Issue: 19211201

Thursday, December 1, 1921
DECEMBER 1921
6
True
99
Monday, January 12, 2015

Articles
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Popular Science
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PopularScience_19211201_0099_006_0001.xml
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Advertisement
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PopularScience_19211201_0099_006_0002.xml
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1
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THE OLIVER TYPEWRITER COMPANY
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THE OLIVER TYPEWRITER COMPANY
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PopularScience_19211201_0099_006_0003.xml
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2
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Southern Cypress Mfrs.' Ass'n.
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Southern Cypress Mfrs.' Ass'n.
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PopularScience_19211201_0099_006_0004.xml
tableOfContents
2
2,5
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TABLE OF CONTENTS
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PopularScience_19211201_0099_006_0005.xml
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3
3
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National Salesmen's Training Association
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National Salesmen's Training Association
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PopularScience_19211201_0099_006_0006.xml
advertisement
4
4
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MICHIGAN STATE AUTOMOBILE SCHOOL
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MICHIGAN STATE AUTOMOBILE SCHOOL
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PopularScience_19211201_0099_006_0007.xml
advertisement
5
5
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Modern Publishing Company
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Modern Publishing Company
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PopularScience_19211201_0099_006_0008.xml
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6
6,8,10,11,12,13,14,15,16,17,18,19
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QUICK-ACTION ADVERTISING
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PopularScience_19211201_0099_006_0009.xml
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7
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Independent Corporation
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Independent Corporation
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PopularScience_19211201_0099_006_0010.xml
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8
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Industrial Correspondence University, Inc.
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Industrial Correspondence University, Inc.
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PopularScience_19211201_0099_006_0011.xml
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8
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Advertisement: Popular Science Monthly
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Popular Science Monthly
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PopularScience_19211201_0099_006_0012.xml
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9
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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PopularScience_19211201_0099_006_0013.xml
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10
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Advertisements
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PopularScience_19211201_0099_006_0014.xml
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11
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McKinlay, Stone & Mackenzie
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McKinlay, Stone & Mackenzie
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PopularScience_19211201_0099_006_0015.xml
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11
11
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CHICAGO CIVIL SERVICE COLLEGE
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CHICAGO CIVIL SERVICE COLLEGE
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PopularScience_19211201_0099_006_0016.xml
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11
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Advertisement: POPULAR SCIENCE MONTHLY
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POPULAR SCIENCE MONTHLY
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PopularScience_19211201_0099_006_0017.xml
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11
11
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GREER · COLLEGE OF AUTOMOTIVE ENGINEERING
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GREER · COLLEGE OF AUTOMOTIVE ENGINEERING
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PopularScience_19211201_0099_006_0018.xml
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12
12
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FREDERICK J. DRAKE & CO.
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FREDERICK J. DRAKE & CO.
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PopularScience_19211201_0099_006_0019.xml
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12
12
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EARLE E. LIEDERMAN
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EARLE E. LIEDERMAN
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PopularScience_19211201_0099_006_0020.xml
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13
13
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THEO. AUDEL & CO.
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THEO. AUDEL & CO.
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PopularScience_19211201_0099_006_0021.xml
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14
14
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AMERICAN SCHOOL
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AMERICAN SCHOOL
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PopularScience_19211201_0099_006_0022.xml
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14
14
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COLUMBIA SCHOOL OF DRAFTING
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COLUMBIA SCHOOL OF DRAFTING
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PopularScience_19211201_0099_006_0023.xml
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Advertisement
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PopularScience_19211201_0099_006_0024.xml
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14
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LaSalle Extension University
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LaSalle Extension University
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PopularScience_19211201_0099_006_0025.xml
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15
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CHICAGO ENGINEERING WORKS INCORPORATED
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CHICAGO ENGINEERING WORKS INCORPORATED
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PopularScience_19211201_0099_006_0026.xml
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16
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American Commerce Association
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American Commerce Association
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PopularScience_19211201_0099_006_0027.xml
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16
16
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Industrial Extension Institute
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Industrial Extension Institute
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PopularScience_19211201_0099_006_0028.xml
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16
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Advertisement
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PopularScience_19211201_0099_006_0029.xml
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16
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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PopularScience_19211201_0099_006_0030.xml
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American Motor School, Inc.
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American Motor School, Inc.
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PopularScience_19211201_0099_006_0031.xml
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17
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The W. L. EVANS SCHOOL OF CARTOONING
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The W. L. EVANS SCHOOL OF CARTOONING
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PopularScience_19211201_0099_006_0032.xml
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17
17
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The American Swedenborg Printing and Publishing Society
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The American Swedenborg Printing and Publishing Society
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PopularScience_19211201_0099_006_0033.xml
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17
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Advertisement
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PopularScience_19211201_0099_006_0034.xml
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Advertisements
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PopularScience_19211201_0099_006_0035.xml
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Advertisements
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PopularScience_19211201_0099_006_0036.xml
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HENRY J. RAHE
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HENRY J. RAHE
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PopularScience_19211201_0099_006_0037.xml
article
21
21,22
AERONAUTICS
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How the World's First Wireless News-Picture Was Flashed Across the Atlantic Ocean
Paris gets President Harding's portrait in twenty minutes
The Miracle Picture of the Year!
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Wilfred S. Ogden
LAST January Popular Science Monthly described the apparatus by which Edouard Bélin had sent photographs by telegraphy. By midsummer M. Bélin had realized improvements predicted in our first article, and was able to undertake transoceanic wirelessing of pictures and handwriting!
PopularScience_19211201_0099_006_0038.xml
article
22
22
INDUSTRIAL PROGRESS
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Machine Ties Parcels as Reaper Binds Grain
Watch for These Features Next Month
Cylinder on Automobile WindShield Contains Sunshade
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ELEVEN years ago J. J. Bachmayer was in the vegetable business. His fingers got so sore tying bunches of onions and radishes, that he determined to invent a parcel-tying machine. A year later he built the first machine out of old junk and bicycle sprocket wheels.
PopularScience_19211201_0099_006_0039.xml
article
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23
NATURAL SCIENCE
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Earth to Plow through Broken Comet's Wreckage
How science explains November meteor shower
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EARTH'S biggest adventure this month will be its collision with a sort of celestial sandbar—a vast, sweeping path through the heavens composed of a lost comet's debris, whose myriad fragments, rushing into our atmosphere at twenty miles a second, will furnish one of the regular November showers of shooting stars.
PopularScience_19211201_0099_006_0040.xml
article
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24,25,111
INDUSTRIAL PROGRESS
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Where the "Last Discoverers" Are Now Seeking New World Riches for Mankind
Earth's few remaining unknown spaces are being "mopped up" by an unprecedented number of explorers
"Mopping Up" Arabia and India
How Little We Really Know
Scientific Research Inspires Explorers
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Ralph R. Perry
WE are living to-day in the greatest period of exploration that the world has ever known. During 1921 hundreds of men have gone forth into the waste spaces of the earth seeking at the risk of their lives new wealth and knowledge for mankind's benefit.
PopularScience_19211201_0099_006_0041.xml
article
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MISCELLANY
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"Civilization Must Abolish War or War Will Destroy Civilization"
Prophetic pictures, based on statements by famous men, show why disarmament is the great international problem
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THE INVASION—"Fleets of fast-moving tanks equipped with tons of liquid gas, against which the enemy will probably have no protection, will cross the frontier and obliterate every living thing in the fields and farms, the villages and cities of the enemy's country.
PopularScience_19211201_0099_006_0042.xml
article
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INDUSTRIAL PROGRESS
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Railroads Use Motor-buses to Improve Service
Motorized equipment now used on short lines is designed to compete with highway buses
This Car Is a Hybrid
Thirty-Six Persons and Baggage
A New Vision of Railroad Service
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The Editor
RAILROAD passengers may soon be riding in a new type of gasoline-driven car which will operate over many short branch lines and interurban routes more cheaply than steam or electric trains. After various makeshift experiments with auto-trucks converted into passenger coaches, the railroads have begun to feel the need of a standardized rail-car that will regain for them their lost short-haul traffic.
PopularScience_19211201_0099_006_0043.xml
article
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INDUSTRIAL PROGRESS
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What Are Your Chances in Radio?
Read these typical romances of four poor boys who found the route to wealth and fame via wireless
A Radio Operator's Perquisites
Cost of Learning Radio
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Armstrong Perry
THE sky is the limit in the radio game. The brief annals of wireless are packed with the names of celebrities and men of wealth who were "just ordinary kids" when the radio bug bit them. Their success is explained by the fact that they grew with the industry—and helped it to grow.
PopularScience_19211201_0099_006_0044.xml
article
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William Dubilier
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FROM East Side schoolboy to millionaire radio engineer in eighteen years—this is the romance of William Dubilier. It all started when, at the age of fifteen, he happened to pick up a book on wireless, by Marconi. He read three hundred pages at one all-night sitting, went to school next day, and that same night attended a lecture on wireless.
PopularScience_19211201_0099_006_0045.xml
article
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Michal Idvorsky Pupin
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PREFERRING citizenship in the land of Washington and Lincoln to a life in Serbia as a general in the army, Michal Pupin sold his schoolbooks and an old watch and started for America. He landed at Castle Garden at the age of sixteen, with five cents left in his pocket, and spent it for a piece of pie.
PopularScience_19211201_0099_006_0046.xml
article
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He Used His Auto Horn to Get Wireless Message
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WHEN Roy A. Weagant was still in short pants and bare feet, he built a telegraph set and cut in on a local circuit in his home town in Canada. A discarded hand generator that fell into his clutches peeved him because he had to turn a crank with one hand in order to produce juice to operate his fearful and wonderful electrical devices.
PopularScience_19211201_0099_006_0047.xml
article
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Sarnoff Tried Every Job from Office Boy to Manager
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"PEOPLE think that if a man gets a big job he must be a wonder. It is not so," says David Sarnoff, once office-boy and now general manager of the Radio Corporation of America. "I came to America from Europe at ten years of age. I did not know a word of English.
PopularScience_19211201_0099_006_0048.xml
article
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MISCELLANY
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Every-Day Wonders
Easy Questions About Familiar Things—Can You Answer Them?
Five Minutes a Day Will Make You Master of These Fundamental Facts of Science
Alcoholic Effects
Frost on the Pane
Height of Clouds
Why are Reservoirs Roofless?
How are Fires Put Out?
Burns from Steam
Freezing of Pipes
The Gas-Meter
When Lamps Smoke
Color of Cloth
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1. When used externally, alcohol makes the body feel cool for the same reason that water does. In each case the liquid evaporates; and since heat is necessary to change a liquid into a gas, the water or the alcohol takes the heat from the body, to which it is closest.
