Issue: 19240401

Tuesday, April 1, 1924
APRIL, 1924
4
True
104
Tuesday, December 30, 2014

Articles
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Popular Science Monthly
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PopularScience_19240401_0104_004_0001.xml
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Advertisements
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Radio Corporation of America
Radiola III
Radio Corporation of America
Radiola X
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PopularScience_19240401_0104_004_0002.xml
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1
1
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Advertisements
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THE CROSLEY RADIO CORPORATION
CROSLEY MODEL X-J
THE CROSLEY RADIO CORPORATION
CROSLEY MODEL X-L Consolette
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PopularScience_19240401_0104_004_0003.xml
article
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Popular Science Monthly
In Next Month's Issue
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MANY people ask why POPULAR SCIENCE MONTHLY has such power to attract and hold the interest. Perhaps the answer is that service is its underlying policy. In every field of human activity, every day in the year, science, in some way, serves us.
PopularScience_19240401_0104_004_0004.xml
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National Salesmen’s Training Association
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National Salesmen’s Training Association
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PopularScience_19240401_0104_004_0005.xml
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4
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UNIVERSAL CHIROPRACTORS' ASSOCIATION
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UNIVERSAL CHIROPRACTORS' ASSOCIATION
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PopularScience_19240401_0104_004_0006.xml
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5
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Advertisement
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PopularScience_19240401_0104_004_0007.xml
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6
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Advertisement
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PopularScience_19240401_0104_004_0008.xml
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7
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L. L. COOKE
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L. L. COOKE
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PopularScience_19240401_0104_004_0009.xml
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8,10,12,14,16,18,19,20,22,24,26
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Money Making Opportunities
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PopularScience_19240401_0104_004_0010.xml
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9
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NELSON DOUBLEDAY, Inc.
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NELSON DOUBLEDAY, Inc.
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PopularScience_19240401_0104_004_0011.xml
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10
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THEO. AUDEL & CO.
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THEO. AUDEL & CO.
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PopularScience_19240401_0104_004_0012.xml
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BABSON BROS.
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BABSON BROS.
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PopularScience_19240401_0104_004_0013.xml
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FRANKLIN INSTITUTE
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FRANKLIN INSTITUTE
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PopularScience_19240401_0104_004_0014.xml
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13
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ALLIED MERKE INSTITUTES, Inc.
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ALLIED MERKE INSTITUTES, Inc.
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PopularScience_19240401_0104_004_0015.xml
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Advertisements
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PopularScience_19240401_0104_004_0016.xml
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Bureau of Inventive Science
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Bureau of Inventive Science
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PopularScience_19240401_0104_004_0017.xml
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CHIEF DRAFTSMAN DOBE
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CHIEF DRAFTSMAN DOBE
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PopularScience_19240401_0104_004_0018.xml
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16
16
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SHERWIN CODY-SCHOOL OF ENGLISH
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SHERWIN CODY-SCHOOL OF ENGLISH
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PopularScience_19240401_0104_004_0019.xml
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16
16
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BURGESS ELECTRICAL SCHOOL
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BURGESS ELECTRICAL SCHOOL
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PopularScience_19240401_0104_004_0020.xml
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17
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THEO. AUDEL & CO.
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THEO. AUDEL & CO.
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PopularScience_19240401_0104_004_0021.xml
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University of Applied Science
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University of Applied Science
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PopularScience_19240401_0104_004_0022.xml
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McCarrie School of Mechanical Dentistry
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McCarrie School of Mechanical Dentistry
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PopularScience_19240401_0104_004_0023.xml
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19
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AMERICAN SCHOOL
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AMERICAN SCHOOL
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PopularScience_19240401_0104_004_0024.xml
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Advertisements
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PopularScience_19240401_0104_004_0025.xml
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PopularScience_19240401_0104_004_0026.xml
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PopularScience_19240401_0104_004_0027.xml
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PopularScience_19240401_0104_004_0028.xml
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PopularScience_19240401_0104_004_0029.xml
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CHICAGO TECHNICAL COLLEGE
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CHICAGO TECHNICAL COLLEGE
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PopularScience_19240401_0104_004_0030.xml
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Detroit Auto Painting School
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Detroit Auto Painting School
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PopularScience_19240401_0104_004_0031.xml
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S. & H. Engineering Co. Division of Lincoln Institute of Technology
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S. & H. Engineering Co. Division of Lincoln Institute of Technology
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PopularScience_19240401_0104_004_0032.xml
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PopularScience_19240401_0104_004_0033.xml
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PopularScience_19240401_0104_004_0034.xml
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AMERICAN TECHNICAL SOCIETY
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AMERICAN TECHNICAL SOCIETY
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PopularScience_19240401_0104_004_0035.xml
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Federal School of Commercial Designing
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Federal School of Commercial Designing
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PopularScience_19240401_0104_004_0036.xml
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Advertisement: POPULAR SCIENCE MONTHLY
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POPULAR SCIENCE MONTHLY
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PopularScience_19240401_0104_004_0037.xml
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A H. GREBE & COMPANY, INC.
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A H. GREBE & COMPANY, INC.
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PopularScience_19240401_0104_004_0038.xml
article
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31,32
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A Rocket to the Moon
More than Six Miles a Second
Is There Life on the Moon?
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F. Gregory Hartswick
IF THE proposed transpolar flight by airship is. completed successfully, almost the last unexplored region of the earth will have been charted and mapped. In the restless wanderings of man over this globe only a few square miles have been left untrodden.
PopularScience_19240401_0104_004_0039.xml
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Motorized Rapid Transit in the Far North
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THE march of science into the frozen expanses of the Far North is bringing a new era of rapid communication across the wildernesses of snow. Mail planes equipped with landing skis, and swift, motorized sleds soon may replace the picturesque dog teams, just as the motor car is replacing the camels of the desert.
PopularScience_19240401_0104_004_0040.xml
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34,35
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Broncho-Busting the Wild Colorado
A Race with Death through Seething Rapids
A Racing, Rioting Torrent
Lifelines in Daily Use
Boats Tossed High in the Air
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George Dacy
SCIENCE has stormed successfully the last bulwark of Nature in the United States. A few weeks ago an exploration and surveying party of the United States Geological Survey, headed by Col. C. H. Birdseye, completed the work of surveying and mapping the Colorado River through the Grand Canyon—a 450mile swirling stretch of the wildest water in the world.
