with my evenings,” a reader recently wrote. “I was just plain bored. “But now, with a pipe, a pair of slippers, and POPULAR SCIENCE, I have 30 evenings of freedom from monotony at my command every month.
PopularScience_19250201_0106_002_0053.xml
article
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Sky Superdreadnaught to Guard England
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WHILE America’s new sky leviathans, the Los Angeles and the Shenandoah, have been amazing the world with their successful performances, England has been testing out its first winged superdreadnaught of the air—a deadly new coast-defense aircraft, said to be the largest single-engined airplane in the world.
PopularScience_19250201_0106_002_0054.xml
article
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42,43
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Radio Photos Cross the Sea
The news in pictures is flashed over thousands of miles by the latest marvel of wirelss communication
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Robert E. Martin
"RADIO transmission is too slow," remarked Owen D. Young, chairman of the board of directors of the Radio Corporation of America and the General Electric Company about a year ago. “I am tired of this dot-and-dash business. I want to see the time come when an operator will press a key and—zip! the first page of the London Times will be reproduced in New York.”
PopularScience_19250201_0106_002_0055.xml
article
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44
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The Sinking of a $30,000,000 Dreadnaught
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IN THESE spectacular photographs of the recent sinking of Uncle Sam’s $30,000,000 dreadnaught Washington off Cape Hatteras, after a terrific four-day bombardment by air and by sea, we have a vivid picture of a war that knows no truce: the never-ceasing rivalry between offensive weapon and defensive structure.
PopularScience_19250201_0106_002_0056.xml
article
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45,158
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How Fast Can YOU Think?
An expert tells how to score your mental ability by useful and fascinating tests that you can try on yourself
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Donald A. Laird
JUST how bright are you? I don’t mean, “How much do you know?”— because there is a difference. A filled fountain pen contains more liquid than an empty hogshead, but its capacity is not the same. How is your capacity for knowledge—your native intelligence that you have inherited from your parents, as opposed to the store of facts that your brain contains as a result of your schooling, your work, your reading, and your association with your fellows?
PopularScience_19250201_0106_002_0057.xml
article
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46,47
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Sunken Riches Lure Modern Adventurers
Amazing New Deep-Sea Armor Revives Romantic Treasure Hunt in Wrecked Ships
May Recover Lusitania’s Wealth
A work Chamber on the Ocean Floor
Mechanical Claws Grapple for a Fortune
How Divers Salvaged $30,000,000 from Laurentic
Washing Gold from the Ocean’s Sand
A Mechanical Sea Monster
Remains under Sea Four Hours
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Will the all-metal armor shown above enable divers to recover the $5,000,000 that went down with the Lusitania, and now lies in 285 feet of water? The inventor is confident of working 1000 feet undersea. Notice how the diver is lowered by a crane Never before has the glamour of adventure in searching the seas for sunken treasure so appealed to men’s imagination as it does today; for recent submarine inventions are making it possible to descend hundreds of feet beyond what heretofore has been the limit of human endurance.
PopularScience_19250201_0106_002_0058.xml
article
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48
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A Thrilling Spill on the Speedway
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THESE six photographs are reproduced from what is probably the most remarkable motion picture of an automobile racing accident taken. They show a racing car turning a complete somersault on the track catapulting the driver high into the air; then, as he falls to earth again, rolling over upon him to crush out his life.
PopularScience_19250201_0106_002_0059.xml
article
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49,50
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Automatic Controls to Make Our Trains Safer
How Machinery Prevents Collisions when Human Hands Fail
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Norman C. McLoud
IN THE vestibule of a limited train recently I saw the conductor, startled into sudden action, throw open the outside door and look backward. With his first move he pulled the overhead emergency cord. The swiftly speeding train jerked to a standstill in a manner that must have surprised the engineer as much as it jolted all the passengers.
PopularScience_19250201_0106_002_0060.xml
article
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Artificial Throat Returns Speech to Cancer Sufferers
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TWO men stood on a platform in Baltimore, Md., recently before a gathering of surgeons. Neither had spoken in several years, their vocal cords having been removed in operations for cancer of the throat. They attempted to speak, but the results were only slight hisses from their lips and louder sibilant sounds as the air from their lungs sighed through the apertures in their throats left by the surgeons’ knives.
PopularScience_19250201_0106_002_0061.xml
article
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51
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Newest Locomotive Marvels
Giants of Electricity and Steam to Pull Our Trains
New Turbine Locomotive
Gearless Giant
Run by Storage Batteries
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LESS than a century ago the grotesque woodburning locomotives that hauled American trains did well if they could take a short train along a straight stretch of level track at 25 miles an hour. In less than a century these crude engines have been developed into the giants of electricity and steam that today carry us across the continent in less than five days and pull tremendous loads over mountain ranges.
PopularScience_19250201_0106_002_0062.xml
article
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52,53,155
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Speedy Airplanes to Conquer Perils of U. S. Postal Trails
Thrilling Stories of Mail Routes that Have Cost the Lives of Many of Uncle Sam’s Hardy Carriers
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WHEN the United States mail-carrier put on the uniform of an aviator, from all over the country came warnings of disaster. Airplanes sweeping through the black of night, struggling against wild storms, pilots guided only by feeble lights flickering upward at long intervals, deserts and mountains to be crossed, with help difficult to procure in case of accident—all introduced an element of peril into what should be surrounded with utmost safety—the delivery of our daily letters.
PopularScience_19250201_0106_002_0063.xml
article
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54,156
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First Aid for Your Family
What you should keep in your medicine cabinet for every emergency—How to safeguard against mistakes
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John F. Anderson
WHEN you open the door of your medicine cabinet,what do you see on its narrow shelves? Do you see articles that should be there for every possible emergency, and of which your family physician would approve; or do you see articles he would not approve, and many of which may be dangerous or at least unsafe?
PopularScience_19250201_0106_002_0064.xml
article
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55
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Gay Deceivers among the Insects
Nature’s Clever Camouflage Protects Them from Enemies
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THE world’s foremost artisan in camouflage is Nature herself. To protect her creations she has endowed them with amazing tricks of deception. There are plants that entice unsuspecting insects to destruction by alluring flowers and imitation drops of honey.
PopularScience_19250201_0106_002_0065.xml
article
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56,57
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Crash of Electrons Heard
How invisible bombardments by the smallest particles of matter are magnified a million times—Seconds split into a billion parts— A promising treatment of tuberculosis—Other important new mileposts in the march of science
A New Weapon
Other Universes like Ours
Smallest Time Measurement
A Radio Compass for Flyers
Drops of Electric Fire
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EXCEEDINGLY faint sounds often are compared with the drop of a pin. Can you imagine, though, listening to sounds beside which the impact of a pin on a soft rug would be like a clap of thunder? Two American scientists did just that recently, when they devised an apparatus by which they were able to hear electrons, which, as you know, are the smallest known particles of matter-infinitesimal charges of electricity so tiny that their exact size could scarcely be computed if we were able to divide a millionth of an inch into a million parts.
PopularScience_19250201_0106_002_0066.xml
article
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58,59
Better Tools and New Labor-Saving Methods
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Six Handy End Wrenches Assembled on Ring
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A SET of six very serviceable end wrenches assembled on one ring forms a useful tool for work about the house or in the garage. The smallest fits hexagonal or square nuts measuring five-sixteenth inch; the largest is for five-eighth-inch nuts, while the other wrenches fit nuts of one-eighth-inch gradations between these two measurements.
PopularScience_19250201_0106_002_0067.xml
article
58
58
Better Tools and New Labor-Saving Methods
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A Portable Soldering Outfit for Linemen
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THIS portable, compact soldering outfit is said to enable telephone linemen to accomplish more work in a day and do it with more safety than by the older methods. While climbing a pole, the lineman carries a tank of acetylene gas, a soldering iron, and torch attachments, all strapped to his back and out of his way.
PopularScience_19250201_0106_002_0068.xml
article
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58
Better Tools and New Labor-Saving Methods
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Average Life Is 56 Years
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THE average length of life in the United States now is 56 years, an increase of 15 years since 1870, according to a recent report of the U. S. Public Health Service. In the sixteenth century human life averaged only between 18 and 20 years.
PopularScience_19250201_0106_002_0069.xml
article
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58
Better Tools and New Labor-Saving Methods
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Automatic Signal Replaces Traffic Cop
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BLOOMFIELD, N. J., is cutting down its police force by installing electrical automatic traffic signals. The “stop” and "go" signs revolve at regular intervals, which can be shortened or lengthened to meet the requirements of any particular crossing.
PopularScience_19250201_0106_002_0070.xml
article
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58
Better Tools and New Labor-Saving Methods
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Coastguardsmen Rescued 2462 Persons in Year
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THE army of thousands of men of the U. S. Coastguard Service, who patrol our 13,000 miles of coastline as methodically as a ship’s deck, constitute the most complete life-saving organization in the world. During the 12 months ending last July 1 men from coastguard boats and stations rescued 2462 persons from positions of peril.
PopularScience_19250201_0106_002_0071.xml
article
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58
Better Tools and New Labor-Saving Methods
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Newest Rope Fire Escape Has Safety Control
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HERE is a new safety fire-escape device, consisting of a rope fitted with combination slide and clamping castings. In case of fire, the person trapped in a burning building uncoils the escape rope, and slides the casting along the rope so that it rests just below the window-sill.
PopularScience_19250201_0106_002_0072.xml
article
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59
Better Tools and New Labor-Saving Methods
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Fighting Perilous Mine Dust with Cannon
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SHOOTING at dust with a cannon is a new and strange method by which the Federal Bureau of Mines expects to reduce the annual appalling death toll in mines caused by the many coal-dust explosions. The dust cannon is mounted on a mine car and moved quickly to any part of a mine where danger is believed to be imminent.
PopularScience_19250201_0106_002_0073.xml
article
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59
Better Tools and New Labor-Saving Methods
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A Simple and Easy Way to Mend Shaky Chairs
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FIRST aid to shaky furniture comes in the form of small pen-shaped metal pieces that fix loose chair parts permanently and without nails or glue.The metal piece is inserted in the rung or loose arm piece, and driven in as shown in the illustration.
PopularScience_19250201_0106_002_0074.xml
article
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59
Better Tools and New Labor-Saving Methods
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Cheer for the Low-Brows
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IF YOU have a low brow, it is no sign that you are less intelligent than a person with a high brow, according to Dr. Ales Hrdlicka, curator of physical anthropology at the National Museum, Washington, D. C.
PopularScience_19250201_0106_002_0075.xml
article
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59
Better Tools and New Labor-Saving Methods
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A Sanitary Earpiece
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THE principle of the sanitary paper drinking cup has been applied to the telephone receiver by José A. Dominguez of Mayaguez, Porto Rico. The device, a sanitary ear protector for radio as well as telephone receivers, is cup-shaped, of strong paraffined paper crimped and pressed so that it will fit easily over the end of the receiver and stay in place without further attention.
