Issue: 19270401

Friday, April 1, 1927
APRIL 1927
4
True
110
Sunday, December 28, 2014

Articles
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Popular Science
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PopularScience_19270401_0110_004_0001.xml
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Advertisements
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RADIO CORPORATION
RADIOTRON UX-171
RADIO CORPORATION
RADIOTRON UX-200
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PopularScience_19270401_0110_004_0002.xml
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1
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THE STUDEBAKER CORPORATION
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THE STUDEBAKER CORPORATION
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PopularScience_19270401_0110_004_0003.xml
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2
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THEN AND NOW
AN EDITORIAL
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E. C. W.
THE other evening I was talking with an old friend. Some twist in the conversation recalled our school days. We began to compare ourselves as we were then with our sons and daughters of today. "What beats me," said my friend, "is that my youngsters really seem to enjoy going to school.
PopularScience_19270401_0110_004_0004.xml
masthead
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masthead
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PopularScience_19270401_0110_004_0005.xml
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3
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Fansteel Products Co., Inc.
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Fansteel Products Co., Inc.
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PopularScience_19270401_0110_004_0006.xml
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4
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Taylor Instrument Companies
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Taylor Instrument Companies
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PopularScience_19270401_0110_004_0007.xml
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5
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THE VENICE COMPANY
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THE VENICE COMPANY
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PopularScience_19270401_0110_004_0008.xml
article
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6
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A BUDGET PLAN That Will Help You Get Ahead
FIXED CHARGES
FLUCTUATING CHARGES
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WALLACE AMES
DON’T talk to me about budgets," expostulated Ted Carter. "We’ve tried them all, and all we have to show is a lot of loose leaf books, special forms and cash accounts which never would balance. Why, we set out the first of this year dead-set on making a budget work and already it is way out of joint."
PopularScience_19270401_0110_004_0009.xml
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Advertisement
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PopularScience_19270401_0110_004_0012.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_19270401_0110_004_0013.xml
article
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8
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Do You Know How to Pick a Good Oil Burner?
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A MAN who recently had an oil burner installed in his home was telling how he went about selecting it. I marveled at the haphazard, even careless, way he had made his choice and yet I knew him to be a shrewd and careful buyer of other things that cost a fraction of the price of an oil burner.
PopularScience_19270401_0110_004_0014.xml
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9
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Advertisements
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ALL-AMERICAN RADIO CORPORATION
Reproducer
ALL-AMERICAN RADIO CORPORATION
Constant-B
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PopularScience_19270401_0110_004_0015.xml
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10
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A. H. Grebe & Co., Inc.
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A. H. Grebe & Co., Inc.
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PopularScience_19270401_0110_004_0016.xml
article
11
11,12,13,104
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A Job for One in a Million!
Why Only a Few Men Can Photograph Cities, Chart Forests, Explore Jungles from Aircraft
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H. A. BRUNO
SIX thousand feet above the town of Corning, Iowa, two veteran air-men swept across the blue sky in an old war-time De Haviland plane, making a photographic air map of the countryside below. At the controls sat Harlan Guerney, ex-war pilot, intent on battling a stubborn wind that tried to thrust his machine from the course charted on a survey map before him.
PopularScience_19270401_0110_004_0017.xml
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14
14,15,16,105,106,107,108,109
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TISHY
Because they tagged him with that name, he made a tragic blunder—How he redeemed himself nobly in the hiss of icy seas
Seaweed a Valuable Food
Paris to Build Auto Subways
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CAPTAIN DINGLE
THERE seemed no good reason for giving Burton such a nickname. As he stood up there on the navigating bridge of the Diadem in the swirling snow, handling the great steamer with the art of genius, he looked very much of a man, in spite of his apparent lack of inches.
PopularScience_19270401_0110_004_0018.xml
article
17
17,18
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The Truth about poison Liquor
How UncleSam Wages Bitter Chemical War to Put Industrial Alcohol Beyond the Bootleggers’ Reach
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FREDERIC DAMRAU
OF LATE, Uncle Sam has been on trial before the bar of public opinion, charged with no less a crime than willful and premeditated murder. The Government of the United States, and particularly the officials who enforce prohibition, stand accused of deliberately poisoning industrial alcohol and so injuring or killing those who unlawfully buy and drink the liquor concocted from it by bootleggers.
PopularScience_19270401_0110_004_0019.xml
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19
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Amazing New Engines of War
One-man tanks give artillery new mobility, while huge monsters haul guns, lead attack, or belch poison gas
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ARMOR-CLAD scooters dashing across a battlefield, spitting leaden death from protruding gun barrels—steel juggernauts that belch clouds of lethal fumes—will these land craft decide tomorrow's battles? Latest of peace-time inventions, the new tanks are ready to play their part should war again grip the world.
PopularScience_19270401_0110_004_0020.xml
article
20
20,21,23,134,135,136
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Conquerors of the North
Stories of Wonderful Dogs with Hearts of Steel, and of Wild Races with Death across Arctic Snows
Leonhard Seppala, who Breeds and Races the Fastest Teams of the North, Tells of His Amazing Adventures
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Jack O ’ Donnell
BOBBY BROWN, beloved Alaskan musher, prospector and dog racer, was dying. A buzz saw had severed one leg above the ankle and had thrown him violently against a piece of shafting, breaking the other leg and causing internal injuries. There wasn't a doctor in Dime Creek, where the accident happened.
PopularScience_19270401_0110_004_0021.xml
article
22
22,24,113,114
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Glenn Curtiss—Air Pilot No. 1
Impressions and Reminiscences of Stirring Days of Experiment and Achievement That Changed the World
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FRANK PARKER STOCKBRIDGE
I DON'T remember when or how I first heard that a couple of young men named Wright had actually flown a heavier-than-air machine," said Glenn Curtiss in response to a question I put to him as we chatted one day in his Florida home. "Perhaps Captain Baldwin and I discussed it after the news of their experimental flights at Kitty Hawk had appeared in the newspapers; but if we did, it didn’t make a lasting impression on me.