PopularScience_19240401_0104_004_0041.xml
article
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Listening In for Insect "Voices"
Supersensitive Microphone Designed to Perfect Radio Broadcasting Holds Fascinating Possibilities for Scientific Research
Perfect Radio Reproduction
How the Sounds Are Detected
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Donald Harris
WHEN you listen in on the radio to a violin selection or a piano solo, your ears and your memory tell you that what you hear does not sound exactly like the tones of any violin or piano you ever have heard. The sounds that come to you through your headset or loudspeaker approximate those of the instruments, but you would have little difficulty in distinguishing the sounds of a real violin or piano from the radio reproduction.
PopularScience_19240401_0104_004_0042.xml
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37,38,131,132
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Emotions—the Fuel of Life
What Emotion Is
Man's Greatest Terror
Learn to Control Emotion
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IN A small city of the Middle West that I have occasion to visit now and then are two drug-stores. One of them has been established for many years. Its proprietor is an excellent pharmacist. That I know from ' experience. The other is a new store— about three years old.
PopularScience_19240401_0104_004_0043.xml
article
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Odd Faces from the Insect World
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Paul Griswold Howes
INSECTS possess distinct and varied facial expressions, ranging from what appears to be smirking amiability to gloating frightfulness, yet any attempt to judge their true character from their faces is futile. The terrifying expressions undoubtedly are protective measures endowed by Nature.
PopularScience_19240401_0104_004_0044.xml
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Summer to Winter in Forty Minutes
Enjoyed by Few
A Staggering Task
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Robert E. Martin
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PopularScience_19240401_0104_004_0045.xml
article
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Black Flour—The New Fuel
Pulverized Coal Piped into Furnaces like Gas
Great Fuel Saving
May Reduce Coal Prices
Burns like Gas Flame
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Truman Stevens
PIPING coal from the mine directly into industrial furnaces, as electric power and gas now are delivered from a central station to consumers, may seem like a wild flight of fancy; yet that is what fuel experts say may be seen in the future as a result of recent developments in the use of pulverized coal—the world’s newest fuel.
PopularScience_19240401_0104_004_0046.xml
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43,44,45,133,134
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Science Sees, Hears, Counts Atoms
New Triumphs in Spectacular Conquest of Tiny Worlds of Wealth
Seeing the “Invisible”
Hidden Sources of Wealth
What Elements Are
A Marvelous New Alchemy
The Electrons
Why Substances Are Different
Changing Atoms
The Most Enormous Force Known
Tremendous Sources of Energy
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Raymond J. Brown
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PopularScience_19240401_0104_004_0047.xml
article
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46,47
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In the Mirror of Science
New Discoveries and What They Promise for You
The Conquest of Disease
A New Universe Discovered
A Successor to Moth Balls
Locating Ore by Quakes
Mice and Men
A Boy or a Girl—Which?
More Triumphs for Radio
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PopularScience_19240401_0104_004_0048.xml
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"Why I Value My Hobby"
Prize Contest Winners Find Happiness in Useful Relaxation
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A FEW years ago, if some one had asked me whether I had a hobby, I should have been at a loss for an answer. I did not start out to develop a hobby. It just came about in a natural way. I am in the sheet-metal business, and often had thought I should like to make something out of the ordinary—something that would tax my ability as a sheet-metal worker to the limit.
PopularScience_19240401_0104_004_0049.xml
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49,50
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Nature’s Own Alarm System
Every Headache a Warning from Your Bodily Machinery
Aches of Sympathy
Find the Causes
Ten Reasons Why Your Head Aches
The Poison of Fatigue
Fresh Air Needed
Time for Repairs
Eyestrain a Cause of Headaches
Danger Points of the Year
A False Argument
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Edwin F. Bowers
YOU are the operator of one of the most elaborate and most important machines in the world. Its working depends on many small parts, any one of which, if out of order, will impair the efficiency of the whole. That machine is your must see you through life.
PopularScience_19240401_0104_004_0050.xml
article
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In Armor of Nails, Hunter Will Battle Wolves
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PopularScience_19240401_0104_004_0051.xml
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A Strange Shouting Fish
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A NEW species of fish that is brilliantly illuminated and that makes a loud shouting noise when chasing smaller fishes has been discovered in the waters of Monterey Bay, Calif., according to Dr. C. W. Greene, of the University of Missouri. Its ability to shout is due to the peculiar construction of its swim bladder, he says.
PopularScience_19240401_0104_004_0052.xml
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Across Niagara's Whirlpools in a cable Car
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PopularScience_19240401_0104_004_0053.xml
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Horses Give Their Blood for War on Diphtheria
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PopularScience_19240401_0104_004_0054.xml
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Will You Be Able to Do This when You Are 70?
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PopularScience_19240401_0104_004_0055.xml
article
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Model of Great Dirigible Tested for Strength
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PopularScience_19240401_0104_004_0056.xml
article
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52
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Portable Acetylene Lamp Designed for Safety
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PopularScience_19240401_0104_004_0057.xml
article
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Camera Support Made from Two Hunting Knives
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PopularScience_19240401_0104_004_0058.xml
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Safety-Razor Blades Honed and Stropped Quickly
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PopularScience_19240401_0104_004_0059.xml
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A Midget Car for Two
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PopularScience_19240401_0104_004_0060.xml
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One-Hand, 40-Hour Watch
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PopularScience_19240401_0104_004_0061.xml
article
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Straw Gas for Light, Heat, and Power on the Farm
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STRAW soon may be lighting the farmer’s house, cooking his meals, substituting for coal in winter and even running his automobile. The United States Bureau of Chemistry has discovered a practicable method by which a ton of sun-dried wheat straw is said to yield 10,000 cubic feet of illuminating gas, 10 gallons of tar, and 625 pounds of carbon residue, which is an excellent fuel.
