Issue: 19280401

Sunday, April 1, 1928
April 1928
4
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112
Tuesday, December 16, 2014

Articles
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Popular Science MONTHLY
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PopularScience_19280401_0112_004_0001.xml
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DETROIT WHITE LEAD WORKS: Rogers Brushing Lacquer
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DETROIT WHITE LEAD WORKS
Rogers Brushing Lacquer
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PopularScience_19280401_0112_004_0002.xml
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1
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GENERAL MOTORS: CADILLAC
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GENERAL MOTORS
CADILLAC
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PopularScience_19280401_0112_004_0003.xml
tableOfContents
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2,3
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WHAT IS NEW THIS MONTH
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PopularScience_19280401_0112_004_0004.xml
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4
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THE F. H. SMITH CO.
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THE F. H. SMITH CO.
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PopularScience_19280401_0112_004_0005.xml
article
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4,6,7
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A Plan that puts the $100 Man on a Par with the Big Investor
For the $100 and the $1000 Man
Making Diversification Easy for the Small Investor
To Help You Get Ahead
How Diversification Pays Profits
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WALLACE AMES
OH ROY! Do stop the car here for a minute and let’s take in this view.” "Four thousand miles of scenery and you’re not fed up yet,” said Roy Dunn to his wife, Amy, as he brought the car to a halt in the middle of the Bear Mountain Bridge. “I’ll never get fed up on a sight like this,” replied Amy, as her eye swept in the magnificent panorama, first down the Hudson and then upstream.
PopularScience_19280401_0112_004_0006.xml
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5
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INVESTORS SYNDICATE
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INVESTORS SYNDICATE
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PopularScience_19280401_0112_004_0007.xml
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6
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Cochran &. McCluer Co.
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Cochran &. McCluer Co.
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PopularScience_19280401_0112_004_0008.xml
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6
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Advertisement: POPULAR SCIENCE MONTHLY
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POPULAR SCIENCE MONTHLY
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PopularScience_19280401_0112_004_0009.xml
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7
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UNITED STATES MORTGAGE BOND COMPANY
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UNITED STATES MORTGAGE BOND COMPANY
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PopularScience_19280401_0112_004_0010.xml
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7
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FIDELITY BOND AND MORTGAGE CO.
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FIDELITY BOND AND MORTGAGE CO.
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PopularScience_19280401_0112_004_0011.xml
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7
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UNITED STATES FISCAL CORPORATION
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UNITED STATES FISCAL CORPORATION
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PopularScience_19280401_0112_004_0012.xml
article
8
8
LEADING ARTICLES
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HOW TO TELL A GOOD REFRIGERATOR
The Institute Tests Reveal Astonishing Facts About Household Refrigerators
The Institute Finds Out
Most Refrigerators in Use Are Inefficient
Good Refrigerators
Popular Science Monthly GUARANTEE
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MOST people realize that they should have a refrigerator in their home. They know that if they do not keep food cold it will spoil, and that this is a waste and expense. But they do not know that they may eat food which, although it tastes all right, may have started to spoil and eating it will make them sick.
PopularScience_19280401_0112_004_0013.xml
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9
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MASON FIBRE COMPANY: Masonite PRESDWOOD
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MASON FIBRE COMPANY
Masonite PRESDWOOD
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PopularScience_19280401_0112_004_0014.xml
article
10
10
LEADING ARTICLES
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Our Readers Say-
Can Radio Harm Us?
Give the Man a Chance
The War Is On
Ten Years Ago—
Why Not Paint the Town?
Page Mr. Paus
Where Germs Lurk
Pleasure That Lasts
Courage
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I READ the other day of two different experiments in which it was found that radio waves affect the human body. In one case Professor McLennan of the University of Toronto claimed he discovered that long radio waves raise the body temperature and so might be used to kill disease.
PopularScience_19280401_0112_004_0015.xml
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11
11
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Advertisements
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Taylor Instrument Companies
Tycos Office Thermometers
Taylor Instrument Companies
Tycos Hygrometer
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PopularScience_19280401_0112_004_0016.xml
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12
12
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A. H. Grebe & Company, Inc.: The Grebe Synchrophase A-C Six
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A. H. Grebe & Company, Inc.
The Grebe Synchrophase A-C Six
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PopularScience_19280401_0112_004_0017.xml
article
13
13,14,124,125
LEADING ARTICLES
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Lindbergh—How He Does It; An Amazing Revelation
HERE are answered the questions everybody has been asking in recent months—How does “Lindy” always succeed; always fly where he says he will, when he says he will? It is a fascinating story of the two sides of the famous aviator
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CALEB JOHNSON
“SLIM” LINDBERGH, an unknown aviator, took off from Roosevelt Field on the morning of May 20, 1927, and landed at Paris the following night. Colonel Charles A. Lindbergh came back from Paris on the Memphis a world-famous hero. Everybody has been reading about Colonel Lindbergh ever since.
PopularScience_19280401_0112_004_0018.xml
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15
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From the Camera’s Panorama
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PopularScience_19280401_0112_004_0019.xml
article
16
16,17,18,138,139,140,141,142,143
FICTION
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"The Make Must Go On”
A Real Story of a Dramatic Day Amid Flaming Blasts in the Gas Works
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F. N. LITTEN
BENEATH the grimy slate roof of the Twenty-third Street Works, the gas machines roared as the air blast thundered through them. The blast, driving up through the machines, fanned the red coke within to white heat, and flamed out the stack. Then, as the flame died, the run began transforming coke, steam and fire into a genie, greater than Aladdin’s lamp could summon, who, invisible, served a million homes.
PopularScience_19280401_0112_004_0020.xml
article
19
19
LEADING ARTICLES
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Tunnel Built, Then Sunk in Bay
Golden Gate Tube Laid in Sections In Unparalleled Engineering Exploit
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H. H. DUNN
EARLY this summer Californians will celebrate the opening of the most remarkable underwater highway, in many respects, that engineers have ever attempted. It is the $4,500,000 Oakland-Alameda Estuary Tube, running nearly three fourths of a mile under old San Antonio Creek, an arm of San Francisco Bay, and replacing the Webster Street Bridge, which now links the two cities.
PopularScience_19280401_0112_004_0021.xml
article
20
20,21,143
LEADING ARTICLES
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Television Brought Into the Home—The Newest Radio Marvel
RADIO STEREOPTICON, TOO
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ALDEN P. ARMAGNAC
NOW you are to have a see-by-radio outfit of your own —a device that will enable you to view the prima donna and the musician in a distant broadcasting station just as plainly as your radio receiver permits you to hear them. Engineers are putting the finishing touches on a home television cabinet that they are preparing to make and market by the thousand!
PopularScience_19280401_0112_004_0022.xml
article
22
22,23,24
LEADING ARTICLES
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Dangers That Lurk In the Family Icebox
Popular Science Investigation Reveals Startling Facts about Household Refrigeration and Your Health
Choosing An Icebox
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FREDERIC DAMRAU
FOOD in nine out of ten families in this country is kept in such a way as to be a menace to their health. That statement is not the cry of an alarmist. It is made only after the most exhaustive investigation into household refrigeration ever undertaken anywhere in the world; an investigation which reveals the startling fact that in most American homes food frequently becomes unwholesome and sometimes even poisonous, because of inadequate refrigeration.
PopularScience_19280401_0112_004_0023.xml
article
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25
LEADING ARTICLES
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Sea Whippets Thrill in Newest Sport
Speedy Little "Kickers” Leap Madly Over Waves in Spectacular Contest
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ELLSWORTH BENNETT
LEAPING and plunging recklessly through white-capped waves, kicking the choppy sea into spray, more than a score of the world's smallest speed boats recently engaged in one of the most spectacular contests ever seen in American waters. It was the race of tiny outboard motor boats, familiarly called “kickers,” run over a fifty-two-mile course on the lee side of Santa Catalina Island, off the coast of southern California.
PopularScience_19280401_0112_004_0024.xml
article
26
26,27,154,155
LEADING ARTICLES
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"Can I Afford an Airplane?"
Amateur Pilots Throughout the Land Explain Here the Dollars and Cents of Private Flying
What the Figures Show
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H. C. DAVIS
FLYING for pleasure! Who has not dreamed of owning and running his own airplane? Each morning the papers tell you of airmen’s latest exploits. “I could do that, too,” you confide to yourself. After all, why not? Over your head passes the air mail.
PopularScience_19280401_0112_004_0025.xml
article
28
28
LEADING ARTICLES
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A Loudspeaker for a Million Ears
Mighty “Hello" Heard a Mile in First Test of New Device for Use of Public Speakers
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R. C. UPJOHN
"HELLO, ferryboat!” boomed a tremendous voice across the Hudson River the other day, from a horn atop a New York building. Ferry passengers jumped in startled surprise at the Gargantuan shout, then waved at the New York skyline whence the sound had come.
PopularScience_19280401_0112_004_0026.xml
article
29
29,30,157
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Plants That See, Feel and Think
Scientists Stand Amazed as Hindu Botanist Records Emotions of Growing Things by Means of His Strange Electrical Machines
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ARTHUR A. STUART
IS THE potato a little stepbrother to man? Is the cabbage our second cousin: Should we recognize vegetables as our poor but honest relations? “Yes,” calmly asserts Sir Jagadis C. Bose, a Hindu scientist of international repute, who for a quarter of a century has been doing sensational and thrilling things with plants.
PopularScience_19280401_0112_004_0027.xml
article
31
31,128
LEADING ARTICLES
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Sky scrapers Built While Tenants Wait
Astounding Engineering Feats Put Giant Buildings Around and Atop One Another and on Pine Log Legs
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PETER VISCHER
ONE of the mightiest of skyscrapers—the New York Life Insurance Building nearing completion on the site of the old Madison Square Garden—stands knee-deep in the biggest hole ever dug into the vitals of Manhattan Island. Beholding it, one marvels at the engineering magic that reared this vast pyramid of steel and stone, surmounted by a tower that reaches 610 feet into the sky.
PopularScience_19280401_0112_004_0028.xml
article
32
32,33
LEADING ARTICLES
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Beating Death at the Sea’s Bottom
Thrilling Exploit That Won Eadie a Medal as Hero of S-4 Disaster Only a Sample of Divers’ Perilous Tasks — How Ellsberg Twice Faced Death Below
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ROBERT E. MARTIN
ONE of America’s highest awards for valor, the Congressional Medal of Honor, is to go to a new hero— Chief Torpedoman Thomas Eadie, veteran deep-sea diver of the Navy. It is a tribute to the almost superhuman skill and courage of the man who, when the submarine S-4 sank off Provincetown, Mass., last December, risked and all but lost his life, first in an attempt to carry aid to the six men imprisoned in the submarine, then to rescue a fellow diver trapped in the muddy depths.
PopularScience_19280401_0112_004_0029.xml
article
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34,35,127
LEADING ARTICLES
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Fontaine Fox Insists He Is an Inventor
HERE IS AN Article That Will Make You Smile and Then Stop and Think. In It Mr. Fox, the Newspaper Cartoonist Whose Toonerville Trolley and Other Caricatures Amuse Thousands of Us Daily, Explains What an Understanding of the Human Interest in Mechanical Things Has Meant to Him
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IF THERE is an inventors’ guild I can qualify for membership, but I couldn't be an officer because I am too busy inventing. Edison, McCormick, Marconi, Bell, Ford, and the forgotten genius who first devised a folding bed are all right in their way, but the lot of them did not invent so many things as (let the band sound flourishes and ruffles) Fontaine Fox.
PopularScience_19280401_0112_004_0030.xml
article
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36
LEADING ARTICLES
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Hypnotism Gives Aid to Surgeon
Patient Spared Suffering in Chicago Doctor’s Astounding Experiment with Anesthesia — Will Profession Adopt His Method?
Your Ears Prove Your Identity
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GROVER C. LANGE
IN ST. LUKE’S HOSPITAL in Chicago, a few weeks ago, a young woman facing a major operation for abdominal adhesions was hypnotized as she lay on the operating table. For almost an hour she rested in wide-eyed hypnotic sleep, while Dr. Harold G. Jones made an incision, severed the adhesions and completed the operation without the use of any drug or anesthetic.
