Issue: 19270501

Sunday, May 1, 1927
May 1927
5
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110
Sunday, December 28, 2014

Articles
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Popular Science
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PopularScience_19270501_0110_005_0001.xml
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FAYETTE R. PLUMB, Inc.
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FAYETTE R. PLUMB, Inc.
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PopularScience_19270501_0110_005_0002.xml
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CADILLAC MOTOR CAR COMPANY
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CADILLAC MOTOR CAR COMPANY
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PopularScience_19270501_0110_005_0003.xml
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HE MOVED THE WORLD
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A WEE boy, scarcely old enough to have accurate control of his hands, dumped a heavy load of sand from his toy truck. I marveled at the mechanism that enabled him to lift the weight. And yet, the ratchet that tilted the load was but an application of one of the oldest principles of mechanics—that of the lever.
PopularScience_19270501_0110_005_0004.xml
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ETHYL GASOLINE CORPORATION
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ETHYL GASOLINE CORPORATION
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PopularScience_19270501_0110_005_0005.xml
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4
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REMINGTON TYPEWRITER COMPANY
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REMINGTON TYPEWRITER COMPANY
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PopularScience_19270501_0110_005_0006.xml
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4
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Advertisement: POPULAR SCIENCE
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POPULAR SCIENCE
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PopularScience_19270501_0110_005_0007.xml
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Advertisement: POPULAR SCIENCE
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POPULAR SCIENCE
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PopularScience_19270501_0110_005_0008.xml
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5
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RCA Radiotron
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RCA Radiotron
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PopularScience_19270501_0110_005_0009.xml
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6
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The SERVANT PROBLEM Solved and a Good Investment Made
A Service for Readers
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WALLACE AMES
MRS. TULLY seemed unusually well pleased with something as the family sat down to dinner one evening recently. “What’s up?" queried her husband, all filled with unmasculine-like curiosity. “I’ve solved the servant problem," announced Mrs. Tully.
PopularScience_19270501_0110_005_0010.xml
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7
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Booklets That Will Help You Get Ahead
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ANYONE with money available for investments will find the booklets listed below of help in getting ahead financially. You may obtain any of these booklets by writing direct to the issuing house. It will be appreciated if you mention POPULAR SCIENCE MONTHLY when writing for booklets.
PopularScience_19270501_0110_005_0011.xml
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Advertisement
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PopularScience_19270501_0110_005_0012.xml
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The Barbasol Company
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The Barbasol Company
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PopularScience_19270501_0110_005_0013.xml
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7
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THE F.H. SMITH CO.
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THE F.H. SMITH CO.
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PopularScience_19270501_0110_005_0014.xml
article
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8
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Why You Need Good B-Batteries
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ALEXANDER SENAUKE
FEW owners of radio sets attach sufficient importance to the source of vacuum tube plate supply that they use and the rôle that this plays in the radio outfit. If they appreciated how much the proper operation of the receiver, its quality of reproduction and economy of operation depended on this very important radio accessory, they would take considerably more care in its selection.
PopularScience_19270501_0110_005_0015.xml
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Taylor Instrument Companies
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Taylor Instrument Companies
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PopularScience_19270501_0110_005_0016.xml
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10
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The CREBE Synchrophase RADIO
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The CREBE Synchrophase RADIO
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PopularScience_19270501_0110_005_0017.xml
masthead
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11
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Popular Science MONTHLY
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PopularScience_19270501_0110_005_0018.xml
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11,12,13
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New Wealth from Farm Waste
Shoes from Cornstalks, Paint from Straw and Other By-Products May Save Us Millions
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WHEELER McMILLEN
YOU who pay grocery bills and the farmer who grows the groceries may peer hopefully these days into scientific laboratories. There effective methods of accomplishing that seemingly impossible feat—cutting the costs of food while simultaneously increasing the prices of farm products— are being found.
PopularScience_19270501_0110_005_0019.xml
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14,15,16,17,123,124,125,126,127
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Fire Shy
A flaming story of the men who tame rivers of steel— How one of them seared the craven fear from his soul
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EDMUND M. LITTELL
CHUCK SELLERS might look like a real steel man; the letter that introduced him might in so many words say that he could do a thing very few men had ever done, but—Pat Donnell, the black-eyed giant who ruled the open hearth furnaces of Argo Steel, looked from the man to the letter with an eye that saw behind the words.
PopularScience_19270501_0110_005_0020.xml
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The M ost Spectacular Sport in the World
How Automobile Racing Makes Cars Faster, Safer and More Comfortable—Episodes of Famous Races
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PETER VISCHER
THEIR engines roaring, their cars never more than a few feet apart, the two lurched around that treacherous dirt track—Barney Oldfield in his famous Blitzen Benz and his bitter rival, Ralph De Palma, in a monster Fiat— cars capable of bettering two miles a minute.
PopularScience_19270501_0110_005_0021.xml
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20,148
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Smoke Costs You $16 a Year
How Our Cities Are Seeking to Purify the Air Breathe by Washing Away Tons of Poisonous Soot
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GEORGE LEE DOWD
MODERN cities have made enormous progress in cleaning out their dirty corners and purifying their food and drink; yet, until very recently, they have given hardly a thought to supplying their people with clean air to breathe. To emphasize this point, a noted scientist attending a luncheon in his honor in a great middle western city recently took samples of the air in the room.
PopularScience_19270501_0110_005_0022.xml
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21,22,142
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If I Fall into the Sea—
The Airman Who Flew to the Pole Tells How He Plans to Hop from New York to Paris
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COMMANDER RICHARD E. BYRD
THE minute the World War ended I began laying my plans to hop the Atlantic. In May, 1919, Commander Reed, U.S.N., did the trick via the Azores, covering 2,150 miles in 26 hours 45 minutes, not counting his stopover at Ponta Delgada.
PopularScience_19270501_0110_005_0023.xml
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How Locomotives Pulled Stricken Submarine Ashore
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OUT on the water at the Ports-mouth, N. H., Navy Yard, floated the submarine S-48—wrecked on the rocks of Jeffrey Point in January, 1925. On shore, some 500 yards away, stood three puffing bulldog locomotives, hitched in tandem. Between stretched a mile and a quarter of steel cable.
PopularScience_19270501_0110_005_0024.xml
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24,25,26,138,139,140
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Glenn Curtiss-Air Pilot No. 1
Experiments and Triumphs of One of America’s Pioneers of Speed—Third in a Remarkable Series of Articles
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Frank Parker Stockbridge
GLENN CURTISS was the least excited of all those who watched him fly the White Wing, that day in May, 1908. Jubilant over their first real flight without a smash, the members of the Aerial Experiment Association gathered in the “think-orium” to consider “how come.
