Issue: 19410801

Friday, August 1, 1941
AUGUST, 1941
2
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139
Saturday, December 13, 2014

Articles
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POPULAR SCIENCE MONTHLY
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Columbia Broadcasting System
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Columbia Broadcasting System
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PopularScience_19410801_0139_002_0002.xml
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1
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General Electric Co.
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General Electric Co.
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PopularScience_19410801_0139_002_0003.xml
masthead
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POPULAR SCIENCE
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PopularScience_19410801_0139_002_0004.xml
tableOfContents
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2,4,6
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CONTENTS for AUGUST, 1941
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3
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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PopularScience_19410801_0139_002_0006.xml
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5
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ETHYL GASOLINE CORPORATION: ETHYL EMBLEM
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ETHYL GASOLINE CORPORATION
ETHYL EMBLEM
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PopularScience_19410801_0139_002_0007.xml
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6
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Champion SPARK PLUGS
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Champion SPARK PLUGS
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PopularScience_19410801_0139_002_0008.xml
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6
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CHAMPION SPARK PLUG CO.
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CHAMPION SPARK PLUG CO.
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PopularScience_19410801_0139_002_0009.xml
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7
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LASALLE EXTENSION UNIVERSITY
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LASALLE EXTENSION UNIVERSITY
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PopularScience_19410801_0139_002_0010.xml
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Advertisement
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PopularScience_19410801_0139_002_0011.xml
article
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Readers Say:
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Readers Say:
You'd Think He'd See Enough of Planes
Steam-Engine Model Saves a Subscriber
An Article in P.S.M. Suggested This Streamlined Land Cruiser
And Who Said Mathematics Was a Dry Subject?
Some People Collect Bugs Without Half Trying
He Wants to Know What to Do with Those Shirt Cardboards
That Radio Turns His Bed info a Magic Carpet
Apparently the Balloon "Got High" on Pay Day
Who'll Have Ersatz Chorus Girls When Real Ones Are Plentiful?
That's All Right, But Don't Try It on the Gas Tank
P. S. M. Helps Him Keep Up with Science and Invention
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SINCE joining the Royal Canadian Air Force I have looked forward to receiving each month’s copy of P.S.M., and am never disappointed with its contents. You are keeping up your fine standard. Reading the letters in Our Readers Say and laughing at the drawings, which are always quite apt, is a good beginning for the pleasure I get out of reading the pages that follow.
PopularScience_19410801_0139_002_0012.xml
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11
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THEO. AUDEL & CO.
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THEO. AUDEL & CO.
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PopularScience_19410801_0139_002_0013.xml
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12
12
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American Technical Society
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American Technical Society
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PopularScience_19410801_0139_002_0014.xml
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12
12
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PARKS AIR COLLEGE
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PARKS AIR COLLEGE
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PopularScience_19410801_0139_002_0015.xml
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12
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U. S. SCHOOL OF MUSIC
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U. S. SCHOOL OF MUSIC
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PopularScience_19410801_0139_002_0016.xml
article
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12
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Coming Next Month-
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CIVILIAN DEFENSE COUNCILS are being organized all over the country. What will be your rôle when your community organizes? Air-raid warden, spotter, first aid, emergency fireman, emergency policeman? David M. Stearns takes a typical town and, with Ralph Morse’s photographs, gives you a behind-the-scenes view of the civil defense program.
PopularScience_19410801_0139_002_0017.xml
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13
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Advertisements
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PopularScience_19410801_0139_002_0018.xml
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14
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Advertisements
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PopularScience_19410801_0139_002_0019.xml
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15
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Advertisements
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PopularScience_19410801_0139_002_0020.xml
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16
16
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American School
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American School
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PopularScience_19410801_0139_002_0021.xml
article
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16,18,20,22
With the Inventors
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With the Inventors
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BY PROVIDING a reservoir for water in the crown of a military helmet, Thomas B. Upchurch, Jr., of Raeford, N. C., accomplishes a double purpose. First, an emergency supply of water is assured the wearer. Second, the water chamber with its flexible bottom makes a comfortably resilient support for the headgear.
PopularScience_19410801_0139_002_0022.xml
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17
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CLARENCE A. O'BRIEN
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CLARENCE A. O'BRIEN
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PopularScience_19410801_0139_002_0023.xml
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18
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Advertisements
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PopularScience_19410801_0139_002_0024.xml
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19
19
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VICTOR J. EVANS & Co.
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VICTOR J. EVANS & Co.