PopularScience_19280401_0112_004_0031.xml
article
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37,38,131
LEADING ARTICLES
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Keeping Trains Out of Wrecks
Hair-Raising Incidents We Never Hear Of and Ingenious Machines Being Used to Protect Us
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JESSE F. GELDERS
IN FOSTORIA, Ohio, a man sits before a queer machine looking like a combination telephone switchboard and miniature railway. Lights flash—the operator moves markers along diagrams of railroad tracks and pulls levers. On sectors of track above the diagrams switches open and close.
PopularScience_19280401_0112_004_0032.xml
article
39
39
LEADING ARTICLES
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Flying Wounded Troops Through Snipers’ Bullets
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HYATT E. GIBSON
TWO airplanes in Nicaragua, one circling like a wasp to fight off attackers, the other roaring into the air with a load of wounded United States marines, wrote a new chapter of heroism and resourcefulness into the annals of aviation the other day, and showed that an airplane could serve as a messenger of mercy as well as an instrument of warfare.
PopularScience_19280401_0112_004_0033.xml
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40,41
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A Month’s Harvest of New Ideas and Strange Facts
MECHANICAL Chemist Serves in Place of Experts — “Magic Carpet” Helps Growth of Plants Five Hundred Percent — Airplanes Used by Reindeer “Cowboys” on Alaskan Ranges — Eclipse Scheduled to the Minute Years in Advance
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Latest discoveries and inventions in varied fields of science, and newest applications of knowledge gained by research—all of peculiar interest because of their direct bearing on our daily life—are recorded from month to month in these pages.
PopularScience_19280401_0112_004_0034.xml
article
40
40
Aviation
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Airplane Cowboys Herd Reindeer
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AIRPLANES are playing still another rôle. On the reindeer ranches of Alaska and northern Canada they are serving as swift mounts for the “cowboys” who ride the range. Ralph Lomen, pioneer in the now rapidly growing Alaskan reindeer industry, reports that his head herdsman, riding a plane, recently completed in two hours work which ordinarily would require the services of seven herdsmen for a week.
PopularScience_19280401_0112_004_0035.xml
article
40
40
New Processes and Inventions
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“Magic Carpet” Aids Crops
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DR. L. H. FLINT, of the U. S. Department of Agriculture, reports the success, in three years’ experiments, of a “magic carpet” which, when spread over the soil, increases the yield of garden crops as much as 500 percent and more. The carpet is of heavy waterproof paper. Covering all of the ground not occupied by the plant stems themselves, it increases the soil temperature, prevents loss of moisture, distributes water among the plants and smothers weeds. The increases in yield have varied from eleven percent for peas, to 516 percent for spinach.
PopularScience_19280401_0112_004_0036.xml
article
40
40
Unusual Facts and Ideas
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Much of World Unexplored
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SUFFERING bitter hardships, including cold of seventy degrees below zero, Russian explorers have discovered a great 600-mile mountain range rising from trackless wastes of Siberia. Within a few months an expedition of Tulane University, New Orleans, will plunge into unexplored jungles of Central America and Mexico, seeking ruins of ancient Maya cities which flourished 1500 years ago.
PopularScience_19280401_0112_004_0037.xml
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40
40
Unusual Facts and Ideas
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Social Brain Best
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WHAT is the secret of success in life? A new answer to this old question was given recently by Dr. Fred A. Moss, of George Washington University, in a report read to a meeting of the American Psychological Association in Columbus, Ohio. According to Dr. Moss, success depends largely on a man’s ability to understand others and to get along with them.
PopularScience_19280401_0112_004_0038.xml
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40
40,41
Unusual Facts and Ideas
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Brains Mean Death, Asserts Dr. Carrel
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FOR centuries mortals have searched for the fountain of eternal youth. Will it ever be found? Dr. Alexis Carrel, the great biologist of the Rockefeller Institute for Medical Research, thinks not. “Death.” he told the recent Race Betterment Conference at Battle Creek, Mich., “is the price we have to pay for the possession of brains.”
PopularScience_19280401_0112_004_0039.xml
article
41
41
Laboratory Discoveries
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Picked Fruit Keeps on Living
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FRESH picked fruits are living things. They breathe and give off heat, much as human bodies do. Half a dozen barrels of fresh apples will produce as much heat in the course of a day as fifty pounds of coal burned in a stove! Those surprising facts were revealed to the London Physical Society recently by Dr. Ezer Griffiths, who has been studying methods of shipping perishable fruits over long distances.
PopularScience_19280401_0112_004_0040.xml
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41
Health and Hygiene
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Expert Vindicates Coffee
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PROF. RALPH H. CHENEY, of the Biology Department of New York University, has completed a study of coffee and its effects on animals and men, and has reached this verdict: Far from being harmful, the cup of coffee, if not abused, is actually beneficial to most people.
PopularScience_19280401_0112_004_0041.xml
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41
Astronomy
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Eclipse Scheduled to Minute
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MODERN astronomers with their telescopes survey the heavens with uncanny accuracy. The exact path of the next total eclipse of the sun to be seen in the United States has just been charted by Dr. L. J. Comrie, of the British Nautical Almanac office.
PopularScience_19280401_0112_004_0042.xml
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41
Unusual Facts and Ideas
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Electric Power by Balloon
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AN ITALIAN inventor’s novel solution to the farmer’s problem of supplying electric power to drive plows or tractors by electricity is to feed the current over a cable of aluminum wire supported in the air by balloons. Storage battery driven apparatus has been found too expensive to install in experiments conducted abroad.
PopularScience_19280401_0112_004_0043.xml
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42,126
LEADING ARTICLES
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How Do they Know about Atoms?
They Don't! At Least, There Is No Direct Proof, But Here You Can Find the Answer to Your Question
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GEORGE LEE DOWD
BEFORE you lies a pound of copper—a reddish, shining metal lump. To your eye, it seems solid enough. If anyone told you that pound of copper was for the most part empty space, that it was inhabited only by countless swarms of tiny buzzing particles of matter that gave it its shape and weight, you could hardly be blamed for incredulity.
PopularScience_19280401_0112_004_0044.xml
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43
43,44
LEADING ARTICLES
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Hurtling through Space In a Parachute
Newest Tests Prove Jumper Can Somersault Thousands of Feet Safely; Anyone Can Learn How
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L. G. POPE
THREE quarters of a mile straight down, hurtling head over heels through empty space! Then a jerk of a cord, and a great silk envelope opening overhead to check the dizzying plunge. That was the experience, the other day, of John Tranum, crack parachute jumper, when he stepped off the wing of an airplane circling less than a mile above Los Angeles.
PopularScience_19280401_0112_004_0045.xml
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45,158
LEADING ARTICLES
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Strange Radio Devices Locate Buried Treasure
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ALBERT HENRY KINGERLY
CAN radio waves and dynamite reveal buried treasures of gold, oil, and copper? “Yes,” is the startling answer of mining experts in various parts of the world. A prominent Swedish geophysicist, armed with a radio device, has discovered, buried beneath a swamp, what may prove to be the richest arsenic deposit in the world.
PopularScience_19280401_0112_004_0046.xml
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46,47,48,144,146,147,148,149,150,151,152
FICTION
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The Movie Maker
A Thrilling Novel of Screen Magic
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S. W. NEWMEYER
AMBITIOUS to produce a big feature picture, Don Kennedy, young COMEDY director of Popular Players’ West Coast Studio, and Judy Burke, his script girl, joined in a gamble for high stakes. Don’s chief asset was an invention for superimposing action photographed in the studio upon scenic backgrounds filmed abroad—an invention that promised great economies.
PopularScience_19280401_0112_004_0047.xml
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49
LEADING ARTICLES
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Plans to Cross Ocean in 60 Hours
Frenchman’s Unsinkable Ocean-Glider Will Dash from France at Seventy Knots an Hour in a Few Weeks, Declares Inventor
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EDWIN KETCHUM
PARIS to New York in sixty hours! That is the mark set for himself by Adrien Remy, French inventor of a new type of speed boat, whose craft is shortly to undertake the trans-Atlantic passage. Already at a marine works on SaintOuen, near Paris, finishing touches are being applied to the full-size vessel that grew out of Remy’s first plans.
PopularScience_19280401_0112_004_0048.xml
article
50
50,51,129
LEADING ARTICLES
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Wonder Stories in the Making
Marvels Come Not Singly but in Scores as Two Thousand Scientific Leaders in Conference Tell of Discoveries
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FRANK PARKER STOCKBRIDGE
I USED to think of scientists as whiskered hermits or spectacled grouches, as most people do who don’t know them. I have just spent a week with two thousand of them at Nashville, Tennessee, at the 84th annual meeting of the American Association for the Advancement of Science.
PopularScience_19280401_0112_004_0049.xml
article
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52
Engineering
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New Highway Runs through a Skyscraper
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TRAFFIC will pass directly through a skyscraper in a unique project now under construction in the very heart of New York City. One of the principal highways of the city, leading to a great railroad terminal, the Grand Central Station, is to pierce the thirty-two-story structure with twin tunnels.
PopularScience_19280401_0112_004_0050.xml
article
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52
Astronomy
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Meteorite Wrecks Garage Repair Car
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WHEN Reese Worick, a Lexington, Ky., garage man, was attaching the derrick of his wrecking car to a disabled automobile on a country road recently, there was a loud report, and his machine was struck by what he supposed was a bolt of lightning.
PopularScience_19280401_0112_004_0051.xml
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52
Astronomy
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The Moon Makes Clocks Vary
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AFTER an exhaustive study of the running of clocks through long periods, Dr. Robert R. Morgan, of the Naval Observatory, Washington, reaches the astonishing conclusion that they go more slowly when the moon is in the western part of the sky. The difference, however, can be detected only by the most delicate measuring instruments.
PopularScience_19280401_0112_004_0052.xml
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52
Automobiles
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Know Your Car
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THE modern motor car engine is equipped with several devices that materially reduce the amount of carbon that ordinarily would be deposited on cylinder head and pistons. In spite of modern improvements, the motor still will carbonize rapidly if certain precautions are not observed.
PopularScience_19280401_0112_004_0053.xml
article
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52
Automobiles
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Toy Cars Teach Traffic Rules
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TOY automobiles and trolleys are the latest devices great cities are using to teach their drivers safety. The applicant for a license to drive a motor car in Los Angeles must now demonstrate his ability to meet emergencies and his knowledge of traffic laws by maneuvering a model car on a table representing a busy highway.
PopularScience_19280401_0112_004_0054.xml
article
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53,156
Unusual Facts and Ideas
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How Much Do You Know of the World You Live In?
Here Are Correct Answers to Questions on Page 53
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TEST your knowledge with these questions, chosen from hundreds sent in by readers. Correct answers are on page 156. 1. What great capital city was built in a swamp? 2. Where is the densest forest in the world? 3. What American island is more than seven miles high?
PopularScience_19280401_0112_004_0055.xml
article
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53
Automobiles
[no value]
Stile for Motor Cars Only
[no value]
[no value]
[no value]
[no value]
A NEW style stile has appeared on the farms of Willard and John Deaver, at Viroqua, Wis. Utilizing the principle of the garage greasing platform, these farmers have built novel bridges over their fences, thus enabling them to drive from the road into their barnyard and to their garages without the trouble of getting out to open and close the gates.
PopularScience_19280401_0112_004_0056.xml
article
53
53
Automobiles
[no value]
Old Motor Car Frames Make Breakwater
[no value]
[no value]
[no value]
[no value]
WHEN the Platte River recently became unruly near Fremont, Neb., it was found that discarded automobile frames wired together and anchored to the shore served to catch driftwood and sediment and form a breakwater.
PopularScience_19280401_0112_004_0057.xml
article
53
53
Automobiles
[no value]
Simple Auto Bearing Test
[no value]
[no value]
[no value]
[no value]
IT IS now possible to test automobile bearings for play or looseness without taking the parts down. A cleverly constructed gage accomplishes the work easily and quickly, as shown in the photos below, with only the cylinder head of the engine removed.