PopularScience_19250201_0106_002_0076.xml
article
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Better Tools and New Labor-Saving Methods
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New Office Desk Built on Sectional Plan
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BUILDING your own desk to fit your own particular needs has been made possible by the recent invention of a sectional desk designed on much the same principle as the sectional bookcase. The units are manufactured in standardized dimensions so that filing cabinets and drawers of specified sizes can be installed as desired.
PopularScience_19250201_0106_002_0077.xml
article
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60,61
Novel Appliances for Every-Day Use
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New Split Cane Rod for Deep-Sea Fishing
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EIGHTEEN months are required to construct the newest type of deep-sea fishing-rod, designed by an English manufacturer especially for landing big game fish. It is known as a "split cane rod,” and is equipped with an enormous brake reel fitted with a brake band not unlike that of an automobile.
PopularScience_19250201_0106_002_0078.xml
article
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60
Novel Appliances for Every-Day Use
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An Adjustable Desk Chair
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AN OFFICE chair with adjustable back rest and narrow seat has been designed recently to enable desk workers to sit with correct posture and less fatigue. The chair automatically swivels to fit into the hollow of the back where support is needed.
PopularScience_19250201_0106_002_0079.xml
article
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Novel Appliances for Every-Day Use
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Revolving Lamp-Shade Tells the Timeߞ
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SOME can tell time during the day by looking at the sun. Now, by means of a curious new invention, any one can tell time at night by looking at a lamp. It is a special sort of table lamp, with a shade that is turned by clock works contained in the base of the lamp.
PopularScience_19250201_0106_002_0080.xml
article
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Novel Appliances for Every-Day Use
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Complete Kitchenette in a Small Cabinet
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AN ENTIRE kitchenette in what appears to be a refrigerator is a new convenience for those who happen to live in one or two rooms, but cling to their liking for home cooking. A table providing room for three persons can be attached to one side of the cabinet, so that a meal can be served easily.
PopularScience_19250201_0106_002_0081.xml
article
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Novel Appliances for Every-Day Use
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Self-Standing Golf Bag Replaces Caddy
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TO ELIMINATE the bother of constantly picking up a golf bag after the completion of each stroke, when the caddy is not on duty, Robert L. Fargo, of Chicago, Ill., has invented a self-standing golf bag. Two legs attached to the top of the bag are so arranged that they will swing out into place when the bag is tipped.
PopularScience_19250201_0106_002_0082.xml
article
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61
Novel Appliances for Every-Day Use
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"Help Yourself" Service for Soft Drinks
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OBSERVING the general popularity of "wait-on-yourself" devices in use in the larger cities, a New York inventor has produced a container for iced bottled soft drinks, from which the customer can choose for himself his favorite brand. He opens a lid at the top of the beverage dispenser then turns a handle, which revolves a tray inside, until the desired bottle is reached.
PopularScience_19250201_0106_002_0083.xml
article
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61
Novel Appliances for Every-Day Use
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New Needle-Guiding Button
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A NEEDLE-FINDING button is a recent invention designed to make sewing on buttons less tiresome. The new button is said to save the worker's time by encouraging the needle to slide easily into the thread holes. The under side of the button is molded in such a way that widemouthed channels guide the needle toward the holes.
PopularScience_19250201_0106_002_0084.xml
article
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Novel Appliances for Every-Day Use
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A Compact Electric Motor for the Phonograph
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THIS new electric phonograph motor recently perfected is said to be the first of its kind that runs without belt, gear, or friction disk reduction. It has a direct drive and will run at a constant speed at the low rate of 40 revolutions a minute.
PopularScience_19250201_0106_002_0085.xml
article
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Novel Appliances for Every-Day Use
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An Auto-Cleaning Sponge that Stays Wet
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A RUBBER sponge, kept wet by running water, is a new time-saving invention for cleaning an automobile. A rubber tubing is fastened to the sponge through a hollow handle and the other end of the tubing is attached to a faucet or garden hose.
PopularScience_19250201_0106_002_0086.xml
article
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Oddities Picked up by the Camera Man
Ukelele in Cane—Lifeboat on Wheels— Left-Handed Watch—Fireplace of Jewels
Cane-Ukelele
Ship Knees from Giant Roots
Old Railway Caboose a Monument
Lifeboat on Wheels Launches Itself
Colonial Hammer
Operating on a Horse
A Fireplace Studded with Gems
Runs Backward
A Stack of Horseshoes
China Has a Bridge of Porcelain
“Science” in Sculpture
Cattle Cleaner
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A walking-stick that can be converted instantly into a ukelele is the work of Morris Rothman, of Bayonne, N. J., shown with his invention at and below One of the oldest of crafts is that of digging ship knees—the wooden supports formed from giant roots, that are used in constructing the stem and stern of a wooden ship.
PopularScience_19250201_0106_002_0087.xml
article
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64,65
Ten Ingenious New Products of Mechanics
Unusual Machines and Engines Built to Increase Our Every-Day Efficiency
Track-Laying Machine Aids in Railroad Building
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THE size of railway gangs is said to be greatly reduced in southern Florida, where a contractor is employing a new construction outfit consisting of a locomotive and two flat cars loaded with ties, rails and a gas-driven traveling crane.
PopularScience_19250201_0106_002_0088.xml
article
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Ten Ingenious New Products of Mechanics
Unusual Machines and Engines Built to Increase Our Every-Day Efficiency
Electric Milk Truck Has Automatic Brakes
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THE driver of this ingenious new electric milk wagon is his own self-starter and brake. He stands on the running-board as he drives from house to house along his route. As soon as he jumps off, freeing the platform of his weight, hydraulic brakes are applied automatically to the car.
PopularScience_19250201_0106_002_0089.xml
article
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Ten Ingenious New Products of Mechanics
Unusual Machines and Engines Built to Increase Our Every-Day Efficiency
Milwaukee Railroad Plans to Electrify System
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PLANS for electrifying the entire system of the Chicago, Milwaukee & St. Paul Railway, operating lines throughout the West, are being formulated by officials of the road, according to recent reports. The Milwaukee already operates 660 miles of electrified road over the Cascades and Rocky Mountains.
PopularScience_19250201_0106_002_0090.xml
article
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Ten Ingenious New Products of Mechanics
Unusual Machines and Engines Built to Increase Our Every-Day Efficiency
Diesel Engine Runs Electric Locomotive
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DUE to the necessity for coal conservation, European engineers have been striving for an efficient locomotive that would be run by other means than steam. Here is shown one of the newest designs, a Diesel electric locomotive built in Germany for negotiating more quickly and economically the vast stretches of territory on the Russian steppes.
PopularScience_19250201_0106_002_0091.xml
article
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Ten Ingenious New Products of Mechanics
Unusual Machines and Engines Built to Increase Our Every-Day Efficiency
New Type of Lightship for New York Harbor
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THE last word in lightships is the Five - Fathom Light, designed for duty off New york Harbor. Two mast lights will flash each night and powerful radio equipment will assist in protection of the great harbor's shipping. This latest of Uncle Sam's coastal safeguards has a gross tonnage of 825, is 146 feet long, and has oilburning engines.
PopularScience_19250201_0106_002_0092.xml
article
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Ten Ingenious New Products of Mechanics
Unusual Machines and Engines Built to Increase Our Every-Day Efficiency
Electricity Replaces Steam in Road Roller
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WHEN a steam roller belonging to an electric railway and light company in Milwaukee, Wis., needed extensive repairs, it was suggested that it be remodeld to use current from trolley circuits operated by the firm. The electric motor was mounted so that it drives the pinion formerly driven by the steam engine, and the electric roller is operating very successfully on streets where the car lines supply power.
PopularScience_19250201_0106_002_0093.xml
article
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Ten Ingenious New Products of Mechanics
Unusual Machines and Engines Built to Increase Our Every-Day Efficiency
Twin Motors Drive Streamlined Hydroplane
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THIS strange craft, shown lying at anchor on the Danube River, is a giant hydroplane of unusual design recently built in Vienna, Austria, for W. D. McDaniel, an American. It is run by two giant six cylinder motors driving four-bladed propellers.
PopularScience_19250201_0106_002_0094.xml
article
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Ten Ingenious New Products of Mechanics
Unusual Machines and Engines Built to Increase Our Every-Day Efficiency
Safety Stop Sets Engine's Brakes Automatically
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THE automatic train stop pictured a above, designed to prevent collisions, is the recent invention of British railway engineers. A projecting arm from a device at the side of the track strikes a prop held between two metal arms projecting from the locomotive.
PopularScience_19250201_0106_002_0095.xml
article
65
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Ten Ingenious New Products of Mechanics
Unusual Machines and Engines Built to Increase Our Every-Day Efficiency
Huge Transformers Built to Test Insulators
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THESE three huge step-up transformers, capable of producing electrical tensions of more than a million volts, are part of the equipment of an enormous new allmetal electrical laboratory recently completed by the Compagnie Générale d'Electro Céramique at Ivry France.
PopularScience_19250201_0106_002_0096.xml
article
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Ten Ingenious New Products of Mechanics
Unusual Machines and Engines Built to Increase Our Every-Day Efficiency
Pumps Pour Lake Water into Dry River-Bed
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IN WESTERN Nevada, engineers, by means of five gigantic pumps, recently supplied a dry river-bed with water, thus providing for the irrigation of 12,000 acres of land and saving crops valude at more than $200,000. The pumps were installed when the level of scenic Lake Tahoe sank so low that the natural overflow of water into the Truckee River stopped entirey.
PopularScience_19250201_0106_002_0097.xml
article
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65
Ten Ingenious New Products of Mechanics
Unusual Machines and Engines Built to Increase Our Every-Day Efficiency
Odd Railway Car Propelled by Motorcycle
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A NOVEL railroad inspection car propelled by a motorcycle was constructed recently in India. When the motorcycle, fitted with an eight-horsepower engine, is required for use off the trucks, it can be datached from the truck in a few minutes.
PopularScience_19250201_0106_002_0098.xml
article
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Ten Ingenious New Products of Mechanics
Unusual Machines and Engines Built to Increase Our Every-Day Efficiency
May Revolutionize Motors
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A GAS turbine engine that, it is claimed, may revolutionize automobile and airplane motors is being perfected by a French engineer. It is said to combine the advantages of the explosive gas motor and the steam turbine. Recent tests before officer of the French Air Service, are reported to have given complete satisfaction, the engine turning smoothly at the rate of 1500 revolutions a minute.
PopularScience_19250201_0106_002_0099.xml
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“John,” a 150-Pound Dummy, Tests Air-Mail Parachutes
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UNDER the fuselage of the airplane shown in the above photograph hangs “John,” a 150-pound dummy, who has made more parachute drops than any other member of the government flying personnel. The man-sized dummy is used to test thoroughly scores of parachutes recently purchased for air-mail pilots who must fly often in extremely adverse weather conditions.