PopularScience_19270501_0110_005_0025.xml
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Rats That Go to College
Petted rodents that live thirty times as fast as men give us new knowledge about our minds and bodies
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H. C. DAVIS
THE rat, ancient enemy of mankind, now has been sent to college as the friend of mankind. While the vicious alley rat is hunted and destroyed as a carrier of disease, his favored cousin, the white rat, is being pampered and educated by science in remarkable experiments calculated to make the human race healthier, happier and wiser.
PopularScience_19270501_0110_005_0026.xml
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A Race of Man-Eating Lions!
How strange African breed transmits lust for human blood from generation to generation, and causes terror in native villages
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CAPT. C. R. S. PITMAN
THE man-killers! A cry of warning spreads terror through the African village. Women and children scurry to safety. Black-skinned warriors hurriedly gather, armed with nets and spears. Quick death, in the form of a band of fierce man-eating lions, has stalked once more upon the community, slaying and devouring two of the inhabitants.
PopularScience_19270501_0110_005_0027.xml
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30,31,143
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Magic Fingers Win Double Fame
Josef Hofmann, World-Famous Pianist, Has Given Us Auto Springs and Other Inventions
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JACK O’DONNELL
IT WAS a cold, clear day. Every boy in Berlin whose blood was thicker than water tingled with the call of the ice ponds. Skates dangled and glittered in the sunlight as girls and boys, chatting gayly, hurried toward the Spree river or the other ponds and waterways of the German capital.
PopularScience_19270501_0110_005_0028.xml
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Test Your Mechanical Ability
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THE new tests remarkable on this page afford an entertaining and reliable way of measuring your general mechanical ability without the use of workshop equipment. The only tool required is a sharp-pointed pencil. They are so simple that anyone can enjoy them; yet actual practice has proved them to be accurate yardsticks in determining your skill and speed in working with your hands.
PopularScience_19270501_0110_005_0029.xml
article
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33,34,150
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You Have Asked Me—
Questions about Cellars, Floors, Roofs, Masonry, Lumber, Heating, Construction, and Here Are Some of My Answers
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JOHN R. McMAHON
FASCINATING letters from all parts of the United States and Canada, not to mention Japan and points yet more remote, flock into the home building department of this magazine. They commend, criticize, debate, and mostly ask for specific information in regard to the writer's particular problem.
PopularScience_19270501_0110_005_0030.xml
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35,144,145
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Is Your Yard Yours?
How the “Zero Mark" at Washington Fixes Property Boundaries and Aids Surveyors
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CAPT. EDWIN T. POLLOCK,
THERE are many “zero marks.” A scientist working with temperatures bases his calculations on what he calls “absolute zero,” —273.1° centigrade (—459.6° Fahrenheit), a point no one wishes to see or feel; an almost imaginary point where there is an entire absence of heat.
PopularScience_19270501_0110_005_0031.xml
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36,37,38,118,119,120,121,122,123
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Bare Hands
A fascinating novel of science, adventure and ingenuity—From the Stone Age to Civilization
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HAWTHORNE DANIEL
ON A pleasure cruise among the Aleutian Islands, Parker and Thornton, partners in a Seattle engineering firm; Williams, a young naval architect, and Kelly, a deck hand, fell into the clutches of Kiska Joe, murderous half-breed seal poacher.
PopularScience_19270501_0110_005_0032.xml
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Don’t Fall for “Bargain" Tubes
I Did—Once—and Found That, Though They Made a Fine Test in the Store, in the End They Were an Expensive Luxury
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NEWTON BURKE
THE check that I made out to pay for our new radio outfit put quite a dent in my bankroll, but the wife and I both agreed it was worth it. The set worked fine, and in fact we found that, while it had cost us a lot of money, it promoted economy in other ways.
PopularScience_19270501_0110_005_0033.xml
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Trifles That Count in Radio
How to Check Up on Possible Weak Points in Your Antenna, Tubes, Wiring and Loudspeaker
Five Rules for Good Reception
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ALFRED P. LANE
YOUR radio receiving equipment is like a chain. It is no stronger than its weakest link. And there are possible chances for defective links in the path of incoming signals all the way from the end of the antenna to the loudspeaker. At every step the radio signal follows the proper path only when it is forced into it.
PopularScience_19270501_0110_005_0034.xml
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Hints for Radio Beginners
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When You Use Power Tubes
An Output Transformer or Filter Will Improve Tone
When to Use Insulators
A B C’s of Radio
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WHEN you decide to bring your old set up to date by installing modern audio transformers and a power tube in the last stage of audio amplification, remember that, for best results, you must use either an output transformer or a choke and condenser to keep the heavy plate current from the power tube out of the windings of the loudspeaker.
PopularScience_19270501_0110_005_0035.xml
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Talking Movies Take Step Ahead
Invention Prints Sounds and Pictures on Same Film, Uses Standard Movie Projector
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ALDEN P. ARMAGNAC
CALLED the “photophone” by its inventor, C. A. Hoxie, a new device to merge motion pictures and sound, developed after several years of experiment at the Schenectady, N. Y., laboratories of the General Electric Company, amazed spectators recently at its first demonstration.
PopularScience_19270501_0110_005_0036.xml
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Our Growing Debt to Science
How Lightning and Earthquakes Travel—New Paper Textile Developed—The Perfect Mutton Sheep—Other Advances
Animal Breeding Cuts Living Costs
Amateurs Discover Comets
Fireflies’ Secret Sought
Animal Life Chemically Started
Rich Children Steal, Poor Honest?
Trailing Ancient Man
He Makes Earthquakes to Order
Woman Invents Paper Textile
Mind Reading Tested by Radio
Minnesota Makes Radio Record
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THE world’s supplies of vital necessities from the farm, such as meat, milk, wool and grain, depend more and more on remarkable experiments breeding better animals and better crops. Recently, for example, experts of the animal breeding research department Edinburgh University completed experiments which promise farmers the ideal mutton sheep—one which will produce an abundance of finest wool, and also will bear twins with surprising regularity.
PopularScience_19270501_0110_005_0037.xml
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Puzzling Angles Spring to Life
Winners in Our Stomachion Contest
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IN OUR February issue we offered $100 in cash prizes to readers submitting the best original designs of human figures made from the fourteen pieces of the Stomachion puzzle game of Archimedes. A number of the prize winning entries are reproduced here.
PopularScience_19270501_0110_005_0038.xml
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46
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Wild Mongols Torture American Scientists
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TWO men who dared torture at the hands of savage Mongolians to obtain scientific trophies in strange forbidden lands—William J. Morden, leader of the expedition and James L. Clark, assistant director of the American Museum of Natural History —returned the other day from their perilous search.
PopularScience_19270501_0110_005_0039.xml
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Are We Electric Batteries?