PopularScience_19280401_0112_004_0058.xml
article
53
53
Unusual Facts and Ideas
[no value]
How Cyclones Grow
[no value]
[no value]
[no value]
[no value]
TWO mysteries about cyclones and cyclonic storms that have long defied solution have just been explained by Dr. W. J. Humphreys, meteorological physicist of the U. S. Weather Bureau, who, after study of the records of such storms covering many years, is able to show why they grow in size and intensity as they move northeastward and why the increase is greater by night.
PopularScience_19280401_0112_004_0059.xml
article
53
53
RADIO
[no value]
Law Bars Radio Interference
[no value]
[no value]
[no value]
[no value]
THE first law prohibiting the running of machines that interfere with radio reception is claimed by Fairfield, Iowa. As is well known, the operation of electrical machinery in the neighborhood of a receiving set often causes interference and spoils an evening’s program ; nothing can be done about it unless the offending machine can be turned off.
PopularScience_19280401_0112_004_0060.xml
article
53
53
New Processes and Inventions
[no value]
Self-Winding Watch
[no value]
[no value]
[no value]
[no value]
A WATCH that winds itself is the amazing invention just reported by Karl Heinrich Meyer, a Swiss watchmaker, who, if his claims are true, has added one more to the imposing list of achievements of a people whose name has become almost synonymous with the word “watch.”
PopularScience_19280401_0112_004_0061.xml
article
54
54
Unusual Facts and Ideas
[no value]
Jumbo of Roller Bearings
[no value]
[no value]
[no value]
[no value]
PROBABLY the largest of its kind in the world is the gigantic roller bearing recently completed by an Ohio firm as one of a set to be installed in a huge cement mill. It has a diameter of more than five feet, and two tons of force is required to lift it.
PopularScience_19280401_0112_004_0062.xml
article
54
54
Engineering
[no value]
New Bridge Inside Old One
[no value]
[no value]
[no value]
[no value]
ONE of the most singular of modern bridge building exploits has been decided upon by engineers who will borrow one of Nature’s peculiar methods in replacing an old structure at Bound Brook, N. J., that carries interurban lines and vehicles.
PopularScience_19280401_0112_004_0063.xml
article
54
54
Aviation
[no value]
Lighter Aluminum for Planes
[no value]
[no value]
[no value]
[no value]
A NEW aluminum alloy so much lighter than any heretofore known that it will revolutionize flying is claimed by Dr. Max Wurmbach, a Munich metallurgist, who declares that while it is lighter than any other metal known, it is stronger than iron.
PopularScience_19280401_0112_004_0064.xml
article
54
54
RADIO
[no value]
Radio Photos by Air Jet
[no value]
[no value]
[no value]
[no value]
RADIO engineers at a recent convention in New York City were amazed when they sat in a theater and saw photographs transmitted by radio and so enlarged that they covered a screen that filled the stage. The demonstration was by Captain Richard H. Ranger, inventor of the Ranger system of radio photo transmission and an engineer of the Radio Corporation of America.
PopularScience_19280401_0112_004_0065.xml
article
54
54
Aviation
[no value]
$400 Aero Fare to England
[no value]
[no value]
[no value]
[no value]
EVEN the rates of fare have been tentatively decided upon, so certain are the builders of the British super-airship, the R-100, twice as large as any other dirigible, that they will establish transAtlantic service. Commander Charles Burney declared in a recent statement that his company, which built the R-100 for the British Government, had decided to exercise its option to buy the craft for its own operation.
PopularScience_19280401_0112_004_0066.xml
article
54
54
New Processes and Inventions
[no value]
Complicated Bottle Machine Makes One Million in Week
[no value]
[no value]
[no value]
[no value]
MORE than a million bottles a week each may be manufactured by two remarkable machines built in England for use in Japan! The mechanisms are staggering to the imagination in their complicated mass, yet Francis Redfern, their inventor, has had no previous experience in machine construction.
PopularScience_19280401_0112_004_0067.xml
article
54
54
New Processes and Inventions
[no value]
Rail Tickets Printed on Spot
[no value]
[no value]
[no value]
[no value]
RAILWAY stations need no longer go to the trouble of stocking thousands of tickets, now that an ingenious automatic machine has been introduced that prints the traveler’s ticket as he steps to the window and names the city to which he is going.
PopularScience_19280401_0112_004_0068.xml
article
54
54
Unusual Facts and Ideas
[no value]
Your Queries Answered
[no value]
[no value]
[no value]
[no value]
THIS magazine is glad whenever possible to answer reader’s inquiries regarding subjects within its scope, and to supply names and addresses of manufacturers of articles described in its pages. Enclose self-addressed stamped envelope and address Information Department, POPULAR SCIENCE MONTHLY, 250 Fourth Avenue, New York City.
PopularScience_19280401_0112_004_0069.xml
article
55
55
Unusual Facts and Ideas
[no value]
Bird Flies Across Atlantic Before It Is 3 Months Old
[no value]
[no value]
[no value]
[no value]
AN AMAZING 4200-mile trans-Atlantic flight of a bird, recently announced by the Biological Survey, shows that even Lindbergh has something to learn from feathered flyers. An Arctic tern between one and five days old was banded and released July 22, 1927, at the Red Islands, Turnevick, Labrador, by O. L. Austin, visiting the birds’ breeding grounds for the Survey.
PopularScience_19280401_0112_004_0070.xml
article
55
55
New Processes and Inventions
[no value]
Steel Scaffolds Replace Wood
[no value]
[no value]
[no value]
[no value]
SCAFFOLDING of steel tubes rather than wood has now been developed to eliminate fire danger, warping, and failures of structure that have caused many fatalities. The long metal tubes, fitted together with couplings and collars, as shown below in the photograph, make a framework of great strength.
PopularScience_19280401_0112_004_0071.xml
article
55
55
New Processes and Inventions
[no value]
Hiking Cane Has Tail-Light
[no value]
[no value]
[no value]
[no value]
FROM Europe come reports of three new inventions that, while probably not revolutionary, should certainly take prizes among the month's quaint and curious products of the inventive mind. Among patents recently granted in England is one for a walking stick with a red tail-light for persons walking on highways.
PopularScience_19280401_0112_004_0072.xml
article
55
55
New Processes and Inventions
[no value]
Machine Tests Marcel Waves
[no value]
[no value]
[no value]
[no value]
HAIR tension tests may be the next addition to the staggering list of offerings of barber and beauty shops. Since marcelling is said to make the hair brittle, we now have this highly sensitive machine whose indicators show the degree of strain the tresses can undergo.
PopularScience_19280401_0112_004_0073.xml
article
55
55
Unusual Facts and Ideas
[no value]
Porcupines Don't Shoot Quills
[no value]
[no value]
[no value]
[no value]
THE popular belief that porcupines shoot their quills is a myth, according to Vernon Bailey, distinguished zoologist, of Washington, D. C. “When met with.” he says, “the porcupine tries to escape, but if crowded it bristles up, erects its quills and stands at bay. As the enemy approaches within reach fierce blows of the heavily armed tail are struck and the barbed quills are thus driven into anything within reach.”
PopularScience_19280401_0112_004_0074.xml
article
55
55
Unusual Facts and Ideas
[no value]
Steel Balls Bombard Nonbreaking Goggles
[no value]
[no value]
[no value]
[no value]
TESTING the strength of goggle lenses by dropping a steel ball on them was an unusual experiment performed in Chicago recently when the National Committee for the Prevention of Blindness met with the National Safety Council to discuss eye hazards in industrial occupations.
PopularScience_19280401_0112_004_0075.xml
article
55
55
New Processes and Inventions
[no value]
New Smoke Alarm
[no value]
[no value]
[no value]
[no value]
A NOVEL new use for the photo-electric cell has been found in Pittsburgh, where it is employed in a newly invented device to warn engineers of industrial plants when smoke from their chimneys is exceeding the density allowed by law. A beam of light is kept constantly in the chimney and pointed at a photo-electric cell, which is so sensitive that it sends to the engine room an exact record of the density of smoke. The transmission is made by an electric current that the cell operates.
PopularScience_19280401_0112_004_0076.xml
article
56
56,57
[no value]
[no value]
New Inventions That Everyone Can Find Useful
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0077.xml
article
58
58
New Processes and Inventions
[no value]
New Motorcycle Machine Gun
[no value]
[no value]
[no value]
[no value]
BOTH quick arrival on the scene of action and fast retreat are possible with the new motorcycle machine guns recently added to French army corps. Besides the important feature of the ease of portability of the light but deadly rifles is a special universal mounting that gives high elevation and enables the gunner to train his weapon on enemy planes as well as infantry.
PopularScience_19280401_0112_004_0078.xml
article
58
58
Engineering
[no value]
Air Unearthing Buried City
[no value]
[no value]
[no value]
[no value]
COMPRESSED air excavating apparatus has been pressed into service by men working under the direction of Prof. Amedeo Maiuri, eminent Italian archeologist, in the latest effort to uncover the centuries-old ruins of Herculaneum, near Naples, Italy.
PopularScience_19280401_0112_004_0079.xml
article
58
58
Engineering
[no value]
Biggest Shovel Lifts 24 Tons
[no value]
[no value]
[no value]
[no value]
MATERIAL could be lifted to the top of a ten-story building by a giant electric shovel, the largest in the world, now being constructed by the General Electric Company. Placed in the center of a football field, it could dig out the entire field without moving from one position, and deposit the dirt from the excavation in the stands!
PopularScience_19280401_0112_004_0080.xml
article
58
58
Aviation
[no value]
Odd Parachute Square in Form
[no value]
[no value]
[no value]
[no value]
SHOULD experimentation with the new square shaped parachute pictured below be successful, all the Navy aircraft will soon be equipped with it, for it is said to embody many new safety features. In the recent tryouts at Lakehurst, N. J., life was not risked; dummies, the weight of a man, made the test drops.
PopularScience_19280401_0112_004_0081.xml
article
58
58
RADIO
[no value]
Device Aids Short Wave Radio
[no value]
[no value]
[no value]
[no value]
THAT the possibilities in short wave radio—considered unimportant a few years ago but now commanding interest by leaders in the new science—are far from exhausted is again indicated by discoveries of Abraham Esau, of Jena, Germany, that have resulted in his invention of a method to increase the power of short wave broadcasting.
PopularScience_19280401_0112_004_0082.xml
article
58
58
Aviation
[no value]
Pilotless Plane Loops Loop Under the Control of Radio
[no value]
[no value]
[no value]
[no value]
PILOTLESS planes have just been made successfully to loop the loop by wireless control from the ground, according to recent reports from England, where intensive research is being made in radio piloting. Other amazing maneuvers are made as easily possible with the delicate new governing system within the plane, operated by radio waves alone.
PopularScience_19280401_0112_004_0083.xml
article
58
58
Unusual Facts and Ideas
[no value]
Lindbergh Epic on Post Card
[no value]
[no value]
[no value]
[no value]
BY WRITING, in 10,052 words, the complete story of Col. Lindbergh’s history-making flight to France on one post card of ordinary size, Conrad Kemper, young German artist, declares he has achieved a world’s record for small and legible chirography.
PopularScience_19280401_0112_004_0084.xml
article
58
58
New Processes and Inventions
[no value]
Multiple Locomotive Sirens
[no value]
[no value]
[no value]
[no value]
SHRILL sirens, much more audible at three miles than the ordinary whistle and designed to lessen the numerous automobile accidents at crossings, were recently placed on the locomotives of two local passenger trains of the Southern Pacific lines in California.
PopularScience_19280401_0112_004_0085.xml
article
59
59
New Processes and Inventions
[no value]
Submarine Safety Device Is Donated to the Navy
[no value]
[no value]
[no value]
[no value]
A DEVICE by which a submerged submarine may signal to the surface to indicate its position and avert collisions has just been presented to the Navy Department by the Human Research Corporation, of Philadelphia. The invention of Dr. Isadore Kitsee, it has not been manufactured, but the patents are donated to the Government, which will consider it among other plans for making submarines safer, as mentioned in an article in last month’s issue of POPULAR SCIENCE MONTHLY.
PopularScience_19280401_0112_004_0086.xml
article
59
59
Unusual Facts and Ideas
[no value]
How Industry Uses Sawdust
[no value]
[no value]
[no value]
[no value]
SAWDUST, which some of us may have thought pure waste, has so many uses in industry that large concerns gather, classify and sell it by wholesale. Some 30,000 tons a year are used in meat curing—hickory mainly, but also oak, mahogany and other hardwoods.