PopularScience_19270401_0110_004_0022.xml
article
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25
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Electric Hands Prevent Wrecks
New Railway Safety Devices Work When Engineer Fails
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L. U. REAVIS
LATEST triumph of mechanical skill in the fight against railroad accidents, a new automatic signal system, just perfected, guards the safety of passengers on trial sections of two great railroads. On this page is explained pictorially the operation of the amazing devices.
PopularScience_19270401_0110_004_0023.xml
article
26
26,27,125,126
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M en who Blast for Liquid Gold
How Nitroglycerin, Strangest of Deadly Explosives, Is Used to Release Vast Stores of Oil
How Do You Window-Shop?
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JESSE F. GELDERS
TWO autos were racing each other along a road in northern Oklahoma. From the opposite direction appeared another car, carrying a rack of odd-looking tin cylinders at its side. The racers came abreast of each other just as they passed the third machine, and though it swerved to avoid a collision, the inside car grazed the rack, sent the cylinders clanging to the ground, and raced on without a stop.
PopularScience_19270401_0110_004_0024.xml
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28
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Now—Traffic Rules for Aircraft
Government Regulations Provide No Speed Limit, but Give Balloons Right-of-Way over Planes and Require License Numbers to Be Visible
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H. C. DAVIS
DID you get your 1927 pilot's license? It's something new. Like the rules for auto drivers are the traffic rules for aircraft just issued for the first time by the Aeronautics Branch of the U. S. Department of Commerce. Reading them, it is easy to imagine the day when the air will be thick with airplanes, and traffic officers may direct the streams of flyers from captive balloons.
PopularScience_19270401_0110_004_0025.xml
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29
29,30,32,128
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Marvels of Modern Scaffolding
How new steel-swung "trapezes" remove limitations to building construction and add thrills to worker's job
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ORVILLE H. KNEEN
CAN you imagine how it would feel to do your day’s work standing on a swinging scaffold forty stories above the ground? Probably not. Neither could I until a few weeks ago, when I determined to find out what it would be like. Hoisted, by permission of a friendly skyscraper foreman, up through forty stories or so of steel, I climbed gingerly out upon a narrow board walk of two-by-ten-inch planks, and crept to the edge.
PopularScience_19270401_0110_004_0026.xml
article
31
31,132,133
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What Does Your Garage Cost You?
Here Are Practical Hints That Will Add to Its Convenience and Reduce Expenses
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JOHN R. MCMAHON
OUR first garage was an said extra stall in a stable," said the reminiscing old-timer. “Its heating system consisted of the body heat given out by the livestock, which generally kept the radiator from freezing in winter. Lighting was by an oil lantern hung on a nail.
PopularScience_19270401_0110_004_0027.xml
article
33
33,130
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Shall We Scrap the Yardstick?
With two kinds of miles, three pounds, many arbitrary units, our measuring system is called antiquated
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ALDEN P. ARMAGNAC
"ARR-MAY! Rah! Rah! TEAM!" Across the gridiron, hurled from the throats of the cadets that pack the stand, comes the Millimeter Yell. There is a history behind it. Shortest football cheer of West Point’s repertoire, the Millimeter Yell is named after a diminutive fragment of a measuring scale based on a mysterious beam of red light—a scale universally known as the metric system.
PopularScience_19270401_0110_004_0028.xml
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34
34,35
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The Strangest Art in the World
How Taxidermy Makes Animals "Live Again," Shown in a Remarkable Set of Photos of the late Carl Akeley’s Methods—The Pictures Are the First to Show the Complete Operation and Took Seven Months to Obtain—The Animal Is an East Indian Wild Ox
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PopularScience_19270401_0110_004_0029.xml
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36
36,37,38,39,110,111,112
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Bare Hands
Here is a brand-new kind of novel—A thrilling romance of ingenuity and scientific skill put to a supreme test on a desolate Arctic island
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HAWTHORNE DANIEL
"You don’t need much air pressure for a blast furnace only five feet high," said Thornton, as he pumped away at the first rabbit skin bellows completed
PARKER and Thornton, partners in a Seattle engineering firm, and Williams, a young naval architect, were enjoying a pleasure cruise among the Aleutian Islands in the latter's yawl when, with their deck hand, Kelly, they fell into the hands of Kiska Joe, a notorious half-breed seal poacher, and his crew of native Aleuts.
PopularScience_19270401_0110_004_0030.xml
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39
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FIRE-SHY
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EDMUND M.LITTELL
Those of you who enjoyed "Midge" in our March issue will be thrilled by this new short story by the same author. You’ll recognize some of the same steel-hardened, lovable characters in new and tensely dramatic situations.
PopularScience_19270401_0110_004_0031.xml
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40
40,41,138
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Ne w Wings for Your Voice
How improvements in telephony, telegraphy, radio and other mechanical methods of transmitting ideas are adding convenience and safety to modern life
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ROBERT E. MARTIN
sTAND in the by!" Something is wrong in the submarine's whirring interior. Despite rapid-fire orders and skilful maneuvers, the nose of the steel porpoise slowly settles, until it points straight to the depths, and only the tip of her tail remains above the waves.
PopularScience_19270401_0110_004_0032.xml
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42
Hints for Radio Beginners
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Do You Ever Forget Switches?
How to Simplify Your Current Control—Other Ideas
Testing B-Eliminators
Test Battery Frequently
Grid Leak Affects Tone
A B C’s of RADIO
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TURNING on and off the filament switch on your radio receiver is all that is necessary to put the set into operation and stop it again if it is run with a storage battery to light the filaments of the tubes and with dry cells to supply the B-battery current.
PopularScience_19270401_0110_004_0033.xml
article
43
43,44
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How Broadcasting is Improving
Better Transmission and Station Chains to Do Much For Programs
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GEORGE LEE DOWD
EVERYWHERE engineers, broadcast directors and others are working on plans to improve the quality of radio programs. Perhaps none is more important to the owner of a radio set than those which have resulted in the improved quality of broadcast music.
PopularScience_19270401_0110_004_0034.xml
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45,127
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Don’t Blame Your Radio Set!