Tiny Life Cell, 4/1000th Inch Long, Electrified Amazing Experiment, Becomes More Active Than Ever
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H. H.DUNN
WITH a glass tube whose point is smaller than a singlelife cell, a microscope and a supply of electricity, a scientist in the zoÖlogy department of the University of California has just demonstrated that protoplasm, the substance of which all living organisms are made, is an excellent conductor of electricity.
PopularScience_19270501_0110_005_0040.xml
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48
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Mice Army Invades California County
Jupiter Swings In
New Record for Seaplanes
A Banquet in a Smokestack
Way Found to Film Bacteria
Diamonds in America
Flies Taste with Their Feet?
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HASTILY organized squads of men in Kern County, Calif., are resorting to warlike methods to check an unprecedented migration of house mice. Ousted by torrential rains from a dry lake basin, millions of the rodents have overwhelmed neighboring towns.
PopularScience_19270501_0110_005_0041.xml
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Factory Power from Tropic Seas!
Frenchman Plans Strange Floating Islands to Harness Ocean's Heat
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THAT floating factories drawing their power from the ocean depths may some day dot the tropical seas is the amazing prediction of Prof. Georges Claude, French inventor, in suggesting a method of harnessing the vast stores of “thermal energy” of warm seas.
PopularScience_19270501_0110_005_0042.xml
article
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Wood Waste Helps Make Fine Swedish Iron
Dinosaur Tracks in Connecticut
No Poison in Carbon Paper
London Statue Aged by Coffee
Glass Bell Hothouses
New Picture-Telegram Service between Berlin and Vienna
Builds Rotor Windmill
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WHEN a forest log is sawed into planks, there is bound to be some waste; the circular, bark-covered outside will not make trim boards. Instead of throwing it away, however, Swedish mill owners have found a new use for it in the country’s blast furnaces.
PopularScience_19270501_0110_005_0043.xml
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51
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California “Picks and Carries” Its Desert Roads after Sandstorms
Your Footprints Betray You
Who Works for a Living?
A Home Gym
This Tire Patch Sticks!
Tests Office Clatter
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ORDINARY road building methods would be of little avail in the desert region of California’s Imperial Valley, where paths are obliterated overnight by avalanches of wind-blown sand. The California Highway Commission solves the problem by building portable roads, which may be taken up bodily and removed to new locations alter wind-storms.
PopularScience_19270501_0110_005_0044.xml
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Will Mystery Car Break World’s Speed Record on Florida Sands?
The Biggest Hands in Baseball
Temperature Runs Clock
Motor Ship Has “Electric Cow”
Toy Race Track Offers Thrills
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WITH this strange dachshund of a car, Major H. O. D. Seagrave, British automobile racer, will soon try to break the world's speed record on the beach at Daytona, Florida. His mystery “eight" is said to develop a thousand horsepower with its two engines.
PopularScience_19270501_0110_005_0045.xml
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53
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Skiers Learn on Chemical Snow
Marvelous Violin Varnish
Movies Linked with Radio Talk
He Makes Wind Run His Clock
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SO THAT Londoners may practice skiing right at home and be experts by the time their annual holiday in the Britisher’s winter paradise—Switzerland —comes around, a leading London department store has installed a real practice slide in its own building.
PopularScience_19270501_0110_005_0046.xml
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Seventy-Year-Old Woman Invents Novel Fire Escape
Strange Plane Resembles Bat
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MORE grotesque than the bat that inspired its design, this amazing airplane, representing man’s latest attempt to learn new secrets of speed from the flight of birds, recently made its first trial flight in Paris. Even the propellers are of fantastic construction, though the machine is powered by the newest Blériot motors, of the type designed for commercial airplanes.
PopularScience_19270501_0110_005_0047.xml
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54
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Racing Shell Built of Metal
Camera for “Picture Memos”
Invents Typewriter Desk-Case
This Gaff Hook Gets the Fish
Upheaval Lifts Atlantic Cable
KNOW YOUR CAR
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SO LIGHT that you could put it on your shoulder and go for a hike, the latest racing shell is made of duralumin, the same light metal alloy that goes into the framework of modern aircraft. Built for the Naval Academy at Annapolis, the new one-man boat weighs only twenty-six pounds, or half as much as the cedar shells in which Navy oarsmen have in the past developed their skill for rowing regattas; and the designer, Walter Hoover, expects it to slip through the water with scarcely an effort.
PopularScience_19270501_0110_005_0048.xml
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55
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Chicago Sends Traffic Violators to School
Machine to “Feed Your Pulse”
Film Improves Night Snapshots
Vest Pocket Speed Indicator
Police Motorcycle Jack
How Much Do You Know of the World You Live In?
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TRAFFIC law offenders in Chicago, after being duly sentenced and fined, are now given the further benefit of class instruction to teach them better observance of the city’s traffic regulations. The class above is learning what the traffic lights mean.
PopularScience_19270501_0110_005_0049.xml
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He Runs His Auto on Acetylene Gas
Nail Clipper Easy to Use
Warm Feet for Traffic Cops
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NOW they’re running cars on acetylene in thrifty France. M. Jaquelin, a French engineer, has discovered that this familiar gas; once widely used for auto headlamps, works admirably as a substitute for gasoline—and cuts his gas bill in two, he says.
PopularScience_19270501_0110_005_0050.xml
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56
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Device Opens Garage Door Electrically
A Record Cut of Douglas Fir
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WITH the new automatic device illustrated, your garage door will swing open as if pushed by unseen hands when the auto wheel runs over a ground plate in the driveway. Two arms on the doors are operated when the plate throws an electric switch controlling the motor of the door mechanism.
PopularScience_19270501_0110_005_0051.xml
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Magnetic Roller Rids Roads of Nails
Holds Check Stubs in Place
New Metal Alloy Found
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WHEN you make a fresh entry in your check book, the old stubs can't spring back and blur the ink if you have one of these handy holders to keep the pages in place. A curved sheet of metal holds back the leaves, while three prongs keep the device from slipping.
PopularScience_19270501_0110_005_0052.xml
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57
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Portable Folding Garage Shaped like Mushroom
Tiny Plane for Submarines
Mightiest Land Fire Engine
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DRIVE up to this novel portable garage, raise a handle, and the entire front half will slide up so you can run the car inside! A pull on the chain hanging from the handle closes it again. Made of two steel sections that telescope into each other, as shown in the two pictures, the garage reduces building construction to its simplest terms.
PopularScience_19270501_0110_005_0053.xml
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Practical New Inventions Born of Human Needs
Noninflammable Fuel for Airplanes, Radio Device to Eliminate Batteries, Poison Liquor Other Devices
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PopularScience_19270501_0110_005_0054.xml
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It Sews Seams with Liquid Metal Stitches
Phone Silencer Guards “Asides”
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TEA kettles, pails, milk cans and automobile bodies are today “sewn together” at the seams with liquid metal by new welding machinery that remarkably resembles the sewing machine in operation. As in a sewing machine, the metal sheet, with edges overlapped, is fed between two rolls, and an electric current interrupted a thousand times a minute deposits spots of metal that serve as stitches to bind together the lapped metal.