PopularScience_19211201_0099_006_0049.xml
article
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PICTORIAL PAGES
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Railways of Odd Design from All Parts of the World
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PopularScience_19211201_0099_006_0050.xml
article
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SPORTS AND PASTIMES
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Getting Thrills out of Made-to-Order Collisions
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EVEN if you don't own a flivver, you can have the pleasure of running into people. You can experience the sensation of having your automobile struck by another one, or by two or three at a time. The sport is staged in an enclosure paved with sheet steel and with an overhead covering of heavy steel netting.
PopularScience_19211201_0099_006_0051.xml
article
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MOTOR VEHICLES AND ACCESSORIES
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How Heatless Tires Are Made by New Process
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INTERNAL heat, one of the chief causes of tire destruction, is said to be eliminated by the invention of a tire-manufacturing process that embodies seventy-three improvements. Each cord or rope in these tires passed through a machine called the beamer, which takes the place of the more familiar calender in tire manufacture and which coats each strand with an even layer of live rubbber During manufacture the strands sometimes dhere so that before the tread is applied it is necessary to go over the surface of the cords with a steel comb and separate the strands.
PopularScience_19211201_0099_006_0052.xml
article
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MISCELLANY
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Hand Loom Produces Big Cravat Output
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PopularScience_19211201_0099_006_0053.xml
article
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INDUSTRIAL PROGRESS
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Conveyor Handles One Hundred Tons of Flour an Hour
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PopularScience_19211201_0099_006_0054.xml
article
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MISCELLANY
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Space in New York's Canyons in the Panic that Never Happens
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PopularScience_19211201_0099_006_0055.xml
article
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INDUSTRIAL PROGRESS
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Boxes Fall Thirty Feet Unhurt
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TO expedite the handling of heavy cases of canned meat between the packing floor and the shipping platforms an American concern has installed a shaft down which the cases can be dropped over thirty feet without injury. No cushions or spring shock-absorbers are used.
PopularScience_19211201_0099_006_0056.xml
article
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MOTOR VEHICLES AND ACCESSORIES
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For Drawing Wedged Keys in Transmission Shafts
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PopularScience_19211201_0099_006_0057.xml
article
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FOR THE FARMER
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Raising Figs instead of Thistles
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PopularScience_19211201_0099_006_0058.xml
article
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MISCELLANY
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Adding Perspective to the Motion-Picture
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AN interesting experiment has been carried out on motion-pictures by a French scientist in which he has obtained some remarkable effects of depth without the employment of accessories beyond a unique screen. In his researches he discovered accidentally that if two positive views taken from the same negative and identical in every way are placed one on the other and viewed by transmitted light, the human eye distinguishes between the two views and produces an effect of perspective.
PopularScience_19211201_0099_006_0059.xml
article
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MOTOR VEHICLES AND ACCESSORIES
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Auto Crane for Barge Canals
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THIS French automobile crane may give a hint of one way in which the United States may make its barge canals profitable. It has been cheap, if slow, to haul by water, but unloading has been so expensive that few business men use the canals, particularly at way stations, where modern handling equipment was altogether absent.
PopularScience_19211201_0099_006_0060.xml
article
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MISCELLANY
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Elevators that Run on a Curve
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ELEVATORS usually travel perpendicularly, but those that connect the East Boston tunnel with the State Street station run on a curve. Owing to the narrowness of the street at that point it was impossible to build the station directly over the platform in the tunnel, a variance of six and a half feet being necessary.
PopularScience_19211201_0099_006_0061.xml
article
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MISCELLANY
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Polarized Light Reveals Original Work of Artists
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WITH a tube that looks more like a telescope than anything else, M. Lambert, a Paris scientist, accomplishes what seem like miracles with the dingy works of old painters. He has taken paintings that have become darkened with the dust of centuries and with his apparatus has made them appear to the eye as though recently finished.
PopularScience_19211201_0099_006_0062.xml
article
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INDUSTRIAL PROGRESS
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Print 1500 Photographs an Hour
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THE professional photographer who prints negatives by the thousand needs a machine that will do the work quickly. The machine illustrated below has a capacity of fifteen hundred photographs in one hour. It prints from single films, uncut rolls, or glass plates.
PopularScience_19211201_0099_006_0063.xml
article
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MISCELLANY
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A Plate-Glass Fairy-Land
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PopularScience_19211201_0099_006_0064.xml
article
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MISCELLANY
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Giant Outdoor Reflectors for Photographing Movies
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PopularScience_19211201_0099_006_0065.xml
article
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MISCELLANY
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No More Telephone Headbands for Train-Despatchers
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PopularScience_19211201_0099_006_0066.xml
article
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SPORTS AND PASTIMES
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Ukuleles of Steel Will Withstand Hard Usage
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PopularScience_19211201_0099_006_0067.xml
article
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SPORTS AND PASTIMES
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Bumps Help Drive This Bicycle
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PopularScience_19211201_0099_006_0068.xml
article
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MISCELLANY
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Bungalows Made from Discarded Street-Cars
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PopularScience_19211201_0099_006_0069.xml
article
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HOUSEKEEPING MADE EASY
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Holds Lamp-Globes Safely and Insures Quick Removal
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PopularScience_19211201_0099_006_0070.xml
article
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AERONAUTICS
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The Hangar that May Never Have a Tenant
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THE huge hangar built at Lakewood, New Jersey, to house the ill-fated ZR-2 may never have a tenant. Whether or not the catastrophe of America's British-built dirigible will have a dampening effect on the further development of lighter-than-air craft depends on the governmental investigation of the accident.
PopularScience_19211201_0099_006_0071.xml
article
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INDUSTRIAL PROGRESS
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Taking the Guesswork Out of Brass-Rod Cutting
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PopularScience_19211201_0099_006_0072.xml
article
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NATURAL SCIENCE
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California Weed Causes Seventy Punctures a Day
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PopularScience_19211201_0099_006_0073.xml
article
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INDUSTRIAL PROGRESS
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This Portable Lamp-Guard Is Strong but Light
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PopularScience_19211201_0099_006_0074.xml
article
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FOR THE FARMER
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Milk Aerator and Cooler for Small Farmer
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THE milk aerator and cooler invented by Cyrus W. MacKenzie, of Waverley, Indiana, combines extreme simplicity in design, operation, and effectiveness in results. The inventor was a dairyman on a small scale, and found that cooling milk by dipping it up and pouring it back into the can aerated the milk and drove out the animal heat well enough, but took too much time.
PopularScience_19211201_0099_006_0075.xml
article
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HOUSEKEEPING MADE EASY
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Electric Iron Turned Upside Down Forms Stove
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PopularScience_19211201_0099_006_0076.xml
article
40
40
INDUSTRIAL PROGRESS
[no value]
Endless Elevator Loads Truck in One Minute
[no value]
[no value]
[no value]
[no value]
BACK up your truck to the coal, sand, or gravel, pull a lever, and this truck-loading machine starts doing the work of four men. The elevator buckets, arranged on an endless chain, fill themselves at the feeding end and automatically discharge into a hopper at the top of the machine as shown in the picture below.
PopularScience_19211201_0099_006_0077.xml
article
40
40
FOR THE FARMER
[no value]
Testing the Breath of Bananas in Transit
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0078.xml
article
40
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MISCELLANY
[no value]
Graphite Sorted by Primitive Method in Ceylon
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0079.xml
article
41
41
FOR THE FARMER
[no value]
Importing City Lighting for the Country Road
[no value]
[no value]
[no value]
[no value]
EXPERTS declare that a large percentage of night automobile accidents can still be traced to the blinding glare of headlights, in spite of the improved headlight reflectors of many types that are being adopted. To eliminate mishaps from this cause, an experimental installation of highway lighting has been put up on Paradise Road, near Swampscott Massachusetts.
PopularScience_19211201_0099_006_0080.xml
article
41
41
INDUSTRIAL PROGRESS
[no value]
Machine Measures Leather Area
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0081.xml
article
41
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MISCELLANY
[no value]
Fire-Truck Helps Out in Water Famine
[no value]
[no value]
[no value]
[no value]
A THUNDERSTORM that burned out the motors of the pumpin station at Clintonville Wisconsin totally cut off the city's water supply. In the emergency, a fire-truck supplied water service until the repairs could be made. The truck, which was equipped with a five-hundred-gallon pump, was located near the well.
PopularScience_19211201_0099_006_0082.xml
article
41
41
MISCELLANY
[no value]
Gas-Bombs Reduce Rioters to Choking and Tears
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0083.xml
article
41
41
NATURAL SCIENCE
[no value]
The Smallest Ornamental Tree in the World
[no value]
[no value]
[no value]
[no value]
JAPANESE gardeners prune, starve, and potbind trees to dwarf them. Conifers are best liked for this development, as the hard woods are not so tractable. The method of stunting is said to be secret, the heritage of certain families for centuries, but two explanations are offered.
PopularScience_19211201_0099_006_0084.xml
article
42
42
RAILWAYS
[no value]
Completely Automatic Car-Coupler
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0085.xml
article
42
42
INDUSTRIAL PROGRESS
[no value]
Horizontal Forge Press Economizes Space
[no value]
[no value]
[no value]
[no value]
ONE of the features of this horizontal forge press is that it economizes in overhead space, which is sometimes a necessity and always an advantage in small works. The soft metal in molds or matrices gets the full force of 10,000 tons upon it and the forge quickly turns out axles and similar products.
PopularScience_19211201_0099_006_0086.xml
article
42
42
MISCELLANY
[no value]
Inspecting High-Tension Pole Lines
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0087.xml
article
42
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MISCELLANY
[no value]
A New Way to Bob the Hair
[no value]
[no value]
[no value]
[no value]
IT isn't the easiest thing in the world to cut hair so that it will hang evenly all the way round, but with the little guide shown above the hair is trimmed to the proper length. The device is an improvement over the traditional soup-bowl used by our grandmothers for this operation.
PopularScience_19211201_0099_006_0088.xml
article
42
42
MISCELLANY
[no value]
The Tower Bridge in Valve Fittings
[no value]
[no value]
[no value]
[no value]
THIS window-display model of the Tower Bridge in London was made of valves and fittings, with only a postcard view of the original for a guide. In it there are 15,358 pieces taken from regular stock, comprising 230 different kinds of elbows, tees, crosses, nipples, and valves, and 16,251 joints were used to make up the fittings.
PopularScience_19211201_0099_006_0089.xml
article
43
43
PICTORIAL PAGES
[no value]
Primitive Methods Are Still Used by the Japanese in the Manufacture of Silk
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0090.xml
article
44
44
FOR THE FARMER
[no value]
Grading Wheat in Carload Lots
[no value]
[no value]
[no value]
[no value]
HUNDREDS of tests by the Federal Bureau of Markets prove that there is a vital relation between the grade of wheat and the yield of quality flour that can be milled from the grain, but it has been difficult to the point of impossibility to locate a small pocket of low-grade wheat hidden somewhere in the contents of a loaded freight-car.