Why You Get Several Stations at Once
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ALFRED P. LANE
IN THE last few months hundreds of readers have written to POPULAR SCIENCE MONTHLY complaining about the poor results they are getting from their radio sets, and asking for suggestions to help them improve their reception. They want to know, in particular, what causes the terrific whistling noises that they hear and why they are unable to separate the different stations.
PopularScience_19270401_0110_004_0035.xml
article
46
46,47,139,140
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I Catch My Wild Beasts by the Tail!
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Wynant Davis Hubbard
THERE,Inkos, in that bush! See, it is looking at you. A big one!" Longone, one of my native black boys, pointed excitedly to a clump of evergreen bushes. For a moment I could distinguish nothing, then suddenly the green shadow I was looking at took on the hideous shape of a huge python! Its supple body, coiled menacingly, looked as big around as a man's thigh.
PopularScience_19270401_0110_004_0036.xml
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48,49
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Catching Up with Science
New Silk from Old, Sounds Now "Seen," Other Advances
Food Crops Increased by Science
Guncotton front Garbage
Voice Secrets Revealed by Camera
Now—the Pedigreed Oyster
He Draws Electricity from Light
Old Silk Made into New
Circles Earth in Sub for Science
Light Rays Source of Life?
Now Airplanes Excel Insects
Serum for Rheumatism
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IMPORTANT new ways of developing larger and better food crops have come to light through recent scientific experiments. For example, Prof. R. B. Harvey of the University Farm, St. Paul, Minn., reports that he has speeded up the ripening of fruits by subjecting them to gas attacks with two ingredients of common city gas, ethylene and propylene.
PopularScience_19270401_0110_004_0037.xml
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50,143
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The First Beauty Parlor
Our ancestors cut their hair with clamshells—Some strange ancient inventions—How much your dog can understand—Facts about cyclones—Fascinating books
Trapping the Breeze Under Full Sail
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THOMAS M. JOHNSON
DID you know that the first beauty parlor was equipped with a pair of clamshells? Or, if it was run by “Madame” Somebody, with a complete outfit of sharks' teeth? Perhaps a sharp edged flat stone stood in the corner. That was all that was needed in those primitive times, but with such tools our ancestors gave themselves the first haircuts.
PopularScience_19270401_0110_004_0038.xml
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51
INGENIOUS INVENTIONS
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Huge Desert Ship to Speed over Sand on Wheels
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AN OCEAN liner on land is the monster vehicle proposed by a German inventor, and pictured in our artist's conception above. J. C. Bishoff, of Kiel, the designer, sees desert travelers of the future embarking on a land ship that surrounds its 300-odd passengers with all the luxurious comfort of a modern sea liner.
PopularScience_19270401_0110_004_0039.xml
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52
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A Boat That Couldn’t Sink—It Bails Itself
Navy Tests Oil Burner for Planes
Two Feet Wide—a Real Auto!
London to Have Rubber Street
This Automobile Horn “Talks”!
Some Calipers!
Electric Device Subs for Heart
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IN THE belief that he has perfected a system that would make boats unsinkable, Fred N. Nelson, of Seattle, Wash., plans to demonstrate the model craft above before Navy officials. A unique self-bailer designed to eject water automatically from the hold, and a safety ventilator near the stern which admits air AIRPLANES were run successfully on heavy oil instead of gasoline in recent tests, and special Diesel engines, burning this inexpensive fuel, may soon be installed in Navy planes, according to Dr. Joseph S. Ames of the National Advisory Committee for Aeronautics.
PopularScience_19270401_0110_004_0040.xml
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53
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Parachute Jumper Misses Death by Inches
Radio “Eyes” for Ships in Fog
Austrian Invents Rotary Motor
Amazing Engine Has Fewer Parts
New Auto Light Reduces Glare
Giant Rope Weighs Five Tons
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THIS parachute jumper had a few tense moments when he catapulted from a speeding scout plane directly over the dreadnaught California, during recent maneuvers of the Pacific Fleet off San Pedro, California. A lucky wind bore There are four double-headed pistons, each working in two cylinders! As one cylinder fires, the gas in the opposite one is compressed, and a moment later the cycle is reversed.
PopularScience_19270401_0110_004_0041.xml
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54
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School Opens Butcher Course to Women
Tobacco Pouch “Pours” Easily
New Autogiro Model
Silent Rifle Penetrates Steel
Checkerboard of 14,000 Pieces!
KNOW YOUR CAR
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MODERN women are abandoning the rolling-pin for the cleaver, judging from this picture from the Smith-field School, Saffon Hill, London, England, where the recent admittance of women to the butchering course has met with amazing response.
PopularScience_19270401_0110_004_0042.xml
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55
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Miniature Golf Course for Business Men
Invents Pump for Oil Wells
Handy Blotter Fits on Pen
What An Angry Elephant Did
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AFTER several years of experimenting, Adolph Chanosky, a young oil operator of Texas, invented a novel pump which, he says, will take oil, sand and water from the deepest part of any oil well. The pump, which also can be used as a sand sucker, consists of two pieces of tubing, as shown in the illustration above, one inserted into the other, a small ring, and a piece of padding.
PopularScience_19270401_0110_004_0043.xml
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55
55,137
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How Much Do You Know of the World You Live In?
Here Are Correct Answers to Questions on Page 55
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IF you are as observant as you should be, you ought to be able to answer at least half of the following questions, selected from hundreds sent in by readers. Turn to page 137 for the correct answers. 1. What is the greatest astronomical observatory in the world?
PopularScience_19270401_0110_004_0044.xml
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56,57
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Here and There with the Inventors
Amazing Speed Boat $12, Midget Gasoline Motor, Auto Crime Laboratory, Cigar Lighter and Other New Devices
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PopularScience_19270401_0110_004_0045.xml
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58
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He Whittles Chains from Toothpicks
Ship Models of Bone
Half-Pinters—Quart Appetites!