PopularScience_19280401_0112_004_0087.xml
article
59
59
New Processes and Inventions
[no value]
Giant Rotary Plow
[no value]
[no value]
[no value]
[no value]
GREAT rotating cutters are the new features of a giant plow recently introduced in England and designed for doing much work in a hurry on large plantations. The two powerful digging wheels operate in opposite directions as the tractor moves along and, since each cutting wheel is equipped with three shares, the ground is thoroughly turned up in curving lines that cross each other again and again.
PopularScience_19280401_0112_004_0088.xml
article
59
59
Aviation
[no value]
Plane Speedier With Pontoons
[no value]
[no value]
[no value]
[no value]
ARMY engineers were amazed recently by tests on Staten Island, N. Y., and Long Island, N. Y., flying fields in which one of the Army’s four observation and attack planes, Curtiss Falcon models, flew faster with pontoons than with wheels attached to its landing gear — upsetting all past experience.
PopularScience_19280401_0112_004_0089.xml
article
59
59
Models and Toys
[no value]
Just Like MacMillan Ship
[no value]
[no value]
[no value]
[no value]
HARD rubber forms the entire hull of this new toy sailing ship, which would have a particular appeal for the boy who is stirred by a love for the sea and its romance; for it is a 30-inch model of Donald B. MacMillan’s Arctic schooner the Bowdoin. Great sport, too, is offered by the navigating possibilities of this ship, for the three sails may be raised or lowered at will and regulated with the rudder for any desired kind of sailing.
PopularScience_19280401_0112_004_0090.xml
article
59
59
Unusual Facts and Ideas
[no value]
A Needle Injects Sauce in Chicken
[no value]
[no value]
[no value]
[no value]
SAUCES injected into fresh killed chickens just before roasting gave an entirely new flavor to the meat and provided a treat for a recent dinner of the Societe Nationale d’Acclimatization of France. The method was pronounced by cooking experts far superior to the ordinary external sauce method, since in the new process the meat itself is flavored in every fiber.
PopularScience_19280401_0112_004_0091.xml
article
59
59
Unusual Facts and Ideas
[no value]
Rail Ticket Booth on Wheels
[no value]
[no value]
[no value]
[no value]
COMMUTERS who are tired of going to the station for their tickets will be interested in this German innovation by which the tickets come to the commuters. In order to facilitate the selling of weekly tramcar passes, this traveling ticket booth has been put in operation by the Leipzig tramway and has proved a great success by reason of its greater range of distribution.
PopularScience_19280401_0112_004_0092.xml
article
59
59
Unusual Facts and Ideas
[no value]
Discoveries Upset Race History
[no value]
[no value]
[no value]
[no value]
EVIDENCES of a tremendous migration of Asiatic peoples to southern Africa and Madagascar more than 2000 years ago have been discovered by Dr. Ralph Linton, assistant curator of Oceanic and Malayan ethnology at the Field Museum of Natural History, just returned from more than two years’ research in Madagascar as head of the Captain Marshall Field Expedition.
PopularScience_19280401_0112_004_0093.xml
article
59
59
Engineering
[no value]
World Water Power Census
[no value]
[no value]
[no value]
[no value]
THE United States leads the world in utilization of water power and in the capacity of its plants using this power it equals nearly the whole of Europe, according to a remarkable world census of water power just issued by the United States Geological Survey.
PopularScience_19280401_0112_004_0094.xml
article
60
60,61
New Devices for the Home
[no value]
Household Duties Simplified by New Mechanical Devices
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0095.xml
article
62
62
Models and Toys
[no value]
Children Devise New Planes
[no value]
[no value]
[no value]
[no value]
HUNDREDS of boys—and girls too— of all ages competed in the recent city-wide competition in New York for model airplanes with rubber bands as their sole motive power. Not all the planes were of conventional design. In some the children had developed their own ideas, different from any of real aeronautical engineers, showing several construction plans that may some day be adopted for full size planes.
PopularScience_19280401_0112_004_0096.xml
article
62
62
New Processes and Inventions
[no value]
Food Rises in “Magic” Table
[no value]
[no value]
[no value]
[no value]
SOON you may enter your favorite restaurant, drop an order in a slot— and have your meal delivered up through the table! The novel device, which bids fair to make our service waiterless, tip-less and trayless, was recently exhibited as seen at the right, at an exposition in New York; and according to reports it will soon be used by several restaurants.
PopularScience_19280401_0112_004_0097.xml
article
62
62
Unusual Facts and Ideas
[no value]
Better Fur Cleaning Method
[no value]
[no value]
[no value]
[no value]
A NEW process for removing spots from furs does not destroy the luster or sheen of fur or leather trimmed garments, according to an announcement from the Bureau of Standards. Working with expert cleaners, Government chemists have discovered that a little paraffin added to the naphtha preparations ordinarily used in cleaning establishments protects the garments against injury.
PopularScience_19280401_0112_004_0098.xml
article
62
62
Unusual Facts and Ideas
[no value]
Chemical Snow Replacing Ice
[no value]
[no value]
[no value]
[no value]
"CHEMICAL snow,” once only a novelty, is finding increasing use in the field of refrigeration, and is now manufactured by the ton. It lasts longer than ice, and when it is all gone, evaporated into air, not even a wet spot is left to show where the snow was.
PopularScience_19280401_0112_004_0099.xml
article
62
62
Unusual Facts and Ideas
[no value]
Aero Engineers Aid Farmer By Improving His Windmills
[no value]
[no value]
[no value]
[no value]
AERONAUTICS, after adapting the windmill to its own purposes, is returning it to the farmer greatly improved as a result of the intensive research made by the aircraft industry in the field of aerodynamics. Changes in the number of blades and the pitch of the propellers used to drive electric generators on airplanes at the Army laboratories at Dayton, Ohio, have resulted in the adaptation of a new type of wheel for ordinary windmills that increases the speed of revolution from six to ten times that of the old-fashioned wheels.
PopularScience_19280401_0112_004_0100.xml
article
62
62
Exceptional People
[no value]
Stupendous Hand Sawing Job
[no value]
[no value]
[no value]
[no value]
THE biggest job of hand sawing ever heard of in this age of power machinery is being undertaken by Captain Jacob Wilson, sailor-sawyer of Sawyer, Wis., who spent last summer demolishing a breakwater in Green Bay, Wis., in order to saw it up for firewood.
PopularScience_19280401_0112_004_0101.xml
article
62
62
Unusual Facts and Ideas
[no value]
Mining Record Smashed
[no value]
[no value]
[no value]
[no value]
MORE than eleven million dollars worth of minerals was produced in North Carolina during 1926, exceeding the previous year's production by $400,000, according to figures of State Geologist H. J. Bryson and the United States Geological Survey.
PopularScience_19280401_0112_004_0102.xml
article
62
62
Exceptional People
[no value]
He Takes Stalls to the Cows
[no value]
[no value]
[no value]
[no value]
THIS English farmer violates accepted tradition each day—he brings the stable to the cows! But A. J. Hosier, of Wexcombe, Wiltshire, England, has his reason. He has found that living entirely in the open in good weather is healthier for the cows and, moreover, results in better milk.
PopularScience_19280401_0112_004_0103.xml
article
63
63
Unusual Facts and Ideas
[no value]
Chain Drive Roller Skate Goes to “Patentees’ Court”
[no value]
[no value]
[no value]
[no value]
DURING a recent annual international exhibition of inventions in England a “court” was formed at the Institute of Patentees to deal with the gigantic task of selecting the devices most worthy of display from the mass of odd and ingenious products of inventors’ fertile minds.
PopularScience_19280401_0112_004_0104.xml
article
63
63
Unusual Facts and Ideas
[no value]
Harem Buried with Ur’s King
[no value]
[no value]
[no value]
[no value]
EXCAVATIONS in Mesopotamia made recently at the grave of a king of Ur revealed that other bodies than that of the ruler were buried in the one grave. In the fourth millennium before Christ it is apparent that the state took a woman’s life if her husband died, at least in the case of the monarchs, for in the grave, besides the king’s gaming board and dice, were the bodies of his wives.
PopularScience_19280401_0112_004_0105.xml
article
63
63
Models and Toys
[no value]
Kiddy Car Has Plane Motion
[no value]
[no value]
[no value]
[no value]
NEW among riding toys for small children is a kiddy car of unique design built to represent a monoplane, seen in the illustration below. A rocking motion which gives the young aviator a sort of aeronautical swoop as he rides down the sidewalk is one of the special features and is brought about by an off-center wheel fitted below the “fuselage” which causes the toy to move up and down when in motion.
PopularScience_19280401_0112_004_0106.xml
article
63
63
Unusual Facts and Ideas
[no value]
Red Paint Draws Barnacles
[no value]
[no value]
[no value]
[no value]
THE American merchant marine may save over $100,000,000 as a result of the researches of Dr. J. Paul Visscher of Western Reserve University, who has ascertained that it is possible to discourage barnacles from attaching themselves to the bottoms of ships by painting the undersea surfaces with a particular shade of light paint.
PopularScience_19280401_0112_004_0107.xml
article
63
63
New Processes and Inventions
[no value]
Safety Device Stops Trains
[no value]
[no value]
[no value]
[no value]
A NEW device that automatically stops trains when they pass a warning signal has been installed in Germany on the Berlin-Dresden line. The invention consists of a magnet affixed to the track at a point just past the signal tower, and an electric control mounted on the locomotive which it operates.
PopularScience_19280401_0112_004_0108.xml
article
63
63
Laboratory Discoveries
[no value]
New Poisons Kill Pests Only
[no value]
[no value]
[no value]
[no value]
GREATER deadliness to parasitic insects and kindred pests and less danger to human beings are claimed for two new spraying chemicals by Dr. Simon Marcovitch of the Tennessee Agricultural Experiment Station at Nashville. Sodium fluoride and sodium fluosilicate are the two new chemicals suggested as substitutes for the usual arsenic.
PopularScience_19280401_0112_004_0109.xml
article
63
63
New Processes and Inventions
[no value]
Motor-Driven Wire Stripper
[no value]
[no value]
[no value]
[no value]
INSULATION is cleanly and quickly removed from wire ends, making them ready for soldering or terminal connections, by merely inserting the pieces in this improved stripping machine and pressing the pedal. A productive speed ordinarily requiring eight persons is easily attained by this ingenious device, which does away with the tedious and time-wasting methods to which manufacturers formerly resorted.
PopularScience_19280401_0112_004_0110.xml
article
64
64
Unusual Facts and Ideas
[no value]
Biggest Phonograph Heard 30 Blocks
[no value]
[no value]
[no value]
[no value]
HERE is a talking machine that sends the strains of a popular melody thirty blocks with perfect ease and delivery! It is the champion in its line— the world's largest, strongest, and most distinctive phonograph. Built on the roof of the Victor Talking Machine Company factory in Camden, N. J., it stands thirty-one and a half feet high, and is twenty feet eight inches wide and sixteen feet deep.
PopularScience_19280401_0112_004_0111.xml
article
64
64
Aviation
[no value]
Stunt Flyer Takes No Chances
[no value]
[no value]
[no value]
[no value]
STUNT flying may be breath-taking but it certainly is not reckless deviltry, according to Gerhard Fieseler, German war veteran, who is the second airman to perform a forward loop. The first to perform this hazardous feat was Lieut. J. H. Doolittle, U. S. Army pilot.
PopularScience_19280401_0112_004_0112.xml
article
64
64
Aviation
[no value]
Nondrifting Mail Parachute
[no value]
[no value]
[no value]
[no value]
A MAIL parachute that does not open until it is within a few hundred yards of the ground is the invention of Arnold Waldau, Swedish flying expert. When thrown overboard it drops folded for a considerable distance without offering much resistance to the wind, then a spring makes it start to unfold.
PopularScience_19280401_0112_004_0113.xml
article
64
64
New Processes and Inventions
[no value]
Umbrella with a Window
[no value]
[no value]
[no value]
[no value]
PEDESTRIAN collisions and street crossing accidents due to the umbrella’s obstructing vision would become less frequent if this German porthole idea were followed universally. A clear view is obtained through a mica window.