PopularScience_19270501_0110_005_0055.xml
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Puffs of Smoke Add Realism to War Map
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WHILE wreckers recently tore down the apartment building that had housed it, and literally left it without a roof over its head, a New A ork City bank continued to do business as usual. Even after the structure had been completely razed, depositors found the bank still standing in a corner of the excavation, its walls and plate glass front gone but protected from the elements by a light wooden framework and a covering of tar paper.
PopularScience_19270501_0110_005_0056.xml
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Amazing Model Depicts Entire Oil Field
Their School’s a Railway Car
Hooks to Hold Scaffolds
Now—Gold-Plated Cloth
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A RECENTLY constructed masterpiece of model making, made in California, depicts in miniature every phase of the entire oil industry. It covers an area twenty feet long and is divided into four sections—the wells, the refinery, transportation, and uses in daily life.
PopularScience_19270501_0110_005_0057.xml
article
61
61
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New Machine Prints, Scores and Cuts Cartons
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CARTONS to hold your groceries, cigarettes or electric light bulbs are whisked out of the remarkable machine below at the amazing rate of 1200 a minute, stamped complete with their colored designs. Using a roll of paper instead of flat sheets, according to its Minnesota inventors, eliminates waste at the irregular ends of the carton.
PopularScience_19270501_0110_005_0058.xml
article
62
62
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Device to Burn Small-Size Coal
Seasick? Try Oxygen
Now the “Skyscraper” Garage
12-Year-Old Bird Sets Record
Fight Deer with Moth Balls
Scientist Offers New Theory of Earth’s Origin
Wealth in Abandoned Ore
Houses “Poured” in England at One a Day
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NOW you can burn smaller coal in your furnace, at a tremendous saving, according to Dr. W. A. Noel of the U. S. Department of Agriculture. Government scientists have perfected a device that, placed in the fire box, creates the strong draft needed to burn “buckwheat” coal.
PopularScience_19270501_0110_005_0059.xml
article
63
63
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Talking Movie Camera “Photographs” Sound with Pictures
Wants Bright-Colored Buildings
Outdoor Map Covers Garden
“Canned Heat” for Italy’s Railway Trains
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IN THE latest talking movie process, known as “movietone,” Fox-Case of New York believe they have achieved the utmost in simplification. Both pictures and sound are photographed by a single camera. Within the camera, a glowing violet lamp of new chemical composition prints on the film margin voices picked up by a microphone.
PopularScience_19270501_0110_005_0060.xml
article
64
64
[no value]
[no value]
Benda, Maker of Masks, Satirizes Humans
Lights Attract Food for Fish
Hearing through Finger Tips
Science Studies the “Hot Dog”
Surgical Tools Carry Lamps
Models Ships He Served On
Airmen Told to Chew Gum
Deep-Sea Diving on Land
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THOUGH masks are as old as civilization itself, it remained for W. T. Benda, famous illustrator and artist, of New York City, to create an entirely new and distinctly modern type. Many a star of the stage is willing enough to hide her own face behind such a creation as that in the picture, to which the artist is applying a few finishing touches.
PopularScience_19270501_0110_005_0061.xml
article
65
65
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[no value]
She's Boston's Only Woman Watchmaker
French Secretly Developing High-Speed Auto Engine
Earthworms Sing, Says Science
Seeks Fortune Raising Frogs
One Auto to Every Three Adults in the Country !
Woman Runs Two Big Garages
Nelson’s Ship His Model
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CAN motors be designed to drive racing cars faster and faster? Or is there a mechanical speed limit beyond which no motor can go? With twelve cylinders said to be no larger than demi-tasse cups, a strange new motor being tested secretly by a French automobile company in Paris is expected to drive a car at 250 miles an hour.
PopularScience_19270501_0110_005_0062.xml
article
66
66,67
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odern 1 ools omemakers
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PopularScience_19270501_0110_005_0063.xml
article
68
68
Sam Loyd's Page
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How Share Are Your Wits?
Try Th ese Fascinating Tests to Measure Your Abilities
The Nine-Celled Square
The Circulating Coin
Tricky Digits
Mental Scissors Cutting
A Joker in the Scales
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I NSPECTION of the design above, a square containing nine cells, reveals that at eight points of intersection the number of branches is odd. The rule for unicursal analysis is to (Ii vide the total number of odd nodes (points of intersection) by two, to de termine the number of continuous lines necessary to construct the figure.
PopularScience_19270501_0110_005_0064.xml
article
69
69,141
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Are You a Throttle Hopper?
Needless “Stepping on It" Strains Every Working Part of 1 our , Says Gus
What Was Wrong with Captain Horne’s Car?
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MARTINBUNN
PERCIVAL STEBBINS jammed' the throttle down to the floor boards and vigorously thumbed the horn button preparatory to making his usual wild dash up Marley Hill. He waved his hand disdainfully to the driver of a spindly little coupe as he flashed by.
PopularScience_19270501_0110_005_0065.xml
article
70
70
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[no value]
Seven Useful Kinks for Your Car
How to Solder Tank Floats, Build Clothes Compartment, Plug Leaks
Ten Dollars for an Idea!
Protects Garage Padlock
These Jacks Will Save Tires
Removes Spindle Bushings
Save the Running Board
Cork Will Plug Water Leaks
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WHEN you attempt to solder up a leak in a carburetor or vacuum tank float, the heat of the iron causes the air inside the float to expand. The air pressure produced then forces bubbles of air through the hole you are trying to solder, making it very difficult to seal the hole.
PopularScience_19270501_0110_005_0066.xml
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71
71
[no value]
[no value]
Western Electric
[no value]
Western Electric
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0067.xml
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72
72
[no value]
[no value]
STANLEY TOOLS
[no value]
STANLEY TOOLS
[no value]
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[no value]
PopularScience_19270501_0110_005_0068.xml
article
73
73,101,102
THE HOME WORKSHOP
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A Bench That Takes No Room
How You Can Make a Removable Woodworking Top for Use on Any Kitchen Table
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E. E. ERICSON
IVCJv of space for a workshop or even for a workbench is j proving more and more to be a serious difficulty in the average small home. The modern fiat or apartment is planned without any thought of giving the handy man a chance to express himself in mechanical work.