World’s Largest Searchlight
They Made a Hobby Pay
New Loud Phonograph Invented
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TWENTY miniature pairs of pliers which unfold from a strip of wood a quarter of an inch wide and sixteen inches long, is only one of the whittling feats claimed by David D. Rankin, of Detroit, Mich. To pass the time on a rainy day, he will carve a five-link chain from a toothpick, and one with ten links, or, perhaps, three pairs of pliers, from a single ordinary matchstick.
PopularScience_19270401_0110_004_0046.xml
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59
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Last Word in Aerial Railway Luxury
Now—the Airplane Trunk!
A Speed Boat Disaster Made to Order
His Galleon Wins Prize
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SUSPENDED high above the Bavarian Alps, the workman below seems as comfortable and unperturbed as the occupant of the luxurious cabin at the right, which is the standard rolling equipment on the new Alpine aerial railway up the Zugspitze, recently completed.
PopularScience_19270401_0110_004_0047.xml
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60
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Rides Off Cliff, Parachute Fails to Open!
Freak Tree Loops the Loop
Meet the Acrobatic Musicians!
Old and New in Strong Boxes
Pale Hands Warm, Red Cold?
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WHEN Fred Osborne, daring air pilot of Santa Monica, California, drove a motorcycle at high speed over the edge of the Huntington cliff north of that city recently, he carried on his back a parachute that he expected would lift him from the saddle and float him down gently to earth.
PopularScience_19270401_0110_004_0048.xml
article
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61
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Remarkable Kite Built to Carry a Passenger
Who Says Bike’s Out-of-Date?
First Eel Egg Found by Woman
Tropic Fish Has Nest Like Bird
Microphone for Witnesses
Golf Watch Ticks Off Strokes
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SIX men have all they can do to hold this giant man-carrying kite by long ropes while it soars aloft. It has carried its inventor, George A. Argabrite, of Los Angeles, Calif., far above the earth more than two hundred times without mishap. As seen on the ground, in the picture below, its lines suggest an airplane.
PopularScience_19270401_0110_004_0049.xml
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62
62,63
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Sixteen Ways to Lighten Home Tasks
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PopularScience_19270401_0110_004_0050.xml
article
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64
Sam Loyd Offers
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Six New Tests of Your Wits
Brain-T easers to Show Whether Words, Facts or Figures Are Four Forte
Are You a Good Strategist?
Are You Quick at Figures?
Do You Spot Clues Quickly?
Can You Find the Right Words?
What Was the Correct Time?
A Test of Organizing Ability
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HERE’S a new version of the daisy game of prognosticating your matrimonial future by plucking thepetals of a flower: The game is played by two persons, who take turns plucking the petals. At each play the player is privileged to remove any one petal from the circle, or two petals, provided they be contiguous, none having been removed from between them.
PopularScience_19270401_0110_004_0051.xml
article
65
65,142,143
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When Your Wife Learns to Drive
Gus Gives Some Pointers for the Motorist
What Was Wrong with Spratt’s Car?
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MARTIN BUNN
NOW I suppose we'll have a little peace and quiet around here," Gus Wilson grumbled to his partner, Joe Clark, as the latter finally stopped hammering on the fender of his flivver. A truck had side-wiped Joe’s car on the way to the Model Garage that morning.
PopularScience_19270401_0110_004_0052.xml
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66
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Practical New Aids to Motorists
Syphon Oil Bottle, Gripper Mud Hook, Socket Wreach Set and Other Handy Time-Savers
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PopularScience_19270401_0110_004_0053.xml
advertisement
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67
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Advertisement
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PopularScience_19270401_0110_004_0054.xml
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68
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Advertisement
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PopularScience_19270401_0110_004_0055.xml
article
69
69,71,78,79,81
THE HOME WORKSHOP
[no value]
N ew uses for Plastic Paints
Building an Ornamental Fireplace without Masonry— A Treasure Chest—Walls and Ceilings—Other Novelties
[no value]
[no value]
E. M. OREN
AS A RESULT of Eleanor's insistence, we had redecorated the walls and ceilings of three of the rooms in our house with rough texture and color effects. How we accomplished it I told you in an article in the January issue. Briefly, we decorated the walls of our living room in Spanish texture, the walls of our dining room in Italian style, the ceilings of both in a monastic finish, and the kitchen in a Colonial stipple.
PopularScience_19270401_0110_004_0056.xml
article
70
70,88,89
[no value]
[no value]
Here Is a Ship Model All Can Build
This Colorful Viking Vessel Is Easy to Make and Is Inexpensive—The Materials Cost Two Dollars or Less
[no value]
[no value]
CAPT. E. A. MCCANN
THE time is some eleven hundred years ago and the scene the rune-carved ancestral hall of Varin on the shores of Varinsfjord in Norway. Varin is growing old. He is rich in everything but land. His hall is replete with gold, fine fabrics and great treasure of other lands, but his odal is small.
PopularScience_19270401_0110_004_0057.xml
article
72
72,90,91
THE HOME WORKSHOP
[no value]
You Can Build This Armchair
A Cross-Legged Seat That Is Remarkably Comfortable— Inexpensive to Make, but of Rich and Costly Appearance
[no value]
[no value]
CHARLES A. KING
WHEN we get tired of auto tripping, I do hope we can have a camp or bungalow as well planned and furnished as this!" exclaimed Mildred. "I have never sat in a chair that seemed quite as comfortable.” She leaned back contentedly in the roomy folding armchair and smiled at Helen and Val.
PopularScience_19270401_0110_004_0058.xml
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73
73
[no value]
[no value]
THE SHALER COMPANY
[no value]
THE SHALER COMPANY
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0059.xml
article
74
74,92
THE HOME WORKSHOP
[no value]
What My Shop Has Taught Me
How to Keep Bench and Tools in Order and Ran a Lathe with a Salvaged Motor —Hints on Homemade Furniture
[no value]
[no value]
HAROLD P. STRAND
SO MANY beautiful, useful articles can be made with a few tools, from a rough, shapeless piece of wood, that I just can't understand men who profess no interest in building or creating things with their hands. They miss a great deal in life. My own desire to build things began early.