PopularScience_19280401_0112_004_0114.xml
article
64
64
Automobiles
[no value]
Decline of Railways Seen
[no value]
[no value]
[no value]
[no value]
MORE concrete roads, with fewer railways, are needed, because they are cheaper to construct, cheaper to maintain, and cost nothing for service, the National Roads and Motorists Association of New South Wales, Australia, has just told the government.
PopularScience_19280401_0112_004_0115.xml
article
64
64
Health and Hygiene
[no value]
Vaccine Given in Pills Now
[no value]
[no value]
[no value]
[no value]
A NEW and painless method of vaccination is being used in Europe with great success. The vaccine is taken in pills, chocolate covered. Prof. A. Besredka, of the Pasteur Institute in Paris, has developed this means of immunization, and declares it is much more rapid in its effect than the older system.
PopularScience_19280401_0112_004_0116.xml
article
64
64
Unusual Facts and Ideas
[no value]
Smoke Dims City’s Sun
[no value]
[no value]
[no value]
[no value]
NEW YORK CITY'S great smoke screen from factories, locomotives, and steamships cuts out forty-two percent of the morning sunlight that should bring warmth on winter days, say experts of the United States Public Health Service. At noon the loss is reduced to eighteen percent.
PopularScience_19280401_0112_004_0117.xml
article
64
64
Unusual Facts and Ideas
[no value]
Two Heads Proved to Beat One
[no value]
[no value]
[no value]
[no value]
THAT “two heads are better than one” at thinking out a problem is the conclusion drawn from experiments conducted among students at Columbia University by Prof. Goodwin B. Watson, who sought to test the familiar saying. Four nine-letter words were selected, “educators,” “neurotics,” “secondary” and “universal.”
PopularScience_19280401_0112_004_0118.xml
article
64
64
Laboratory Discoveries
[no value]
X-Ray Imparts Luminescence
[no value]
[no value]
[no value]
[no value]
THE latest power of the X-ray to be discovered is its property of making certain substances glow in the dark. Dr. Frances G. Wick, of Vassar College, reveals that the substances glow if first treated with the X-ray and then warmed. One such substance is ordinary gypsum mixed with manganese.
PopularScience_19280401_0112_004_0119.xml
article
65
65
Unusual Facts and Ideas
[no value]
Electric Yacht Run by Pressing Buttons
[no value]
[no value]
[no value]
[no value]
THIS unique yacht, the Fan Kwai, is run throughout by a novel system of electrical control. Thirty-six motors, involving more than four miles of wire, enable Col. H. H. Rogers, its owner, to operate all driving, living, and recreational devices by pressing buttons or throwing switches.
PopularScience_19280401_0112_004_0120.xml
article
65
65
Automobiles
[no value]
Motor Super-Speedways to Cover Europe
[no value]
[no value]
[no value]
[no value]
SOON it will be possible for continental motorists to dash at forty miles an hour or more from the French channel ports or the Riviera across country to the Baltic without fear of arrest—unless they slacken speed! A gigantic system of auto speedways, already planned and mapped, will link France, Germany, Switzerland and Italy in a few years’ time, if present plans proposed by an international conference of automobile clubs and backed by governmental authorities are fulfilled.
PopularScience_19280401_0112_004_0121.xml
article
65
65
New Processes and Inventions
[no value]
Simple Color Film Invention
[no value]
[no value]
[no value]
[no value]
A LENS attachment for cameras that makes possible the photographing and reproducing of natural color motion pictures without special films or special developing solutions is the invention of Harold N. Cox, of Pittsburgh. A cylindrical attachment is used on the lens front of any standard camera, and a similar device on the projector reproduces the colored movies.
PopularScience_19280401_0112_004_0122.xml
article
65
65
Automobiles
[no value]
Rubber Paving Defies Wear
[no value]
[no value]
[no value]
[no value]
RUBBER paving lasts longer under heavy traffic, reduces noise and prevents skidding, concludes the report of Col. T. H. Chapman, English engineer, on an experimental rubber pavement laid in London a year and a half ago. In that time it has carried 16,000 vehicles a day without appreciable deterioration.
PopularScience_19280401_0112_004_0123.xml
article
65
65
Exceptional People
[no value]
Woman Manufactures Stone
[no value]
[no value]
[no value]
[no value]
A NEW process for making artificial stone was described recently to the Institute of Quarrying in England by Mrs. Ann Greaves, the only woman member. She declares she can produce this stone at a third the cost of real stone. It has the added advantage of being workable with hammer and chisel.
PopularScience_19280401_0112_004_0124.xml
article
66
66
LEADING ARTICLES
[no value]
How to Start Your Garden Now
Plant in Boxes at Once, Plan and Fertilize Your Beds and You'll Be Ready for Spring
[no value]
[no value]
E. BADE
ARE you planning a garden this summer? Now is the time to commence making plans and even to start the early plants indoors, if you want a splendid melon patch or aster bed to exhibit to admiring friends. Your first operations will be to prepare the inside plant boxes, for there is still frost in the ground and the prospect of a few more chilly nights.
PopularScience_19280401_0112_004_0125.xml
article
67
67
LEADING ARTICLES
[no value]
Deadly Gardens in Fly Footprints
Amazing Films Show How Decaying Matter That Spreads Disease Sprouts, Grows and Multiplies In Every Track Left by Insect Pest
[no value]
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0126.xml
article
68
68,69
RADIO
[no value]
Tips to Help Get Sharp Tuning
How to Increase Selectivity by Good Antenna and Ground— Biasing Radio-Frequency Tubes—What a Wave Trap Will Do
[no value]
[no value]
JOHN CARR
TUNING-IN the radio station you want is a lot like picking the apple that appeals to you from a dish on the table. But how are you going to pick out one particular apple if the dish happens to be filled with apple sauce? And that, in many cases, is precisely the situation that confronts you when you attempt to tune-in a particular broadcasting station from among a number of others.
PopularScience_19280401_0112_004_0127.xml
article
70
70
Fine Points to Help You in Radio
[no value]
Difficulties of Wiring Simplified
Prolonging Life of Tubes by Correct Voltage—Testing Condensers
[no value]
[no value]
[no value]
WHILE a firmly soldered joint is ideal in electric wiring, there are cases in radio where soldering is not so convenient. For example, you may wish to connect wires to an instrument that is equipped with binding posts instead of lugs. The simplest way is to wind the bared ends of the wires around the binding posts and screw down the nuts, but it is very difficult to do a good, solid job that way.
PopularScience_19280401_0112_004_0128.xml
article
70
70
Fine Points to Help You in Radio
[no value]
A B C’s of Radio
[no value]
[no value]
[no value]
[no value]
HOW long should a vacuum tube last? One thousand hours, nominally. Actually, the life of a vacuum tube depends on how it is used. Turning the rheostats too far, so that the tubes burn too brightly, may cause them to give out after only a few hours of service.
PopularScience_19280401_0112_004_0129.xml
article
70
70
Fine Points to Help You in Radio
[no value]
Use the Correct Voltage
[no value]
[no value]
[no value]
[no value]
THE importance of using the correct A, B and C voltages on a vacuum tube can hardly be emphasized too much. The A-voltage is the voltage applied to the filament of the tube. It may be direct current in the case of storage battery type tubes or alternating current in the case of the new A C tubes.
PopularScience_19280401_0112_004_0130.xml
article
70
70
Fine Points to Help You in Radio
[no value]
Testing High Capacity Condensers
[no value]
[no value]
[no value]
[no value]
A VERY common method of testing connections to see if they are tight and to test wires for broken points is to use a test circuit consisting of an ordinary drop cord with a fifteen-watt lamp in the socket. One of the two wires of the drop cord is cut.
PopularScience_19280401_0112_004_0131.xml
article
71
71,72,130
LEADING ARTICLES
[no value]
A House Has Its Face Lifted
How the Old Everett Home Lost That Pinched Look by a Sweeping Change in Its Roof Lines
[no value]
[no value]
JOHN R. McMAHON
"FINEST suburb in America, boys!” proudly announced a substantial citizen among a group assembled on the sidewalk to view a local celebration. “It would be if it wasn’t for one thing,” agreed a tall neighbor with a deep voice who was standing near by.
PopularScience_19280401_0112_004_0132.xml
advertisement
73
73
[no value]
[no value]
Advertisements
[no value]
SKF INDUSTRIES, INC.
Ball Bearings
SKF INDUSTRIES, INC.
Roller Bearings
[no value]
[no value]
PopularScience_19280401_0112_004_0133.xml
article
74
74,152,153
LEADING ARTICLES
[no value]
Unmasking Garage "Gyps"
How to Save the $20.66 You Waste Yearly on Useless Auto Repairs and Poor Workmanship
[no value]
[no value]
MYRON M. STEARNS
A SHORT time ago the following letter came to the editor of POPULAR SCIENCE MONTHLY: “Dear Sir: “What is the matter with our garage men? “Last week I took my car to a garage, and left word what I thought the trouble might be. When I went to get it they told me the trouble had evidently been what I had intimated, and that they had fixed it.
PopularScience_19280401_0112_004_0134.xml
advertisement
75
75
[no value]
[no value]
RADIO CORPORATION OF AMERICA: RCA Radiotron
[no value]
RADIO CORPORATION OF AMERICA
RCA Radiotron
[no value]
[no value]
PopularScience_19280401_0112_004_0135.xml
article
76
76
Automobiles
[no value]
Useful Kinks for the Motorist
Double Purpose Light Switch and Other New Ideas
[no value]
[no value]
[no value]
MODERN automobiles are built so close to the ground that it is no longer easy to crawl underneath them to do any necessary repair work. Of course, it is easy enough to jack up either the front or rear wheels to make it easier to work under the car, but there always is the possibility that the jack mechanism will break or that the car will roll off the jack in response to a sudden pull with a wrench or other tool applied to some part of the chassis.
PopularScience_19280401_0112_004_0136.xml
article
76
76
Automobiles
[no value]
Two-Purpose Light Switch
[no value]
[no value]
[no value]
[no value]
A NOVEL switch arrangement that can be used for two purposes is shown in Fig. 2. The switch is mounted on a small block placed just in front of the gear shift lever. In the drawing the size of the switch has been exaggerated to show the construction more clearly.
PopularScience_19280401_0112_004_0137.xml
article
76
76
Automobiles
[no value]
Jack for Extra Light
[no value]
[no value]
[no value]
[no value]
THE usual method of connecting up a trouble light is to plug it into the dash-light socket in place of the dash-light bulb, but with so many of the new cars fitted with panels that are indirectly lighted, this method is no longer practical. Of course, you can fit a metal spring clip to each of the two wires from the trouble light, but it is a nuisance to locate the proper points in the wiring each time you want to use the light.
PopularScience_19280401_0112_004_0138.xml
article
76
76
Automobiles
[no value]
When the Axle Breaks
[no value]
[no value]
[no value]
[no value]
WHEN the axle breaks on many types of cars it is impossible to tow them because the broken axle works out of the housing. If the break is close to the differential gear, the axle will support the wheel so that it will run true enough to tow the car if the device pictured in Fig. 4 is used.
PopularScience_19280401_0112_004_0139.xml
advertisement
77
77
[no value]
[no value]
FRIGIDAIRE CORPORATION
[no value]
FRIGIDAIRE CORPORATION
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0140.xml
advertisement
78
78
[no value]
[no value]
THE STANLEY WORKS: STANLEY TOOLS
[no value]
THE STANLEY WORKS
STANLEY TOOLS
[no value]
[no value]
PopularScience_19280401_0112_004_0141.xml
article
79
79,98,99
THE HOME WORKSHOP
[no value]
A Real Kiddies’ Playground
Convert Your Back Yard into a Child’s Paradise with Simply Made Equipment
[no value]
[no value]
H. V. PATTERSON
ANY boy or girl, I am sure, would like to come and play in this yard. But wouldn’t it be better still to make a playground like it? There is nothing impossible about that, for any father or brother can build these simple toys and apparatus at small cost and with little work on his part.