PopularScience_19270501_0110_005_0069.xml
article
74
74,75,92,93,94
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A Boy Can Build This Boat
Speedy Toy Motor Cruiser Run by Radio C-Battery—Costs Little
How to Mix Plastic Finishes with Flat Wall Paints
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FREDERICK P. BERRIAN
JJST mention motor boats to a boy and see the broad smile that lights his face. That’s true, too, of many men, for there is something exceedingly fascinating about a toy motor boat that will run speedily under its own power. Of all the shop problems I have tried with boys in my manual training classes, nothing has been as popular as the making of motor boats.
PopularScience_19270501_0110_005_0070.xml
article
76
76,100
[no value]
[no value]
How to Re finish Your Floors
Three Ways to Remove Old Varnish—Bleaching Stains with Oxalic Acid—Sandpapering—Applying Wood Filler
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RALPH G. WARING
FLOORS are one of the greatest sources of household care. They are scuffed and scraped like no other woodwork and the moment they are neglected, their scratched and dingy appearance becomes an eyesore. To keep them in condition is not particularly difficult, but you must know just what to do and how to apply and preserve the various floor finishes.
PopularScience_19270501_0110_005_0071.xml
article
77
77,104
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Graceful Gate-Leg Tables
Bill of Materials
How to Repair Chair Seats
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HERMAN HJORTH
THE gate-leg table Is peculiarly well fitted to the modern home. It can be folded so as to take up a minimum of space, and extended cpiickly and with scarcely no effort when a larger table is needed. As the principles involved in its construction are simple and do not call for great manual skill, the making of gate-leg tables should prove of interest to the home cabinetmaker.
PopularScience_19270501_0110_005_0072.xml
article
78
78
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Bob Builds a Loudspeaker
He Has Few Tools and No Experience, but Turns Out a Neat and ATellow-Toned Instrument
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CHELSEA FRASER
WHEN i )>raised Bob s new five-tube radio receiver, he was pleased, but lie frowned as he looked at the loudspeaker. It was of the horn type and, judging from the style, must have been on the radio dealer's shelf for two years or more. “ What do you think of that stovepipe?”
PopularScience_19270501_0110_005_0073.xml
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79
79
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[no value]
MILLERS FALLS COMPANY
[no value]
MILLERS FALLS COMPANY
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0074.xml
article
80
80,96,97
[no value]
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Our Viking Ship Takes Shape
If You Haven't Started the New Model,Begin Now
After the gunwales have been glued and clamped to the hull, the joint is made doubly secure with J4 in. long bank pins
Fitting the ribs in place
Easily Made Trellises
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CAPTAIN E. ARMITAGE MCCANN
READERS who have followed the instructions given last month for making the hull of a Viking ■ship model will have already realized that it is indeed a swift craft we are building. This will be even more evident when we get the gunwales on, which we shall now proceed to do.
PopularScience_19270501_0110_005_0075.xml
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81
81
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Advertisement
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PopularScience_19270501_0110_005_0076.xml
article
81
81,109
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Corner Cabinet for Breakfast Room
Cleaning Paint Brushes
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HAROLD P. STRAND
A CORNER cabinet to display one's favorite set of dishes is a very useful addition for that ever-popular nook, the breakfast room. The cabinet illustrated is attractive, takes up little room, and also has a convenient drawer for silver. The material is kiln-dried whitewood.
PopularScience_19270501_0110_005_0077.xml
article
82
82,112,113
BETTER SHOP METHODS
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Hints on Using Lathe Tools
Grinding and Setting Them to Do Plain Turning
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ALBERT A. DOWD
S AY, Bill Harvey,” Simpkins remarked confidentially to Smith, the young machinist, “I hear Tom is going to cjuit the foreman’s job after awhile and go to raising fruit and chickens out on his farm. Did you hear anything about it?” “No. I didn’t,” Harvey replied in surprise.
PopularScience_19270501_0110_005_0078.xml
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83
83
[no value]
[no value]
THE L. S. STARRETT CO.
[no value]
THE L. S. STARRETT CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0079.xml
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84
84
[no value]
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WESTERN CLOCK COM PAN Y
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WESTERN CLOCK COM PAN Y
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PopularScience_19270501_0110_005_0080.xml
article
84
84,85
Few Tools Are Needed to Build This
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Attractive Garden Seat
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KENNETH R. LA VOY
PLACED conveniently near the flower garden or in a shady spot on the lawn, a garden bench looks decorative and is especially inviting and restful after a tilt with weeds or lawn mower. The writer recently built one that he thinks will be deemed attractive, and submits it herewith to his fellow workshop enthusiasts.
PopularScience_19270501_0110_005_0081.xml
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85
85
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THE PALMOLIVE COMPANY
[no value]
THE PALMOLIVE COMPANY
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PopularScience_19270501_0110_005_0082.xml
article
85
85
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Outdoor Plant Stands Are Easy to Build
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MATTHEW MCK. Vf RIGHT
BOXES filled with growing plants and vines are picturesque additions to the home grounds. Many types of stands may be made for this purpose and three especially simple ones are illustrated. Cypress is one of the best woods for plant stand boxes because it is so little subject to decay.
PopularScience_19270501_0110_005_0083.xml
article
86
86,87
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Two-Way Block Systems for Model Railways
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IN OUR December issue there appeared an article showing how to make an automatic block signal system for model railways. The diagram and instructions gave constructional details and wiring directions for a system that would work with the trains running in one way only.
PopularScience_19270501_0110_005_0084.xml
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86
86
[no value]
[no value]
TWINPLEX SALES CO.
[no value]
TWINPLEX SALES CO.
[no value]
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[no value]
PopularScience_19270501_0110_005_0085.xml
article
87
87
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A “Comicull” Fly with Maple Seed Wings
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F. CLARKE HUGHES
THIS fly is made from a clothespin, two maple seeds and six lengths of electric bell wire. The legs are placed in holes in the body and, like the wings, are fastened with glue or sealing wax. A coat of clear varnish or shellac is applied to stiffen the wings.
PopularScience_19270501_0110_005_0086.xml
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87
87
[no value]
[no value]
BROWN &. SHARPE MFG. CO.
[no value]
BROWN &. SHARPE MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0087.xml
article
88
88
[no value]
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How to Fix Gardening Tools
Sharpening y Cleaning and Oiling Lawn Mowers— Repairing a Hose—Rakes, Hoes and Spades
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ROBERT S. LEWIS
NOW is the time to fix the lawn mower, hose and gardening tools and forestall those sudden breaks which always come at “just the wrong time.” First, the lawn mower. It is sure to need a good oiling. Use a heavy cylinder oil, such as for motors; light oil doesn't stay “put.”
PopularScience_19270501_0110_005_0088.xml
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88
88
[no value]
[no value]
TRIMONT MFG. CO.
[no value]
TRIMONT MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0089.xml
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89
89
[no value]
[no value]
NICHOLSON FILE CO.
[no value]
NICHOLSON FILE CO.