PopularScience_19270401_0110_004_0060.xml
article
75
75
THE HOME WORKSHOP
[no value]
Home Workshop Chemistry
Simple Formulas that Will Save Time and Money
[no value]
[no value]
[no value]
PHOTOGRAPHS may be tinted or stained simply by immersing the prints in various salt solutions. In this process the main consideration is absolute cleanliness. All possible sources of pollution must be removed and the prints must be washed thoroughly in plenty of water after being removed from the bath.
PopularScience_19270401_0110_004_0061.xml
advertisement
75
75
[no value]
[no value]
NORTH BROS. MFG. CO.
[no value]
NORTH BROS. MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0062.xml
article
76
76,100,101,102
BETTER SHOP METHODS
[no value]
Easy Ways to Do Recessing Jobs
Chucking work Quickly in a Turret Lathe—Using a "Pull" Cut to Avoid Chattering—Hints on Facing
[no value]
[no value]
ALBERT A. DOWD
THESE castings have to be recessed," said the machine shop foreman one morning to young Harvey Smith. "The original blueprint showed a straight hole, so we reamed them all to size, and now the engineering department gives me a blueprint like this (A in Fig. 1) and tells me to recess fifty of these pieces.
PopularScience_19270401_0110_004_0063.xml
advertisement
77
77
[no value]
[no value]
THE L. S. STARRETT CO.
[no value]
THE L. S. STARRETT CO.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0064.xml
advertisement
78
78
[no value]
[no value]
Larus & Bro. Co.
[no value]
Larus & Bro. Co.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0065.xml
advertisement
79
79
[no value]
[no value]
THOMAS NELSON & SONS
[no value]
THOMAS NELSON & SONS
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0066.xml
advertisement
79A
79A
[no value]
[no value]
THE SHERWIN-WILLIAMS COMPANY
[no value]
THE SHERWIN-WILLIAMS COMPANY
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0067.xml
advertisement
79B
79B
[no value]
[no value]
Advertisement
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[no value]
[no value]
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[no value]
PopularScience_19270401_0110_004_0068.xml
advertisement
80
80
[no value]
[no value]
HARLEY-DAVIDSON MOTOR COMPANY
[no value]
HARLEY-DAVIDSON MOTOR COMPANY
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0069.xml
advertisement
81
81
[no value]
[no value]
The Palmolive Company
[no value]
The Palmolive Company
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0070.xml
advertisement
82
82
[no value]
[no value]
Advertisement
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PopularScience_19270401_0110_004_0071.xml
article
82
82
[no value]
[no value]
Tops Made of Spools and Clothespins
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[no value]
[no value]
F. CLARKE HUGHES
KNOB ends cut from ordinary clothespins and sections from thread spools are the materials necessary for making the tops illustrated. All four types of these quaint little "comiculis” may be made by combining the same materials in different ways.
PopularScience_19270401_0110_004_0072.xml
article
82
82
[no value]
[no value]
How to Replace a Flush Electric Switch
[no value]
[no value]
[no value]
GEORGE A. WILLOUGHBY
MODERN types of electric switches and cover plates often will improve the appearance and convenience of a lighting installation out of all proportion to the moderate cost of the materials which must be purchased to make the change. Whenever you have to replace an old flush switch, either because it is shabby or has become defective, the necessary steps are as follows: First, remove the cover from the old switch by taking out the two screws.
PopularScience_19270401_0110_004_0073.xml
advertisement
83
83
[no value]
[no value]
Advertisements
[no value]
MINIATURE SHIP MODELS
MAYFLOWER
MINIATURE SHIP MODELS
SANTA MARIA
[no value]
[no value]
PopularScience_19270401_0110_004_0074.xml
advertisement
84
84
[no value]
[no value]
PRENTISS VISE CO.
[no value]
PRENTISS VISE CO.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0075.xml
article
84
84
[no value]
[no value]
A Strong Joint for Boxes
How to Lay Out and Make a Tongued Corner with Backsaw and Chisels
[no value]
[no value]
EMANUEL E. ERICSON
[no value]
PopularScience_19270401_0110_004_0076.xml
article
85
85
[no value]
[no value]
How to Thumb-Slot Your Phone Book
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[no value]
[no value]
ARMSTRONG PERRY
ONE of the annoying experiences in life is to try to find a name in a telephone directory, when time is money or when the loss of a minute may mean the loss of a train. A man in England is reported as making $.5,000 a year by going from office to office and house to house thumb-slotting telephone directories at two shillings each.
PopularScience_19270401_0110_004_0077.xml
advertisement
85
85
[no value]
[no value]
BOSTON VARNISH CO.
[no value]
BOSTON VARNISH CO.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0078.xml
advertisement
86
86
[no value]
[no value]
STAR HACK SAW BLADES
[no value]
STAR HACK SAW BLADES
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0079.xml
article
86
86,94
[no value]
[no value]
A Built-in Bookcase for Your Bedroom
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[no value]
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EDWIN M. LOVE
FAVORITE books that find their way into one's own room for the pleasant privacy of bedtime reading may be kept accessible, yet neatly in order, by the use of the small built-in bookcase illustrated. The construction is very simple, and it can be installed merely by cutting out a rectangle of plaster between two studs (upright wooden wall supports).
PopularScience_19270401_0110_004_0080.xml
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87
87
[no value]
[no value]
GOODELL-PRATT COMPANY
[no value]
GOODELL-PRATT COMPANY
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0081.xml
advertisement
88
88
[no value]
[no value]
BOUCHER
[no value]
BOUCHER
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0082.xml
advertisement
89
89
[no value]
[no value]
Brown & Sharpe Mfg. Co.
[no value]
Brown & Sharpe Mfg. Co.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0083.xml
article
89
89
[no value]
[no value]
Making a Big Bed Safe for Children’s Use
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[no value]
[no value]
FRANK I. SOLAR
YOU may never have heard of a bed rail "saddle," but you have heard of the little folks falling out of bed. And bed rail saddles are intended to prevent just that. They are added to a big bed whenever it is to be used by small children and are stored away when not in use.