PopularScience_19250201_0106_002_0100.xml
article
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Smallest Airplane Weighs Only 221 Pounds
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HERE is what experts have described as the smallest practical airplane in the world. It is known, as the "Hummer" and was flown at a recent air meet recently at Dayton, Ohio, by its builder, Bert Mix, an airplane mechanic. The “Hummer” weighs only 221 pounds.
PopularScience_19250201_0106_002_0101.xml
article
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Homemade Metal Monoplane with Folding Wings Fits in Garage
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A HOMEMADE all-metal monoplane of duralumin, built in a back yard with comparatively crude tools, can be folded to fit in a garage. The designer, W. H. A. Boyd, of Baltimore, Md., did not know how to fly, nor did his father, W. B. Boyd, nor brother, C. M. Boyd, who helped him build it.
PopularScience_19250201_0106_002_0102.xml
article
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Powerful Portable Searchlights Guide Air-Mail Fliers
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TO AID United States air-mail pilots in making night landings, new portable searchlights recently have been installed at Crissy Field, San Francisco. On clear nights, it is said that pilots can see the piercing rays of these 450-million-candlepower lights when they are from 100 to 150 miles distant.
PopularScience_19250201_0106_002_0103.xml
article
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Air Freighter Carries a 2700-Pound Cargo
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AERIAL freighting appears definitely outgrown the possibility stage. This sky cargoship runs regularly between London and Paris, transporting perishable products and goods to fill special orders. It carries a cargo of 2700 pounds, or nearly 1 ½ tons.
PopularScience_19250201_0106_002_0104.xml
article
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British Government Orders Two Giant Airships
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FOLLOWING a recent decision to redevelop airship transportation in England, the British government has just ordered the first of two giant dirigibles, each of 5,000,000 cubic feet capacity, for transportation of passengers and freight.
PopularScience_19250201_0106_002_0105.xml
article
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Aviator Builds Baby Monoplane and Flies to Height of 1800 Feet
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A REMARKABLE new type of small, baby monoplane was completed recently by Edward F. Allen, a test pilot of Washington, D. C., who recently attained in it a height of 1800 feet. Experts believe that one of the next important steps in aviation will be a small, inexpensive plane that can be kept in a garage, and-flown from a yard.
PopularScience_19250201_0106_002_0106.xml
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A Dozen and One New Ideas for Busy Offices
Ingenious Inventions and Automatic Machines Designed to Save Valuable Time and Labor
Seals Letters Automatically
Opens Cartons in Three Strokes
Typewriter-Punch
Pencil Clip Is Knife
Ten Stamps in One
Phone Lock
Pencil Calculator
Motor-Driven Eraser
A Convenient Locker
A Compact Posting Desk
Pocket Check Protector
Handy Eraser in Pencil Form
For Adding Fractions
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Driven by electricity, this machine stamps and seals letters. The letters are fed in at the left and deposited in the receiving rack Three motions with new carton cutter open fiber or corrugated pasteboard boxes quickly. A sharp cutting blade projecting from the tool is so shaped that it readily adjusts itself to the edge of the box By means of electrical connections from the numeral keys of a typewriter to a power punch, the machine at the left enables a typist to punch tabulating cards, thus dispensing with an extra operator for the punch ,~ little pocket device that will be found convenient for many office uses serves as a clip to hold the pencil in the pocket, and as a keen two edged knife for sharp ening pencils, cutting string, or erasing ink.
PopularScience_19250201_0106_002_0107.xml
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Automobile Ferries Relieve Traffic Jam on Hudson
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UNTIL the vehicular tunnel now under construction under the Hudson River is completed, all automobiles passing between New York and New Jersey have to be carried across the river on ferries. On some days, especially holidays, the line of cars waiting for transportation on the New Jersey side is more than a mile long.
PopularScience_19250201_0106_002_0108.xml
article
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Wood Model of Locomotive in Banquet Hall
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TO PROVIDE appropriate decoration for a banquet of railroad officials in the Chateau Frontenac at Quebec Canada, recently a full size wooden model of a fast passenger locomotive was constructed and set up in banquet room. The model represented the locomotive as emerging from the Connaught Tunnel, one of the greatest engineering undertakings on the North American continent.
PopularScience_19250201_0106_002_0109.xml
article
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Your Questions Answered
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AS A special service to readers, the Information Department of POPULAR SCIENCE MONTHLY will answer all reasonable questions on general science, mechanics, and radio. Write your questions as briefly as possible and inclose a self-addressed stamped envelope.
PopularScience_19250201_0106_002_0110.xml
article
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Steel Bridge Collapses in Tornado’s Path
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WE MAY boast that we have conquered nature, but when a natural force actually demonstrates its power, we often have to admit ourselves beaten. Near Withee, Wis., engineers constructed a footbridge across a river. Made of steel to withstand fire, the force of the current, and the wear of traffic, it should have lasted for centuries.
PopularScience_19250201_0106_002_0111.xml
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Schoolhouse Moved Seven Miles by Water
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TAKING a schoolhouse off dry land, floating it through canal locks, and towing it seven miles across Puget Sound to a new location on an island, was the unusual feat accomplished recently by a Seattle firm of contractors. The schoolhouse originally was situated on the shores of Lake Washington, adjoining Seattle.
PopularScience_19250201_0106_002_0112.xml
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Mammoth New Defense Gun in Public Demonstration
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THE size of this mammoth coast defense gun could not fail to impress the crowds that gathered to watch its demonstration a short time ago at the Army Proving Ground, Aberdeen, Md. The bore of the gun, which is seen plainly in the photograph, is 14 inches, one of the largest in use in America.
PopularScience_19250201_0106_002_0113.xml
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Wisconsin Youth Drives the Smallest Sedan
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A SMALL boy in Milwaukee, Wis., drives what is said to be the smallest passenger-carrying sedan ever seen on the streets. There is more difference between his car and the Ford coupé beside it than there is between a Ford and a Rolls-Royce.
PopularScience_19250201_0106_002_0114.xml
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America’s Most Active Volcano in Eruption
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THIS most recent photograph of Mt. Popocatepetl shows the most active volcanic peak in the North American continent in action. The Aztec name of this strange peak of snow and fire means literally, Smoke Mountain. Located near Puébla, in Mexico, it is sometimes called by tourists who cannot remember the spelling of the real name, the “Puebla volcano.” It is the second highest summit in Mexico, rising to a height of nearly 18,000 feet, about 4000 feet higher than Pike’s Peak in Colorado.
PopularScience_19250201_0106_002_0115.xml
article
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The Loftiest Point Ever Photographed on Earth
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THIS photograph of the summit of invincible Mount Everest was snapped with a small hand camera at an altitude of 28,000 feet, the highest point on earth at which a picture ever has been taken. It was made during the ill-fated attempt last year to scale the summit of the world’s highest peak.
PopularScience_19250201_0106_002_0116.xml
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The Wilson Dam at Muscle Shoals —A Future “Niagara of the South”
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THIS magnificent new photograph of the Wilson Dam at Muscle Shoals shows the full breadth of the immense project by which the world’s greatest power dam will create the "Niagara of of the South." The dam is nearly a mile long and 102 feet high, and when completed will harness the Tennessee River to supply turbines capable of generating 600,000 horsepower.
PopularScience_19250201_0106_002_0117.xml
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Harnessing the Small Streams for Power
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RAPID strides are being made toward successfully utilizing the power that may be derived from small streams. Two of the newest machines designed for this purpose are shown in these pictures. The device in the upper illustration may be operated from nothing larger than a spillway.
PopularScience_19250201_0106_002_0118.xml
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A Perilous Job—Painting the Brooklyn Bridge
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GIVING Brooklyn Bridge its annual coat of paint is a job full of peril for the men who must cling like spiders to the giant steel web. As long as the great bridge stretches across the East River, connecting the Island of Manhattan with Brooklyn, painters will have to risk their lives once a year to prevent the cables from rusting.
PopularScience_19250201_0106_002_0119.xml
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What Do You Want to Know?
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POPULAR SCIENCE MONTHLY will be glad to answer questions from readers on subjects of general science, mechanics and radio. Address your questions to the Information Department, POPULAR SCIENCE MONTHLY, 250 Fourth Avenue, New York City, inclosing a self-addressed stamped envelope.
PopularScience_19250201_0106_002_0120.xml
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How Everest Climbers Bridged Treacherous Chasms
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AT THE highest altitudes ever reached on earth, members of the recent Mount Everest Expedition crept across crevasses of inconceivable depth on the rungs of a portable ladder. Of the many unusual bridges in the world there is probably none possessing strength as great for its weight as the remarkable ladder bridge carried by those daring explorers.
PopularScience_19250201_0106_002_0121.xml
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What Inventors Are Adding to the Motorists' Enjoyment
Many New and Useful Accessories Are Designed to Save Labor and Make Your Car More Efficient and Convenient
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A new tire gage of the dial type, resembling a watch, has a curved neck that permits easy access to the valve stem on all types of wheels. The crystal of this new pressure gage is non-breakable A combination anti-glare shield and rear-view mirror, attached above the windshield is of semitransparent material.
PopularScience_19250201_0106_002_0122.xml
article
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How Frozen Eggs Are Canned for the Market
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MORE than fifty million pounds of canned frozen eggs are used annually in the United States by restaurants, hotels, and in home cooking. They cost from three to five cents a pound less than unshelled eggs and are more easily handled. The first process in egg canning is chilling the eggs in a room at a temperature of 31° F. for from 12 to 24 hours.
PopularScience_19250201_0106_002_0123.xml
article
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Ship’s Blocks Are Tested in Forest Laboratory
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THE Forest Products Laboratory at Madison, Wis., has begun a series of tests to determine the strength of keel blocks used to support the hulls of ships while in drydock. When these keel blocks fail, the hull drops with the shattered timbers and is damaged, usually very seriously, so that the importance of the keel blocks is easily seen.
PopularScience_19250201_0106_002_0124.xml
article
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Study of Fossils Reveals Oil Deposits
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REMAINS of tiny shellfish and other fossils believed to be from five million to twenty million years old, are being used to assist locating fields of buried minerals and oils. Experts studying areas of ground, looking for traces of oil, collect these tiny fossils, some of which are so small that they must be picked up with camel’s-hair brushes, and send them to the laboratories of the U. S. Geological Survey in Washington for classification.
PopularScience_19250201_0106_002_0125.xml
article
76
76
[no value]
[no value]
Astronomy now Taught by Mechanical Model
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[no value]
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[no value]
WHY can we see only one side of the moon? What causes eclipses of the moon and sun? When will there be another eclipse of the sun? What causes the seasons? Questions like these can be answered readily and with extraordinary clearness by means of a fascinating model of the sun, moon and earth completed recently in England for use in schools and colleges.