[no value]
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PopularScience_19270501_0110_005_0090.xml
article
90
90,91
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[no value]
How to Solve Block Puzzles
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READERS of the preceding articles on the block puzzle, otherwise known as the “Chinese cross,” may be interested to learn that it is possible to tell by simple inspection of six blocks or their drawings whether they will fit perfectly or have an internal cavity.
PopularScience_19270501_0110_005_0091.xml
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90
90
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PRENTISS VISE CO.
[no value]
PRENTISS VISE CO.
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PopularScience_19270501_0110_005_0092.xml
article
91
91
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Oar Supports for Rowboat
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ROBERT PAGE LINCOLN
MANY a fish is lost because the line gets entangled around an oar dragging in the water. Likewise, oars are in the way if they are lifted into the boat. A simple method of overcoming this fault is shown ABOVE.
PopularScience_19270501_0110_005_0093.xml
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91
91
[no value]
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CLEMSON BROTHERS, INC.
[no value]
CLEMSON BROTHERS, INC.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0094.xml
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92
92
[no value]
[no value]
Boucher Inc
[no value]
Boucher Inc
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0095.xml
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93
93
[no value]
[no value]
BOSTON VARNISH CO.
[no value]
BOSTON VARNISH CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0096.xml
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94
94
[no value]
[no value]
Larus & Brother Company
[no value]
Larus & Brother Company
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[no value]
[no value]
PopularScience_19270501_0110_005_0097.xml
article
95
95
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[no value]
Home Workshop Chemistry
Simple Formulas that Will Save Time and Money
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PAPER can be used for many things besides writing, wrapping and printing. It can be made to act as a preservative and as a means for preventing the tarnishing of silverware. It may be made waterproof, fireproof and fat proof. These are only a few of the many and varied uses of specially treated paper.
PopularScience_19270501_0110_005_0098.xml
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95
95
[no value]
[no value]
The Yale & Towne Mfg. Co.
[no value]
The Yale & Towne Mfg. Co.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0099.xml
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96
96
[no value]
[no value]
CHAS. F. BINGLER SONS
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CHAS. F. BINGLER SONS
[no value]
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[no value]
PopularScience_19270501_0110_005_0100.xml
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96a
96a
[no value]
[no value]
R. J. REYNOLDS TOBACCO CO.
[no value]
R. J. REYNOLDS TOBACCO CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0101.xml
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96b
96b
[no value]
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GOODELL-PRATT COMPANY
[no value]
GOODELL-PRATT COMPANY
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0102.xml
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97
97
[no value]
[no value]
L C Smith & Corona Typewriters Inc
[no value]
L C Smith & Corona Typewriters Inc
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[no value]
[no value]
PopularScience_19270501_0110_005_0103.xml
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98
98
[no value]
[no value]
AMERICAN NOKOL COMPANY
[no value]
AMERICAN NOKOL COMPANY
[no value]
[no value]
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PopularScience_19270501_0110_005_0104.xml
article
98
98
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[no value]
The SHIPSHAPE HOME
Replacing a Common Snap Switch with a Flush Switch
How to Varnish Wall Paper
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TO REPLACE a common snap switch with a flush switch is a relatively simple undertaking for the amateur electrician. First open the main house switch. Take off the knob and cover of the snap switch (Fig. 1), disconnect the wires and remove the switch entirely.
PopularScience_19270501_0110_005_0105.xml
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99
99
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Advertisement
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PopularScience_19270501_0110_005_0106.xml
article
99
99
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The Shipshape Home
Many Uses for Linoleum
Rubber Holder for Brooms
Hanging Tile Wallpaper
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DISCARDED pieces of linoleum can he put to many uses in keeping a home shipshape. Kitchen and other tables with worn and cracked tops may he reconditioned by covering them with linoleum. If painted, varnished or shellacked, the linoleum makes a smooth, durable top.
PopularScience_19270501_0110_005_0107.xml
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100
100
[no value]
[no value]
ESTWING MFG CO.
[no value]
ESTWING MFG CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0108.xml
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101
101
[no value]
[no value]
HARLEY'DAVIDSON MOTOR CO.
[no value]
HARLEY'DAVIDSON MOTOR CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0109.xml
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102
102
[no value]
[no value]
Advertisement
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[no value]
PopularScience_19270501_0110_005_0110.xml
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102
102
[no value]
[no value]
Woodworking Machine Co.
[no value]
Woodworking Machine Co.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0111.xml
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102
102
[no value]
[no value]
RADIALL CO.
[no value]
RADIALL CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0112.xml
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103
103
[no value]
[no value]
Advertisement: POPULAR SCIENCE MONTHLY
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POPULAR SCIENCE MONTHLY
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PopularScience_19270501_0110_005_0113.xml
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104
104
[no value]
[no value]
PATHEX, Inc.
[no value]
PATHEX, Inc.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0114.xml
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104
104
[no value]
[no value]
AMERICAN CHIME CLOCK COMPANY
[no value]
AMERICAN CHIME CLOCK COMPANY
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0115.xml
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104
104
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[no value]
Advertisement
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PopularScience_19270501_0110_005_0116.xml
article
104
104
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Small Vise Provides Feed for Drilling
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OWEN LOVEJOY
HOLES of varying size can be drilled through iron up to ¼in. in thickness with the inexpensive drilling device illustrated. The machine is an inexpensive polishing head driven by an old vacuum cleaner motor, the many uses of which have been described previously in POPULAR SCIENCE MONTHLY.
PopularScience_19270501_0110_005_0117.xml
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105
105
[no value]
[no value]
MINIATURE SHIP MODELS
[no value]
MINIATURE SHIP MODELS
[no value]
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PopularScience_19270501_0110_005_0118.xml
article
106
106,107
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[no value]
A Stand for Shoe Polishing
Has Convenient Foot Rest and Compartment for Cleaning Materials, Brushes and Cloths
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WILLIAM W. KLENKE
"WHAT is the trouble, Frank?" I asked, as lie strolled into the school shop with a downcast face. “I was called down at. drill inspection in the gym for not having my shoes polished," he replied. “Well, that suggests a good idea for your next model—a shoe polishing stand.”
PopularScience_19270501_0110_005_0119.xml
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106
106
[no value]
[no value]
BREMER-TULLY MFG. CO.
[no value]
BREMER-TULLY MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0120.xml
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107
107
[no value]
[no value]
Indian Motocycle Co.
[no value]
Indian Motocycle Co.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0121.xml
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108
108
[no value]
[no value]
Rutland Patching Plaster
[no value]
Rutland Patching Plaster
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0122.xml
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108
108
[no value]
[no value]
BUESCHER BAND INSTRUMENT CO.