PopularScience_19211201_0099_006_0091.xml
article
44
44
AERONAUTICS
[no value]
Keeps Airplane Engine from Freezing
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0092.xml
article
44
44
MOTOR VEHICLES AND ACCESSORIES
[no value]
The Tire Is Inside the Rim
[no value]
[no value]
[no value]
[no value]
BASED on an entirely new principle, this patented automobile wheel carries its pneumatic tire inside the rim, where it cannot be punctured or cut. As the illustration shows, the new wheel consists of an outer tire of solid rubber on a flexible metal rim supported by a small, fully inflated pneumatic tire attached to a second rim bolted to the hub.
PopularScience_19211201_0099_006_0093.xml
article
44
44
SPORTS AND PASTIMES
[no value]
Roller Coaster Built by Children
[no value]
[no value]
[no value]
[no value]
THREE of the cleverest boys living on the East Side of New York City conceived the idea of making their own roller coaster from odds and ends found in back lots. The enterprise fitted into the imaginations of other youngsters and soon boxes and boards were collected in sufficient quantity to construct the coaster.
PopularScience_19211201_0099_006_0094.xml
article
45
45
NATURAL SCIENCE
[no value]
Mutilating Plants to Make Them Grow
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0095.xml
article
45
45
INDUSTRIAL PROGRESS
[no value]
Hydrochloric Acid Removes Boiler Scale
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0096.xml
article
45
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INDUSTRIAL PROGRESS
[no value]
This Oil-Tank Was Moved Nine Miles
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0097.xml
article
45
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MISCELLANY
[no value]
Caruso Candle Will Burn in 6921
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0098.xml
article
46
46
INDUSTRIAL PROGRESS
[no value]
The First Large Suspension Bridge to Be Built since 1909
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0099.xml
article
46
46
MISCELLANY
[no value]
Plastometer Reads Person's Ability from Contour of Head
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0100.xml
article
47
47
INDUSTRIAL PROGRESS
[no value]
Pumping a Million Tons of Coal from River-Beds
Susquehanna River takes coal rejected from mines and makes it better than colliery's best
[no value]
[no value]
[no value]
THE Susquehanna is the world's champion "coal-bearing" river. It bears this coal not in strata, but in the lumps and dust that are ejected from Pennsylvania's great anthracite mines. This is "reject" coal, and it is estimated that the rejects from the 350 principal collieries in the state amount to nearly 500,000,000 tons a year, much of which is dumped into streams of various sizes that pass the mines.
PopularScience_19211201_0099_006_0101.xml
article
47
47
AERONAUTICS
[no value]
Farmer's Airplane Rises from Barnyard
[no value]
[no value]
[no value]
[no value]
BUILT with wings that fold back against the fuselage so that the plane may be stored in a Ford garage or any barn that will house a two-horse wagon, this new machine, designed by A. K. Longren, of Topeka, Kansas, may prove the Ford of the air. It is one of the smallest practical airplanes ever constructed.
PopularScience_19211201_0099_006_0102.xml
article
48
48
INDUSTRIAL PROGRESS
[no value]
Basset Process Makes Steel Direct from Ore
[no value]
[no value]
[no value]
[no value]
PRODUCTION of steel direct from the ore in five hours is the revolutionary accomplishment of the French scientist, M. Basset, whose process is now said to be developed on a commercial scale. For years metallurgists have dreamed of a direct steel process, eliminating the spectacular Bessemer converter.
PopularScience_19211201_0099_006_0103.xml
article
48
48
MISCELLANY
[no value]
Printing Our Own Postage Stamps
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0104.xml
article
49
49
PICTORIAL PAGES
[no value]
The Perfume Industry of France
Where the rose, jasmine and cassia are robbed of their odors
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0105.xml
article
50
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MISCELLANY
[no value]
Music Now Comes on the Movie Film
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0106.xml
article
50
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MISCELLANY
[no value]
Enlarged Phonograph as a Vocal Sign-Post
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0107.xml
article
50
50
MISCELLANY
[no value]
Here Are Two Drums in One
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0108.xml
article
50
50
MISCELLANY
[no value]
Grandstand from Ammunition Boxes
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0109.xml
article
50
50
MOTOR VEHICLES AND ACCESSORIES
[no value]
A Homemade Silencer for the Motorcycle
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0110.xml
article
51
51
MISCELLANY
[no value]
Scissors Create Scenery for Silhouette Movies
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0111.xml
article
51
51
INDUSTRIAL PROGRESS
[no value]
Earth-Borer Plants Dynamite
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0112.xml
article
51
51
FOR THE FARMER
[no value]
Rain-Making Machine to Produce Natural Storm
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0113.xml
article
51
51
MISCELLANY
[no value]
Portable Typewriter for the Blind
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0114.xml
article
51
51
RAILWAYS
[no value]
Coal-Pusher Saves Labor of Locomotive Firemen
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0115.xml
article
51
51
INDUSTRIAL PROGRESS
[no value]
New Process Extracts Oil from Apricot Kernels
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0116.xml
article
52
52
SHIPS AND SHIPBUILDING
[no value]
Davit Lowers Lifeboats Quickly
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0117.xml
article
52
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INDUSTRIAL PROGRESS
[no value]
The Diver Can Now Light His Gas Torch under Water
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0118.xml
article
52
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RAILWAYS
[no value]
Odd Trolley-Car to Give Local Service from Express Trains
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0119.xml
article
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INDUSTRIAL PROGRESS
[no value]
Good Lumber Cut from Dead Trees
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0120.xml
article
53
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MISCELLANY
[no value]
What Do You Want to Know?
Let Popular Science Monthly Answer Your Problems in General Science
Other Readers' Questions that Will Interest You Too
[no value]
[no value]
[no value]
No, the material on luminous dials consists of a minute quantity of a radium salt mixed with some phosphorescent substance as sulphide of zinc or barium. Such a combination will glow more in the dark than would radium, which, in its pure state, is not luminous.
PopularScience_19211201_0099_006_0121.xml
article
54
54
HOUSEKEEPING MADE EASY
[no value]
An Open Fire without Smoke and Dirt
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0122.xml
article
54
54
MISCELLANY
[no value]
Wooden Tone-Arm for Use on Phonographs
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0123.xml
article
54
54
INDUSTRIAL PROGRESS
[no value]
Rapid Interest Indicator for Savings-Banks
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0124.xml
article
54
54
MISCELLANY
[no value]
A Country Estate Built on a Factory Roof
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0125.xml
article
54
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MISCELLANY
[no value]
Rotary Photo-Print Trimmer
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0126.xml
article
54
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INDUSTRIAL PROGRESS
[no value]
Contractor's Truck Carries Double Hoppers
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0127.xml
article
55
55
INDUSTRIAL PROGRESS
[no value]
A Hand-Power Drill for Prospectors
[no value]
[no value]
[no value]
[no value]
FOR over eight years John M. Calder-wood sought to invent a mining-drill that would give the prospectors of the West the benefits of power drilling by a machine light enough to carry over desert country on the back of a burro and easier and more efficient in operation than the laborious hand-drilling incident to the use of single and double jack-hammers.
PopularScience_19211201_0099_006_0128.xml
article
55
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NATURAL SCIENCE
[no value]
Every Pebble a Hemisphere of Ice and Life
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0129.xml
article
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MISCELLANY
[no value]
Primitive Canoe Built of Inflated Skins
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0130.xml
article
55
55
SHIPS AND SHIPBUILDING
[no value]
A Million Dollars Lost if This Lamp Goes Out
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0131.xml
article
55
55
SHIPS AND SHIPBUILDING
[no value]
Bulges on Cruiser's Sides Protect against Torpedoes
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0132.xml
article
56
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MISCELLANY
[no value]
Power House Starts when Light Is Turned On
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0133.xml
article
56
56
INDUSTRIAL PROGRESS
[no value]
Fast Grinding Compound now Used for Bearings
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0134.xml
article
56
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MISCELLANY
[no value]
House-Moving in the Philippines
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0135.xml
article
56
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FOR THE FARMER
[no value]
Ventilated Apartments Are the Style for Song-Birds
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0136.xml
article
56
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AERONAUTICS
[no value]
Dirigible Directs Land Traffic by Radiophone
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0137.xml
article
57
57
HOUSEKEEPING MADE EASY
[no value]
Baby's Bath with All the Latest Improvements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0138.xml
article
57
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NATURAL SCIENCE
[no value]
Animal Life in the Sky
[no value]
[no value]
[no value]
[no value]
EXAMINATION of many specimens of meteorites has revealed the presence in them of living organisms. On being placed in the laboratory under suitable breeding conditions, the samples came to life and multiplied. Further study of these micro-organisms will go a long way in verifying the claims of certain scientists as to the animal life existing in other worlds.
PopularScience_19211201_0099_006_0139.xml
article
57
57
FOR THE FARMER
[no value]
Wind Creates Natural Draft for Sawdust Incinerator
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0140.xml
article
57
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MISCELLANY
[no value]
Movies Now Carry Their Own Power Plant
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0141.xml
article
57
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MISCELLANY
[no value]
Street Stations for First Aid
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0142.xml
article
57
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INDUSTRIAL PROGRESS
[no value]
Separates Liquids from Soil
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0143.xml
article
58
58,59
INDUSTRIAL PROGRESS
[no value]
Centrifugal Force—the Energy that Snaps the Whip and Dries the Clothes
How terrific destructive power is usefully applied in industry
It Made White Sugar Possible
For Separating Liquids
Freeing Compressed Air from Moisture
[no value]
[no value]
[no value]
"GO Slow—Dangerous Curve Ahead" warns the sign by the roadside, but if it were made to say what it really means, it would read, "Look out for centrifugal force," for that is the mechanical principle which causes most of the accidents along the highways.
PopularScience_19211201_0099_006_0144.xml
article
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MISCELLANY
[no value]
Ho To Be Measured for a Set of False Teeth
[no value]
[no value]
[no value]
[no value]
A GAGE for measuring artificial teeth has been devised by Dr. William C. Darbey, of Shanghai, China. It consists of a horizontal bar that is rested on the head of the patient, and two depending bars, each of which carry measurement markings on their lower portions. These bars are pivoted to the horizontal bar, and one of them may be slipped along this member to adapt the instrument to persons having faces of different degrees of fullness.