PopularScience_19280401_0112_004_0142.xml
article
80
80,81,119,120
HOME WORKSHOP
[no value]
Next We Make the Mayflower
Step-by-Step Instructions for Building an Exceptionally Beautiful Model of the Pilgrims’ Ship—The Work Is Relatively Easy and the Materials Cost Little
[no value]
[no value]
E. ARMITAGE McCANN
WHILE there have been and still are several vessels called “Mayflower,” we think of only one ship when the Mayflower is mentioned—that which bore the Pilgrim Fathers to Plymouth in 1620. Detailed instructions will be given in this and succeeding articles to help you build a model of this famous ship.
PopularScience_19280401_0112_004_0143.xml
article
82
82,96,121,122
RADIO
[no value]
Power Unit Built at Low Cost
For Use with the New Popular Science Electric Set—Amplifies and Supplies Current
[no value]
[no value]
ALFRED P. LANE
HERE is the low power amplifier and current supply unit to complete the electric radio receiver described in the February issue of POPULAR SCIENCE MONTHLY. We call this a low power unit because it is capable of only half the volume with good quality obtainable from the high power unit described in the March number.
PopularScience_19280401_0112_004_0144.xml
advertisement
83
83
[no value]
[no value]
CLAYTON & LAMBERT MFG. CO.: C & L Everedy 158
[no value]
CLAYTON & LAMBERT MFG. CO.
C & L Everedy 158
[no value]
[no value]
PopularScience_19280401_0112_004_0145.xml
article
84
84
HOME WORKSHOP
[no value]
His Shop Is Always Orderly
Each Tool Has Its Place in Homemade Racks That Can Be Closed and Locked
[no value]
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0146.xml
advertisement
85
85
[no value]
[no value]
EASTMAN KODAK CO.
[no value]
EASTMAN KODAK CO.
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0147.xml
article
86
86,112,114
BETTER SHOP METHODS
[no value]
Jobbing Shop Short Cuts
Keep Vertical and Horizontal Turret Lathes Set Up to Save on Short Runs
[no value]
[no value]
ALBERT A. DOWD
"HERE'S a good job for you to start off with,” said Jones, the foreman, as he handed the new workman a blueprint of the flywheel shown in Fig. 1. “You can use that 20-in. lathe by the window. Twenty-five of the flywheels are piled up alongside of the lathe, and there are twenty-five more coming from the foundry tomorrow, fifty pieces in all.
PopularScience_19280401_0112_004_0148.xml
advertisement
87
87
[no value]
[no value]
THE L. S. STARRETT CO.: Starrett Hacksaw
[no value]
THE L. S. STARRETT CO.
Starrett Hacksaw
[no value]
[no value]
PopularScience_19280401_0112_004_0149.xml
article
88
88
BETTER SHOP METHODS
[no value]
How to Mount Small Motors
[no value]
[no value]
[no value]
GEORGE A. WILLOUGHBY
WHEN motor-driven machines are installed in a home workshop, as is so often the case nowadays, the problem of mounting the motor is of considerable importance. The secret of a satisfactory motor installation — one in which the motor will run quietly—is a good, solid foundation.
PopularScience_19280401_0112_004_0150.xml
article
88
88
BETTER SHOP METHODS
[no value]
Radius-Forming Tool for Grinding Wheels
[no value]
[no value]
[no value]
H. C.
THE tool illustrated was designed to form radii on the wheel of a surface grinder. It is 6 in. long over all and 4 in. high. It can be set for any concave or convex radius up to ½ in. by thousandths. It is so made that the neutral point is at the .500 in. reading on the head, which was made from a standard micrometer.
PopularScience_19280401_0112_004_0151.xml
article
88
88
BETTER SHOP METHODS
[no value]
Measuring and Marking Bar Stock Quickly
[no value]
[no value]
[no value]
ARTHUR KENDALL
MOST shop storemen or stockroom employees have a 4-ft. rule fastened to the bench for measuring off the length of rods and other stock as required. To insure more accurate measurements, a piece of flat tool steel is bent at one end, sharpened to a chisel edge, and fastened near the end of the bench with four screws.
PopularScience_19280401_0112_004_0152.xml
article
88
88
BETTER SHOP METHODS
[no value]
Floor Compound Cleans Stains from Hands
[no value]
[no value]
[no value]
M. B. G.
IN OUR shop we have found that the best way to remove ink and grease from the hands is to rub them with the floor compound used to keep dust down when sweeping. A pan of it is kept in the sink for this purpose. We rub on a little soap first to start a lather, and then use the compound.
PopularScience_19280401_0112_004_0153.xml
article
88
88
BETTER SHOP METHODS
[no value]
Polishing Attachment for Speed Lathe
[no value]
[no value]
[no value]
EDWIN KILBURN
FINISHING irregularly shaped pieces of metal is a somewhat tiresome job if done by hand. The illustration below shows a device for finishing and polishing work that is quite easy to construct and satisfactory in operation. It is used in connection with an ordinary speed lathe.
PopularScience_19280401_0112_004_0154.xml
article
88
88
BETTER SHOP METHODS
[no value]
Window Shade Shields Lathe from Grinding Dust
[no value]
[no value]
[no value]
H. J. C.
GRINDING in the lathe, although not advisable, is sometimes necessary. The illustration shows a practical and convenient way of keeping the emery from the ways. A common window shade is cut the necessary width. After removing the small dogs that act as checks for raising and lowering the shade, the roller is fitted in a convenient holder, which is clamped to the lathe, and the shade is fastened to the tool post under the grinder.
PopularScience_19280401_0112_004_0155.xml
advertisement
89
89
[no value]
[no value]
Advertisements
[no value]
Brown &. Sharpe Mfg. Co.
CENTER GAUGE
Brown &. Sharpe Mfg. Co.
MICROMETER CALIPER
[no value]
[no value]
PopularScience_19280401_0112_004_0156.xml
advertisement
90
90
[no value]
[no value]
PECK, STOW & WILCOX CO.: PEXTO
[no value]
PECK, STOW & WILCOX CO.
PEXTO
[no value]
[no value]
PopularScience_19280401_0112_004_0157.xml
article
90
90,107,108
HOUSEHOLD KINKS
[no value]
THE SHIPSHAPE HOME
Replacing a Broken Window Pane—How to Cut Glass—Glaziers' Points and Putty
[no value]
[no value]
E. E. ERICSON
THE breaking of window glass is a frequent mishap, particularly in any home where there are small children. Fortunately, it is a comparatively easy process to replace a window pane. Any home owner who is at all handy can not only save a large part of the cost of such work but also avoid the discomfort of having to wait for the job to be done by a glazier.
PopularScience_19280401_0112_004_0158.xml
advertisement
91
91
[no value]
[no value]
BEMIS & CALL COMPANY: SUPER VALUE WRENCHES
[no value]
BEMIS & CALL COMPANY
SUPER VALUE WRENCHES
[no value]
[no value]
PopularScience_19280401_0112_004_0159.xml
advertisement
92
92
[no value]
[no value]
THE CELOTEX COMPANY
[no value]
THE CELOTEX COMPANY
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0160.xml
article
92
92
HOME WORKSHOP
[no value]
Making Your Jackknife Last
Initialing to Prevent Loss—Simple Ways to Restore Broken Blades—Upkeep Hints
[no value]
[no value]
CHELSEA FRASER
HOW long does a jackknife last? Statistics show the average knife carried by man abides with him only ten months. It is my purpose to suggest easy remedies for the general run of knife troubles. By adopting them you can make your own jackknife stand by you longer than the average.
PopularScience_19280401_0112_004_0161.xml
advertisement
93
93
[no value]
[no value]
ETHYL GASOLINE CORPORATION: ETHYL GASOLINE
[no value]
ETHYL GASOLINE CORPORATION
ETHYL GASOLINE
[no value]
[no value]
PopularScience_19280401_0112_004_0162.xml
advertisement
94
94
[no value]
[no value]
THE CARBORUNDUM COMPANY: Carborundum Combination Stone
[no value]
THE CARBORUNDUM COMPANY
Carborundum Combination Stone
[no value]
[no value]
PopularScience_19280401_0112_004_0163.xml
article
94
94,105,106
HOME WORKSHOP
[no value]
Repairing Canvas Canoes
Broken Ribs—Cracked Planks—Loose Bolts— Covering and Patching
[no value]
[no value]
J. V. HAZZARD
EVERY now and then one runs across a canoe built years ago for serious backwoods service rather than pleasure. Rounder in cross section, sharper of stem and narrower of beam than present-day craft, these old canoes travel faster and easier. They are true thoroughbreds of canoedom, the nearest approach in form and construction to the Indian's birch bark, and the enthusiast views them with a thrill.
PopularScience_19280401_0112_004_0164.xml
advertisement
95
95
[no value]
[no value]
THE STUDEBAKER CORPORATION OF AMERICA
[no value]
THE STUDEBAKER CORPORATION OF AMERICA
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0165.xml
advertisement
96
96
[no value]
[no value]
ALUMINUM COMPANY OF AMERICA: Aluminum Box Shield
[no value]
ALUMINUM COMPANY OF AMERICA
Aluminum Box Shield
[no value]
[no value]
PopularScience_19280401_0112_004_0166.xml
advertisement
96a
96a
[no value]
[no value]
LIGGETT & MYERS TOBACCO CO.: GRANGER ROUGH CUT
[no value]
LIGGETT & MYERS TOBACCO CO.
GRANGER ROUGH CUT
[no value]
[no value]
PopularScience_19280401_0112_004_0167.xml
advertisement
96b
96b
[no value]
[no value]
MILLERS FALLS COMPANY: Electric Drill
[no value]
MILLERS FALLS COMPANY
Electric Drill
[no value]
[no value]
PopularScience_19280401_0112_004_0168.xml
article
97
97,117,118
HOME WORKSHOP
[no value]
Restoring Old Furniture
How to Preserve the Original Wood—Worn Drawers—Clamps—Blind Nailing
[no value]
[no value]
R. C. STANLEY
BEFORE taking up the repair of old furniture, it might be well to explain what constitutes an original antique. It is, in a general way, anything at least 100 years old and ninety percent original. Our Government recognizes as antique, and allows to enter the country free of duty, anything shipped from abroad that can be proved, to the satisfaction of the customs officials, to be more than 100 years old.
PopularScience_19280401_0112_004_0169.xml
advertisement
97
97
[no value]
[no value]
Champion Spark Plugs: Champion X
[no value]
Champion Spark Plugs
Champion X
[no value]
[no value]
PopularScience_19280401_0112_004_0170.xml
advertisement
98
98
[no value]
[no value]
Hammacher, Schlemmer & Co.
[no value]
Hammacher, Schlemmer & Co.
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0171.xml
article
99
99
HOME WORKSHOP
[no value]
Screw Eyes Serve as Neat Supports for Shelves
[no value]
[no value]
[no value]
[no value]
WHEN it is not convenient to use regular shelf supports, screw eyes often will serve in their place. Small shelves can be rested on the screw eyes just as on regular shelf supports, but large shelves can be held by driving short screws up through the screw eyes into the wood as shown.
PopularScience_19280401_0112_004_0172.xml
advertisement
99
99
[no value]
[no value]
NORTHBROS. MFG. CO.: “Yankee” Bit Extension No. 2150
[no value]
NORTHBROS. MFG. CO.
“Yankee” Bit Extension No. 2150
[no value]
[no value]
PopularScience_19280401_0112_004_0173.xml
advertisement
100
100
[no value]
[no value]
Western Electric
[no value]
Western Electric
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0174.xml
article
100
100,101,103,104
HOME WORKSHOP
[no value]
Furniture for Beginners to Make
[no value]
[no value]
[no value]
VERNON W. PALEN
ANYONE who can saw wood and drive nails with fair accuracy will find it a simple matter to construct the four useful little pieces of furniture illustrated on this and the following pages—a magazine holder, a night or bedside table, a smoking stand and a corner shelf or rack.
PopularScience_19280401_0112_004_0175.xml
advertisement
101
101
[no value]
[no value]
THE PALMOLIVE-PEET COMPANY: Palmolive Shaving Cream
[no value]
THE PALMOLIVE-PEET COMPANY
Palmolive Shaving Cream
[no value]
[no value]
PopularScience_19280401_0112_004_0176.xml
advertisement
102
102
[no value]
[no value]
NICHOLSON FILE CO.