PopularScience_19240401_0104_004_0062.xml
article
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53
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Studio Bed Folds into Attractive Table
Dyed Shoes Poison Wearer
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PopularScience_19240401_0104_004_0063.xml
article
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53
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Shoes Shined for a Penny by Slot Machine
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PopularScience_19240401_0104_004_0064.xml
article
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All-Metal Propeller for Airplane Safety
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PopularScience_19240401_0104_004_0065.xml
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Driver S1eeps in Three-Wheel Touring Car
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PopularScience_19240401_0104_004_0066.xml
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54
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Automatic Oil Feed for Ford Crankcase
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PopularScience_19240401_0104_004_0067.xml
article
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54
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Cheaper Dynamite Made from Sawdust
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DYNAMITE that can be manufactured cheaply from sawdust has been invented by Prof. William M. Dehn, University of Washington, Seattle. He claims it will insure farmers of the Pacific Northwest a permanent and inexpensive medium for blasting stumps from logged-off lands.
PopularScience_19240401_0104_004_0068.xml
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Gas-Jet with Safety Valve Prevents Accidents
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PopularScience_19240401_0104_004_0069.xml
article
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Portable Electric Motor Is Air-Cooled
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PopularScience_19240401_0104_004_0070.xml
article
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Road Paved with Cast-Off Solid Rubber Tires
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PopularScience_19240401_0104_004_0071.xml
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Compact Cabinetmaker Does Work of 10 Men
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PopularScience_19240401_0104_004_0072.xml
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Electric Machine Does Welding or Forging
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PopularScience_19240401_0104_004_0073.xml
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Old Blast Furnace Felled by Dynamite Discharge
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PopularScience_19240401_0104_004_0074.xml
article
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Gage Measures Rotating Work
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PopularScience_19240401_0104_004_0075.xml
article
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56
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Motorcycles Transformed into Mail Coaches
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PopularScience_19240401_0104_004_0076.xml
article
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Mechanical Secretary Takes Telephone Calls
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PopularScience_19240401_0104_004_0077.xml
article
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Floor Lamp and Talking Machine Combined
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PopularScience_19240401_0104_004_0078.xml
article
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All-Meta1 Hair-Brush Is A Easy to Keep Clean
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PopularScience_19240401_0104_004_0079.xml
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Motor Truck Moves Garage a Mile on Its Back
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PopularScience_19240401_0104_004_0080.xml
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Filling Station Computes Gasoline Bill
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PopularScience_19240401_0104_004_0081.xml
article
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Machines to Harvest Vast Canadian Peat Bogs
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PopularScience_19240401_0104_004_0082.xml
article
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This Player Piano Is also a Banjo Instructor
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PopularScience_19240401_0104_004_0083.xml
article
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Tractors Take Job of Elephants in India
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0084.xml
article
58
58
[no value]
[no value]
"Thermometer Clock" Has only One Hand
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0085.xml
article
58
58
[no value]
[no value]
Paper Cabinet Saves Time for the Typist
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0086.xml
article
58
58
[no value]
[no value]
The Sea's "Cold Wall"
[no value]
[no value]
[no value]
[no value]
WHERE the Gulf Stream and the iceberg-laden Labrador Current meet off the Grand Banks of Newfoundland, extreme differences in the temperature of the sea water often are observed over short distances. This dividing line is known as the “cold wall.”
PopularScience_19240401_0104_004_0087.xml
article
58
58
[no value]
[no value]
Case for Medicine Bottle Prevents Spilling
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0088.xml
article
58
58
[no value]
[no value]
Automobile and Airplane Combined in Model
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0089.xml
article
59
59
[no value]
[no value]
An Electric Flashlight without a Battery
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0090.xml
article
59
59
[no value]
[no value]
Safety Goggles Attached to Eyeglass Rims
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0091.xml
article
59
59
[no value]
[no value]
Largest Bank Vault Door Four Feet Thick
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0092.xml
article
59
59
[no value]
[no value]
Ball-Shaped Gasoline Tank to Reduce Waste
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0093.xml
article
60
60
[no value]
[no value]
Mechanical Hands to Make
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0094.xml
article
61
61
[no value]
[no value]
Light Work for Housewives
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0095.xml
article
62
62
[no value]
[no value]
Residence District Invaded by a Coal Mine
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0096.xml
article
62
62
[no value]
[no value]
Heated Box Is Substituted for Bedclothing
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0097.xml
article
62
62
[no value]
[no value]
Electric Flashlight Blown like a Whistle
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0098.xml
article
62
62
[no value]
[no value]
Home Stepladder Designed for Sure Footing
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0099.xml
article
62
62
[no value]
[no value]
Iron Rust Costs Nation Billions Each Year
[no value]
[no value]
[no value]
[no value]
RUSTING of iron and steel costs the United States about $3,000,000,000 a year, according to a report recently made by J. Vipond Davies, president of the United Engineering Society, based on researches extending over a period of 12 years. Investigations revealed that sea water, water in alkaline coils, or water percolating through “fills” containing some kind of chemical wastes are the most common assailants of iron.
PopularScience_19240401_0104_004_0100.xml
article
63
63
[no value]
[no value]
Game Scoring Simplified by Scientific Method
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0101.xml
article
63
63
[no value]
[no value]
Wood Blocks Shaped to the Hand for Penholders
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0102.xml
article
63
63
[no value]
[no value]
Swimmer Finds Art and Writing of Cavemen
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0103.xml
article
63
63
[no value]
[no value]
Safety Razor Sharpener Operated by Crank
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0104.xml
article
64
64
[no value]
[no value]
Electric Locomotive Victor in "Tug-of-War"
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0105.xml
article
64
64
[no value]
[no value]
Ride Side by Side on Odd Tandem Bicycle
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0106.xml
article
64
64
[no value]
[no value]
He Counts Dust Particles in the Atmosphere
Frog Carries Its Young
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0107.xml
article
64
64
[no value]
[no value]
Odd Land Boat Rowed by Oarlike Levers
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0108.xml
article
64
64
[no value]
[no value]
Electric Barbecue Cooks 2000 Pounds of Meat
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0109.xml
article
65
65
[no value]
[no value]
Thirty-Year-Old Engine Holds Speed Record
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0110.xml
article
65
65
[no value]
[no value]
Giant Organ Pipe Weighs More than a Ton
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0111.xml
article
65
65
[no value]
[no value]
Famous Pianist Invents Recording Mechanism
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0112.xml
article
65
65
[no value]
[no value]
Uncle Sam's Greatest Gun Shoots 23 Miles
Red Men Prefer Red Color
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0113.xml
article
66
66
[no value]
[no value]
Attacks Tuberculosis by Uncovering Hidden Germs
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0114.xml
article
66
66
[no value]
[no value]
Powerful Microscope Is Five Feet Long
Synthetic Wood Alcohol
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0115.xml
article
66
66
[no value]
[no value]
“Moonlight Movies” Filmed in the Daytime
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0116.xml
article
66
66
[no value]
[no value]
Sunflower Plant Saved by Hairpin Surgery
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0117.xml
article
67
67
[no value]
[no value]
Dubbed Golf Shots Laid to Imperfect Balls
The Tungsten Filament
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0118.xml
article
67
67
[no value]
[no value]
Coffee Not Injurious, Investigators Find
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0119.xml
article
67
67
[no value]
[no value]
Your Body Is Losing Weight Every Second
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0120.xml
article
68
68
[no value]
[no value]
Electric Speed Giant Shipped to France
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0121.xml
article
68
68
[no value]
[no value]
Machine Performs the Work of Many Clerks
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0122.xml
article
68
68
[no value]
[no value]
New Twistless Blade for Insulated Screwdriver
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0123.xml
article
68
68
[no value]
[no value]
Transparent Minnow Trap for Fishermen
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0124.xml
article
68
68
[no value]
[no value]
Gelatin a Valuable Food
[no value]
[no value]
[no value]
[no value]
THE food value of gelatin is far greater than is realized generally, according to the announcement of chemists of the Mellon Institute of Industrial Research, University of Pittsburgh, who recently completed a scientific investigation of the subject.