PopularScience_19211201_0099_006_0145.xml
article
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MISCELLANY
[no value]
Tropical Lineman Has Hard Job
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0146.xml
article
59
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MISCELLANY
[no value]
Submarine Mine-Sweeper Enters the Movies
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0147.xml
article
60
60
MISCELLANY
[no value]
Identifying Criminals by Their Pores
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0148.xml
article
60
60
INDUSTRIAL PROGRESS
[no value]
This Machine Measures Wire of Any Size
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0149.xml
article
60
60
NATURAL SCIENCE
[no value]
Fossil Shark Could Swallow Small Whale
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0150.xml
article
61
61
AERONAUTICS
[no value]
England Designs Battleplane to Carry 12-Inch Gun
Weapon with no recoil is to be built into fuselage
[no value]
[no value]
P. J. Risdon
[no value]
PopularScience_19211201_0099_006_0151.xml
article
62
62
PICTORIAL PAGES
[no value]
Tools and Machines that Are Money-Savers in the Shop
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0152.xml
article
63
63
SPORTS AND PASTIMES
[no value]
Remote Control of Clay-Pigeon Traps
[no value]
[no value]
[no value]
Capt. Edward C. Crossman
AN automatic clay-bird trap that is entirely different from anything made in this country is revealed in photographs of the first trap-shoot held at the Halen See shooting grounds, near Berlin. In American parlance, an automatic trap means one that is set and pulled from the firing-line, the person in the pit merely loading it for each bird thrown, and also changing the direction of the trap from bird to bird.
PopularScience_19211201_0099_006_0153.xml
article
63
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FOR THE FARMER
[no value]
Paper Pulp, Dyes, and Alcohol from Waste Corncobs
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0154.xml
article
63
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MISCELLANY
[no value]
Another Scale Pest Makes Its Appearance
[no value]
[no value]
[no value]
[no value]
THIS time it is New Orleans and the surrounding territory that is the camping-ground for a new pest. It is called the "camphor scale," but it has no compunctions against other trees such as the citrus, oak, and fig trees. Just how or when the pest got into the United States is not known, but observations of its speed in spreading has led entomologists to believe that it arrived during the past year.
PopularScience_19211201_0099_006_0155.xml
article
64
64
MISCELLANY
[no value]
Motion-Pictures Can Be Shown without Darkening Theater
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0156.xml
article
64
64
MISCELLANY
[no value]
Safety-Pin for Milk-Cans
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0157.xml
article
64
64
RAILWAYS
[no value]
Railway-Cars that Unload Automatically
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0158.xml
article
64
64
MISCELLANY
[no value]
Cow-Punchers Use Modern Mess-Wagon
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0159.xml
article
64
64
MISCELLANY
[no value]
New Flashlight Has Three-Hundred-Foot Range
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0160.xml
article
65
65
SPORTS AND PASTIMES
[no value]
Can You Get These Eye-Testers Right in Less than a Minute?
[no value]
[no value]
[no value]
[no value]
HOW quick are your eyes? How alert are your brain cells? Do illusions fool you? Find out by trying these famous intelligence tests. They will make instructive recreation for a winter evening's gathering. Pass around slips of paper with spaces numbered 1, 2, 3, and 4. Let each person jot down in these spaces the answers to the questions contained in the numbered captions.
PopularScience_19211201_0099_006_0161.xml
article
65
65
RAILWAYS
[no value]
The Engineer Gets His Orders
[no value]
[no value]
[no value]
[no value]
THIS ingenious mechanical contrivance is used to deliver orders between the locomotive engineers and the switchmen as the trains of the Midland & Great Northern Railway in England enter a section of single track running between Spalding and Lynn.
PopularScience_19211201_0099_006_0162.xml
article
65
65
MISCELLANY
[no value]
Making Heat Instantly with Chemicals
[no value]
[no value]
[no value]
[no value]
A METAL hot-water bag that contains no hot water but that is heated by admitting air to a chemical compound contained inside the case is now on the market. Its action is extremely simple. When the stopper is unscrewed for a fraction of a second, the bottle becomes warm, and will remain so for from eight to twelve hours.
PopularScience_19211201_0099_006_0163.xml
article
65
65
FOR THE FARMER
[no value]
Seed Potatoes Cut by Machine
[no value]
[no value]
[no value]
[no value]
IT is no small job cutting up seed potatoes for planting on a big truck-farm, but a great deal of labor is eliminated by a machine recently devised by John O. Jacobson, of Nielsville, Minnesota. A plunger pushes one potato at a time against a cross-shaped stationary cutter.
PopularScience_19211201_0099_006_0164.xml
article
66
66
MISCELLANY
[no value]
Measuring and Recording Rain- and Snow-Fall
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0165.xml
article
66
66
INDUSTRIAL PROGRESS
[no value]
Blasting-Fuses Cut to Safe Measure by Machine
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0166.xml
article
66
66
MISCELLANY
[no value]
Sword-Swallowing Made Possible
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0167.xml
article
66
66
INDUSTRIAL PROGRESS
[no value]
Combined Handle-Bar and Package-Carrier
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0168.xml
article
66
66
MISCELLANY
[no value]
Huge Battery of Flood Lights Illuminates Skyscraper
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0169.xml
article
66
66
MISCELLANY
[no value]
The Saidy Date Must Go to Quarantine
[no value]
[no value]
[no value]
[no value]
EARLY in 1920, Professor S. C. Mason, of the Bureau of Plant Industry, went to Egypt to get offshoots of the Saidy date, for the purpose of experimenting with its growth in the United States. The Professor brought back about eighteen hundred offshoots—from the Libyan Desert, the neighborhood of Cairo, and the Nile valley.
PopularScience_19211201_0099_006_0170.xml
article
67
67
HOUSEKEEPING MADE EASY
[no value]
Electricity Heats Water as It Passes through Faucet
[no value]
[no value]
[no value]
[no value]
BY means of an electric resistance coil nearly a foot long placed in the center of the water-pipe, this faucet will supply hot water at the rate of thirty gallons an hour. Its action is instantaneous, and there are no switches to turn, since moving the faucet handle to the left starts the electric current.
PopularScience_19211201_0099_006_0171.xml
article
67
67
MISCELLANY
[no value]
Bamboo Clock Tells the Day, Week, Month, and Year
[no value]
[no value]
[no value]
[no value]
EVEN the springs and the wheels of this eight-day pendulum clock were carved from bamboo with a penknife. With the exception of a ten-pound leaden weight which operates it and two small glasses which serve as gongs, the entire mechanism is constructed of cane such as is found in the ordinary bamboo fishing-pole.
PopularScience_19211201_0099_006_0172.xml
article
67
67
INDUSTRIAL PROGRESS
[no value]
Machine Makes Five Operations on One Piece of Work
[no value]
[no value]
[no value]
[no value]
THIS is another time-saving machine that will do as many as five operations on one piece of work. Five revolving tables are provided with vises. Each of the five vises holds a tool for a certain operation; such as reaming, drilling, countersinking, or tapping.
PopularScience_19211201_0099_006_0173.xml
article
67
67
MISCELLANY
[no value]
Pockets for Woman—in Her Hat!
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0174.xml
article
67
67
MISCELLANY
[no value]
Combination Chair and Umbrella Makes Artists More Comfortable
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0175.xml
article
68
68
FOR THE FARMER
[no value]
Simple Homemade Sterilizer for the Dairyman
[no value]
[no value]
[no value]
[no value]
A ROASTING-PAN, a galvanized iron cover with a spout soldered in the center, a metal box, and an oilstove—all articles which can be bought at any hardware store or easily constructed at home —comprise a complete outfit for sterilizing dairy utensils by steam.
PopularScience_19211201_0099_006_0176.xml
article
68
68
MISCELLANY
[no value]
Spectroscope Detects Minute Bloodstains
[no value]
[no value]
[no value]
[no value]
BY the newest spectroscopic methods of analysis, one five hundred thousandth part of a drop of blood on a criminal's clothing is enough to convict him of murder. With the new system perfected by Professor Florence, of Lyons, France, the smaller the amount of blood, the more certain and easy is its recognition.
PopularScience_19211201_0099_006_0177.xml
article
68
68
INDUSTRIAL PROGRESS
[no value]
Write a Personal Message by Telephone
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0178.xml
article
69
69
Odd Items of Interest from Around the World
[no value]
Indian Folk-Songs Are Preserved by the Government
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0179.xml
article
69
69
Odd Items of Interest from Around the World
[no value]
Dark Stranger Appears in Space
[no value]
[no value]
[no value]
[no value]
AN astounding discovery by a Dutch scientist of a heavenly body twenty million times larger than the sun has introduced a new factor into astronomical circles. It is thought that the body is a huge cloud of dust that will eventually become a star.
PopularScience_19211201_0099_006_0180.xml
article
69
69
Odd Items of Interest from Around the World
[no value]
Man-Propelled Trolley in East Africa
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0181.xml
article
69
69
Odd Items of Interest from Around the World
[no value]
No Contest to Occupy This White House
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0182.xml
article
69
69
Odd Items of Interest from Around the World
[no value]
Moving Roadway for Japan
[no value]
[no value]
[no value]
[no value]
JIROZAKA Hill in Yokohama, Japan, separates the exclusive foreign colony from the shopping district and presents a serious obstacle to motor-cars and ricksha men. The city authorities have been asked for permission to construct a moving roadway leading over the hill.
PopularScience_19211201_0099_006_0183.xml
article
69
69
Odd Items of Interest from Around the World
[no value]
Delivering Beer with a Hose
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0184.xml
article
69
69
Odd Items of Interest from Around the World
[no value]
Shallow Draft Towboat for the Mississippi
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0185.xml
article
70
70,71
PICTORIAL PAGES
[no value]
From Ore to Capsule— The History of Radium
Striking picture of the little known process of refining six hundred tons of ore to a gram of radium
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0186.xml
article
70
70
MISCELLANY
[no value]
Film-Projector and Screen in the Same Cabinet
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0187.xml
article
70
70
MISCELLANY
[no value]
Rolling Desk for the Use of Crippled Children
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0188.xml
article
71
71
MISCELLANY
[no value]
Purdue Has World's Largest Bass Drum
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0189.xml
article
71
71
SHIPS AND SHIPBUILDING
[no value]
Pontoons to Replace Ferries
[no value]
[no value]
[no value]
[no value]
PONTOON bridges across Lake Washington have been proposed to relieve congestion on the ferries of Seattle. Fifteen wooden vessels constructed for the United States Shipping Board would be used as floats, and upon them an eighteen-foot roadway and two four-foot sidewalks would be constructed.
PopularScience_19211201_0099_006_0190.xml
article
71
71
MISCELLANY
[no value]
Renews Blotting Surface after Each Operation
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0191.xml
article
72
72
FOR THE FARMER
[no value]
Shoes for Equine Bog-Trotters
[no value]
[no value]
[no value]
[no value]
A ROUNDED wooden plank about one inch thick, fitted with staples and springs that fasten it firmly to a horse's hoof, has proved useful when teams must be driven over soft bogs or loose sand. The horse puts his foot in the center of the plank, and when the clamps are fastened as indicated in the illustration, he may walk wherever he chooses without sinking into the soft soil.