PopularScience_19250201_0106_002_0126.xml
article
77
77
[no value]
[no value]
Watchmakers Must Pass Rigid Examinations
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[no value]
[no value]
[no value]
TO MAKE sure that all jewelers displaying watchmaker's signs in their shops are really experts in their trade, the U. S. Horological Institute conducts examinations of all applicants before issuing licenses by carefully examining samples sent in as a preliminary test of skill on the part of the applicant.
PopularScience_19250201_0106_002_0127.xml
article
77
77
[no value]
[no value]
Blended Motor Fuels Are Put to the Test
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[no value]
[no value]
[no value]
SO MANY blended fuels are on the market now that the average motorist is puzzled as to which to choose. Nearly every time he drives up to a new filling station, a new mixture is recommended to him and he has no way of telling which ones are good and which ones poor.
PopularScience_19250201_0106_002_0128.xml
article
77
77
[no value]
[no value]
Seeks New Cures by Means of Radio Waves
[no value]
[no value]
[no value]
[no value]
IN HIS laboratory at Alpine, N .J., Dr. J. Clawson Burnett has been perfecting the oscilloclast, an instrument designed to heal human diseases by means of electromagnetic waves. After experimenting for two years with the machine, the invention of the late Dr. Albert Abrams of California, which raised a storm of criticism, Doctor Burnett says he is now ready to place his results before scientific societies for examination.
PopularScience_19250201_0106_002_0129.xml
article
77
77
[no value]
[no value]
Electrical Machine Records Heart Energy
[no value]
[no value]
[no value]
[no value]
BASED on the theory that the human heart generates small electric currents, a new machine for recording heart action was tested recently at the Ellis Hospital in Schenectady, N. Y. The instrument measures the difference in voltage between various parts of the body, and is actuated by energy that comes from the patient in the form of tiny electric impulses.
PopularScience_19250201_0106_002_0130.xml
article
78
78
[no value]
[no value]
Artificial Heat Now Dries Hay Crops
[no value]
[no value]
[no value]
[no value]
"MAKE hay while the sun shines," urges the old proveb. But what shall the unluckey farmer do if the capricious sun refues to lend its assistance during the haying season? Thousands of acres of crops are lost every year on account of rainy weather at the critical period.
PopularScience_19250201_0106_002_0131.xml
article
78
78
[no value]
[no value]
A Portable Power Hammer for Light Work
[no value]
[no value]
[no value]
[no value]
FOR lighter grades of work, such as sewer jobs and small trenches where light timber or steel sheeting is employed, the big automatic hammer is practically useless. For these jobs a new hammer much reduced in size is convenient and economical.
PopularScience_19250201_0106_002_0132.xml
article
78
78
[no value]
[no value]
To Produce More Helium
[no value]
[no value]
[no value]
[no value]
THE U.S. Navy Department soon will begin developing additional supplies of helium gas for airships, it is announced. At the present rate, of helium production in the United States,it would require four months to obtain enough of the gas to fill the bag of the dirigible Los Angeles, formerly the ZR-3.
PopularScience_19250201_0106_002_0133.xml
article
78
78
[no value]
[no value]
Mechanical Cabinetmaker Combines Five Machines
[no value]
[no value]
[no value]
[no value]
FIVE complete woodworking machines with all adjustments are combined in this unusually compact mechanical cabinetmaker. It includes a sawtable, jointer, thickness planer, boring table, and speed spindle. In the photograph above three operations are shown—ripping, thickness planing, and hollow-ohisel mortising.
PopularScience_19250201_0106_002_0134.xml
article
78
78,157
[no value]
[no value]
How Much Science Do You Know?
Here Are Correct Answers to Questions on Page 78
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[no value]
[no value]
THE man who has stored in the back of his head a working knowledge of the fundamental facts of science possesses an important asset in these days of scientific achievement, whatever his work may be. For that reason POPULAR SCIENCE MONTHLY publishes each month a list of a dozen questions about scientific facts.
PopularScience_19250201_0106_002_0135.xml
article
79
79
[no value]
[no value]
Mechanical Merry-Go-Round and See-Saw for Children
[no value]
[no value]
[no value]
[no value]
AROUND they go on their merry-go-round, and up and down on their see-saws, for the ingenious new mechanical plaything seen in the photograph is a combination of the two amusements. As it teeters, it revolves—this “merry-gobob,” which seems sure to find favor with children who like to make things go by their own efforts.
PopularScience_19250201_0106_002_0136.xml
article
79
79
[no value]
[no value]
Flaws in Big Guns Are Revealed by X-Ray
[no value]
[no value]
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[no value]
THE use of a newly devised X-ray testing apparatus soon may make it possible to detect flaws in large guns and other ordnance, which, if not found, might cause disastrous explosions such as have occurred in the past. This was the recent statement of Col.
PopularScience_19250201_0106_002_0137.xml
article
79
79
[no value]
[no value]
Know Your Car
[no value]
[no value]
[no value]
[no value]
Starting troubles, which come regularly with zero temperatures, can be lessened by a few simple precautions. In winter the main resistance to cranking is the stiffened, chilled oil film on the cylinder walls. If you keep your car in a cold garage, add warm water to the engine jackets.
PopularScience_19250201_0106_002_0138.xml
article
79
79
[no value]
[no value]
New Type of Windmill Runs without a Vane
[no value]
[no value]
[no value]
[no value]
Two South Africans, Messrs. Oohlson and Henning, are the inventors of this new type of vaneless windmill designed so that its sails will operate and drive the pump without shifting their direction according to the direction of the wind.Two semicircular sails are arranged at right angels to each other in such a way that a surface always is presented to the wind.
PopularScience_19250201_0106_002_0139.xml
article
80
80,81
[no value]
[no value]
New Inventions to Lighten the Drudgery of Housework
Here Are 16 Useful Mechanical Utensils and Electrical Appliances to Save Time and Labor
[no value]
[no value]
[no value]
This light electric iron for shaping hats can be used with a handle, or clamped in a stationary base A handle that will not get hot and terminal that will not burn out are advantages claimed for this electric iron. Ventilation at the back and around the handle attachment prevents excessive heat This new cakepan has two removable bottoms, a flat one for layer cakes, and one with a tubular center for angel food Although small enough to be placed on a shelf, the com pact electric range shown at the left has ample capacity to do every sort of cooking for a family of five.
PopularScience_19250201_0106_002_0140.xml
article
82
82
[no value]
[no value]
How Wireless Is Used to Steer Vessels into Port
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[no value]
[no value]
[no value]
AN ILLUSTRATED article in the December issue of POPULAR SCIENCE MONTHLY described an amazing new use for Marconi’s system of reflected beam radio transmission—the “radio lighthouse” which, in recent tests, has proved successful in guiding ships through heavy fogs.
PopularScience_19250201_0106_002_0141.xml
article
83
83,84,159
[no value]
[no value]
Your Dials—Keys to the Air
Radio Expert Tells How to Tune Your Set for Best Results
Science of Cross-Words
[no value]
[no value]
Jack Binns
THERE are certain little knacks in tuning a radio set that come with experience and knowledge of the set itself, but that can be acquired by any novice without great difficulty. In this article I shall outline the best methods of tuning for each of the basic systems of reception in general use.
PopularScience_19250201_0106_002_0142.xml
article
85
85,160
[no value]
[no value]
How to Do Good Soldering
The Easiest and Quickest Way to Make Radio Connections
[no value]
[no value]
John Carr
ONE of the main reasons why so many of the manufacturers of radio parts are fitting their instruments with solder lugs is because soldering is the easiest, quickest, and best way to make electrical connections. Beginners are inclined to doubt this fact after their first session with a soldering iron chiefly because they do not know how it should be done.
PopularScience_19250201_0106_002_0143.xml
article
86
86,87,162,163,164
[no value]
[no value]
A Four-Tube Set to Fit Your Phonograph Cabinet
How to Build an Economical Receiver of Unusual Tone Quality
THE PARTS YOU WILL NEED
HOW TO BUILD THE RECEIVER
HOW TO DO THE WIRING
HOW TO INSTALL THE RECEIVER
TO OPERATE THE RECEIVER
Recent Publications
[no value]
[no value]
Alfred P. Lane
HERE is a radio receiving set arranged so that you can fit it the record compartment of almost any standard phonograph. And it is a set that is well worth building, because it combines sensitiveness and selectivity with ease of control and the finest possible reproduction of broadcast music and speech.
PopularScience_19250201_0106_002_0144.xml
article
88
88
[no value]
[no value]
How Radio Gyps Duped Me
The Story of a Victim Who Built a Set of Junk
The Proof of Reliability
[no value]
[no value]
Newton Burke
AS A radio fan, I am no longer a beginner—at least I have reached a point in my pursuit of the mystery of radio where I find a little less mystery and hear a little more radio. It all began during what might well be called the gold-rush days of radio, when the craze had obtained its first hold on the imagination of the public.
PopularScience_19250201_0106_002_0145.xml
article
89
89
[no value]
[no value]
The Month’s Curiosities in Radio
A Multiple Hook-Up—Unusual Sets and Accessories
Fuse Protects the Tubes It is connected in the minus B bat-
Radio Set in Vanity Case
This Fan Tries Them All
The Radio Peddler Appears
Old Shoe Houses Radio
Loudspeaker like Throat
[no value]
[no value]
[no value]
It is connected in the minus B battery line and will burn out instantly when the current rises to between 140 and 200 milliamperes, so that if the high-voltage wires in the receiver become crossed with the filament circuits, or the B battery is accidentally connected in place of the A battery, the fuse will burn out and the tube filaments will not be injured at all Another of the novelty receivers at the Chicago.
PopularScience_19250201_0106_002_0146.xml
article
90
90,91
[no value]
[no value]
SKIDDING—-How to Avoid It
An automobile expert tells of simple ways to save your car from disaster on treacherous roads
$50 in Prizes
[no value]
[no value]
George Arthur Luers
ALIGHT car and a heavy foot make a combination that works well as long as you traverse dry and unobstructed concrete roads. But when the roads are glazed with ice, when they are wet from snow or rain, when they are freshly oiled, when a light rain has converted the fine dust on old roads into slippery mud, when you attempt to avoid a stretch of bad going by driving on wet trolley tracks — then this combination is likely to prove dangerous; for it leads to skidding.
PopularScience_19250201_0106_002_0147.xml
article
92
92
[no value]
[no value]
Saving Auto-Repair Costs
What the Car-Owner Can Do for Himself
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[no value]
[no value]
FINDING it next to a impossible to clamp a ball-socket cap in a vise for filling I made a convennient holder out of two old caps and two bolts, as shown in Fig. 1. The old caps are gripped in the vise and the one to be filed is laid over them. If no vise is at hand the cap and holder can be rubbed over a file lying flat on the bench.—LAWRENCE TORELL. TO REMOVE or replace a crankcase is a difficult and annoying job for one man.