PopularScience_19270401_0110_004_0084.xml
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90
90
[no value]
[no value]
The Peck, Stow & Wilcox Company
[no value]
The Peck, Stow & Wilcox Company
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0085.xml
article
91
91
[no value]
[no value]
Straightening a Saw
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[no value]
[no value]
F. H. T.
A FRIENDLY carpenter recently showed me how he removes a "kink" in a handsaw blade. He laid the blade flat on a hardwood block with the bulge of the kink upward. Then, with a nail set or drift and a hammer, he worked along the blade, as indicated by the dotted line, and hammered it flat.
PopularScience_19270401_0110_004_0086.xml
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91
91
[no value]
[no value]
NICHOLSON FILE CO.
[no value]
NICHOLSON FILE CO.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0087.xml
advertisement
92
92
[no value]
[no value]
The David Maydole Hammer Co.
[no value]
The David Maydole Hammer Co.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0088.xml
advertisement
92
92
[no value]
[no value]
Advertisement: POPULAR SCIENCE
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POPULAR SCIENCE
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PopularScience_19270401_0110_004_0089.xml
article
93
93
[no value]
[no value]
Bird House Is Small Copy of Its Owner’s Home
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GORDON H. SEARS
IF YOU enjoy model making, why not build a bird house that is a miniature of your own home? That is what we did. Our bird house, as the illustration shows, is an exact model of our own house. It has a door set in and carved exactly as in the big house and, of course, it is painted the same color.
PopularScience_19270401_0110_004_0090.xml
article
93
93
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[no value]
Mystifying Stamp Box Has Secret Compartment
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[no value]
[no value]
C. A. K.
USUALLY one not in the secret will pick up the top of this box and find merely an assortment of pins, paper clips, rubber bands and pen points. The knowing one, however, will grasp the middle section and lift both it and the top, thus revealing the secret stamp compartment in the bottom box.
PopularScience_19270401_0110_004_0091.xml
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93
93
[no value]
[no value]
The Pompeian Company
[no value]
The Pompeian Company
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0092.xml
advertisement
94
94
[no value]
[no value]
E. C. ATKINS & CO.
[no value]
E. C. ATKINS & CO.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0093.xml
advertisement
94
94
[no value]
[no value]
TRIMONT MANUFACTURING CO.
[no value]
TRIMONT MANUFACTURING CO.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0094.xml
article
95
95
[no value]
[no value]
A Quick and Simple Way to Construct Window Screens
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[no value]
[no value]
A. J. PHELPS
WHEN making window screens, I follow a method that is the height of simplicity. It allows no chance for errors in measurement and, therefore, the screens are bound to go in place without any fitting and planing. The two side pieces or stiles, which are ¾ by 1½ in. stock, are cut to suit the window frame, and the bottom ends are beveled to fit the slant of the sill.
PopularScience_19270401_0110_004_0095.xml
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95
95
[no value]
[no value]
ELECTRO MAGNETIC TOOL COMPANY
[no value]
ELECTRO MAGNETIC TOOL COMPANY
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0096.xml
advertisement
96
96
[no value]
[no value]
WESTERN CLOCK COMPANY: Pocket Ben
[no value]
WESTERN CLOCK COMPANY
Pocket Ben
[no value]
[no value]
PopularScience_19270401_0110_004_0097.xml
article
96
96,97
[no value]
[no value]
The SHIPSHAPE HOME
Gate for Stairway
Patching a Water Tank
Windows in a Partition
Removing Rust
Redeeming a Garage
Pilot Holes for Posts
Preserving Brushes
[no value]
[no value]
[no value]
TO KEEP the baby from climbing up the stairs, I made a wooden gate that could be adjusted to the rise or angle of the stairway and swung back against the wall entirely out of the way. The crosspieces of ⅜ by 1½-in. strips were placed between two ⅞-in. thick uprights at either end and fastened with a 1⅛-in. screw in the center of each joint.
PopularScience_19270401_0110_004_0098.xml
advertisement
97
97
[no value]
[no value]
Indian Motorcycle Co.
[no value]
Indian Motorcycle Co.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0099.xml
article
98
98
[no value]
[no value]
Bench for Small Soldering and Hardening Jobs
[no value]
[no value]
[no value]
HENRY S. LARABY
OLD MAN WILSON was so absorbed iu watching the flame in his new "hearth" that he did not notice the shadow cast by a visitor. "What in the world is this you have?" his visitor asked. Wilson, although somewhat startled, kept his hand on the gas control to the torch as he looked around.
PopularScience_19270401_0110_004_0100.xml
article
98
98
[no value]
[no value]
Drilling Very Hard Steel
[no value]
[no value]
[no value]
H. J. C.
TO DRILL a piece of very hard steel, even when tempered, try the following if other methods have failed: Take a carbon steel drill, grind as required, heat to a bright red, dip in powdered rosin about five seconds, and then plunge into a water bath.
PopularScience_19270401_0110_004_0101.xml
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98
98
[no value]
[no value]
Smooth-On Mfg. Co.
[no value]
Smooth-On Mfg. Co.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0102.xml
advertisement
99
99
[no value]
[no value]
the American Telephone and Telegraph Company
[no value]
the American Telephone and Telegraph Company
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0103.xml
advertisement
99
99
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0104.xml
advertisement
99
99
[no value]
[no value]
Advertisement: Bench Lathe
[no value]
[no value]
Bench Lathe
[no value]
[no value]
PopularScience_19270401_0110_004_0105.xml
advertisement
99
99
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0106.xml
article
99
99
[no value]
[no value]
Quick-Acting Hinged Jig
[no value]
[no value]
[no value]
FRANK N. COAKLEY
FOR drilling five holes in the small block, a binged drill jig was devised as illustrated. The work fits in a channel section that is provided with guide holes and is clamped with the knurled screw. The jig is swung open for cleaning and loading.