PopularScience_19240401_0104_004_0125.xml
article
69
69
[no value]
[no value]
Nine Collapsible Chairs to a Foot of Space
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0126.xml
article
69
69
[no value]
[no value]
Our Bodies, like Engines, Must Be Cooled
[no value]
[no value]
[no value]
[no value]
IF IT were possible to inclose a man so that while he could breathe, no heat could escape from his body, he would die quickly. Such is the announcement of Dr. T. H. Read, supervising mining engineer of the Department of the Interior, and F. C. Houghton of the American Society of Heating and Ventilating Engineers, who have completed an investigation of effects of heat on the body.
PopularScience_19240401_0104_004_0127.xml
article
69
69
[no value]
[no value]
Steam Excavator Turned into a Pile Driver
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0128.xml
article
69
69
[no value]
[no value]
Testing-Stand Diagnoses Automobile Ills
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0129.xml
article
70
70
[no value]
[no value]
The Man Who Sends Time Signals
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0130.xml
article
70
70
[no value]
[no value]
Powerful Receiver Carried on Hiker's Belt
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0131.xml
article
70
70
[no value]
[no value]
A Changeable Rheostat
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0132.xml
article
70
70
[no value]
[no value]
Have You Consulted the Family Radio Doctor?
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0133.xml
article
70
70
[no value]
[no value]
New Variable Condenser for Finest Tuning
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0134.xml
article
70
70
[no value]
[no value]
Novel Type of Rheostat Is Easily Adjusted
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0135.xml
article
71
71,72,135,136,137
[no value]
[no value]
Adventures in Home Ownership
Chapter I—We Hunt a Ready-Built House
A Handbook on Home Buying
We Visit an Old House
An Electrical Home
[no value]
[no value]
Phil M. Riley
To MOST of us the fun of hunting a house we can call our own is like the fun of going fishing, of sitting by an open campfire, or of hiking through unfamiliar country—it seems to be born in our flesh. In my time I must have explored at least a thousand houses from garret to cellar.
PopularScience_19240401_0104_004_0136.xml
article
73
73,74
[no value]
[no value]
How To Find the Combination for Tuning Your Radio Set
Rules of Tuning
Operating the Regenerative Receiver
The Squeal Maker
When the Set Is Too Sensitive
Tuning the Superdyne
Losses Caused by Shielding
Use of the C Battery
One Battery for Both Stages
[no value]
[no value]
Jack Binns
[no value]
PopularScience_19240401_0104_004_0137.xml
article
75
75,138,139,140
[no value]
[no value]
How to Build a Loudspeaking Three-Tube Radio Receiver
The Ideal Circuit
Winding the Tuning Elements
The Special Tuner
Method of Tapping Coils
Ratios of Transformer Windings
Connecting the Secondary Winding
Battery Connections
[no value]
[no value]
Joseph Calcaterra
WHAT is the ideal three-tube receiver for home construction? This question has called forth volumes of letters from radio fans who like to build their own sets and to experiment with various types of instruments. It is generally conceded that a receiver, to be efficient, must be a good distance-getter, simple to operate, with loudspeaker volume on distant stations.
PopularScience_19240401_0104_004_0138.xml
article
76
76
[no value]
[no value]
Mechanical Gearless Transmission
British Inventor Applies Pendulum Principle in New System
[no value]
[no value]
[no value]
GEARSHIFT transmission for automobiles may be made obsolete within a few years by a revolutionary new invention that connects the engine with the driving wheels without the use of any gears whatsoever. It is the work of George Constantinesco, a distinguished British engineer.
PopularScience_19240401_0104_004_0139.xml
article
77
77,78
[no value]
[no value]
Save a Fourth of Your Gasoline
How to Get Greater Power from Your Car with Less Fuel
More than Luck
Ten Ways to Save Your Gasoline
Carbon Wasteful
Let Well Enough Alone
Adjusting the Points
[no value]
[no value]
F. A. Platte
RETURNING from an 1100-mile motor tour not long ago, I chanced to tell a friend that I had the tank filled only four times while a in other words, that I had used about 60 gallons—approximately 18 miles to the gallon. “Do you expect me to believe that?” he demanded.
PopularScience_19240401_0104_004_0140.xml
article
79
79
[no value]
[no value]
Springtime Hints for Auto Touring
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0141.xml
article
80
80
[no value]
[no value]
Fun and Profit in My Jack-Knife
A Trophy of Revolutionary Days
Procure the Right Knife
[no value]
[no value]
C. J. Reynolds
JACK-KNIFE whittling, which for a time appeared to be one of the lost arts, is coming back. Time was when every American man had a jack-knife and knew how to use it. This skill, acquired through long practice, stood him in good stead in many emergencies throughout life.