[no value]
NICHOLSON FILE CO.
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0177.xml
article
102
102
HOME WORKSHOP
[no value]
Blueprints for Your Home Workshop
[no value]
[no value]
[no value]
[no value]
ANY ONE of the blueprints listed below can be obtained for 25 cents. The blueprints are complete in themselves, but if you wish the corresponding back issue of the magazine in which the project was described in detail, it can be had for 25 cents additional so long as copies are available.
PopularScience_19280401_0112_004_0178.xml
advertisement
103
103
[no value]
[no value]
BOSTON VARNISH COMPANY: KYANIZE Floor Finish
[no value]
BOSTON VARNISH COMPANY
KYANIZE Floor Finish
[no value]
[no value]
PopularScience_19280401_0112_004_0179.xml
advertisement
104
104
[no value]
[no value]
INGERSOLL WATCH CO., Inc.: INGERSOLL ALARM CLOCK
[no value]
INGERSOLL WATCH CO., Inc.
INGERSOLL ALARM CLOCK
[no value]
[no value]
PopularScience_19280401_0112_004_0180.xml
advertisement
104
104
[no value]
[no value]
Advertisements
[no value]
THOMPSON BROS. BOAT MFG. CO.
Canoes
THOMPSON BROS. BOAT MFG. CO.
RowboatS
[no value]
[no value]
PopularScience_19280401_0112_004_0181.xml
advertisement
104
104
[no value]
[no value]
GILSON SLIDE RULE CO.: The Midget “Five-in-One’’ Slide Rule
[no value]
GILSON SLIDE RULE CO.
The Midget “Five-in-One’’ Slide Rule
[no value]
[no value]
PopularScience_19280401_0112_004_0182.xml
advertisement
104
104
[no value]
[no value]
H. GERSTNER & SONS: TOOL CHESTS
[no value]
H. GERSTNER & SONS
TOOL CHESTS
[no value]
[no value]
PopularScience_19280401_0112_004_0183.xml
advertisement
105
105
[no value]
[no value]
Advertisements
[no value]
Colgate & Co.
COLGATE LATHER
Colgate & Co.
Colgate Talc for Men
[no value]
[no value]
PopularScience_19280401_0112_004_0184.xml
advertisement
106
106
[no value]
[no value]
TRIMONT MFG. CO., Inc.: TRIMO
[no value]
TRIMONT MFG. CO., Inc.
TRIMO
[no value]
[no value]
PopularScience_19280401_0112_004_0185.xml
article
106
106
HOME WORKSHOP
[no value]
Template for Block Letter Signs
[no value]
[no value]
[no value]
[no value]
EVEN if you have had no experience in sign painting, you can make presentable block letter signs or cut neat stencils with the aid of a sheet metal or cardboard template made as illustrated. The letters are made five squares high; the extra square on the template is to give a place to hold it down while drawing around it and also to provide a long edge for ruling the diagonals of “N” and similar letters.
PopularScience_19280401_0112_004_0186.xml
advertisement
106
106
[no value]
[no value]
The Veeder Mfg. Co.: Veeder COUNTERS
[no value]
The Veeder Mfg. Co.
Veeder COUNTERS
[no value]
[no value]
PopularScience_19280401_0112_004_0187.xml
advertisement
107
107
[no value]
[no value]
GOODELL-PRATT COMPANY: No. 1075 Scroll Saw
[no value]
GOODELL-PRATT COMPANY
No. 1075 Scroll Saw
[no value]
[no value]
PopularScience_19280401_0112_004_0188.xml
advertisement
108
108
[no value]
[no value]
Foley Saw Tool Co., Inc.: FOLEY Automatic SAW FILER
[no value]
Foley Saw Tool Co., Inc.
FOLEY Automatic SAW FILER
[no value]
[no value]
PopularScience_19280401_0112_004_0189.xml
article
108
108,109,110
HOUSEHOLD KINKS
[no value]
How to Fill Holes in Plaster Walls
[no value]
[no value]
[no value]
F. N. Vanderwalker
HOLES in plaster walls from one to six inches in diameter as well as all wide cracks can easily be patched by any handy man. Cut out all loose pieces right down to the lath and undercut the edges all around. When the patch is to be large, it is easier to make the material remain in place if galvanized nails are driven into the wood studs or laths.
PopularScience_19280401_0112_004_0190.xml
advertisement
108
108
[no value]
[no value]
BURGESS BATTERY COMPANY: BURGESS FLASHLIGHT & RADIO BATTERIES
[no value]
BURGESS BATTERY COMPANY
BURGESS FLASHLIGHT & RADIO BATTERIES
[no value]
[no value]
PopularScience_19280401_0112_004_0191.xml
advertisement
109
109
[no value]
[no value]
HARLEY'DAVIDSON MOTOR CO.: HARLEY-DAVIDSON Motorcycles
[no value]
HARLEY'DAVIDSON MOTOR CO.
HARLEY-DAVIDSON Motorcycles
[no value]
[no value]
PopularScience_19280401_0112_004_0192.xml
advertisement
110
110
[no value]
[no value]
THE SANDUSKY CEMENT COMPANY: MEDUSA CEMENT PAINT
[no value]
THE SANDUSKY CEMENT COMPANY
MEDUSA CEMENT PAINT
[no value]
[no value]
PopularScience_19280401_0112_004_0193.xml
article
110
110
HOME WORKSHOP
[no value]
Hot Bed Sash
[no value]
[no value]
[no value]
HARRY P. BOTSFORD
WANTING several hot beds without the expense of buying stock sash for them, I made the necessary sash myself at little cost. The glass I cut from broken window panes, the pieces being 6½ in. wide and from 1 to 3 ft. long. I made the sash bars by nailing three common laths together side by side, keeping the upper edge of the center lath ½ in. higher than the two outer ones.
PopularScience_19280401_0112_004_0194.xml
article
110
110
HOUSEHOLD KINKS
[no value]
Cleaning Shades
[no value]
[no value]
[no value]
L.T.S.
WALL paper cleaners can be used for freshening up slightly soiled window shades. It is possible to clean linen shades of good quality by stretching them tightly on a curtain stretcher frame or tacking them on the floor and scrubbing them with warm soapsuds.
PopularScience_19280401_0112_004_0195.xml
article
110
110
HOUSEHOLD KINKS
[no value]
Scrubbing Fireplaces
[no value]
[no value]
[no value]
[no value]
FIREPLACE bricks can be cleaned of soot and dirt, even if in very bad condition, by brushing them vigorously with a broom and applying a mixture of 1 pt. strong household ammonia and 2 lbs. of powdered pumice stone in a gallon of soft soap. Apply this with a brush and let it stand for an hour before scrubbing it into the surface.
PopularScience_19280401_0112_004_0196.xml
advertisement
110
110
[no value]
[no value]
Larus & Bro. Co.: Edgeworth
[no value]
Larus & Bro. Co.
Edgeworth
[no value]
[no value]
PopularScience_19280401_0112_004_0197.xml
article
111
111
HOME WORKSHOP
[no value]
Home Workshop Chemistry
Simple Formulas that Will Save Time and Money
Hydrochloric Acid (Muriatic Acid) HCl
[no value]
[no value]
[no value]
HYDROCHLORIC acid—or muriatic acid, as it is also called—is one of the primary chemicals used both in industry and the trades. Hydrochloric acid is a gas and is easily absorbed by water. The ordinary concentrated acid is yellow in color; when chemically pure it is water white.
PopularScience_19280401_0112_004_0198.xml
advertisement
111
111
[no value]
[no value]
SOUTH BEND LATHE WORKS: South Bend LATHES
[no value]
SOUTH BEND LATHE WORKS
South Bend LATHES
[no value]
[no value]
PopularScience_19280401_0112_004_0199.xml
advertisement
111
111
[no value]
[no value]
ST.PAUL WELDING & MFG. CO.: TORIT TORCH No. 23
[no value]
ST.PAUL WELDING & MFG. CO.
TORIT TORCH No. 23
[no value]
[no value]
PopularScience_19280401_0112_004_0200.xml
advertisement
111
111
[no value]
[no value]
American Chime Clock Co.
[no value]
American Chime Clock Co.
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0201.xml
advertisement
112
112
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0202.xml
advertisement
113
113
[no value]
[no value]
Advertisements
[no value]
E. C. ATKINS & COMPANY
Atkins No. 53 Hand Saw
E. C. ATKINS & COMPANY
Atkins No. 53 Rip Saw
[no value]
[no value]
PopularScience_19280401_0112_004_0203.xml
advertisement
114
114
[no value]
[no value]
Smooth-On Mfg. Co.
[no value]
Smooth-On Mfg. Co.
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0204.xml
article
114
114
BETTER SHOP METHODS
[no value]
Thread Cleaning Tool
[no value]
[no value]
[no value]
H. MOORE
WELL fitting screws will bind unless the threads are perfectly clean. When a screw thread is blocked up with small particles or hard grease, I use a scraper of my own manufacture. It consists of two arms cut from No. 10 gage sheet metal and riveted together with a caliper joint, as shown.
PopularScience_19280401_0112_004_0205.xml
advertisement
114
114
[no value]
[no value]
WESTERN CLOCK COMPANY: Pocket Ben
[no value]
WESTERN CLOCK COMPANY
Pocket Ben
[no value]
[no value]
PopularScience_19280401_0112_004_0206.xml
article
115
115
BETTER SHOP METHODS
[no value]
Steps to Take in Making a Toolmaker’s Jack
[no value]
[no value]
[no value]
H. B. KELLAM
MAKING a toolmaker’s jack is a useful and instructive project for the school shop. It involves the use of a number of tools and requires considerable care in machining; it also offers an opportunity for workmanlike finishing. The jack is made of soft steel.
PopularScience_19280401_0112_004_0207.xml
article
115
115
BETTER SHOP METHODS
[no value]
Cork Pads for Clamps
[no value]
[no value]
[no value]
[no value]
EXCELLENT pads to keep small clamps from slipping or marring the surface of polished metal can be obtained by gouging out the thin cork pieces in the caps of soda water bottles.—F. B.
PopularScience_19280401_0112_004_0208.xml
advertisement
115
115
[no value]
[no value]
SIMONDS SAW AND STEEL COMPANY: Files
[no value]
SIMONDS SAW AND STEEL COMPANY
Files
[no value]
[no value]
PopularScience_19280401_0112_004_0209.xml
advertisement
115
115
[no value]
[no value]
UP-TO-DATE MACHINE WORKS
[no value]
UP-TO-DATE MACHINE WORKS
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0210.xml
advertisement
116
116
[no value]
[no value]
The David Maydole Hammer Co.: Maydole Hammers
[no value]
The David Maydole Hammer Co.
Maydole Hammers
[no value]
[no value]
PopularScience_19280401_0112_004_0211.xml
article
116
116
HOME WORKSHOP
[no value]
How to Fit Hinges Like an Expert
[no value]
[no value]
[no value]
C. A. K.
FEW problems give a more accurate measurement of a home worker's skill than the fitting of a pair of hinges. In doing this the only mark or cut that is “good enough” is that which is as near absolute accuracy as the worker can make it. The exact length of the hinge AA should be marked from the hinge itself with a knife point.
PopularScience_19280401_0112_004_0212.xml
advertisement
116
116
[no value]
[no value]
RUTLAND FIRE CLAY CO.: Rutland No-Tar-In ROOF COATING
[no value]
RUTLAND FIRE CLAY CO.
Rutland No-Tar-In ROOF COATING
[no value]
[no value]
PopularScience_19280401_0112_004_0213.xml
advertisement
116
116
[no value]
[no value]
The Parks Woodworking Machine Co.: Cabinet Shop Special No. 10
[no value]
The Parks Woodworking Machine Co.
Cabinet Shop Special No. 10
[no value]
[no value]
PopularScience_19280401_0112_004_0214.xml
advertisement
117
117
[no value]
[no value]
C. G. CONN, Ltd.
[no value]
C. G. CONN, Ltd.
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0215.xml
advertisement
117
117
[no value]
[no value]
OLD TOWN CANOE Co.