[no value]
BUESCHER BAND INSTRUMENT CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0123.xml
article
108
108
[no value]
[no value]
Crane Built at Low Cost
For Use on Emergency JUrecking Car of Small Garage
Gripping Small Polished Rods
[no value]
[no value]
GEORGE H. CAPPEL
SOME kind of a wrecking crane is almost a necessity in every commercial garage, large or small. Many establishments are able to purchase one of the rather elaborate cranes on the market, which, when mounted on a wellpainted truck, makes a good moving advertisement of the garage.
PopularScience_19270501_0110_005_0124.xml
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109
109
[no value]
[no value]
Interstate Electric Company
[no value]
Interstate Electric Company
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0125.xml
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109
109
[no value]
[no value]
Advertisement: Popular Science Monthly
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[no value]
Popular Science Monthly
[no value]
[no value]
PopularScience_19270501_0110_005_0126.xml
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109
109
[no value]
[no value]
THE PECK, STOW & WILCOX COMPANY
[no value]
THE PECK, STOW & WILCOX COMPANY
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0127.xml
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110
110
[no value]
[no value]
THE UPSON COMPANY
[no value]
THE UPSON COMPANY
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0128.xml
advertisement
110
110
[no value]
[no value]
CHISEL-EDGE-CLAW HAMMER COMPANY
[no value]
CHISEL-EDGE-CLAW HAMMER COMPANY
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0129.xml
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110
110
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0130.xml
advertisement
110
110
[no value]
[no value]
Geo. W. Walker Co.
[no value]
Geo. W. Walker Co.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0131.xml
article
110
110
[no value]
[no value]
Toolmaker’s Buttons Used As “Mike” Checks
How I Make Small Tap Boxes Last a Long Time
[no value]
[no value]
[no value]
IN THE illustration below is shown a two-in-one tool—a set of toolmaker’s buttons that serves also as a set of “mike” checks. The diameter of the buttons is .500 in. and lengths are .750, .625, .500, and .375 in. respectively. They are hardened, ground and lapped all over.
PopularScience_19270501_0110_005_0132.xml
article
111
111
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[no value]
Tricks to Help You Drill Round Stock
[no value]
[no value]
[no value]
[no value]
IN THE illustration below is shown a simple yet accurate way of drilling a central hole transversely through round stock. It is equally applicable to plain and threaded work and can be used in any shop. So little time is required for the necessary preparations that it will often pay to use the method even for drilling a single piece.
PopularScience_19270501_0110_005_0133.xml
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111
111
[no value]
[no value]
SARGENT & COMPANY
[no value]
SARGENT & COMPANY
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0134.xml
advertisement
111
111
[no value]
[no value]
Advertisement
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[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0135.xml
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112
112
[no value]
[no value]
E. C. ATKINS & CO.
[no value]
E. C. ATKINS & CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0136.xml
advertisement
112
112
[no value]
[no value]
ELECTRO MAGNETIC TOOL CO.
[no value]
ELECTRO MAGNETIC TOOL CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0137.xml
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112
112
[no value]
[no value]
Shipman-Ward Mfg. Co.
[no value]
Shipman-Ward Mfg. Co.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0138.xml
article
113
113
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[no value]
Power-Driven Screw Driver for Small Work
[no value]
[no value]
[no value]
G. A. LUERS
ELECTRICAL shops or machine shops assembling relatively small parts in quantities, will find the tool illustrated convenient for driving screws. It can be used either in a speed lathe or on a drill press. There is a holder of machine steel with a taper shank to fit the machine upon which the tool is to be used.
PopularScience_19270501_0110_005_0139.xml
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113
113
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Advertisement
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PopularScience_19270501_0110_005_0140.xml
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113
113
[no value]
[no value]
Buffalo Jewelry Mfg. Co.
[no value]
Buffalo Jewelry Mfg. Co.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0141.xml
article
114
114
[no value]
[no value]
Sling Steadies Steel Beams for Punching
Sheet of Glass Keeps Thread Tool and Gage Aligned
[no value]
[no value]
[no value]
IN A Denver steel shop, standard 8 in. channels, which are to be punched for rivets, are balanced in a sling made as shown. Two hooks 10 in. long are used and over these a short section of 2 by ½in. bar, with a hole near each end, is slipped. With a man at one end to steady them, the beams are carried easily by the overhead crane to the motor-driven punch, and held up while the holes are being made.
PopularScience_19270501_0110_005_0142.xml
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114
114
[no value]
[no value]
The David Maydole Hammer Co.
[no value]
The David Maydole Hammer Co.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0143.xml
advertisement
114
114
[no value]
[no value]
Standard Laboratories, Inc.
[no value]
Standard Laboratories, Inc.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0144.xml
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114
114
[no value]
[no value]
ELTO OUTBOARD MOTOR
[no value]
ELTO OUTBOARD MOTOR
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0145.xml
article
115
115
[no value]
[no value]
Extension Handle for Inside Caliper
Substitute Drill Chuck
Specially Marked Caliper for the Stock Room
[no value]
[no value]
H. MOORE
IN ORDER that long holes might be measured with more certainty, the writer made a handle for his inside caliper as shown in the accompanying illustration. It is of sheet iron and may be readily detached from the caliper. A strip of sheet metal is bent back on itself and offset to go over the joint of the caliper.
PopularScience_19270501_0110_005_0146.xml
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115
115
[no value]
[no value]
The B.V. D. Co., Inc.
[no value]
The B.V. D. Co., Inc.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0147.xml
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115
115
[no value]
[no value]
CAILLE MOTOR COMPANY
[no value]
CAILLE MOTOR COMPANY
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0148.xml
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115
115
[no value]
[no value]
Electro-Magnetic ToolCompany
[no value]
Electro-Magnetic ToolCompany
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0149.xml
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116
116
[no value]
[no value]
Smooth-On Mfg.Co.
[no value]
Smooth-On Mfg.Co.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0150.xml
article
116
116
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[no value]
Homemade Instrument for Perspective Drawings
[no value]
[no value]
[no value]
BOYD R. ALVORD
ACENTROLINEAD is desirable in drafting rooms where numerous perspective drawings have to be prepared, but it is a rather expensive instrument. To make one, however, is a relatively simple undertaking. The instrument illustrated was made of celluloid such as is used for triangles.
PopularScience_19270501_0110_005_0151.xml
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116
116
[no value]
[no value]
HARDIN~LAVIN Co.
[no value]
HARDIN~LAVIN Co.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0152.xml
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116
116
[no value]
[no value]
FOOD DISPLAY MACHINE CO.
[no value]
FOOD DISPLAY MACHINE CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0153.xml
article
117
117
[no value]
[no value]
Rubber Hose Extensions for Drill Handles
When to Use an Oversize Drill Before Tapping
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[no value]
V. A. LYMAN
ELECTRIC hand drills, especially when used on heavy work and in difficult positions, have a tendency to jump out of a lone operator's hands if the drill happens to bind in the hole. In one shop a great aid in helping the workman to retain his grip was found in the form of two short sections of old hose slipped over the handles of the motor.