PopularScience_19250201_0106_002_0148.xml
article
93
93,132,133
The Home Workshop
[no value]
How You Can Build a Snow Igloo
What the Mechanical Departments Offer You
[no value]
[no value]
Fitzhugh Green
WITH his right arm afire like a torch, an Eskimo boy burst screaming from a snow igloo. Lieut.Comm. Green, U.S.N., busy withdog harness near by, seized the pain-crazed lad, smothered the flames, and doctored the burns so skilfully that they healed.
PopularScience_19250201_0106_002_0149.xml
article
94
94,123,124,125
[no value]
[no value]
Beautiful Salem Chest Easily Made
Has no Difficult Joints to Puzzle the Beginner in Woodwork
[no value]
[no value]
[no value]
IF YOU are a relative beginner in woodwork and wish to astonish your family and friends by building a piece of furniture that will appear to be the work of an experienced craftsman, you cannot find a better project than the attractive Salem chest of drawers illustrated at the right.
PopularScience_19250201_0106_002_0150.xml
advertisement
95
95
[no value]
[no value]
S. C. JOHNSON & SON: JOHNSON’S WOOD DYE
[no value]
S. C. JOHNSON & SON
JOHNSON’S WOOD DYE
[no value]
[no value]
PopularScience_19250201_0106_002_0151.xml
article
96
96,122
The Home Workshop
[no value]
Making Removable Seat Cushions
Easy Ways to Do Your Own House and Auto Upholstering
Starting a Cold Engine
[no value]
[no value]
William T. Weld
H. W.
A COMFORTABLE seat with a good cushion is a combination not always encountered. Office workers, draftsmen, motormen, and many others sit on hard stools that would be much less fatiguing if provided with cushions. It is not always possible, however, to get a cushion that will fit the chair or stool you use.
PopularScience_19250201_0106_002_0152.xml
advertisement
97
97
[no value]
[no value]
DIAMOND STATE FIBRE COMPANY: CELORON BAKELITE RADIO PANEL
[no value]
DIAMOND STATE FIBRE COMPANY
CELORON BAKELITE RADIO PANEL
[no value]
[no value]
PopularScience_19250201_0106_002_0153.xml
article
98
98,140,141,142,143
Better Shop Methods
How Expert Mechanics Save Time and Labor
Secrets of Success in Grinding
What Every Machinist Should Know about Abrasives
[no value]
[no value]
H. L. Wheeler
THE art of finishing metal surfaces by grinding is a branch, of metal working with which you should be familiar if you are connected in any way with machine - shop work. While grinding has been in use almost as long as the practice of hardening of metals and tools, and probably was first used in connection with the reduction of metal that had been hardened, such as axes, tools, and machine parts requiring to be finished after hardening, the practice has grown enormously.
PopularScience_19250201_0106_002_0154.xml
advertisement
99
99
[no value]
[no value]
THE L. S. STARRETT CO.
[no value]
THE L. S. STARRETT CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0155.xml
advertisement
100
100
[no value]
[no value]
Trimont Mfg. Co.: TRIMO
[no value]
Trimont Mfg. Co.
TRIMO
[no value]
[no value]
PopularScience_19250201_0106_002_0156.xml
article
100
100
The Home Workshop
[no value]
Novel Glue-Spreader Cheaply Built
[no value]
[no value]
[no value]
A. E. Elling
A MACHINE for spreading glue on the edges of boards, built as shown, will pay many times over for the slight cost and labor required in its construction. As compared with using a glue-brush, it saves a great deal of time. Furthermore, it prevents waste of glue left on the face of the work, because of the unequal brush distribution.
PopularScience_19250201_0106_002_0157.xml
article
100
100,127
The Home Workshop
[no value]
How to Build a Dutch Crafts Hall Chair
[no value]
[no value]
[no value]
J. T. GARVER
THE Dutch crafts chair illustrated is built on simple although unique lines. The necessary material, except the seat, may be cut from a clear, straight, well - seasoned oak or poplar board 12 in. wide, ¾in. thick and 6 ft. long. To preserve the lines, however, the seat, A, should be 1 ¾ in.
PopularScience_19250201_0106_002_0158.xml
advertisement
101
101
[no value]
[no value]
NATIONAL CARBON COMPANY, INC.: Eveready Radio Battery
[no value]
NATIONAL CARBON COMPANY, INC.
Eveready Radio Battery
[no value]
[no value]
PopularScience_19250201_0106_002_0159.xml
advertisement
102
102,103
[no value]
[no value]
DE FOREST RADIO CO.: De Forest Radiophone
[no value]
DE FOREST RADIO CO.
De Forest Radiophone
[no value]
[no value]
PopularScience_19250201_0106_002_0160.xml
advertisement
104
104
[no value]
[no value]
SAND'S LEVEL & TOOL CO.
[no value]
SAND'S LEVEL & TOOL CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0161.xml
article
104
104,126
The Home Workshop
[no value]
How to Cut an Attractive Archway
[no value]
[no value]
[no value]
Edwin M. Love
IN MANY sections of the country, especially where architects of the first rank have influenced the design of small homes, it is now the custom to connect the living-room with the dining-room by means of a large plastered opening without doors or portieres.
PopularScience_19250201_0106_002_0162.xml
advertisement
105
105
[no value]
[no value]
Taylor Instrument Companies: Taylor Temprite Window Thermometer
[no value]
Taylor Instrument Companies
Taylor Temprite Window Thermometer
[no value]
[no value]
PopularScience_19250201_0106_002_0163.xml
advertisement
106
106
[no value]
[no value]
THE DAVID MAYDOLE HAMMER CO.
[no value]
THE DAVID MAYDOLE HAMMER CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0164.xml
article
106
106
The Home Workshop
[no value]
Snowball Press for Winter Battles
[no value]
[no value]
[no value]
[no value]
WHEN sides are lined up for a good, old-fashioned snowball battle, the team that usually wins is the one best able to hurl over the ammunition. This depends upon the supply as well as the accuracy of throwing. The press illustrated has been designed to turn out rough-shaped snowballs in large quantities.
PopularScience_19250201_0106_002_0165.xml
article
106
106
The Home Workshop
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Speedy Coaster Has Corrugated-Iron Bottom
[no value]
[no value]
[no value]
[no value]
COASTING sleds and double runners are always more or less expensive to build. The coaster I am going to describe, however, is one that can be constructed very cheaply. The running surface is composed of a sheet of old corrugated-iron roofing nailed to a flat board surface with the seat mounted just above it on two blocks.
PopularScience_19250201_0106_002_0166.xml
advertisement
107
107
[no value]
[no value]
EAGLE RADIO CO.
[no value]
EAGLE RADIO CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0167.xml
advertisement
108
108
[no value]
[no value]
Snap-On Wrench Co.: Socket Wrenches
[no value]
Snap-On Wrench Co.
Socket Wrenches
[no value]
[no value]
PopularScience_19250201_0106_002_0168.xml
article
108
108
The Home Workshop
[no value]
Easily Worked Sheet Lead Used to Ornament Treasure Chest
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[no value]
[no value]
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IN THE studio of a certain New York artist, whose work is well known, to the readers of POPULAR SCIENCE MONTHLY, there was a table that always had a rather bare and forlorn appearance amid its rich and colorful surroundings. "Do you know what I think that table needs?" the artist remarked to a friend one day.
PopularScience_19250201_0106_002_0169.xml
advertisement
109
109
[no value]
[no value]
C. Brandes. Inc.
[no value]
C. Brandes. Inc.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0170.xml
advertisement
110
110
[no value]
[no value]
The Veeder Mfg. Co.: Speed Counter
[no value]
The Veeder Mfg. Co.
Speed Counter
[no value]
[no value]
PopularScience_19250201_0106_002_0171.xml
article
110
110
The Home Workshop
[no value]
Making a Wash-Boiler Sport Sled
[no value]
[no value]
[no value]
Dale R. Van Horn
THIS sled, painted in red or yellow and black, will be the envy of every boy in the neighborhood. It requires a little skill in fitting the pieces, but there is nothing really difficult about the construction, and the cost for materials is small.
PopularScience_19250201_0106_002_0172.xml
advertisement
111
111
[no value]
[no value]
Music Master Corporation
[no value]
Music Master Corporation
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0173.xml
advertisement
112
112
[no value]
[no value]
Advertisement: YANKEE TOOLS
[no value]
[no value]
YANKEE TOOLS
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[no value]
PopularScience_19250201_0106_002_0174.xml
article
112
112
The Home Workshop
[no value]
Steps and Stools for Household Use
[no value]
[no value]
[no value]
[no value]
FOR use around the home, office, or factory, portable steps made as illustrated are often useful. The handle saves stooping and makes it easy to carry the steps in one hand. A small stool also has many uses. The legs of the one shown at the right are sawn out at one time from two boards tacked together.
PopularScience_19250201_0106_002_0175.xml
article
112
112
The Home Workshop
[no value]
Toy Ice-Boat Sails as Fast as the Wind
[no value]
[no value]
[no value]
FRANK HARAZIM, N.Y.
SAILING a model ice-boat is a fascinating diversion from the more ordinary winter sports of skating and hockey. To build a toy of this kind, Construct a frame of two pieces of wood, one 3/8 in. by 1 1/2 by 10 in., and the other 3/4 by 1 1/2 by 24 in., lapped and nailed together to cross.
PopularScience_19250201_0106_002_0176.xml
advertisement
113
113
[no value]
[no value]
CHICAGO ENGINEERING WORKS
[no value]
CHICAGO ENGINEERING WORKS
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0177.xml
advertisement
114
114
[no value]
[no value]
Advertisements
[no value]
Smith & Hemenway Co., Inc.
“Red Devil” Pliers
Smith & Hemenway Co., Inc.
"Red Devil” Adjustable Wrench
[no value]
[no value]
PopularScience_19250201_0106_002_0178.xml
article
114
114
The Home Workshop
[no value]
Tool Cabinet Combined with Bench
[no value]
[no value]
[no value]
G.A. L.
"THE bench in my garage isn’t of much use,” Frank Robey, a neighbor of mine, remarked one day. “It always seems to be on the wrong side or end of the car. It gets in my way when. I am washing the car with the hose, and whenever I work outside, Under the oak tree,the bench might as well not exist all.” "why don't you make yourself a portable bench?” I suggested.
PopularScience_19250201_0106_002_0179.xml
article
114
114
The Home Workshop
[no value]
Neat Case Camouflages Alarm Clock
Ornamental Desk Eraser
[no value]
[no value]
J.E.N.
OCCASION recently arose in a technical laboratory to install an alarm clock. Although the best grade of alarm clock was purchased for the purpose, its nickel finish did not harmonize well with the elaborate mahogany fittings of the balance of the apparatus.