PopularScience_19270401_0110_004_0107.xml
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100
100
[no value]
[no value]
Advertisements
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[no value]
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0108.xml
advertisement
101
101
[no value]
[no value]
WACO TOOL WORKS
[no value]
WACO TOOL WORKS
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0109.xml
advertisement
101
101
[no value]
[no value]
OLD TOWN CANOE CO.
[no value]
OLD TOWN CANOE CO.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0110.xml
advertisement
101
101
[no value]
[no value]
ADDISON-LESLIE COMPANY
[no value]
ADDISON-LESLIE COMPANY
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0111.xml
article
102
102
[no value]
[no value]
A Two-in-One Packing Tool
[no value]
[no value]
[no value]
F. W. BENTLEY
FOR packing the bonnets of globe valves and other small stuffing boxes, a handy tool may be made from an old Ford engine valve. It is split for about 1½ in. One prong is drawn into a small hook for starting and ripping out old packing; the other side is drawn to a blunt point for pressing in the new.
PopularScience_19270401_0110_004_0112.xml
article
102
102
[no value]
[no value]
Making Small Faceplates
[no value]
[no value]
[no value]
HOWARD GREENE
FACEPLATE castings for very small lathes are not always available, but ordinary iron pipe flanges answer the purpose quite as well. Obtain a flange with a hole small enough so the threads can be drilled or reamed out; then tap or taper the hole to fit the nose of the lathe spindle.
PopularScience_19270401_0110_004_0113.xml
article
102
102
[no value]
[no value]
Self-Tightening Vees Grip Tubes for Drilling
[no value]
[no value]
[no value]
H. M.
FOR drilling cross holes in round stock, as for cotter pins, these self-tightening vees save time. The jaws are made from ⅛-in. sheet steel, bent and drilled.—H. M.
PopularScience_19270401_0110_004_0114.xml
article
102
102
[no value]
[no value]
Keeping Dampness from Sills
[no value]
[no value]
[no value]
A. M. G.
THE sills of small buildings resting on wooden posts can be prevented from absorbing moisture from their supports, and thus rotting, by laying a few thicknesses of asphalt roofing on each post before the sill are put in place.—A. M. G.
PopularScience_19270401_0110_004_0115.xml
advertisement
102
102
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0116.xml
article
103
103
[no value]
[no value]
Tongs with Wide Jaws for Handling Axles
[no value]
[no value]
[no value]
JOSEPH C. COYLE
TWO 6 by 8 in. sections of old boiler plate, welded on the jaws of tongs which are suspended from a regular air hoist, make it easier to handle heavy journals in a Denver wheel shop. The sections of plate are curved to fit the journals. They are more quickly adjusted and give a much better control of the work than other devices that were previously USED.
PopularScience_19270401_0110_004_0117.xml
article
103
103
[no value]
[no value]
Window Shade Used As Cover for Drawing Board
[no value]
[no value]
[no value]
AVERY E. GRANVILLE
EVERYONE who has left a drawing board overnight knows how disagreeable it is to return the following day and find the drawing covered with dust and dirt. Sometimes a loose cloth is put over the table, but that is likely to blow off, or to carry instruments with it when taken off.
PopularScience_19270401_0110_004_0118.xml
advertisement
103
103
[no value]
[no value]
SOUTH BEND LATHE WORKS
[no value]
SOUTH BEND LATHE WORKS
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0119.xml
advertisement
103
103
[no value]
[no value]
CHISEL-EDGE-CLAW HAMMER COMPANY
[no value]
CHISEL-EDGE-CLAW HAMMER COMPANY
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0120.xml
advertisement
103
103
[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_19270401_0110_004_0121.xml
advertisement
104
104
[no value]
[no value]
Advertisement: UNBREAKABLE
[no value]
[no value]
UNBREAKABLE
[no value]
[no value]
PopularScience_19270401_0110_004_0122.xml
advertisement
104
104
[no value]
[no value]
ESTWING MFG CO.
[no value]
ESTWING MFG CO.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0123.xml
advertisement
105
105
[no value]
[no value]
SIMONDS SAW AND STEEL CO.
[no value]
SIMONDS SAW AND STEEL CO.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0124.xml
advertisement
105
105
[no value]
[no value]
THE AMPLION CORPORATION
[no value]
THE AMPLION CORPORATION
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0125.xml
advertisement
105
105
[no value]
[no value]
SILVER LAKE CO.
[no value]
SILVER LAKE CO.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0126.xml
advertisement
106
106
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0127.xml
advertisement
107
107
[no value]
[no value]
JOHNSON MOTOR COMPANY
[no value]
JOHNSON MOTOR COMPANY
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0128.xml
advertisement
107
107
[no value]
[no value]
Mead CYCLE COMPANY
[no value]
Mead CYCLE COMPANY
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0129.xml
advertisement
107
107
[no value]
[no value]
HAMMARLUND MFG. CO.
[no value]
HAMMARLUND MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0130.xml
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107
107
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PopularScience_19270401_0110_004_0131.xml
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108
108
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PopularScience_19270401_0110_004_0132.xml
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109
109
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PopularScience_19270401_0110_004_0133.xml
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110
110
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PopularScience_19270401_0110_004_0134.xml
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111
111
[no value]
[no value]
The Veeder Mfg. Co.
[no value]
The Veeder Mfg. Co.
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0135.xml
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111
111
[no value]
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PopularScience_19270401_0110_004_0136.xml
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111
111
[no value]
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EVINRUDE MOTOR COMPANY
[no value]
EVINRUDE MOTOR COMPANY
[no value]
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[no value]
PopularScience_19270401_0110_004_0137.xml
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111
111
[no value]
[no value]
CHISEL-EDGE-CLAW HAMMER COMPANY
[no value]
CHISEL-EDGE-CLAW HAMMER COMPANY
[no value]
[no value]
[no value]
PopularScience_19270401_0110_004_0138.xml
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112
112
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PopularScience_19270401_0110_004_0139.xml
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113
113
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PopularScience_19270401_0110_004_0140.xml
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114
114
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Standard Laboratories, Inc.
[no value]
Standard Laboratories, Inc.