PopularScience_19240401_0104_004_0142.xml
article
81
81,129,130
The Home Workshop
[no value]
Modern Dining Alcoves that Save Labor
Adapted for Use in Any House
Make All Measurements with Care
[no value]
[no value]
Arthur Wakeling
[no value]
PopularScience_19240401_0104_004_0143.xml
article
82
82
[no value]
[no value]
Attractive “Habitant” Chairs Are Built Easily
[no value]
[no value]
[no value]
Stanley W. Blanchard
UP IN Quebec, the home of the French-Canadian, the habitants still order their lives very much as did their fathers before them and, if need be, make their own furniture. It is one of these pieces of furniture, a chair (Fig. 1), that I shall describe.
PopularScience_19240401_0104_004_0144.xml
article
82
82
[no value]
[no value]
Box Hinges Cut from Sheet Metal
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0145.xml
advertisement
83
83
[no value]
[no value]
S.C. JOHNSON & SON: Johnson's Wood Dye
[no value]
S.C. JOHNSON & SON
Johnson's Wood Dye
[no value]
[no value]
PopularScience_19240401_0104_004_0146.xml
article
84
84
[no value]
[no value]
Tricks Every Woodworker Should Know
Cutting to the Scribed Line
Allowing for Misalinement
[no value]
[no value]
Edwin M. Love
[no value]
PopularScience_19240401_0104_004_0147.xml
advertisement
85
85
[no value]
[no value]
NATIONAL CARBON COMPANY, INC.
[no value]
NATIONAL CARBON COMPANY, INC.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0148.xml
article
86
86,100
Better Shop Methods
[no value]
Some Secrets of Success in Hardening Steel
Designer of Rolling Mills and Special Machinery
Daub with Hard Soap
Treatment for Costly Dies
Reduces Chances of Cracking
[no value]
[no value]
J. A. Horton
[no value]
PopularScience_19240401_0104_004_0149.xml
advertisement
87
87
[no value]
[no value]
THE L. S. STARRETT CO.
[no value]
THE L. S. STARRETT CO.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0150.xml
article
88
88
[no value]
[no value]
Making an Inexpensive Face Mill with Inserted Teeth
Bushing a Circular Saw
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0151.xml
advertisement
88
88
[no value]
[no value]
Remington Arms Company, Inc.
[no value]
Remington Arms Company, Inc.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0152.xml
advertisement
89
89
[no value]
[no value]
Chevrolet Motor Company
[no value]
Chevrolet Motor Company
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0153.xml
article
90
90,92,94,96
[no value]
[no value]
Work-Holding Methods that Save a Machinist's Time
[no value]
[no value]
[no value]
[no value]
MANY simple, time-saving suggestions for machinists are contained in this article, based upon shop ideas developed and used by F. J. Wilhelm, production manager of a Cincinnati firm manufacturing automobile accessories, and Joe V. Romig, machine tool designer and builder.
PopularScience_19240401_0104_004_0154.xml
advertisement
90
90
[no value]
[no value]
GOODELL-PRATT CO.
[no value]
GOODELL-PRATT CO.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0155.xml
advertisement
91
91
[no value]
[no value]
MARSHALL RADIO PRODUCTS, Inc.
[no value]
MARSHALL RADIO PRODUCTS, Inc.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0156.xml
advertisement
92
92
[no value]
[no value]
THE MIDWEST RADIO COMPANY
[no value]
THE MIDWEST RADIO COMPANY
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0157.xml
advertisement
93
93
[no value]
[no value]
Advertisements
[no value]
SIMONDS SAW AND STEEL CO.
Hand Saws
SIMONDS SAW AND STEEL CO.
Circular Saws
[no value]
[no value]
PopularScience_19240401_0104_004_0158.xml
advertisement
94
94
[no value]
[no value]
BROWN & SHARPE MFG. CO.
[no value]
BROWN & SHARPE MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0159.xml
advertisement
95
95
[no value]
[no value]
IVER JOHNSON'S ARMS & CYCLE WORKS
[no value]
IVER JOHNSON'S ARMS & CYCLE WORKS
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0160.xml
article
96
96
[no value]
[no value]
Packing a Worn Rod on a Large Steam Pump
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0161.xml
advertisement
96
96
[no value]
[no value]
The Peck, Stow & Wilcox Co.
[no value]
The Peck, Stow & Wilcox Co.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0162.xml
advertisement
97
97
[no value]
[no value]
NICHOLSON FILE COMPANY
[no value]
NICHOLSON FILE COMPANY
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0163.xml
advertisement
98
98
[no value]
[no value]
NATIONAL CARBON COMPANY, INC.
[no value]
NATIONAL CARBON COMPANY, INC.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0164.xml
article
98
98
[no value]
[no value]
Simple Guide Fixture Saves Time in Tapping Nuts
Making a Heavy Plumb-Bob
[no value]
[no value]
[no value]
THIS fixture is useful in shops where contract work is done, especially where nuts have to be manufactured in quantities. Machinists are well acquainted with the procedure of making nut blanks on the screw machine, either automatic or hand; this tool is for tapping the nuts after they are drilled and cut off the bar.
PopularScience_19240401_0104_004_0165.xml
advertisement
99
99
[no value]
[no value]
Taylor Instrument Companies
[no value]
Taylor Instrument Companies
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0166.xml
advertisement
100
100
[no value]
[no value]
The Caille Perfection Motor Co.
[no value]
The Caille Perfection Motor Co.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0167.xml
advertisement
101
101
[no value]
[no value]
MUSIC MASTER CORPORATION
[no value]
MUSIC MASTER CORPORATION
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0168.xml
advertisement
102
102
[no value]
[no value]
BELL SYSTEM
[no value]
BELL SYSTEM
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0169.xml
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102
102
[no value]
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WOLLENSAK OPTICAL COMPANY
[no value]
WOLLENSAK OPTICAL COMPANY
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0170.xml
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102
102
[no value]
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SOLDERALL CO.
[no value]
SOLDERALL CO.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0171.xml
article
102
102
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Cheaply Made Valve Grinder for the Small Garage
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[no value]
Frank N. Coakley
UNTIL his work increases sufficiently to warrant the purchase of an expensive valve-grinding machine, the owner of a small garage can make at low cost a very satisfactory machine of his own, as illustrated. Fig 1. Top view of the valve-grinding machine that utilizes a small tool grinder the grinder in place.