PopularScience_19250201_0106_002_0180.xml
advertisement
115
115
[no value]
[no value]
Montgomery Ward &Co.
[no value]
Montgomery Ward &Co.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0181.xml
advertisement
116
116
[no value]
[no value]
RAULAND MANUFACTURING CO.
[no value]
RAULAND MANUFACTURING CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0182.xml
article
116
116
The Home Workshop
[no value]
Tricky Quebec Ski Coaster
[no value]
[no value]
[no value]
EDMUND L. NESBITT
THIS tricky coaster seems to be a purely French-Canadian invention, seldom seen outside Quebec Province. It is made of the front half of a ski, usually found among winter equipment in the cellar. Its length will depend upon the size of the user—4 ft.
PopularScience_19250201_0106_002_0183.xml
article
116
116
The Home Workshop
[no value]
Small Soldering Copper Useful in Radio Construction
[no value]
[no value]
[no value]
W. E.
FOR radio work and other small soldering jobs many makeshift soldering coppers are used. Most of them are open to the objection that the tinning burns off too easily I find this difficulty is overcome by making a copper, as shown above, from a disk about the same diameter as as Canadian penny.
PopularScience_19250201_0106_002_0184.xml
article
116
116
The Home Workshop
[no value]
Bicycle Spoke Forms Substitute for Jeweler’s Screwdriver
[no value]
[no value]
[no value]
Elizabeth, La.
FOR tightening the bows of spectacles or the screws that hold a watch movement in the case, or other small screws, it is necessary to use a jeweler's screwdriver. If one of these is not at hand, a substitute may be made from the spoke or a bicycle wheel.
PopularScience_19250201_0106_002_0185.xml
article
117
117
The Home Workshop
[no value]
Comical Boxing Dolls Made of Putty, Lead, and Wire
[no value]
[no value]
[no value]
Kenneth B. Murray
BOXING dolls that are comical in action and certain to cause hilarity in any company of children or grown-ups, can be made quite easily. A white and a colored boxer, possibly representing Dempsey and Wills, make a lively and mirth-provoking pair.
PopularScience_19250201_0106_002_0186.xml
advertisement
117
117
[no value]
[no value]
GOODELL-PRATT COMPANY: Ratchet
[no value]
GOODELL-PRATT COMPANY
Ratchet
[no value]
[no value]
PopularScience_19250201_0106_002_0187.xml
advertisement
118
118
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0188.xml
advertisement
118
118
[no value]
[no value]
Kalamazoo Stove Co.
[no value]
Kalamazoo Stove Co.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0189.xml
advertisement
118
118
[no value]
[no value]
The FYR-FYTER CO.
[no value]
The FYR-FYTER CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0190.xml
article
118
118
The Home Workshop
[no value]
How to Make a Simple Clamp for Cylindrical Parts
[no value]
[no value]
[no value]
[no value]
IN MAKING up some store fixtures for display purposes the owner of a small sheet-metal shop had to devise a method for adjusting the stands up and down. The standards were of brass tubing and a setscrew was not practical. The mechanic finally adopted the means illustrated.
PopularScience_19250201_0106_002_0191.xml
article
118
118
The Home Workshop
[no value]
Extra Water Pan Improves “Pipeless” Heating Plant
[no value]
[no value]
[no value]
L. R.
IN A hot-air heating system, especially the pipeless type, the usual water pan seldom supplies sufficient moisture. Realizing this, the writer tried our various schemes for increasing the moisture in the heated air. The method eventually adopted gives a maximum of moisture and the water pan is fillld without going down cellar.
PopularScience_19250201_0106_002_0192.xml
article
119
119
The Home Workshop
[no value]
Clamp Holds Voltammeter on Face of Radio Panel
[no value]
[no value]
[no value]
PHILIPPE A. JUDD
IF YOU use a voltammeter in connection with your radio set, you can keep it handy by mounting it on the panel at shown below. Out out the camp with tinner's snips from 1/16-in. sheet brass and drill the center hole, countersinking it to take a flat-head machine screw.
PopularScience_19250201_0106_002_0193.xml
article
119
119
The Home Workshop
[no value]
Light, Handy Nail Box Made from Old Tobacco Tins
[no value]
[no value]
[no value]
R. M. REKERT
MADE from empty 1/2-lb. tobacco tins with rolled edges, the combination nail box illustrated is a handy and timesaving container for the home workshop. It is useful also or carpenters especially finisher on trim and interior Woodwork.
PopularScience_19250201_0106_002_0194.xml
article
119
119
The Home Workshop
[no value]
Fitting Tool Handles Quickly with a Grinding Wheel
[no value]
[no value]
[no value]
[no value]
MUCH laborious whittling and shaving on hardwood handles can be avoided and a snug fit easily obtained by cutting down the handle to size on a coarse grinding wheel. This method seems to be little known, judging from the number of men who use a slower method.
PopularScience_19250201_0106_002_0195.xml
advertisement
119
119
[no value]
[no value]
Brown & Sharpe Mfg. Co.: BROWN & SHARPE TOOLS
[no value]
Brown & Sharpe Mfg. Co.
BROWN & SHARPE TOOLS
[no value]
[no value]
PopularScience_19250201_0106_002_0196.xml
advertisement
120
120
[no value]
[no value]
PECK STOW & WILCOX CO.: PEXTO
[no value]
PECK STOW & WILCOX CO.
PEXTO
[no value]
[no value]
PopularScience_19250201_0106_002_0197.xml
article
120
120,121
The Home Workshop
[no value]
Building an Aerial Mast that Requires No Guy Wires
[no value]
[no value]
[no value]
A. E. E.
THE radio fan often can improve the volume and range of his receiving set to the equivalent of one or two additional tubes by constructing a fairly high outside aerial. The only problem to be solved is in the erection of a neat, storng mast for supporting the far end of the antenna the near end can be fastened to the house.
PopularScience_19250201_0106_002_0198.xml
advertisement
121
121
[no value]
[no value]
SIMONDS SAW AND STEEL COMPANY
[no value]
SIMONDS SAW AND STEEL COMPANY
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0199.xml
advertisement
122
122
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0200.xml
advertisement
123
123
[no value]
[no value]
THE PALMOLIVE COMPANY (Del. Corp.)
[no value]
THE PALMOLIVE COMPANY (Del. Corp.)
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0201.xml
advertisement
124
124
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0202.xml
article
125
125
The Home Workshop
[no value]
Old Inner Tube Used to Dress Farm Machinery Belts
[no value]
[no value]
[no value]
F. L. CLARK
TO DRESS farm machinery belts, an Iowa farmer folds a piece of inner tube, heats it at the tractor exhaust until it is soft, and rubs the melted end on the under side of the belts.
PopularScience_19250201_0106_002_0203.xml
advertisement
125
125
[no value]
[no value]
EISEMANN MAGNETO CORPORATION: 6-D Broadcast Receiver
[no value]
EISEMANN MAGNETO CORPORATION
6-D Broadcast Receiver
[no value]
[no value]
PopularScience_19250201_0106_002_0204.xml
advertisement
126
126
[no value]
[no value]
FANSTEEL PRODUCTS CO., Inc.: Balkite Battery Charger
[no value]
FANSTEEL PRODUCTS CO., Inc.
Balkite Battery Charger
[no value]
[no value]
PopularScience_19250201_0106_002_0205.xml
advertisement
126
126
[no value]
[no value]
The Parks Ball Bearing Machine Company
[no value]
The Parks Ball Bearing Machine Company
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0206.xml
advertisement
126
126
[no value]
[no value]
RANDOLPH RADIO CORP.
[no value]
RANDOLPH RADIO CORP.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0207.xml
article
126
126
The Home Workshop
[no value]
Tool Rack and Scraper Handle Made from Clothespins
[no value]
[no value]
[no value]
F. N. 0.
BY DRIVING headless clothespins into holes bored in a 3/4-in. board, it is possible to make a handy tool-rack for small tools.A clothespin also makes good handle for safety-razor blade. Whittle the ends to fit two small blocks, as shown, place the blade between the blocks, and clamp tightly with a machine screw and thumb nut.
PopularScience_19250201_0106_002_0208.xml
article
127
127
The Home Workshop
[no value]
How to Hollow Grind Your Ice Skates Easily
[no value]
[no value]
[no value]
F. S. ROOT
IF AN ordinary emery wheel is available, it is the work of a few minutes to make the wooden jig, or bracket shown, on which ice skates can be clamped for sharpening. Care should be taken that when the skate is clamed in position, as illustrated, the center of the skate edge is on a level with the center of the wheel.
PopularScience_19250201_0106_002_0209.xml
advertisement
127
127
[no value]
[no value]
The AUTOMATIC ELECTRICAL DEVICES CO.: GOLD SEAL HOMCHARGER
[no value]
The AUTOMATIC ELECTRICAL DEVICES CO.
GOLD SEAL HOMCHARGER
[no value]
[no value]
PopularScience_19250201_0106_002_0210.xml
advertisement
128
128
[no value]
[no value]
SOUTH BEND LATHE WORKS
[no value]
SOUTH BEND LATHE WORKS
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0211.xml
advertisement
128
128
[no value]
[no value]
C.G.CONN, Ltd.
[no value]
C.G.CONN, Ltd.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0212.xml
advertisement
128
128
[no value]
[no value]
WORLD BATTERY COMPANY
[no value]
WORLD BATTERY COMPANY
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0213.xml
article
128
128
The Home Workshop
[no value]
Home Workshop Blueprints Make Furniture Building Easy
Complete List of Blueprints
[no value]
[no value]
[no value]
BEGINNERS in woodwork frequently write the Editor asking which furniture blueprints in the Home Workshop series are the simplest.The easiest ones are Nos. 3, 35, 37, and 39 in the list below. Their simplicity lies in the absence of difficult joints.
PopularScience_19250201_0106_002_0214.xml
article
129
129
[no value]
[no value]
Home Workshop Chemistry
Simple Formulas that Will Save Time and Money
[no value]
[no value]
[no value]
OVERHEATED machinery, engine and motor bearings can an be detected instantly if they are painted with a preparation of silver mercurie iodide, which is a chemical most sensitive to temperature changes. This paint can be prepared in any home workshop.
PopularScience_19250201_0106_002_0215.xml
advertisement
129
129
[no value]
[no value]
Mohawk Electric Corporation
[no value]
Mohawk Electric Corporation
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0216.xml
advertisement
130
130
[no value]
[no value]
Advertisement: RADIO CATALOG
[no value]
[no value]
RADIO CATALOG
[no value]
[no value]
PopularScience_19250201_0106_002_0217.xml
advertisement
130
130
[no value]
[no value]
LOFTIS BROS. & CO.: DIAMONDS WATCHES
[no value]
LOFTIS BROS. & CO.