PopularScience_19211201_0099_006_0192.xml
article
72
72
MISCELLANY
[no value]
Curtain of Water Safeguards Books
[no value]
[no value]
[no value]
[no value]
EXTERNAL sprinkler systems have been installed along the eaves of the Chicago Public Library to protect the priceless volumes in the building from the danger of fire. In case a blaze starts in any of the structures near by, a wall of water falls from the roof of the library, extinguishing flying sparks and protecting the building against heat and smoke.
PopularScience_19211201_0099_006_0193.xml
article
72
72
MISCELLANY
[no value]
Disk Improves Phonograph Tone
[no value]
[no value]
[no value]
[no value]
CLEARER tone, a purer musical quality, and the total elimination of all scratching and scraping noises are claimed for this phonograph attachment. It consists of a round ball into which the needle fits, with only about a thirty-second of an inch of the tip protruding.
PopularScience_19211201_0099_006_0194.xml
article
72
72
MISCELLANY
[no value]
Hand Fire-Extinguisher Uses No Liquid
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0195.xml
article
72
72
INDUSTRIAL PROGRESS
[no value]
Building-Blocks Made on Continuous Molder
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0196.xml
article
73
73
PICTORIAL PAGES
[no value]
How to Get the Most from Your Bit
No. 2 in a series showing How to Use and Care for Tools
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0197.xml
article
73
73
SPORTS AND PASTIMES
[no value]
Bicycle Steers from the Rear
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0198.xml
article
73
73
[no value]
[no value]
Why Do We Do It?
Why do we run the engine with the garage door tightly closed?
WHAT DO YOU DO
[no value]
[no value]
[no value]
EXHAUST gases from an automobile contain a large percentage of poisonous carbon monoxide —the fatal "fire damp" so dreaded by miners. When a cold engine is warmed up inside the garage, with the doors and windows tightly closed, enough of this gas is produced to constitute a serious fire risk and danger of explosion.
PopularScience_19211201_0099_006_0199.xml
article
73
73
MISCELLANY
[no value]
Plowing with a Street-Car
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0200.xml
article
74
74
MISCELLANY
[no value]
Try These Speed Indicators on Your Mental Gears
A Course in Quick Thinking
Lighting the Boulevard
$25 In Prizes
A Practical Referee Settles the Question
How Much Was Offered?
When Were the Cars Nearest Together?
[no value]
[no value]
Sam Loyd
AFTER the trustees of a small township had voted an appropriation to provide for a fixed number of electric-light poles to skirt the main highway through their bailiwick, the Ways and Means Committee made a report to the effect that if the poles were set 440 yards apart, as had been suggested, they would need three more poles, whereas if they were erected three quarters of a mile apart, there would be three poles left over.
PopularScience_19211201_0099_006_0201.xml
article
75
75
PICTORIAL PAGES
[no value]
For the Comfort and Convenience of the Family
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0202.xml
article
76
76
MOTOR VEHICLES AND ACCESSORIES
[no value]
He Gave the World an Improved Battery
Newly invented process reduces weeks to seconds in forming battery plates
[no value]
[no value]
[no value]
A FUNDAMENTAL improvement in battery manufacture that reduces the time required to form a lead plate from weeks to seconds has been made byPedro G. Salom, of Philadelphia, for thirty-five years a prominent figure in the manufacture of storage batteries. The new battery is not only cheaper in cost, but it will increase the voltage 5 per cent over that possible with "pasted" battery plates, and will enlarge the capacity more than 25 per cent.
PopularScience_19211201_0099_006_0203.xml
article
76
76
MOTOR VEHICLES AND ACCESSORIES
[no value]
A Jeweler's Idea of Car-Building
[no value]
[no value]
[no value]
[no value]
WHEN a Fifth Avenue jeweler adopts automobile-body building as an avocation, the result is likely to show the effect of his professional love of fine finish and beauty of line. As the illustration shows, the jeweler has left the beaten paths of motor-car design.
PopularScience_19211201_0099_006_0204.xml
article
76
76
MOTOR VEHICLES AND ACCESSORIES
[no value]
Vacuum Cleaner for Automobile
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0205.xml
article
77
77
MOTOR VEHICLES AND ACCESSORIES
[no value]
New Steam-Car Has Engines on Rear Wheels
[no value]
[no value]
[no value]
[no value]
THE thousand-dollar steam-car is now in process of production. It is an attractive, five-passenger machine of conservative design. The boiler is placed under the hood, with the engine located in the rear axle, where it takes the place of the usual differential mechanism.
PopularScience_19211201_0099_006_0206.xml
article
77
77
MOTOR VEHICLES AND ACCESSORIES
[no value]
Fan-Belt Drives Tire-Pump
[no value]
[no value]
[no value]
[no value]
SOMETHING new in automobile accessories is a rotary power-driven tire-pump that occupies less room in the toolbox than the ordinary hand pump. The pump consists of a wheel that is rotated against the fan-belt and which is the cylinder of the pump.
PopularScience_19211201_0099_006_0207.xml
article
77
77
MOTOR VEHICLES AND ACCESSORIES
[no value]
Keep Axle Grease off the Brakes
[no value]
[no value]
[no value]
[no value]
THE grease in the axles of Ford and Chevrolet cars will often work out through the axle housing on to the brakes. If this should happen through wear of the axle parts, the trouble may be eliminated by a new device made especially for the two makes of cars mentioned.
PopularScience_19211201_0099_006_0208.xml
article
77
77
MOTOR VEHICLES AND ACCESSORIES
[no value]
Odd Safety Signal on Fender
[no value]
[no value]
[no value]
[no value]
AN automobile safety signal that operates on the principle of visible indications by means of illuminated cross-arms has been tested and approved by boards of safety of at least one large city. The signal takes the shape of a Maltese cross with a light-bulb in each arm and in the center.
PopularScience_19211201_0099_006_0209.xml
article
78
78
PICTORIAL PAGES
[no value]
Automobile Accessories
[no value]
[no value]
[no value]
[no value]
AS a Special Service to Readers the Editor will be glad to furnish the names of firms manufacturing the interesting devices and accessories for motor-cars illustrated on these pages.
PopularScience_19211201_0099_006_0210.xml
article
79
79
[no value]
[no value]
When You Want Expert Advice About Your Car
[no value]
[no value]
[no value]
[no value]
IN these six pages of ideas about automobiles and motor-trucks Popular Science Monthly endeavors to help its readers solve problems of maintenance and repair. But there must be special cases that are not covered, and we invite you to write to the Automobile Editor and let him advise you.
PopularScience_19211201_0099_006_0211.xml
article
80
80,81
MOTOR VEHICLES AND ACCESSORIES
[no value]
Why I Believe You Should Buy a New Car
[no value]
[no value]
[no value]
[no value]
IF I were to buy another car now, I should buy a new one, just as I bought a new one the last time, and the time before. I get far more satisfaction out of a new car than I could possibly get out of the amount of money I might save by buying an older one. But my real reason for purchasing a new car would be a utilitarian one.
PopularScience_19211201_0099_006_0212.xml
article
81
81
[no value]
[no value]
Write to Us About Your Motor Troubles
If you have a motor-truck or automobile problem, let the Automobile Editor solve it
Advice to New Driver
Horsepower Formula
When Building a Garage
Blowouts at High Speed
[no value]
[no value]
[no value]
Q.—I have just taken delivery on my first car. What advice can you give me regarding driving or care of it?—G. A. M., Tallahassee, Florida. A.—As to driving, be twice as careful under all circumstances as you think that you ought to be. Keep your eyes open and use your imagination.
PopularScience_19211201_0099_006_0213.xml
article
82
82
FOR THE FARMER
[no value]
Build a Homemade Water-Pump
[no value]
[no value]
[no value]
W. A. Logan
[no value]
PopularScience_19211201_0099_006_0214.xml
article
82
82
MOTOR VEHICLES AND ACCESSORIES
[no value]
Adjust Radius or Torque Rods to Prevent Skidding
[no value]
[no value]
[no value]
G. A. LUERS
[no value]
PopularScience_19211201_0099_006_0215.xml
article
82
82
MOTOR VEHICLES AND ACCESSORIES
[no value]
Device for Spreading the Springs of Automobiles
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0216.xml
article
82
82
FOR THE FARMER
[no value]
Let Your Ford Help in the Farm Work
[no value]
[no value]
[no value]
E. A. MESSLER
[no value]
PopularScience_19211201_0099_006_0217.xml
article
82
82
MOTOR VEHICLES AND ACCESSORIES
[no value]
Special Tool for Wing-Nuts and Petcocks
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0218.xml
article
82
82
[no value]
[no value]
Were You a Gipsy-Motorist This Summer?
[no value]
[no value]
[no value]
[no value]
DID you answer the call of the open road this year? Did the running-boards of the "old bus" groan beneath their loads of tenting, bedding, eatables, and utensils? Tell us how much your trip cost, where and by what route you went, what big lessons you learned that will help others make plans for a similar vacation next year, and, finally, what automobile, camping equipment you purchased or improvised.
PopularScience_19211201_0099_006_0219.xml
article
83
83
MOTOR VEHICLES AND ACCESSORIES
[no value]
Shop Tire-Rack for Tubes and Casings
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0220.xml
article
83
83
MOTOR VEHICLES AND ACCESSORIES
[no value]
Auxiliary Wind-Shield for the Automobile
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0221.xml
article
83
83
Keep Your Home Shipshape
[no value]
Fire-Extinguishers for Use in the Home
[no value]
[no value]
[no value]
E. A. MCCANN
[no value]
PopularScience_19211201_0099_006_0222.xml
article
83
83
Keep Your Home Shipshape
[no value]
Softening Sponges without Injuring Them
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0223.xml
article
83
83
Keep Your Home Shipshape
[no value]
Simple First Aid for the Alarm-Clock
[no value]
[no value]
[no value]
F. M. WESTON
[no value]
PopularScience_19211201_0099_006_0224.xml
article
83
83
Keep Your Home Shipshape
[no value]
How to Make a Cracked Bottle Watertight
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0225.xml
article
83
83
Keep Your Home Shipshape
[no value]
Putty Substitutes for Use in the House
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0226.xml
article
83
83
Keep Your Home Shipshape
[no value]
Plugging Up the Nicks in Old Furniture
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0227.xml
article
84
84,85
The Home Workshop
New and Useful Things for the Practical Man to Make
A Simple Radio Receiver for Everybody
COIL DIMENSIONS, ETC.
CONDENSER TABLE
[no value]
[no value]
Arnold Holmes
IN these times, when the Bureau of Markets is broadcasting daily reports of market conditions from a chain of stations all over our country, the naval stations are sending out weather and navigation reports, some commercial companies are operating radiophone stations, and thousands of amateurs are using both the radiophone and the radiograph, it behooves a good many of us to build receiving-sets, get into the game, and receive some of this valuable and interesting free information.