PopularScience_19240401_0104_004_0172.xml
article
103
103
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Inserted Scales Give Added Usefulness to Surface Plate
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A METHOD of improving the most important tool in the shop—the surface plate—is shown in the accompanying illustration. The word “important” is used advisedly, as all accuracy in dimensions must start from the surface plate. A toolmaker’s square is used against the left-hand edge of the conventional surface plate.
PopularScience_19240401_0104_004_0173.xml
article
103
103
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Wax Fillets for Pattern Work Made in Simple Press
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PopularScience_19240401_0104_004_0174.xml
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103
103
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THE PALMOLIVE COMPANY
[no value]
THE PALMOLIVE COMPANY
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[no value]
[no value]
PopularScience_19240401_0104_004_0175.xml
article
104
104
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Simple V-Rest Fixture Aids in Grinding Center Punches
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PopularScience_19240401_0104_004_0176.xml
article
104
104
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Cones and Rods Form Useful Gage for Testing Axles
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FOR straightening automobile front axles, an accurate gage can be made quickly from four cones and two rods. The cones, which are turned and drilled as shown to receive the rods, should be about 2 in. in diameter at the base and 2J4 in. long, so that they will fit the average axle.
PopularScience_19240401_0104_004_0177.xml
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104
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Advertisements
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PopularScience_19240401_0104_004_0178.xml
article
105
105
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One-Piece Tool for Refitting Engine Valves
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PopularScience_19240401_0104_004_0179.xml
article
105
105
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Non-Slip Hammer Handle
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PopularScience_19240401_0104_004_0180.xml
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105
105
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BLACK & DECKER MFG. CO.
[no value]
BLACK & DECKER MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0181.xml
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106
106
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THE J. B. WILLIAMS COMPANY
[no value]
THE J. B. WILLIAMS COMPANY
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PopularScience_19240401_0104_004_0182.xml
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106
106
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w. B. & J. E. BOICE
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w. B. & J. E. BOICE
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PopularScience_19240401_0104_004_0183.xml
article
106
106
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Inserted Milling - Machine Cutters Held in Thin Blanks
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PopularScience_19240401_0104_004_0184.xml
article
106
106
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Celluloid Disks Protect Glasses from Emery Dust
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PopularScience_19240401_0104_004_0185.xml
article
106
106
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Speed Lathe for Rough Use Made from Countershaft
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PopularScience_19240401_0104_004_0186.xml
article
107
107
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Soldering Tongs Save Time in Making Electrical Splices
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PopularScience_19240401_0104_004_0187.xml
article
107
107
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Extending Small Drills
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PopularScience_19240401_0104_004_0188.xml
article
107
107
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Leather Wrench Handle
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[no value]
[no value]
PopularScience_19240401_0104_004_0189.xml
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107
107
[no value]
[no value]
General Motors Truck Co.
[no value]
General Motors Truck Co.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0190.xml
advertisement
108
108
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[no value]
Advertisement
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PopularScience_19240401_0104_004_0191.xml
article
108
108
[no value]
[no value]
Making a "Turned" Spiral Pedestal
[no value]
[no value]
[no value]
Gladstone Calif
SPIRALLY turned pedestals or legs are considered by 99 out of 100 home workers as being beyond the skill of any amateur mechanic without a lathe. Actually, however, they can be made with a few hand tools and some care. It is surprising indeed what can be made in the home workshop.
PopularScience_19240401_0104_004_0192.xml
article
109
109
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A Convenient Bench Is Essential in Any Home Workshop
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TO BUILD an ideal home workshop bench is neither difficult nor expensive if the details of POPULAR SCIENCE MONTHLY’S Blueprint No. 15 (listed below) are followed. That print was used by E. Crass, of Paducah, Ky., in building the bench illustrated, and he writes as follows:
PopularScience_19240401_0104_004_0193.xml
article
109
109
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Complete List of Blueprints
[no value]
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ANY one of the blueprints listed below can be obtained from POPULAR SCIENCE MONTHLY for 25 cents. The Editor will be glad to provide, upon request, information relative to tools, material, or equipment. Blueprint Service Dept. Popular Science Monthly 225 West 39th St., New York.
PopularScience_19240401_0104_004_0194.xml
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109
109
[no value]
[no value]
Corona Typewriter Company, Inc.
[no value]
Corona Typewriter Company, Inc.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0195.xml
article
110
110,111
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[no value]
How to Build Ornamental Flower Boxes and Brackets
[no value]
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PopularScience_19240401_0104_004_0196.xml
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110
110
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Advertisements
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PopularScience_19240401_0104_004_0197.xml
article
111
111
[no value]
[no value]
Colorful Lanterns Made of Cardboard and Paper
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PopularScience_19240401_0104_004_0198.xml
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111
111
[no value]
[no value]
R. E. THOMPSON MANUFACTURING CO.
[no value]
R. E. THOMPSON MANUFACTURING CO.
[no value]
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[no value]
PopularScience_19240401_0104_004_0199.xml
article
112
112
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Old Radius Rod Forms Unique Mounting for Drawing-Board
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PopularScience_19240401_0104_004_0200.xml
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112
112
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Advertisements
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PopularScience_19240401_0104_004_0201.xml
article
113
113
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[no value]
Ornamental Papers for Craft Work Made with Water Colors
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PopularScience_19240401_0104_004_0202.xml
article
113
113
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Emergency Fuse Plug
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[no value]
PopularScience_19240401_0104_004_0203.xml
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113
113
[no value]
[no value]
Stromberg-Carlson Telephone Mfg. Co.
[no value]
Stromberg-Carlson Telephone Mfg. Co.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0204.xml
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113
113
[no value]
[no value]
Chas. Freshman Co. Inc.
[no value]
Chas. Freshman Co. Inc.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0205.xml
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113
113
[no value]
[no value]
TERRY & CO.
[no value]
TERRY & CO.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0206.xml
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113
113
[no value]
[no value]
The Veeder Mfg. Co.
[no value]
The Veeder Mfg. Co.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0207.xml
article
114
114
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Handy Support for Sawing Is Hinged to Bench Legs
Concrete Flower Pots
Testing Dry Batteries
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[no value]
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PopularScience_19240401_0104_004_0208.xml
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114
114
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Advertisements
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PopularScience_19240401_0104_004_0209.xml
article
115
115
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Simply Made Chinese Game Racks and Counter Holders
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[no value]
PopularScience_19240401_0104_004_0210.xml
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115
115
[no value]
[no value]
DIAMOND STATE FIBRE CO.