DIAMONDS WATCHES
[no value]
[no value]
PopularScience_19250201_0106_002_0218.xml
advertisement
130
130
[no value]
[no value]
METALLIC LETTER CO.
[no value]
METALLIC LETTER CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0219.xml
article
130
130
The Home Workshop
[no value]
$50 For Unusual Handicraft Photos
[no value]
[no value]
[no value]
[no value]
IF YOU make a hobby of your home workshop, you may have built at some time or other a piece of furniture, a model, a toy, sporting equipment, scientific apparatus, or some sort of household utility that is out of the ordinary—something that causes your friends to exclaim: “How did you ever manage to make that?” Such an article is the inlaid library table described below.
PopularScience_19250201_0106_002_0220.xml
article
130
130,131
The Home Workshop
[no value]
5022 Pieces of Wood Inlaid in Library Table Top
[no value]
[no value]
[no value]
[no value]
ONE typical variety of wood from each state in the Union, as Alaska, Cuba, Hawaii, and the Philippines is inlaid in the top of the unique library table illustrated below. It is the work of Gordor H. Turner, Professor of Physics and Chemistry at David Lipscomb College, Nashville, Tenn.
PopularScience_19250201_0106_002_0221.xml
article
131
131
The Home Workshop
[no value]
Novel Skis Made Cheaply from Rain-Conductor Pipe
[no value]
[no value]
[no value]
L. R.
DISCARDED galvanized rain-conductor pipe, which can be picked up in almost any second-hand lumber yard, will make a novel pair of skis. Cut off two pieces 6 ft. long and, just forward of the center, make two slots, as shown, about 15 in. apart.
PopularScience_19250201_0106_002_0222.xml
advertisement
131
131
[no value]
[no value]
THOMAS NELSON & SONS: Nelson’s Perpetual Loose-Leaf Encyclopaedia
[no value]
THOMAS NELSON & SONS
Nelson’s Perpetual Loose-Leaf Encyclopaedia
[no value]
[no value]
PopularScience_19250201_0106_002_0223.xml
advertisement
132
132
[no value]
[no value]
Larus & Brother Company: Edgeworth
[no value]
Larus & Brother Company
Edgeworth
[no value]
[no value]
PopularScience_19250201_0106_002_0224.xml
advertisement
132
132
[no value]
[no value]
WORLD BATTERY COMPANY
[no value]
WORLD BATTERY COMPANY
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0225.xml
advertisement
132
132
[no value]
[no value]
SMOOTH-ON MFG. CO.
[no value]
SMOOTH-ON MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0226.xml
advertisement
132
132
[no value]
[no value]
OTTAWA MFG.CO.
[no value]
OTTAWA MFG.CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0227.xml
article
133
133
The Home Workshop
[no value]
Quickly Built Box Makes Sled Comfortable for Baby
[no value]
[no value]
[no value]
[no value]
HOW a child’s sled may be made into a useful conveyance for the baby with very little work and almost no expense, is shown in the accompanying illustrations. A few boards from a dry-goods box can be utilized, or a 1/2-in. board bought at the lumber yard.
PopularScience_19250201_0106_002_0228.xml
advertisement
133
133
[no value]
[no value]
SARGENT & COMPANY, Manufacturers
[no value]
SARGENT & COMPANY, Manufacturers
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0229.xml
advertisement
133
133
[no value]
[no value]
POPULAR SCIENCE
[no value]
POPULAR SCIENCE
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0230.xml
advertisement
134
134
[no value]
[no value]
INTERNATIONAL CORRESPONDENCE SCHOOLS
[no value]
INTERNATIONAL CORRESPONDENCE SCHOOLS
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0231.xml
article
134
134,135
[no value]
[no value]
The Shipshape Home
Clothes-Line Reel
A Heat-Retaining Cover
Mending Gas-Hose
Improving Furnace Draft
Improving Wide Flooring
Stucco Ceiling Finish
Screw for Door Spindle
[no value]
[no value]
[no value]
THE task of keeping the yard shipshape in appearance is made-easier when a strong, smoothly working, convenient reel is provided for the clothes-line. To make one obtain the crankshift and belt wheel of an old sewing-machine. Build a board drum just by nailing boards firmly together with the crankshaft between.
PopularScience_19250201_0106_002_0232.xml
advertisement
135
135
[no value]
[no value]
Electrical Research Laboratories: Erla CIR-KIT
[no value]
Electrical Research Laboratories
Erla CIR-KIT
[no value]
[no value]
PopularScience_19250201_0106_002_0233.xml
advertisement
135
135
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0234.xml
advertisement
135
135
[no value]
[no value]
Hobart Bros. Co.
[no value]
Hobart Bros. Co.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0235.xml
advertisement
135
135
[no value]
[no value]
Advertisements
[no value]
Buffalo Jewelry Mfg.Co.
Solid Gold
Buffalo Jewelry Mfg.Co.
HOPE RUBY
[no value]
[no value]
PopularScience_19250201_0106_002_0236.xml
advertisement
136
136
[no value]
[no value]
FAYETTE R. PLUMB, Inc.
[no value]
FAYETTE R. PLUMB, Inc.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0237.xml
article
136
136,137,138,139
BetterShop Methods
[no value]
What You Can Do with the Aid of a Portable Electric Drill
[no value]
[no value]
[no value]
George Arthur Luers
THE foundry was about to pour a 10-ton casting. The furnace was up to heat with 14 tons of molten steel. The mold was complete to the final detail. Two weeks of exacting preparatory work has made all ready for the pour. As a last precaution, the molder tried out the release before filling the crucible.
PopularScience_19250201_0106_002_0238.xml
advertisement
137
137
[no value]
[no value]
ADAMS MORGAN CO., Inc.: Paragon Four
[no value]
ADAMS MORGAN CO., Inc.
Paragon Four
[no value]
[no value]
PopularScience_19250201_0106_002_0239.xml
advertisement
137
137
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0240.xml
advertisement
137
137
[no value]
[no value]
W. B. & J. E. BOICE: BOICE-CRANE JUNIOR SAW
[no value]
W. B. & J. E. BOICE
BOICE-CRANE JUNIOR SAW
[no value]
[no value]
PopularScience_19250201_0106_002_0241.xml
advertisement
138
138
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0242.xml
article
139
139
Better Shop Methods
[no value]
Cutter Grinding Arbor
[no value]
[no value]
[no value]
[no value]
THIS arbor is designed for grinding the outside diameter on removable drill and reamer cutters. The cutter is held on the arbor with two fillister-head screws in the same position in relation to the center as it is when in place in the drill or reamer body.
PopularScience_19250201_0106_002_0243.xml
advertisement
139
139
[no value]
[no value]
WEEKS SUPER CARBURETOR CO.
[no value]
WEEKS SUPER CARBURETOR CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0244.xml
advertisement
139
139
[no value]
[no value]
Chas. A. Branston, Inc.: HONEYCOMB COILS
[no value]
Chas. A. Branston, Inc.
HONEYCOMB COILS
[no value]
[no value]
PopularScience_19250201_0106_002_0245.xml
advertisement
139
139
[no value]
[no value]
Arkograf Pen Co.
[no value]
Arkograf Pen Co.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0246.xml
advertisement
139
139
[no value]
[no value]
Taylor Cap Manufacturers
[no value]
Taylor Cap Manufacturers
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0247.xml
advertisement
140
140
[no value]
[no value]
The Bristol Company: BRISTOL LOUD SPEAKER
[no value]
The Bristol Company
BRISTOL LOUD SPEAKER
[no value]
[no value]
PopularScience_19250201_0106_002_0248.xml
advertisement
140
140
[no value]
[no value]
APCO MFG. CO.
[no value]
APCO MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0249.xml
advertisement
140
140
[no value]
[no value]
E. D. FAHLBERG MFG. CO.
[no value]
E. D. FAHLBERG MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0250.xml
advertisement
141
141
[no value]
[no value]
THE MAGNAVOX COMPANY: MAGNAVOX Radio
[no value]
THE MAGNAVOX COMPANY
MAGNAVOX Radio
[no value]
[no value]
PopularScience_19250201_0106_002_0251.xml
advertisement
141
141
[no value]
[no value]
Reliable Adding Mach.Corp.
[no value]
Reliable Adding Mach.Corp.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0252.xml
advertisement
141
141
[no value]
[no value]
THE W. L. EVANS SCHOOL OF CARTOONING
[no value]
THE W. L. EVANS SCHOOL OF CARTOONING
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0253.xml
advertisement
142
142
[no value]
[no value]
RADIO RECEPTOR CO.: MULTIFLEX KIT
[no value]
RADIO RECEPTOR CO.
MULTIFLEX KIT
[no value]
[no value]
PopularScience_19250201_0106_002_0254.xml
advertisement
142
142
[no value]
[no value]
General Adding Machine Exchange: Burroughs Adding Machine
[no value]
General Adding Machine Exchange
Burroughs Adding Machine
[no value]
[no value]
PopularScience_19250201_0106_002_0255.xml
advertisement
142
142
[no value]
[no value]
Howard
[no value]
Howard
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0256.xml
advertisement
143
143
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0257.xml
advertisement
144
144
[no value]
[no value]
AMSCO PRODUCTS, Inc.
[no value]
AMSCO PRODUCTS, Inc.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0258.xml
advertisement
144
144
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0259.xml
advertisement
144
144
[no value]
[no value]
Louis Bossert & Sons, Inc.
[no value]
Louis Bossert & Sons, Inc.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0260.xml
advertisement
144
144
[no value]
[no value]
KELLOGG SWITCHBOARD & SUPPLY COMPANY
[no value]
KELLOGG SWITCHBOARD & SUPPLY COMPANY
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0261.xml
article
144
144
Better Shop Methods
[no value]
New Transmission Controls Speed of Machine Tools
[no value]
[no value]
[no value]
A. P. C.
FOR controlling the speed of machine tools and various type of machinery, the variable speed transmission illustrated below was developed recently. As applied to a drill press, the device allows the speed to be increased or retarded without stopping the drill or shirting belts or gears.
PopularScience_19250201_0106_002_0262.xml
article
144
144
Better Shop Methods
[no value]
Shop Loading Platform Built to Resist Hard Usage
[no value]
[no value]
[no value]
[no value]
MOST of the loading platforms for lift trucks go to pieces in a shot time, whether commercial or shopmade. The platform illustrated has been in competition with other designs long enough to prove its superiority over the more usual designs.
PopularScience_19250201_0106_002_0263.xml
article
145
145,146
BetterShop Methods
[no value]
How Would You Machine This Awkward Piece?
[no value]
[no value]
[no value]
H. L. W.
HERE’S an interesting machine-shop problem for you. Do you know a better or quicker method of machining the piece illustrated below than that described by the contributor? If you do, send a sheet showing the operations, with whatever explanator, sketches are necessary to the Editor, Better Shop Methoods Department, POPULAR SCIENCE MONTHLY, 250 Fourth Avenue, New York.