PopularScience_19270501_0110_005_0154.xml
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117
117
[no value]
[no value]
SOUTH BEND LATHE WORKS
[no value]
SOUTH BEND LATHE WORKS
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0155.xml
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117
117
[no value]
[no value]
The Parks Ball Bearing Machine Co.
[no value]
The Parks Ball Bearing Machine Co.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0156.xml
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117
117
[no value]
[no value]
CHISEL-EDGE-CLAW HAMMER COMPANY
[no value]
CHISEL-EDGE-CLAW HAMMER COMPANY
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0157.xml
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118
118
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0158.xml
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119
119
[no value]
[no value]
WACO TOOL WORKS
[no value]
WACO TOOL WORKS
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0159.xml
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119
119
[no value]
[no value]
THE GEROLD COMPANY
[no value]
THE GEROLD COMPANY
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0160.xml
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119
119
[no value]
[no value]
ARKOGRAF PEN CO.
[no value]
ARKOGRAF PEN CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0161.xml
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119
119
[no value]
[no value]
LOFTIS BROS. & CO.
[no value]
LOFTIS BROS. & CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0162.xml
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120
120
[no value]
[no value]
BURGESS BATTERY COMPANY
[no value]
BURGESS BATTERY COMPANY
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0163.xml
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121
121
[no value]
[no value]
SIMONDS SAW AND STEEL COMPANY
[no value]
SIMONDS SAW AND STEEL COMPANY
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0164.xml
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121
121
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0165.xml
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121
121
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0166.xml
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121
121
[no value]
[no value]
BENNETT HOMES
[no value]
BENNETT HOMES
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0167.xml
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122
122
[no value]
[no value]
L.S. BRACH MFG. CO.
[no value]
L.S. BRACH MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0168.xml
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122
122
[no value]
[no value]
M. Hohner, Inc.
[no value]
M. Hohner, Inc.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0169.xml
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122
122
[no value]
[no value]
HAMMARLUND MFG. CO.
[no value]
HAMMARLUND MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0170.xml
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123
123
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0171.xml
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124
124
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0172.xml
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125
125
[no value]
[no value]
THE AMPLION CORPORATION OF CANADA, LTD.
[no value]
THE AMPLION CORPORATION OF CANADA, LTD.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0173.xml
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125
125
[no value]
[no value]
THE STERLING MFG. CO.
[no value]
THE STERLING MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0174.xml
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126
126
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0175.xml
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127
127
[no value]
[no value]
THE ELECTRO THERMAL CO.
[no value]
THE ELECTRO THERMAL CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0176.xml
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127
127
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0177.xml
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127
127
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0178.xml
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127
127
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0179.xml
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128
128,130,131,132,133,134
[no value]
[no value]
Money Making Opportunities
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0180.xml
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129
129
[no value]
[no value]
COYNE ELECTRICAL SCHOOL
[no value]
COYNE ELECTRICAL SCHOOL
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0181.xml
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135
135
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0182.xml
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136
136
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0183.xml
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136
136
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0184.xml
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137
137
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0185.xml
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138
138
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0186.xml
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139
139
[no value]
[no value]
VICTOR J. EVANS & CO.
[no value]
VICTOR J. EVANS & CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0187.xml
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140
140
[no value]
[no value]
The NEW YORK ELECTRICAL SCHOOL
[no value]
The NEW YORK ELECTRICAL SCHOOL
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0188.xml
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141
141
[no value]
[no value]
MUNN & CO.
[no value]
MUNN & CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0189.xml
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141
141
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0190.xml
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141
141
[no value]
[no value]
THE LANDON SCHOOL
[no value]
THE LANDON SCHOOL
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0191.xml
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141
141
[no value]
[no value]
RANDOLPH & CO.
[no value]
RANDOLPH & CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0192.xml
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142
142
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0193.xml
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143
143
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0194.xml
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144
144
[no value]
[no value]
NATIONAL ELECTRICAL SCHOOL
[no value]
NATIONAL ELECTRICAL SCHOOL
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0195.xml
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144
144
[no value]
[no value]
UNIVERSAL PLUMBING SCHOOL
[no value]
UNIVERSAL PLUMBING SCHOOL
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0196.xml
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144
144
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0197.xml
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144
144
[no value]
[no value]
METALLIC LETTER CO.
[no value]
METALLIC LETTER CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0198.xml
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145
145
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0199.xml
article
146
146
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[no value]
Here Are Correct Answers to Questions on Page 55
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[no value]
[no value]
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1. Until recent years this curious vegetable was a rarity in America. The fact that it is now so much commoner is due to the development of a great artichoke industry near Half Moon Bay, California. This hay is very foggy, and fog is good for artichokes.
PopularScience_19270501_0110_005_0200.xml
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146
146
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0201.xml
article
147
147
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Answers to the Sam Loyd Tests on Page 68
The Joker in the Scales
Mental Scissors Cutting
A Visual Promenade
The Circulating Coin
Answers to the Mechanical Tests on Page 32
Block Test
Tangled Line Test
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[no value]
[no value]
The method of ascertaining the true weight of an article weighed on an off-center scale is to take the square root of the product of the amounts registered on the two sides. In the sketch, these amounts were 8 and 6⅛. The square root of their product, 7, is the true weight of the bottle.
PopularScience_19270501_0110_005_0202.xml
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147
147
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0203.xml
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148
148
[no value]
[no value]
Advertisement
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[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0204.xml
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148
148
[no value]
[no value]
MEYER BOTH COMPANY
[no value]
MEYER BOTH COMPANY
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0205.xml
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148
148
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0206.xml
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149
149
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[no value]
Advertisements
[no value]
[no value]
[no value]
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PopularScience_19270501_0110_005_0207.xml
tableOfContents
149
149
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[no value]
CONTENTS of This Issue
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PopularScience_19270501_0110_005_0208.xml
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150
150
[no value]
[no value]
FEDERAL SCHOOL OF ILLUSTRATING
[no value]
FEDERAL SCHOOL OF ILLUSTRATING
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0209.xml
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151
151
[no value]
[no value]
INTERNATIONAL CORRESPONDENCE SCHOOLS
[no value]
INTERNATIONAL CORRESPONDENCE SCHOOLS
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0210.xml
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152
152
[no value]
[no value]
Advertisement
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[no value]
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0211.xml
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153
153
[no value]
[no value]
RHODES MFG. CO.
[no value]
RHODES MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0212.xml
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154
154,155,156
[no value]
[no value]
LICCETT & MYERS TOBACCO CO.
[no value]
LICCETT & MYERS TOBACCO CO.
[no value]
[no value]
[no value]
PopularScience_19270501_0110_005_0213.xml