[no value]
DIAMOND STATE FIBRE CO.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0211.xml
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115
115
[no value]
[no value]
National Stationery Co.
[no value]
National Stationery Co.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0212.xml
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115
115
[no value]
[no value]
Dixie Music House
[no value]
Dixie Music House
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[no value]
[no value]
PopularScience_19240401_0104_004_0213.xml
article
116
116,117
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[no value]
How to Construct Apparatus for Magic Pendulum Trick
[no value]
[no value]
[no value]
Kenneth B. Murray
[no value]
PopularScience_19240401_0104_004_0214.xml
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116
116
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[no value]
Advertisements
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PopularScience_19240401_0104_004_0215.xml
article
117
117
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Brush on Needle Holder Dusts Phonograph Record
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PopularScience_19240401_0104_004_0216.xml
article
117
117
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Simple Guide for Sharpening Chisels and Plane Irons
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[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0217.xml
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117
117
[no value]
[no value]
W. L. DOUGLAS SHOE COMPANY
[no value]
W. L. DOUGLAS SHOE COMPANY
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0218.xml
advertisement
117
117
[no value]
[no value]
CENTRAL AUTO SUPPLY CO.
[no value]
CENTRAL AUTO SUPPLY CO.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0219.xml
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117
117
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[no value]
Advertisement
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[no value]
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PopularScience_19240401_0104_004_0220.xml
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117
117
[no value]
[no value]
FERRY & CO.
[no value]
FERRY & CO.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0221.xml
article
118
118,119
Home Workshop Chemistry
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Simple Formulas that Will Save Time and Money
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[no value]
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THE radio fan who takes pride in constructing as much of his apparatus as he can, will find it not at all difficult to make very efficient B batteries that not only have a long life, but also can be renewed again and again for a few cents when they run down.
PopularScience_19240401_0104_004_0222.xml
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118
118
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Advertisements
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PopularScience_19240401_0104_004_0223.xml
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119
119
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Advertisements
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PopularScience_19240401_0104_004_0224.xml
article
120
120,121
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How to Get Your Gardening Tools Ready for Spring
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[no value]
Joe V. Romig
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PopularScience_19240401_0104_004_0225.xml
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120
120
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Advertisements
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PopularScience_19240401_0104_004_0226.xml
article
121
121
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Washing Photographic Prints
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PopularScience_19240401_0104_004_0227.xml
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121
121
[no value]
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ADAMS-MORGAN CO.: PARAGON
[no value]
ADAMS-MORGAN CO.
PARAGON
[no value]
[no value]
PopularScience_19240401_0104_004_0228.xml
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121
121
[no value]
[no value]
The Parks Ball Bearing Machine Company
[no value]
The Parks Ball Bearing Machine Company
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0229.xml
advertisement
121
121
[no value]
[no value]
Buffalo Specialty Co.
[no value]
Buffalo Specialty Co.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0230.xml
article
122
122
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A Toy Electric Railway Track Made in Flexible Sections
Toy Motor-Boat Made Cheaply
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PopularScience_19240401_0104_004_0231.xml
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122
122
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Advertisements
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PopularScience_19240401_0104_004_0232.xml
article
123
123
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Earns $90 Building Four Simple Smoking Cabinets
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ALTHOUGH not hard to make, the tobacco cabinet or humidor illustrated will grace any smoker's den or living-room. I have made three of these of quartered oak, for which I received $20 each, and one of walnut, which brought $30. 2 pieces, I by 10 by 20 in.
PopularScience_19240401_0104_004_0233.xml
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123
123
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Advertisements
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PopularScience_19240401_0104_004_0234.xml
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124
124
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[no value]
Arthur Murray
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Arthur Murray
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[no value]
PopularScience_19240401_0104_004_0235.xml
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124
124
[no value]
[no value]
KELLOCC SWITCHBOARD & SUPPLY COMPANY
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KELLOCC SWITCHBOARD & SUPPLY COMPANY
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0236.xml
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124
124
[no value]
[no value]
Dubilier Condenser and Radio Corporation
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Dubilier Condenser and Radio Corporation
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[no value]
[no value]
PopularScience_19240401_0104_004_0237.xml
article
124
124
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Strawberries and Other Plants Grown in a Barrel
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EVEN if you live in a congested city, with little or no gardening space, it is not necessary to forego all the pleasures of gardening. You can resort to barrel gardening, just as an ingenious resident of San Antonio, Texas, has done.
PopularScience_19240401_0104_004_0238.xml
article
124
124
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Time-Saving Jack for Doors
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PopularScience_19240401_0104_004_0239.xml
article
125
125
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This Unique Rabbit Hutch Has Hay-Rack and Feed Trough
Rubber-Capped Hammer
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[no value]
ALTHOUGH most boys at some time or other keep rabbits, few of them know how to build first-class hutches for their pets. It takes a little longer to build a good hutch like the one illustrated than to use an old box or barrel, but the result is worth while.
PopularScience_19240401_0104_004_0240.xml
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125
125
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STUDEBAKER WATCH CO.
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STUDEBAKER WATCH CO.
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[no value]
[no value]
PopularScience_19240401_0104_004_0241.xml
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125
125
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[no value]
The Chicago Ferrotype Co.
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The Chicago Ferrotype Co.
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[no value]
[no value]
PopularScience_19240401_0104_004_0242.xml
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125
125
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MARLE Engineering Company
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MARLE Engineering Company
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[no value]
PopularScience_19240401_0104_004_0243.xml
article
126
126,127
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[no value]
The Shipshape Home
Cutting Glass
Mounting an Ironing Board
Coal Windows
Preventing Back Flow
Spots on Wallpaper
Finishing Chair Seats
[no value]
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0244.xml
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126
126
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Advertisement
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PopularScience_19240401_0104_004_0245.xml
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126
126
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Advertisement
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PopularScience_19240401_0104_004_0246.xml
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126
126
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[no value]
HOBART BROS. CO.
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HOBART BROS. CO.