PopularScience_19250201_0106_002_0264.xml
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145
145
[no value]
[no value]
J. H. McSweeny, Pres.
[no value]
J. H. McSweeny, Pres.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0265.xml
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145
145
[no value]
[no value]
Mathias KLEIN &. Sons
[no value]
Mathias KLEIN &. Sons
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0266.xml
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146
146
[no value]
[no value]
BURGESS BATTERY COMPANY
[no value]
BURGESS BATTERY COMPANY
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0267.xml
article
146
146
Better Shop Methods
[no value]
Simple Indexing Fixture Aids in Grinding Gear Cutters
[no value]
[no value]
[no value]
[no value]
A SIMPLE fixture for holding geartooth milling cutters while grinding may be made as shown. It consists of a cast-iron plate, machined all over, provided with ,a stud for the holding the cutter, and bolted to the machine table. A stop finger, which is adjustable for cutters of varying sizes, is provided.
PopularScience_19250201_0106_002_0268.xml
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146
146
[no value]
[no value]
M. E. THORNTON, Supt. of Colonization
[no value]
M. E. THORNTON, Supt. of Colonization
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0269.xml
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146
146
[no value]
[no value]
AIR-FRICTION CARBURETOR COMPANY
[no value]
AIR-FRICTION CARBURETOR COMPANY
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0270.xml
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146
146
[no value]
[no value]
Slingerland School of Music
[no value]
Slingerland School of Music
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0271.xml
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147
147
[no value]
[no value]
AMERICAN HARD RUBBER COMPANY: RADION
[no value]
AMERICAN HARD RUBBER COMPANY
RADION
[no value]
[no value]
PopularScience_19250201_0106_002_0272.xml
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147
147
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0273.xml
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147
147
[no value]
[no value]
AMERICAN RADIO MFG. CO.
[no value]
AMERICAN RADIO MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0274.xml
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148
148
[no value]
[no value]
THE WEIL COMPANY
[no value]
THE WEIL COMPANY
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0275.xml
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148
148
[no value]
[no value]
Advertisements
[no value]
Larkin Co Inc.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0276.xml
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148
148
[no value]
[no value]
J. W. YORK & SONS
[no value]
J. W. YORK & SONS
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0277.xml
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149
149
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0278.xml
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150
150
[no value]
[no value]
FRANK HOLTON & CO.: Holton Saxophone
[no value]
FRANK HOLTON & CO.
Holton Saxophone
[no value]
[no value]
PopularScience_19250201_0106_002_0279.xml
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150
150
[no value]
[no value]
HAYNES-GRIFFIN RADIO SERVICE, Inc.
[no value]
HAYNES-GRIFFIN RADIO SERVICE, Inc.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0280.xml
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150
150
[no value]
[no value]
MARSHALL ELECTRIC COMPANY
[no value]
MARSHALL ELECTRIC COMPANY
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0281.xml
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150
150
[no value]
[no value]
OZARKA, Inc.
[no value]
OZARKA, Inc.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0282.xml
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151
151
[no value]
[no value]
CLARENCE A. O’BRIEN
[no value]
CLARENCE A. O’BRIEN
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0283.xml
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152
152
[no value]
[no value]
MUNN & CO.
[no value]
MUNN & CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0284.xml
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152
152
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0285.xml
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152
152
[no value]
[no value]
Jason Weiler & Sons: Ladies' White Gold Diamond Ring
[no value]
Jason Weiler & Sons
Ladies' White Gold Diamond Ring
[no value]
[no value]
PopularScience_19250201_0106_002_0286.xml
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152
152
[no value]
[no value]
LANCASTER & ALLWINE
[no value]
LANCASTER & ALLWINE
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0287.xml
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153
153
[no value]
[no value]
VICTOR J. EVANS & CO.
[no value]
VICTOR J. EVANS & CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0288.xml
article
154
154
[no value]
[no value]
Why Many Men Are Old at 40
Common Middle Age Ailments
100,000 Men Find Relief
All Explained in Free Book
[no value]
[no value]
Byram C. Kelly
I am past 40 myself. I had begun to wonder when I would begin to break—to lose my old-time pep and aggressiveness—when through a mutual friend I made the personal acquaintance of a certain member of the American Association for the Advancement of Science, whose wonderful work I had heard of.
PopularScience_19250201_0106_002_0289.xml
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154
154
[no value]
[no value]
Typewriter Emporium SHIPMAN-WARD MFG.CO
[no value]
Typewriter Emporium SHIPMAN-WARD MFG.CO
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0290.xml
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154
154
[no value]
[no value]
RICHARD B. OWEN
[no value]
RICHARD B. OWEN
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0291.xml
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155
155
[no value]
[no value]
The Fate-Root-Heath Company
[no value]
The Fate-Root-Heath Company
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0292.xml
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155
155
[no value]
[no value]
THE FASHION WEAR CO.
[no value]
THE FASHION WEAR CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0293.xml
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155
155
[no value]
[no value]
PHENIX RADIO CORP.
[no value]
PHENIX RADIO CORP.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0294.xml
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155
155
[no value]
[no value]
RANDOLPH & CO.
[no value]
RANDOLPH & CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0295.xml
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156
156
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0296.xml
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157
157
[no value]
[no value]
Advertisements
[no value]
THORDARSON ELECTRIC MANUFACTURING CO.
Thordarson amplification.
THORDARSON ELECTRIC MANUFACTURING CO.
Thordarson Power Amplifying Transformers
[no value]
[no value]
PopularScience_19250201_0106_002_0297.xml
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157
157
[no value]
[no value]
Long-Eakins Co.: Popcorn Crispettes
[no value]
Long-Eakins Co.
Popcorn Crispettes
[no value]
[no value]
PopularScience_19250201_0106_002_0298.xml
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157
157
[no value]
[no value]
APEX ELECTRIC MFG. CO.: Super-Heterodyne
[no value]
APEX ELECTRIC MFG. CO.
Super-Heterodyne
[no value]
[no value]
PopularScience_19250201_0106_002_0299.xml
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158
158
[no value]
[no value]
Dubilier CONDENSER AND RADIO CORPORATION: MICADONS
[no value]
Dubilier CONDENSER AND RADIO CORPORATION
MICADONS
[no value]
[no value]
PopularScience_19250201_0106_002_0300.xml
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158
158
[no value]
[no value]
INTERNATIONAL CORRESPONDENCE SCHOOLS
[no value]
INTERNATIONAL CORRESPONDENCE SCHOOLS
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0301.xml
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158
158
[no value]
[no value]
OLIVER OIL BURNER CORPORATION
[no value]
OLIVER OIL BURNER CORPORATION
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0302.xml
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159
159
[no value]
[no value]
FEDERAL TELEPHONE AND TELEGRAPH Co.
[no value]
FEDERAL TELEPHONE AND TELEGRAPH Co.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0303.xml
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159
159
[no value]
[no value]
Crown Fuel Saver Co.
[no value]
Crown Fuel Saver Co.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0304.xml
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159
159
[no value]
[no value]
U. S. TOOL COMPANY, INC.
[no value]
U. S. TOOL COMPANY, INC.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0305.xml
advertisement
160
160
[no value]
[no value]
BUESCHER BAND INSTRUMENT CO.: Saxophone
[no value]
BUESCHER BAND INSTRUMENT CO.
Saxophone
[no value]
[no value]
PopularScience_19250201_0106_002_0306.xml
advertisement
160
160
[no value]
[no value]
Advertisement: Cunningham radio tubes
[no value]
[no value]
Cunningham radio tubes
[no value]
[no value]
PopularScience_19250201_0106_002_0307.xml
advertisement
160
160
[no value]
[no value]
First Hawaiian Conservatory. of Music, Inc.: Guitar
[no value]
First Hawaiian Conservatory. of Music, Inc.
Guitar
[no value]
[no value]
PopularScience_19250201_0106_002_0308.xml
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160
160
[no value]
[no value]
WATSON E. COLEMAN. Patent Lawyer
[no value]
WATSON E. COLEMAN. Patent Lawyer
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0309.xml
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161
161
[no value]
[no value]
UTAH Radio Products Co.: UTAH
[no value]
UTAH Radio Products Co.
UTAH
[no value]
[no value]
PopularScience_19250201_0106_002_0310.xml
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162
162
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0311.xml
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163
163
[no value]
[no value]
WM. J. MURDOCK COMPANY: Murdock 5-tube Neutrodyne
[no value]
WM. J. MURDOCK COMPANY
Murdock 5-tube Neutrodyne
[no value]
[no value]
PopularScience_19250201_0106_002_0312.xml
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163
163
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0313.xml
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163
163
[no value]
[no value]
C. H. STUART & CO.
[no value]
C. H. STUART & CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0314.xml
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163
163
[no value]
[no value]
W. F. NYE: NYOIL
[no value]
W. F. NYE
NYOIL
[no value]
[no value]
PopularScience_19250201_0106_002_0315.xml
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164
164
[no value]
[no value]
Rauland Mfg. Co.
[no value]
Rauland Mfg. Co.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0316.xml
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165
165
[no value]
[no value]
Advertisements
[no value]
RANDOLPH RADIO CORPORATION
BREMER TULLY 5-Tube Nameless Circuit
RANDOLPH RADIO CORPORATION
NEUTRODYNE RECEIVING SET
RANDOLPH RADIO CORPORATION
SUPER-HETERODYNE
RANDOLPH RADIO CORPORATION
2-Tube Harkness Set
RANDOLPH RADIO CORPORATION
Two Stage Amplifier
RANDOLPH RADIO CORPORATION
Ultra Audion
RANDOLPH RADIO CORPORATION
Reinartz
RANDOLPH RADIO CORPORATION
Randolph Special Headphones
RANDOLPH RADIO CORPORATION
Cockaday Receiving Set
[no value]
[no value]
PopularScience_19250201_0106_002_0317.xml
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166
166,167
[no value]
[no value]
The Barawik Co.
[no value]
The Barawik Co.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0318.xml
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168
168
[no value]
[no value]
Allen-Bradley co.: Bradleydenser
[no value]
Allen-Bradley co.
Bradleydenser
[no value]
[no value]
PopularScience_19250201_0106_002_0319.xml
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169
169
[no value]
[no value]
MIDWEST RADIO CORPORATION: MIRACO ultra5
[no value]
MIDWEST RADIO CORPORATION
MIRACO ultra5
[no value]
[no value]
PopularScience_19250201_0106_002_0320.xml
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170
170
[no value]
[no value]
THE RUDOLPH WURLITZER CO.
[no value]
THE RUDOLPH WURLITZER CO.
[no value]
[no value]
[no value]
PopularScience_19250201_0106_002_0321.xml