PopularScience_19211201_0099_006_0228.xml
article
85
85
The Home Workshop
[no value]
How to Make a Pair of Delicate Balances
[no value]
[no value]
[no value]
Bert Rodson
TO construct with ordinary tools and from ordinary material a pair of chemical balances that will weigh the ink on this sheet of paper is not at all hard or impossible. So delicate a pair can be constructed easily from 4 ft. of No. 10 iron wire, 4 ft. of No. 16 iron wire, 4 phonograph needles, some small strips of 1/16-in. brass, and 3 small blocks of wood.
PopularScience_19211201_0099_006_0229.xml
article
86
86
The Home Workshop
[no value]
Useful and Attractive Ornaments from Carved Clay
[no value]
[no value]
[no value]
E. Bade
BEAUTIFUL as well as useful articles can be made of carved clay. The clay must be soft, like talcum, and under no conditions should it be gritty. A gritty clay is difficult to carve. The purer the clay the easier it is to work. It should have the least amount of foreign material in it.
PopularScience_19211201_0099_006_0230.xml
article
86
86
The Home Workshop
[no value]
Moving Shadow-Pictures on the Screen Are Amusing
[no value]
[no value]
[no value]
[no value]
HAWAIIAN dancers, dancing animals, etc., shown in motion as shadowgraphs on a screen will form an attractive entertainment for children's Christmas parties. The figures of the dancers or romping animals are drawn on heavy manila wrapping-paper and carefully cut out.
PopularScience_19211201_0099_006_0231.xml
advertisement
87
87
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[no value]
Advertisement
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PopularScience_19211201_0099_006_0232.xml
advertisement
88
88
[no value]
[no value]
BUESCHER BAND INSTRUMENT CO.
[no value]
BUESCHER BAND INSTRUMENT CO.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0233.xml
article
88
88
The Home Workshop
[no value]
Build Your Own Air-Driven Sled
[no value]
[no value]
[no value]
P. P. Avery
GOOD looking as is this homemade ice-flyer, it is not expensive, as it can be made from used parts that a mechanic always has lying around his workshop. Its novelty and speed will make a strong appeal to all lovers of outdoor sport. And now for the construction.
PopularScience_19211201_0099_006_0234.xml
advertisement
89
89
[no value]
[no value]
MECCANO COMPANY INCORPORATED
[no value]
MECCANO COMPANY INCORPORATED
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0235.xml
article
90
90
The Home Workshop
[no value]
About the Care of Dry Cells in the Country
[no value]
[no value]
[no value]
A. J. Christopher
DRY cells, whether for one purpose or another, are used in almost every country place. They make the spark that lights your gas and runs your engine, they ring your doorbell, operate the burglar alarm, and perform other duties too numerous to mention.
PopularScience_19211201_0099_006_0236.xml
article
90
90
The Home Workshop
[no value]
Oil-Filter for the Farm or Shop
[no value]
[no value]
[no value]
L. M. JORDAN
[no value]
PopularScience_19211201_0099_006_0237.xml
article
90
90
The Home Workshop
[no value]
Shopmade Speed Wrench of Simple Construction
[no value]
[no value]
[no value]
[no value]
A SIMPLE form of jointed speed wrench for a small shop is worth duplicating, being of especial advantage in getting around almost any form of interference due to pumps, wires, and pipes. This wrench is not used to start or finish the bolt turning, but is for the express purpose of spinning them off.
PopularScience_19211201_0099_006_0238.xml
article
91
91
The Home Workshop
[no value]
Christmas-Tree Candle-Holders that Always Hang Vertically
[no value]
[no value]
[no value]
LOUISA A. CAPPEL
[no value]
PopularScience_19211201_0099_006_0239.xml
article
91
91
The Home Workshop
[no value]
Build Your Woodbox Under the Stairs
[no value]
[no value]
[no value]
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[no value]
PopularScience_19211201_0099_006_0240.xml
advertisement
91
91
[no value]
[no value]
THE PEPSODENT COMPANY
[no value]
THE PEPSODENT COMPANY
[no value]
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[no value]
PopularScience_19211201_0099_006_0241.xml
advertisement
92
92
[no value]
[no value]
American Technical Society
[no value]
American Technical Society
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0242.xml
article
92
92
The Home Workshop
[no value]
New Prize Contest
“How I Made Money with My Tools”
$90 in Prizes
Conditions of the Contest
[no value]
[no value]
[no value]
HAVE you ever made extra money with your tools? If you have, we want to know just how you did the trick. If you constructed something, describe it. If there is a particular job that you do, let us know what it is. For instance, we have heard of a chap who mends furniture in his neighborhood during his spare time.
PopularScience_19211201_0099_006_0243.xml
article
92
92
The Home Workshop
[no value]
Bench-Hook and End-Wood Planing Device
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0244.xml
advertisement
93
93
[no value]
[no value]
STRUCTO MFG. CO.
[no value]
STRUCTO MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0245.xml
advertisement
94
94
[no value]
[no value]
University of Applied Science
[no value]
University of Applied Science
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0246.xml
advertisement
94
94
[no value]
[no value]
Advertisement
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PopularScience_19211201_0099_006_0247.xml
article
94
94
The Home Workshop
[no value]
A Boring Table for the Small Lathe
[no value]
[no value]
[no value]
H. H. PARKER
A BORING or milling table is a useful accessory to the small lathe and the illustrations show how one may be made and fitted to the lathe cross-slide, using the original cross-feed screw. No planer or shaper work is required as all work is performed either in the lathe itself or on the bench.
PopularScience_19211201_0099_006_0248.xml
article
94
94
The Home Workshop
[no value]
Piping the Flow of a Spring
[no value]
[no value]
[no value]
B. F. DASHIELL
[no value]
PopularScience_19211201_0099_006_0249.xml
advertisement
95
95
[no value]
[no value]
MINNESOTA PEN CO.
[no value]
MINNESOTA PEN CO.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0250.xml
advertisement
96
96
[no value]
[no value]
THE RUDOLPH WURLITZER CO.
[no value]
THE RUDOLPH WURLITZER CO.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0251.xml
article
96
96
The Home Workshop
[no value]
How to Make and Furnish a Doll's House
“Every-Day Wonders”
[no value]
[no value]
E. Bade
[no value]
PopularScience_19211201_0099_006_0252.xml
article
97
97
The Home Workshop
[no value]
Wood Puzzles that Will Interest Your Friends
[no value]
[no value]
[no value]
E. A. McCANN
[no value]
PopularScience_19211201_0099_006_0253.xml
article
97
97
The Home Workshop
[no value]
Do You Know How to Make a Glue-Joint Invisible
[no value]
[no value]
[no value]
E. A. McCANN
WHEN making a glue joint, always, if possible, lightly sandpaper the joint before the glue dries. This will fill up any slight crack with fine sawdust and greatly aid in hiding the joint.
PopularScience_19211201_0099_006_0254.xml
advertisement
97
97
[no value]
[no value]
AMERICAN TELEPHONE AND TELEGRAPH COMPANY AND ASSOCIATED COMPANIES
[no value]
AMERICAN TELEPHONE AND TELEGRAPH COMPANY AND ASSOCIATED COMPANIES
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0255.xml
advertisement
97
97
[no value]
[no value]
W. H. PHIPPS CO.
[no value]
W. H. PHIPPS CO.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0256.xml
advertisement
97
97
[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_19211201_0099_006_0257.xml
advertisement
97
97
[no value]
[no value]
SLINGERLAND SCHOOL OF MUSIC, Inc.
[no value]
SLINGERLAND SCHOOL OF MUSIC, Inc.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0258.xml
advertisement
98
98
[no value]
[no value]
INTERNATIONAL CORRESPONDENCE SCHOOLS
[no value]
INTERNATIONAL CORRESPONDENCE SCHOOLS
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0259.xml
advertisement
98
98
[no value]
[no value]
Burlington Watch Company
[no value]
Burlington Watch Company
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0260.xml
article
98
98
The Home Workshop
[no value]
To Prevent Breaking a Small Drill
First Prize, “Best Idea” Contest, December
[no value]
[no value]
Albert Strandin
[no value]
PopularScience_19211201_0099_006_0261.xml
article
98
98
The Home Workshop
[no value]
This Boiler-Baker Is a Boon to Housewives
Second Prize, “Best Idea” Contest, December
[no value]
[no value]
Roland B. Cutler
[no value]
PopularScience_19211201_0099_006_0262.xml
article
98
98
The Home Workshop
[no value]
$75 in Prizes Each Month for the Best New Ideas
Prize-Winners for December
[no value]
[no value]
[no value]
A FIRST prize of $50 and a second prize of $25 will be awarded every month to the authors of the two best articles appearing in this department. Every article submitted will be considered as a possible prize-winner. Those which do not win prizes may be purchased at space rates.
PopularScience_19211201_0099_006_0263.xml
article
99
99
The Home Workshop
[no value]
Improved Spur for Stump-Boring Auger
[no value]
[no value]
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BECAUSE of the fact that when one is boring a hole in a stump preparatory to blasting, one cannot tell when the screw at the point of the auger will leave the solid wood and get into soil, so losing its feeding power, it is well to use an auger having the side cutting spurs at right angles to the cutting lips.
PopularScience_19211201_0099_006_0264.xml
article
99
99
The Home Workshop
[no value]
Can-Opener Easily Made from Strap Iron
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PopularScience_19211201_0099_006_0265.xml
article
99
99
The Home Workshop
[no value]
Here Is a Use for a Discarded Gasoline Barrel
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PopularScience_19211201_0099_006_0266.xml
advertisement
99
99
[no value]
[no value]
L. E. Waterman Company
[no value]
L. E. Waterman Company
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0267.xml
advertisement
99
99
[no value]
[no value]
BASTIAN BROS. CO.
[no value]
BASTIAN BROS. CO.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0268.xml
advertisement
99
99
[no value]
[no value]
Ottawa Mfg.Co.
[no value]
Ottawa Mfg.Co.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0269.xml
advertisement
99
99
[no value]
[no value]
DOUBLE MILEAGE TIRE & RUBBER CO.
[no value]
DOUBLE MILEAGE TIRE & RUBBER CO.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0270.xml
advertisement
100
100
[no value]
[no value]
VI-REX ELECTRIC CO.
[no value]
VI-REX ELECTRIC CO.
[no value]
[no value]
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PopularScience_19211201_0099_006_0271.xml
article
100
100
The Home Workshop
[no value]
To Lift Locomotive Driving Boxes Vertically
[no value]
[no value]
[no value]
L. J. BITNER
THE width of the device shown here can be made as desired, to suit the size of the box or of a size that will average reasonably close for boxes close to the range of the lifter. The tong part is made of ⅝ in. by 2 in. iron, while the lifting hooks are of ½ in. by 1½ in. by 2½ in. angle-iron.