[no value]
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PopularScience_19270401_0110_004_0141.xml
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114
114
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LOCKWOOD MOTOR COMPANY
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LOCKWOOD MOTOR COMPANY
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PopularScience_19270401_0110_004_0142.xml
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115
115
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ALLIED MERKE INSTITUTES, Inc.
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ALLIED MERKE INSTITUTES, Inc.
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PopularScience_19270401_0110_004_0143.xml
article
116
116,117
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How Robert Hubbard Is Getting Ahead in the World
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Every month hundreds of people tell us how they have used advertisements in POPULAR SCIENCE MONTHLY as stepping stones to success. This month Robert Hubbard wins the first prize for the best letter telling how success has been won through the use of opportunities offered by advertisers in POPULAR SCIENCE MONTHLY.
PopularScience_19270401_0110_004_0144.xml
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116
116
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PopularScience_19270401_0110_004_0145.xml
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117
117
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Advertisement: POPULAR SCIENCE
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POPULAR SCIENCE
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PopularScience_19270401_0110_004_0146.xml
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117
117
[no value]
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J. A. STRANSKY MFG. CO.
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J. A. STRANSKY MFG. CO.
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PopularScience_19270401_0110_004_0147.xml
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118
118,120,122,123,124
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Quick Action Advertising
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PopularScience_19270401_0110_004_0148.xml
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119
119
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RALSTON UNIVERSITY PRESS
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RALSTON UNIVERSITY PRESS
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PopularScience_19270401_0110_004_0149.xml
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121
121
[no value]
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American School
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American School
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[no value]
[no value]
PopularScience_19270401_0110_004_0150.xml
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123
123
[no value]
[no value]
Technical College
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Technical College
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[no value]
PopularScience_19270401_0110_004_0151.xml
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123
123
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Advertisement
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PopularScience_19270401_0110_004_0152.xml
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123
123
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FRANKLIN INSTITUTE
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FRANKLIN INSTITUTE
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PopularScience_19270401_0110_004_0153.xml
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124
124
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PopularScience_19270401_0110_004_0154.xml
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125
125
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PopularScience_19270401_0110_004_0155.xml
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126
126
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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PopularScience_19270401_0110_004_0156.xml
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126
126
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THE W. L. EVANS SCHOOL
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THE W. L. EVANS SCHOOL
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PopularScience_19270401_0110_004_0157.xml
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127
127
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PopularScience_19270401_0110_004_0158.xml
article
127
127
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New Publications
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Romance in Science, by Prof. Bessie I. Miller. The Stratford Company. There is a Fourth Dimension in Mathematics, but that does not prove there is a Fourth Dimension in Spiritualism, and Einstein does not claim it does, this writer says. Neither does he claim that there is an actual Fourth Dimension in the physical sense that can be felt and smelt and seen.
PopularScience_19270401_0110_004_0159.xml
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128
128
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NATIONAL RADIO INSTITUTE
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NATIONAL RADIO INSTITUTE
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PopularScience_19270401_0110_004_0160.xml
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129
129
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CLARENCE A. O'BRIEN
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CLARENCE A. O'BRIEN
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PopularScience_19270401_0110_004_0161.xml
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130
130
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PopularScience_19270401_0110_004_0162.xml
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131
131
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VICTOR J. EVANS & CO.
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VICTOR J. EVANS & CO.
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PopularScience_19270401_0110_004_0163.xml
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132
132
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PopularScience_19270401_0110_004_0164.xml
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PopularScience_19270401_0110_004_0167.xml
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PopularScience_19270401_0110_004_0168.xml
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PopularScience_19270401_0110_004_0169.xml
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137
137
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HARRISON SHIRT CO.
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HARRISON SHIRT CO.
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PopularScience_19270401_0110_004_0170.xml
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137
137
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A. O. Leonard, Inc.
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A. O. Leonard, Inc.
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PopularScience_19270401_0110_004_0171.xml
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137
137
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PERFECT VOICE INSTITUTE
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PERFECT VOICE INSTITUTE
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PopularScience_19270401_0110_004_0172.xml
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138
138
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American School
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American School
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PopularScience_19270401_0110_004_0173.xml
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139
139
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PopularScience_19270401_0110_004_0174.xml
article
140
140
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Life Chemically Imitated
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MAN’S nearest approach to artificial creation of life has been reported by a French chemist, M. Herrera, of Paris. He created chemical droplets which behaved outwardly exactly like the single-celled amoeba, lowest of animal forms. They moved from place to place, formed vacuoles within themselves, and divided, for all the world like unicellular, living creatures.
PopularScience_19270401_0110_004_0175.xml
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Advertisement
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PopularScience_19270401_0110_004_0176.xml
article
141
141
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Answers to the Sam Loyd Tests on Page 64
The Matrimonial Daisy Game
Johnny’s Multiplication Example
The Ant’s Homily
Fencing the Tract of Land
Snubby McCann’s Baseball Nine
The Clock Puzzle
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The second player should win, and the secret is to keep the petals divided into two similar groups for your opponent to act upon. Then, as he removes the last petal of his group, you do the same to yours, leaving him stumped. In reply to your opponent’s removal of petal No. 1 for his opening play, you draw 7 and 8, leaving the petals in exact halves.
PopularScience_19270401_0110_004_0177.xml
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141
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PopularScience_19270401_0110_004_0178.xml
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PopularScience_19270401_0110_004_0179.xml
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PopularScience_19270401_0110_004_0180.xml
tableOfContents
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CONTENTS
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PopularScience_19270401_0110_004_0181.xml
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144
144
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UNITED STATES GYPSUM COMPANY: SHEETROCK
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UNITED STATES GYPSUM COMPANY
SHEETROCK
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PopularScience_19270401_0110_004_0182.xml
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145
145
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MILLERS FALLS COMPANY: Portable Electric Drill No. 414
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MILLERS FALLS COMPANY
Portable Electric Drill No. 414
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PopularScience_19270401_0110_004_0183.xml
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146
146,147,148
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Advertisement: LUCKY STRIKE
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LUCKY STRIKE
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PopularScience_19270401_0110_004_0184.xml