[no value]
OLD TOWN CANOE Co.
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0216.xml
advertisement
117
117
[no value]
[no value]
The DeVry Corporation
[no value]
The DeVry Corporation
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0217.xml
advertisement
118
118
[no value]
[no value]
ADDISON-LESLIE COMPANY: PLASTIC WOOD
[no value]
ADDISON-LESLIE COMPANY
PLASTIC WOOD
[no value]
[no value]
PopularScience_19280401_0112_004_0218.xml
advertisement
118
118
[no value]
[no value]
Remington Arms Company, Inc.: Remington Knife
[no value]
Remington Arms Company, Inc.
Remington Knife
[no value]
[no value]
PopularScience_19280401_0112_004_0219.xml
advertisement
118
118
[no value]
[no value]
SHAW MFG. CO.
[no value]
SHAW MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0220.xml
advertisement
118
118
[no value]
[no value]
Model Aircraft Co.
[no value]
Model Aircraft Co.
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0221.xml
advertisement
119
119
[no value]
[no value]
Jung Arch Brace Co.
[no value]
Jung Arch Brace Co.
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0222.xml
advertisement
119
119
[no value]
[no value]
DUDLEY LOCK CORPORATION
[no value]
DUDLEY LOCK CORPORATION
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0223.xml
advertisement
119
119
[no value]
[no value]
SEA ARTS GUILD
[no value]
SEA ARTS GUILD
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0224.xml
advertisement
119
119
[no value]
[no value]
Advertisements
[no value]
Boucher Inc
SHIP BINNACLES
Boucher Inc
CABIN DOORS AND WINDOWS
[no value]
[no value]
PopularScience_19280401_0112_004_0225.xml
advertisement
120
120
[no value]
[no value]
CLEMSON BROTHERS,INC.: STAR HACK SAW BLADES
[no value]
CLEMSON BROTHERS,INC.
STAR HACK SAW BLADES
[no value]
[no value]
PopularScience_19280401_0112_004_0226.xml
article
120
120
HOME WORKSHOP
[no value]
How to Make Small Pulleys
[no value]
[no value]
[no value]
ERIC B. ROBERTS
IN THE workshop a pulley for light work or for a temporary model is sometimes needed. It can be made from tin lids taken from syrup cans, or smaller lids of the same style. Two lids placed together form one grooved pulley. A washer is placed on each side and holes are drilled through so that the parts can be fastened with stove bolts.
PopularScience_19280401_0112_004_0227.xml
advertisement
120
120
[no value]
[no value]
Bennett Homes
[no value]
Bennett Homes
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0228.xml
advertisement
120
120
[no value]
[no value]
MODEL SHIP SUPPLY CO.: MAYFLOWER
[no value]
MODEL SHIP SUPPLY CO.
MAYFLOWER
[no value]
[no value]
PopularScience_19280401_0112_004_0229.xml
advertisement
120
120
[no value]
[no value]
Plymouth Rock Squab Company
[no value]
Plymouth Rock Squab Company
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0230.xml
advertisement
121
121
[no value]
[no value]
Advertisements
[no value]
HAMMARLUND MFG. CO.
The Famous Midline Condenser
HAMMARLUND MFG. CO.
Radio-Frequency Choke Coil
[no value]
[no value]
PopularScience_19280401_0112_004_0231.xml
advertisement
121
121
[no value]
[no value]
Radio Specialty Co.
[no value]
Radio Specialty Co.
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0232.xml
advertisement
121
121
[no value]
[no value]
RADIALL CO.
[no value]
RADIALL CO.
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0233.xml
advertisement
121
121
[no value]
[no value]
United Electric Motor Co.
[no value]
United Electric Motor Co.
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0234.xml
advertisement
122
122
[no value]
[no value]
Advertisements
[no value]
AMERICAN TRANSFORMER CO.
AmerTran Power Transformer, Type PF 281
AMERICAN TRANSFORMER CO.
AmerChoke, Type 709
[no value]
[no value]
PopularScience_19280401_0112_004_0235.xml
article
122
122
HOME WORKSHOP
[no value]
Simple Holder Aids in Gluing Ship Model Ladders
[no value]
[no value]
[no value]
CLINTON F. GLUCK
IN SHIP model work, finding that the little ladders were difficult to make, I devised a holder to aid in assembling the parts. It is made of maple by 2 by 4 in. One end is cut off at an angle of about 35 degrees, and with a fine back saw slots are cut ⅜ in. deep and about 3/16 in. apart on this edge.
PopularScience_19280401_0112_004_0236.xml
advertisement
122
122
[no value]
[no value]
ELECTRAD, Inc.: TRUVOLT ALL-WIRE RESISTANCES
[no value]
ELECTRAD, Inc.
TRUVOLT ALL-WIRE RESISTANCES
[no value]
[no value]
PopularScience_19280401_0112_004_0237.xml
advertisement
122
122
[no value]
[no value]
Advertisements
[no value]
THE GEORGE W. WALKER Co.
Victoreen R. F. Transformers
THE GEORGE W. WALKER Co.
Victoreen “112” Audio Unit
[no value]
[no value]
PopularScience_19280401_0112_004_0238.xml
article
123
123
[no value]
[no value]
Tool-Post Grinder for Your Lathe
[no value]
[no value]
[no value]
J. Carroll Tobias
EVERY mechanic who owns an engine lathe and attempts anything but the most elementary work appreciates the need for a tool-post grinder. Such a grinder is often a necessity when making odd-sized reamers, forming tools, milling cutters and other special tools, as well as mandrels, drill-chuck arbors and the like.
PopularScience_19280401_0112_004_0239.xml
advertisement
123
123
[no value]
[no value]
STUDEBAKER WATCH COMPANY
[no value]
STUDEBAKER WATCH COMPANY
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0240.xml
advertisement
123
123
[no value]
[no value]
J. D. Wallace Co.: Portable electric planer
[no value]
J. D. Wallace Co.
Portable electric planer
[no value]
[no value]
PopularScience_19280401_0112_004_0241.xml
advertisement
124
124
[no value]
[no value]
Creo-Dipt Co., Inc.: CREO-DIPT Stained Shingles
[no value]
Creo-Dipt Co., Inc.
CREO-DIPT Stained Shingles
[no value]
[no value]
PopularScience_19280401_0112_004_0242.xml
advertisement
124
124
[no value]
[no value]
Rutland Fire Clay Co.: Rutland Patching Plaster
[no value]
Rutland Fire Clay Co.
Rutland Patching Plaster
[no value]
[no value]
PopularScience_19280401_0112_004_0243.xml
advertisement
124
124
[no value]
[no value]
The Lacquer-Well Spray Co.: Lacquer-Well SPRAYER
[no value]
The Lacquer-Well Spray Co.
Lacquer-Well SPRAYER
[no value]
[no value]
PopularScience_19280401_0112_004_0244.xml
advertisement
124
124
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0245.xml
advertisement
125
125
[no value]
[no value]
Advertisements
[no value]
WACO TOOL WORKS, Inc.
Tilt Top Table
WACO TOOL WORKS, Inc.
RED JACKET MASTER DRILL
[no value]
[no value]
PopularScience_19280401_0112_004_0246.xml
advertisement
125
125
[no value]
[no value]
Carter Radio Co.
[no value]
Carter Radio Co.
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0247.xml
advertisement
125
125
[no value]
[no value]
IDEAL AEROPLANE & SUPPLY CO.,Inc.: LINDBERGH'S "Spirit of St. Louis”
[no value]
IDEAL AEROPLANE & SUPPLY CO.,Inc.
LINDBERGH'S "Spirit of St. Louis”
[no value]
[no value]
PopularScience_19280401_0112_004_0248.xml
advertisement
126
126
[no value]
[no value]
COPELAND: Electric Refrigerator
[no value]
COPELAND
Electric Refrigerator
[no value]
[no value]
PopularScience_19280401_0112_004_0249.xml
advertisement
126
126
[no value]
[no value]
Dubilier Condenser Corp.: Dubilier CONDENSERS
[no value]
Dubilier Condenser Corp.
Dubilier CONDENSERS
[no value]
[no value]
PopularScience_19280401_0112_004_0250.xml
advertisement
127
127
[no value]
[no value]
JOHNSON MOTOR COMPANY: Standard Twin
[no value]
JOHNSON MOTOR COMPANY
Standard Twin
[no value]
[no value]
PopularScience_19280401_0112_004_0251.xml
advertisement
127
127
[no value]
[no value]
CHEMICAL TOILET CORP.: San-Equip SEPTIC TANKS
[no value]
CHEMICAL TOILET CORP.
San-Equip SEPTIC TANKS
[no value]
[no value]
PopularScience_19280401_0112_004_0252.xml
advertisement
127
127
[no value]
[no value]
BUESCHER BAND INSTRUMENT CO.
[no value]
BUESCHER BAND INSTRUMENT CO.
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0253.xml
advertisement
128
128
[no value]
[no value]
MULLINS MANUFACTURING CORPORATION
[no value]
MULLINS MANUFACTURING CORPORATION
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0254.xml
advertisement
128
128
[no value]
[no value]
Advertisement: Eveready Batteries
[no value]
[no value]
Eveready Batteries
[no value]
[no value]
PopularScience_19280401_0112_004_0255.xml
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128
128
[no value]
[no value]
Wollensak Optical Company: 250 POWER MICROSCOPE
[no value]
Wollensak Optical Company
250 POWER MICROSCOPE
[no value]
[no value]
PopularScience_19280401_0112_004_0256.xml
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128
128
[no value]
[no value]
The EDWARDS MFG. CO.: EDWARDS METAL ROOFS
[no value]
The EDWARDS MFG. CO.
EDWARDS METAL ROOFS
[no value]
[no value]
PopularScience_19280401_0112_004_0257.xml
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129
129
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0258.xml
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130
130
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0259.xml
article
130
130
Laboratory Discoveries
[no value]
Chicken Heart Still Alive
[no value]
[no value]
[no value]
[no value]
A BIRTHDAY party was recently held at the Rockefeller Institute in New York City to celebrate the sixteenth anniversary of the famous bit of chicken heart tissue which has been kept alive since early in 1912. Each day the heart is bathed in a special preparation known as “Ringer's solution” for forty-five seconds.
PopularScience_19280401_0112_004_0260.xml
article
131
131
[no value]
[no value]
How Fast Does Blood Flow?
[no value]
[no value]
[no value]
[no value]
THE average time taken by the blood to circulate from one arm to the other is eighteen seconds. It makes the round trip three and a third times a minute.
PopularScience_19280401_0112_004_0261.xml
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131
131
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0262.xml
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132
132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158
[no value]
[no value]
MONEY-MAKING DEPARTMENT
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0263.xml
article
157
157
Automobiles
[no value]
Safety Beacons in Streets
[no value]
[no value]
[no value]
[no value]
SAFETY traffic posts with built-in floodlights protect pedestrians from traffic near trolley loading platforms at 130 different places in Baltimore, Md. The lights on three sides are ordinary amber, flashing caution signals. On the fourth side, toward the safety zone, a shaded white floodlight reveals pedestrians standing on the platform where the trolley cars stop.
PopularScience_19280401_0112_004_0264.xml
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159
159
[no value]
[no value]
NATIONAL CARBON CO., INC.: Eveready Columbia Hot Shot
[no value]
NATIONAL CARBON CO., INC.
Eveready Columbia Hot Shot
[no value]
[no value]
PopularScience_19280401_0112_004_0265.xml
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160
160
[no value]
[no value]
R. R. DONNELLEY & SONS CO.: LISTERINE
[no value]
R. R. DONNELLEY & SONS CO.
LISTERINE
[no value]
[no value]
PopularScience_19280401_0112_004_0266.xml
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161
161
[no value]
[no value]
The General Electric Company
[no value]
The General Electric Company
[no value]
[no value]
[no value]
PopularScience_19280401_0112_004_0267.xml
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162
162,163,164
[no value]
[no value]
Advertisement: LUCKY STRIKE
[no value]
[no value]
LUCKY STRIKE
[no value]
[no value]
PopularScience_19280401_0112_004_0268.xml