PopularScience_19211201_0099_006_0272.xml
article
100
100
The Home Workshop
[no value]
Wheelbarrow Wheels Can Be Built at Home
[no value]
[no value]
[no value]
[no value]
I MADE a fairly good wheel in the following manner: Two circular disks were sawn from a 1 in. by 14 in. plank, the full width of the board. A ⅝-in. hole was then bored in each and the two pieces were nailed together, crossing the grain of the wood, and using sixpenny finishing nails.
PopularScience_19211201_0099_006_0273.xml
article
100
100
The Home Workshop
[no value]
A Weight to Aid in Lifting Heavy Doors
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[no value]
[no value]
A. W. ROE
A RESTAURANT I visit has a large icebox with heavy lift door. It is necessary for the waiters to raise this door many times. The ingenious proprietor placed a strong window-weight cord with weight attached over a pulley in the ceiling above the box, then attached the other end of the cord to the front of the icebox door.
PopularScience_19211201_0099_006_0274.xml
article
101
101
The Home Workshop
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Shoe-Polishing Rendered Easy with a Support
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[no value]
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[no value]
DON'T polish your shoes on a chair or other furniture. Make a shoe-polishing stand. It takes up no room, does not disfigure the wall, is very useful, and is easy to make. All that is necessary for such a device are a few pieces of wood, a bolt, and a number of screws of different sizes, a saw, a plane, and a screwdriver.
PopularScience_19211201_0099_006_0275.xml
article
101
101
The Home Workshop
[no value]
If Your Pipe Fails to Draw, Try This
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PopularScience_19211201_0099_006_0276.xml
advertisement
101
101
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Advertisements
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PopularScience_19211201_0099_006_0277.xml
advertisement
102
102
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HAYWOOD TIRE & EQUIPMENT CO.
[no value]
HAYWOOD TIRE & EQUIPMENT CO.
[no value]
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PopularScience_19211201_0099_006_0278.xml
advertisement
102
102
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STANDARD FOOD AND FUR ASS'N
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STANDARD FOOD AND FUR ASS'N
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PopularScience_19211201_0099_006_0279.xml
advertisement
102
102
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AMERICAN SHOW CARD SCHOOL
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AMERICAN SHOW CARD SCHOOL
[no value]
[no value]
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PopularScience_19211201_0099_006_0280.xml
article
102
102
The Home Workshop
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You Can Make this Disk-Grinder Yourself
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[no value]
[no value]
L. M. Jordan
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PopularScience_19211201_0099_006_0281.xml
article
102
102
The Home Workshop
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A Capacious Fountain for the Poultry
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PopularScience_19211201_0099_006_0282.xml
article
103
103
The Home Workshop
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Try a Rubber Hose on the Grease-Gun
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[no value]
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J. C. OTTOFY
[no value]
PopularScience_19211201_0099_006_0283.xml
article
103
103
The Home Workshop
[no value]
Transforming a Tea-Kettle into a Glue-Pot
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PopularScience_19211201_0099_006_0284.xml
article
103
103
The Home Workshop
[no value]
How to Prevent a Wood-Screw from Loosening
[no value]
[no value]
[no value]
L. R. BUTCHER
[no value]
PopularScience_19211201_0099_006_0285.xml
advertisement
103
103
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The Lionel Corporation
[no value]
The Lionel Corporation
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[no value]
PopularScience_19211201_0099_006_0286.xml
advertisement
103
103
[no value]
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MAGNAVOX COMPANY: The Radio MAGNAVOX
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MAGNAVOX COMPANY
The Radio MAGNAVOX
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PopularScience_19211201_0099_006_0287.xml
advertisement
104
104
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Advertisements
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PopularScience_19211201_0099_006_0288.xml
article
104
104
The Home Workshop
[no value]
This Weather Strip Will Adjust Itself
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[no value]
[no value]
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A WEATHER strip on the bottom of the front door must close the open space entirely to exclude the cold, but when the door is swung inwardly the weather strip will strike the carpet and prevent the opening of the door. The strip shown in this illustration corrects this common defect by having narrow slots instead of screw-holes.
PopularScience_19211201_0099_006_0289.xml
article
104
104
The Home Workshop
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Indirect Light from an Old Wash-Basin
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PopularScience_19211201_0099_006_0290.xml
article
105
105
The Home Workshop
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Old Sink Forms Foundation for Gas-Stove
[no value]
[no value]
[no value]
L. K. LANIER
[no value]
PopularScience_19211201_0099_006_0291.xml
article
105
105
The Home Workshop
[no value]
Homemade Cook-Book Holder for the Housewife
[no value]
[no value]
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K. H. HUNTING
[no value]
PopularScience_19211201_0099_006_0292.xml
advertisement
105
105
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Advertisements
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PopularScience_19211201_0099_006_0293.xml
advertisement
106
106
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Advertisements
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PopularScience_19211201_0099_006_0294.xml
article
106
106
The Home Workshop
[no value]
Some Uses for Picture-Hooks for Hanging Pictures
[no value]
[no value]
[no value]
L. H. KIRBY
[no value]
PopularScience_19211201_0099_006_0295.xml
article
106
106
The Home Workshop
[no value]
Shutter-Frames Can Be Used for Window-Screens
[no value]
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MRS. H. E. HOLD
[no value]
PopularScience_19211201_0099_006_0296.xml
advertisement
107
107
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Advertisements
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PopularScience_19211201_0099_006_0297.xml
article
107
107
The Home Workshop
[no value]
Ornaments of Hammered Brass Are Welcome Gifts
[no value]
[no value]
[no value]
L. H. KIRBY
[no value]
PopularScience_19211201_0099_006_0298.xml
article
107
107
The Home Workshop
[no value]
How to Improvise a Slide-Easy Collar
[no value]
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[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0299.xml
advertisement
108
108
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Advertisement
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PopularScience_19211201_0099_006_0300.xml
article
108
108
The Home Workshop
[no value]
Wide-Swinging Gate for the Farmyard
[no value]
[no value]
[no value]
Louis SCHNEIDER
[no value]
PopularScience_19211201_0099_006_0301.xml
article
108
108
The Home Workshop
[no value]
Novel Spooland Twine-Holders and How to Make Them
[no value]
[no value]
[no value]
JENNIE E. McCOY
[no value]
PopularScience_19211201_0099_006_0302.xml
advertisement
109
109
[no value]
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L·W·SWEET INC.
[no value]
L·W·SWEET INC.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0303.xml
advertisement
109
109
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Advertisement: POPULAR SCIENCE MONTHLY
[no value]
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POPULAR SCIENCE MONTHLY
[no value]
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PopularScience_19211201_0099_006_0304.xml
article
109
109
The Home Workshop
[no value]
Spinet is Transformed into Bookcase and Desk
[no value]
[no value]
[no value]
L. C. GOBETZ
[no value]
PopularScience_19211201_0099_006_0305.xml
article
109
109
The Home Workshop
[no value]
A Convenient Ruler that Does Not Slip
[no value]
[no value]
[no value]
HOWARD GREENE
THIS ruler consists merely of a length of angle-brass with ½-in. flanges. Select a smooth piece and finish the ends neatly and the job is done. If you wish, you may mark an inch-scale on it. Use the ruler with the corner up. It gives a hold for the hand better than any except the triangular ruler, and it has the advantage because it will not slip.
PopularScience_19211201_0099_006_0306.xml
advertisement
109
109
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INTERNATIONAL CORRESPONDENCE SCHOOLS
[no value]
INTERNATIONAL CORRESPONDENCE SCHOOLS
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0307.xml
advertisement
109
109
[no value]
[no value]
THE EDWARDS MFG. CO.
[no value]
THE EDWARDS MFG. CO.
[no value]
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[no value]
PopularScience_19211201_0099_006_0308.xml
advertisement
110
110
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Advertisements
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[no value]
[no value]
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PopularScience_19211201_0099_006_0309.xml
article
110
110
The Home Workshop
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Receiving Rain Warning by Telephone
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[no value]
[no value]
E. A. McCANN
[no value]
PopularScience_19211201_0099_006_0310.xml
article
110
110
The Home Workshop
[no value]
Here's an Ingenious Screw-Holder for Starting Screws
[no value]
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PopularScience_19211201_0099_006_0311.xml
article
110
110
The Home Workshop
[no value]
One Method of Removing an Obstinate Staple
[no value]
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PopularScience_19211201_0099_006_0312.xml
advertisement
111
111
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Advertisement: POPULAR SCIENCE MONTHLY
[no value]
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POPULAR SCIENCE MONTHLY
[no value]
[no value]
PopularScience_19211201_0099_006_0313.xml
advertisement
112
112
[no value]
[no value]
U. S. Leather Goods Co.
[no value]
U. S. Leather Goods Co.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0314.xml
advertisement
112
112
[no value]
[no value]
C. G. Conn Ltd.
[no value]
C. G. Conn Ltd.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0315.xml
article
112
112
The Home Workshop
[no value]
Hinged Tailboard with an Eccentric Lock
[no value]
[no value]
[no value]
LOUIS SCHNEIDER
IF you are handy with tools, you can construct a hinged folding tailboard with an eccentric lock such as the one shown in the illustration. The lock is cut from a piece of flat iron stock, the lower end (or tail) being bent slightly outward to provide a handle.
PopularScience_19211201_0099_006_0316.xml
article
112
112
The Home Workshop
[no value]
Hallstand Is Built from an Old Oak Easel
[no value]
[no value]
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[no value]
PopularScience_19211201_0099_006_0317.xml
article
112
112
The Home Workshop
[no value]
Try a Coal "Carburetor" on Your Range
[no value]
[no value]
[no value]
[no value]
THE object of the device is to save coal, which it does by mixing the gases created in combustion with air and burning them, instead of permitting them to go to waste up the chimney. Manufacturers of several patented “carburetors” claim a saving of at least 20 per cent in the amount of coal used, besides complete combustion, giving a uniform heat, and burning the coal to a fine white ash without clinkers.