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PopularScience_19240401_0104_004_0247.xml
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127
127
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Advertisement
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PopularScience_19240401_0104_004_0248.xml
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127
127
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VICTOR J. EVANS & CO.
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VICTOR J. EVANS & CO.
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PopularScience_19240401_0104_004_0249.xml
article
128
128
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[no value]
A "Vintage Smoke"
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Some time ago Mr. Joe Rivers, a confirmed smoker of Edgeworth, defined the friend-making, friend-holding quality of Edgeworth as “tasty-smellfulness.” In the following letter Major Edmund simplifies this description into one word, “bouquet”—which Webster defines as “an aroma as of wine.”
PopularScience_19240401_0104_004_0250.xml
article
128
128
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[no value]
Stone Bird Bath Is Artistic Garden Ornament
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[no value]
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Herbert C. Crocker
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PopularScience_19240401_0104_004_0251.xml
article
128
128
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[no value]
Pen for Drawing Heavy Letters Whittled from Wooden Stick
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PopularScience_19240401_0104_004_0252.xml
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128
128
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Advertisements
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PopularScience_19240401_0104_004_0253.xml
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129
129
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CLARENCE A. O’BRIEN
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CLARENCE A. O’BRIEN
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PopularScience_19240401_0104_004_0254.xml
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130
130
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Advertisements
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PopularScience_19240401_0104_004_0255.xml
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131
131
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MUNN & COMPANY
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MUNN & COMPANY
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PopularScience_19240401_0104_004_0256.xml
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131
131
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RANDOLPH & CO.
[no value]
RANDOLPH & CO.
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[no value]
PopularScience_19240401_0104_004_0257.xml
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132
132
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Advertisements
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PopularScience_19240401_0104_004_0258.xml
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133
133
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SANTA FE WATCH COMPANY
[no value]
SANTA FE WATCH COMPANY
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0259.xml
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133
133
[no value]
[no value]
American RADIO Mfg. Co.
[no value]
American RADIO Mfg. Co.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0260.xml
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133
133
[no value]
[no value]
W. F. YOUNG. INC.
[no value]
W. F. YOUNG. INC.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0261.xml
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134
134
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Advertisements
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PopularScience_19240401_0104_004_0262.xml
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135
135
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PopularScience_19240401_0104_004_0263.xml
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135
135
[no value]
[no value]
CALIFORNIA TRADING CO.
[no value]
CALIFORNIA TRADING CO.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0264.xml
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135
135
[no value]
[no value]
First Hawaiian Conservatory of Music, Inc.
[no value]
First Hawaiian Conservatory of Music, Inc.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0265.xml
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136
136
[no value]
[no value]
Advertisements
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PopularScience_19240401_0104_004_0266.xml
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137
137
[no value]
[no value]
Larkin Co., Inc.
[no value]
Larkin Co., Inc.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0267.xml
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137
137
[no value]
[no value]
John L. Whiting-J. J. Adams Co.
[no value]
John L. Whiting-J. J. Adams Co.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0268.xml
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137
137
[no value]
[no value]
AIR-FRICTION CARBURETOR CO.
[no value]
AIR-FRICTION CARBURETOR CO.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0269.xml
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137
137
[no value]
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PopularScience_19240401_0104_004_0270.xml
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138
138
[no value]
[no value]
MARSHALL STILLMAN ASSOCIATION
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MARSHALL STILLMAN ASSOCIATION
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0271.xml
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138
138
[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_19240401_0104_004_0272.xml
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138
138
[no value]
[no value]
Metallic Letter Co.
[no value]
Metallic Letter Co.
[no value]
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[no value]
PopularScience_19240401_0104_004_0273.xml
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139
139
[no value]
[no value]
The Fate-Root-Heath Company
[no value]
The Fate-Root-Heath Company
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0274.xml
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139
139
[no value]
[no value]
AMERICAN TOP AND BODY CO.
[no value]
AMERICAN TOP AND BODY CO.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0275.xml
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139
139
[no value]
[no value]
Elto Outboard Motor Co.
[no value]
Elto Outboard Motor Co.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0276.xml
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139
139
[no value]
[no value]
MORRISON LABORATORIES, INC.
[no value]
MORRISON LABORATORIES, INC.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0277.xml
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140
140
[no value]
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Electrical Research Laboratories
[no value]
Electrical Research Laboratories
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0278.xml
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140
140
[no value]
[no value]
THE FYR-FYTER COMPANY
[no value]
THE FYR-FYTER COMPANY
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PopularScience_19240401_0104_004_0279.xml
article
141
141
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Here Are Correct Answers to Questions on Page 29
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1. Color is caused by differences in the length of light waves. Our eye sees the longer waves as red; the shorter, as orange, etc. The shortest waves of visible light are violet. White light consists of light of all the colors. 2. The explosion of dynamite is very different from burning; it is a kind of disintegration.
PopularScience_19240401_0104_004_0280.xml
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141
141
[no value]
[no value]
NATIONAL CARBON COMPANY, INC.
[no value]
NATIONAL CARBON COMPANY, INC.
[no value]
[no value]
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PopularScience_19240401_0104_004_0281.xml
tableOfContents
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142
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In This Issue
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PopularScience_19240401_0104_004_0282.xml
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142
142
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GENERAL ELECTRIC
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GENERAL ELECTRIC
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PopularScience_19240401_0104_004_0283.xml
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142
142
[no value]
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QUICKEDGE SHARPENER CO.
[no value]
QUICKEDGE SHARPENER CO.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0284.xml
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143
143
[no value]
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THE MAGNAVOX CO.
[no value]
THE MAGNAVOX CO.
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PopularScience_19240401_0104_004_0285.xml
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144
144
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[no value]
OLIVER OIL-GAS BURNER CO.
[no value]
OLIVER OIL-GAS BURNER CO.
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0286.xml
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145
145
[no value]
[no value]
EISEMANN MAGNETO CORPORATION
[no value]
EISEMANN MAGNETO CORPORATION
[no value]
[no value]
[no value]
PopularScience_19240401_0104_004_0287.xml
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146
146
[no value]
[no value]
COLGATE & CO.
[no value]
COLGATE & CO.
[no value]
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PopularScience_19240401_0104_004_0288.xml
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147
147
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PopularScience_19240401_0104_004_0289.xml
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148
148
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PopularScience_19240401_0104_004_0290.xml