PopularScience_19211201_0099_006_0318.xml
article
112
112
The Home Workshop
[no value]
Correct Drawing May Cause Error in Machining
[no value]
[no value]
[no value]
G. A. LUERS
[no value]
PopularScience_19211201_0099_006_0319.xml
article
113
113
The Home Workshop
[no value]
How to Obtain Reflected Light for Indoor Pictures
[no value]
[no value]
[no value]
B. FOX
[no value]
PopularScience_19211201_0099_006_0320.xml
article
113
113
The Home Workshop
[no value]
Another Winter Use for an Electric Fan
[no value]
[no value]
[no value]
JOSEPH B. MORAN
[no value]
PopularScience_19211201_0099_006_0321.xml
advertisement
113
113
[no value]
[no value]
THE PORTER CHEMICAL COMPANY
[no value]
THE PORTER CHEMICAL COMPANY
[no value]
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[no value]
PopularScience_19211201_0099_006_0322.xml
advertisement
114
114
[no value]
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Advertisements
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PopularScience_19211201_0099_006_0323.xml
article
114
114
The Home Workshop
[no value]
How to Clean the Under Part of the Boat Hull
[no value]
[no value]
[no value]
G. A. LUERS
[no value]
PopularScience_19211201_0099_006_0324.xml
article
114
114
The Home Workshop
[no value]
Straightening Cotters to Bring Points Together
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0325.xml
article
114
114
The Home Workshop
[no value]
Stamp-Pads May Be Made of Type Ribbons
[no value]
[no value]
[no value]
GEO. H. HOLDEN
[no value]
PopularScience_19211201_0099_006_0326.xml
article
115
115
The Home Workshop
[no value]
Pulling Posts Is Rendered Easy by This Method
[no value]
[no value]
[no value]
E. BADE
[no value]
PopularScience_19211201_0099_006_0327.xml
article
115
115
The Home Workshop
[no value]
To Prevent a Saw from Sliding to the Ground
[no value]
[no value]
[no value]
ANTHONY E. ZIPPRICH
[no value]
PopularScience_19211201_0099_006_0328.xml
advertisement
115
115
[no value]
[no value]
THE FLORSHEIM SHOE CO.
[no value]
THE FLORSHEIM SHOE CO.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0329.xml
advertisement
115
115
[no value]
[no value]
The Nagel-Chase Mfg. Co.: WIZARD LAMPS & LANTERNS
[no value]
The Nagel-Chase Mfg. Co.
WIZARD LAMPS & LANTERNS
[no value]
[no value]
PopularScience_19211201_0099_006_0330.xml
advertisement
116
116
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Advertisements
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[no value]
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PopularScience_19211201_0099_006_0331.xml
article
116
116
The Home Workshop
[no value]
Attach a Hand-Guard to the Wheelbarrow
[no value]
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PopularScience_19211201_0099_006_0332.xml
article
116
116
The Home Workshop
[no value]
Handy Nozzle on the Hose for Filling Radiator
[no value]
[no value]
[no value]
L. B. ROBBINS
[no value]
PopularScience_19211201_0099_006_0333.xml
article
116
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The Home Workshop
[no value]
Use Old Books for Filing Bills, Recipes, or Pictures
[no value]
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ARTHUR GOLDENBAUM
[no value]
PopularScience_19211201_0099_006_0334.xml
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117
117
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VICTOR J. EVANS & CO.
[no value]
VICTOR J. EVANS & CO.
[no value]
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PopularScience_19211201_0099_006_0335.xml
advertisement
118
118
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Advertisements
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PopularScience_19211201_0099_006_0336.xml
article
118
118
The Home Workshop
[no value]
Heat Room with Pie-Plate and Gaslight
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FOR heating the bathroom or other room when there is no fire in the house, as in the early fall or spring, a device can be made with little expense. The materials needed are a few pipe lengths, joints, an old pie-plate, and a small sheet of asbestos.
PopularScience_19211201_0099_006_0337.xml
article
118
118
The Home Workshop
[no value]
Reference-Book Pages Held with Tire-Tape
[no value]
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[no value]
G. A. LUERS
[no value]
PopularScience_19211201_0099_006_0338.xml
advertisement
119
119
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Advertisements
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PopularScience_19211201_0099_006_0339.xml
article
119
119
The Home Workshop
[no value]
Providing a Soft Nose for the Peen-Hammer
[no value]
[no value]
[no value]
G. A. LUERS
A SIMPLE modification of a ball peen-hammer for purposes of driving in ball-races or for any other use where a brass or copper hammer is required, as on gears, is shown in the illustration. For this purpose any hammer is suitable, even if the peening end is well worn and battered, as the ball must he sawed or ground off.
PopularScience_19211201_0099_006_0340.xml
article
119
119
The Home Workshop
[no value]
A Suggestion for a Cork Handle for Your Fishing-Pole
[no value]
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J. H. MOORE
IF the cork handle on your fishing-pole is worn, below is described how you can make one at practically no expense. Obtain three ferrules, or steel washers, and a number of large corks. Place one of the ferrules in position, put a few corks over the rod, fasten the second ferrule in place, then a few more corks, last of all finishing up with the third ferrule.
PopularScience_19211201_0099_006_0341.xml
article
119
119
The Home Workshop
[no value]
Try This Emergency ClothesLine Pulley
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PopularScience_19211201_0099_006_0342.xml
advertisement
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Advertisements
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PopularScience_19211201_0099_006_0343.xml
article
120
120
The Home Workshop
[no value]
How Leather Straps Can Be Made at Home
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E. BADE
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PopularScience_19211201_0099_006_0344.xml
article
120
120
The Home Workshop
[no value]
Do You Make Your Own Wire Terminals?
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A. J. CHRISTOPHER
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PopularScience_19211201_0099_006_0345.xml
advertisement
121
121
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Advertisements
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PopularScience_19211201_0099_006_0346.xml
article
121
121
The Home Workshop
[no value]
This Photo-Print Washing-Box Rocks Automatically
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PopularScience_19211201_0099_006_0347.xml
article
121
121
The Home Workshop
[no value]
Equip Your Tenon-Saw with This Guard
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PopularScience_19211201_0099_006_0348.xml
article
121
121
The Home Workshop
[no value]
Furniture Polish Renews Old Auto Window Lights
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PopularScience_19211201_0099_006_0349.xml
advertisement
122
122
[no value]
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Brown & Sharpe Mfg. Co.
[no value]
Brown & Sharpe Mfg. Co.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0350.xml
advertisement
122
122
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Ottawa Mfg. Co.
[no value]
Ottawa Mfg. Co.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0351.xml
article
122
122
The Home Workshop
[no value]
Cats Can Be Kept Off the Back Fence
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PopularScience_19211201_0099_006_0352.xml
article
122
122
The Home Workshop
[no value]
Pipe-Pulling Tool Is Useful on the Farm
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[no value]
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L. B. ROBBINS
TO pull a pipe from the depths of the earth is strenuous work, but here is a tool that will be a sure help. Get a wagon-tongue and cut it about 8 ft. long. At the large end or butt, screw two steel plates to opposite sides and drill three holes through the plates and timber 6, 9, and 12 in. from the end.
PopularScience_19211201_0099_006_0353.xml
article
123
123
The Home Workshop
[no value]
Skylight Serves City Dweller as a Hotbed
[no value]
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D. R. VAN HORN
[no value]
PopularScience_19211201_0099_006_0354.xml
article
123
123
The Home Workshop
[no value]
A Collapsible Stepladder for Home or Shop
[no value]
[no value]
[no value]
GEORGE H. HOLDEN
[no value]
PopularScience_19211201_0099_006_0355.xml
advertisement
123
123
[no value]
[no value]
THE L. S. STARRETT CO.
[no value]
THE L. S. STARRETT CO.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0356.xml
advertisement
123
123
[no value]
[no value]
THE AKRON LAMP CO.: New 300 Candle Powder Lamp
[no value]
THE AKRON LAMP CO.
New 300 Candle Powder Lamp
[no value]
[no value]
PopularScience_19211201_0099_006_0357.xml
advertisement
123
123
[no value]
[no value]
UNION TOOL CHEST CO.
[no value]
UNION TOOL CHEST CO.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0358.xml
advertisement
123
123
[no value]
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METALLIC LETTER CO.
[no value]
METALLIC LETTER CO.
[no value]
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[no value]
PopularScience_19211201_0099_006_0359.xml
advertisement
124
124
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Advertisements
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PopularScience_19211201_0099_006_0360.xml
article
124
124
The Home Workshop
[no value]
The Tip-Up for Fishing through the Ice
[no value]
[no value]
[no value]
ROBERT PAGE LINCOLN
[no value]
PopularScience_19211201_0099_006_0361.xml
article
124
124
The Home Workshop
[no value]
A Finger-Nail File Used as a Match-Scratcher
[no value]
[no value]
[no value]
WM. A. JACKSON
[no value]
PopularScience_19211201_0099_006_0362.xml
article
124
124
The Home Workshop
[no value]
Carrying the torage Battery with a Chain
[no value]
[no value]
[no value]
WERNER STAAF
[no value]
PopularScience_19211201_0099_006_0363.xml
article
125
125
The Home Workshop
[no value]
Drainpipes May Be Used as Porch Supports
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0364.xml
article
125
125
The Home Workshop
[no value]
A Quick Repair of a Broken Muffler on a Motorboat
[no value]
[no value]
[no value]
B. FOX
[no value]
PopularScience_19211201_0099_006_0365.xml
advertisement
125
125
[no value]
[no value]
NORTHWESTERN ELECTRIC COMPANY
[no value]
NORTHWESTERN ELECTRIC COMPANY
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0366.xml
advertisement
125
125
[no value]
[no value]
KUEMPEL CO.
[no value]
KUEMPEL CO.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0367.xml
advertisement
125
125
[no value]
[no value]
AMERICAN PRODUCTS CO.
[no value]
AMERICAN PRODUCTS CO.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0368.xml
advertisement
125
125
[no value]
[no value]
SOUTH BEND LATHE WORKS
[no value]
SOUTH BEND LATHE WORKS
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0369.xml
advertisement
126
126
[no value]
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Advertisements
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[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0370.xml
article
126
126
The Home Workshop
[no value]
The Old Lawn-Mower Becomes a Good Countershaft
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PopularScience_19211201_0099_006_0371.xml
article
126
126
The Home Workshop
[no value]
Pail and Tub as an Improvised Air-Compressor
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[no value]
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PopularScience_19211201_0099_006_0372.xml
article
127
127
The Home Workshop
[no value]
This Sharpening-Tool will Concave the Ice-Skate
[no value]
[no value]
[no value]
[no value]
ONE of the best ways to sharpen a skate is to slightly hollow or concave it in the center. The depression runs the long way of the runner and it is difficult to make it accurately unless you have a tool to hold the round file. The picture shows one designed for this purpose and that will do the work well.
PopularScience_19211201_0099_006_0373.xml
article
127
127
The Home Workshop
[no value]
Furniture-Repair Kink for Holding Rungs and Legs
[no value]
[no value]
[no value]
G. A. LUERS
[no value]
PopularScience_19211201_0099_006_0374.xml
advertisement
127
127
[no value]
[no value]
OTTAWA MFG. CO.
[no value]
OTTAWA MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0375.xml
advertisement
128
128
[no value]
[no value]
American Technical Society
[no value]
American Technical Society
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0376.xml
advertisement
129
129
[no value]
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THE IVES MANUFACTURING CORPORATION
[no value]
THE IVES MANUFACTURING CORPORATION
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[no value]
[no value]
PopularScience_19211201_0099_006_0377.xml
advertisement
130
130
[no value]
[no value]
Victor Talking Machine Company
[no value]
Victor Talking Machine Company
[no value]
[no value]
[no value]
PopularScience_19211201_0099_006_0378.xml