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PopularScience_19410801_0139_002_0025.xml
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20
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Advertisements
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PopularScience_19410801_0139_002_0026.xml
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21
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McMORROW & BERMAN
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McMORROW & BERMAN
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PopularScience_19410801_0139_002_0027.xml
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22
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Advertisements
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PopularScience_19410801_0139_002_0028.xml
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Advertisements
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PopularScience_19410801_0139_002_0029.xml
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24,25,26,27,28,29,30
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POPULAR SCIENCE Classified OPPORTUNITIES
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PopularScience_19410801_0139_002_0030.xml
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PopularScience_19410801_0139_002_0031.xml
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Advertisement: PRINCE ALBERT
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PRINCE ALBERT
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PopularScience_19410801_0139_002_0032.xml
article
33
33,34,35
News
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Pan-American Highway Nears Completion
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WALTER HOLBROOK
THE PAN-AMERICAN highway is now passable most of the way from Laredo, Texas, to Buenos Aires and Rio de Janeiro, and the 18-year-old dream of a motor road from Fairbanks, Alaska, to the Straits of Magellan may actually come true by October 12, 1942, the 450th anniversary of Columbus’s discovery of America.
PopularScience_19410801_0139_002_0033.xml
article
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36,37
Facts and Ideas
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Frozen Motion
TEACHES LAWS OF SCIENCE
Multi flash Photos from Technology Review
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MULTIFLASH pictures that freeze successive steps of high-speed motion will be used this fall to demonstrate mechanical movements and teach fundamental laws of physics to first-year engineering students at the Massachusetts Institute of Technology, Cambridge, Mass.
PopularScience_19410801_0139_002_0034.xml
article
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38,39,40,41,42
News
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Mechanized Treasure House
NATIONAL GALLERY PROTECTS MASTERPIECES OF ART
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HENRY H. SAYLOR
THE CASUAL PASSER-BY will see the National Gallery of Art—Andrew Mellon's magnificent gift to the nation— merely as monumental architecture. It is really a complex and efficient machine. Behind that expanse of marble walls—longer, incidentally, than the Capitol itself—one will find not only one of the world’s greatest collections of paintings and sculpture, but the last word in our scientific knowledge of building.
PopularScience_19410801_0139_002_0035.xml
article
43
43
Facts and Ideas
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Movie Clipper Taxis on Studio Pool, but Never Takes Off
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PROVING that things are not always what they seem, these photographs show a “prop” imitation of a Boeing Clipper plane which was manufactured by Warner Brothers technicians for use in making studio shots for the motion picture “Affectionately Yours.”
PopularScience_19410801_0139_002_0036.xml
article
43
43
Inventions
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Supercharger Weighing 2½ Ounces Peps Up Gasoline-Driven Models
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TO HELP the model makers get the last ounces of power out of the miniature gasoline engines that drive their midget boats, planes, and cars, a supercharger has been developed that weighs only 2¼ ounces. It is claimed that the added power resulting from use of this unit more than offsets the extra weight.
PopularScience_19410801_0139_002_0037.xml
article
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44
Inventions
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Weed Boat Chops Up Water Hyacinths Choking Florida Canals
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MILLIONS of flat, air-filled leaves of the water hyacinth, choking Florida canals with an almost solid mass of vegetation, are being removed with a shallow-draft “weed boat” invented by R. T. Lingle and C. W. Nipson, of the Lake Worth Drainage District, in Palm Beach County, Fla.
PopularScience_19410801_0139_002_0038.xml
article
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44
Automobiles
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A Filling Station on Wheels
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A MIDGET service truck, placed on the market by a Springfield, Ohio, manufacturer, saves steps for mechanics at used-car lots. The truck can be pushed, on its two rubber-tired wheels, into position beside any car which needs servicing. If the tires of the parked auto are soft, air from a compressed-air tank on the truck will inflate them.
PopularScience_19410801_0139_002_0039.xml
article
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45
Facts and Ideas
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Invisible Rays in Blackout Plant Make Dials Glow
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GHOST LIGHTS shine in German power plants during air raids, but there is no stray gleam from the plant windows. To accomplish this, vital gauges, levers, switches, control wheels, stairs, ladders, and walkways within the plants are painted with chemicals which glow only when illuminated with the invisible rays from special lamps.
PopularScience_19410801_0139_002_0040.xml
article
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46
Facts and Ideas
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HE GROWS A POISON GARDEN
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MAKING POISON plants more poisonous is the hobby of Dr. William J. Bonisteel, professor of botany and pharmacognosy (the science of basic medical materials) at Fordham University. At his farm at Pine Plains, N. Y., in the garden of his Scarsdale home, and in a greenhouse at Fordham, he spends every moment available hybridizing and chemically treating an array of plants that would arouse the envy of a Borgia.
PopularScience_19410801_0139_002_0041.xml
article
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47,48,49
News
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Cameraman in White
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ANDREW R. BOONE
BILLY BURKE, a Texas cowboy turned photographer, has filmed more surgical operations than most persons outside the medical profession will ever see. During the last ten years he has made 500 full-color motion pictures of operations ranging from delicate brain surgery to work on muscles and tendons.
PopularScience_19410801_0139_002_0042.xml
article
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Facts and Ideas
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The Sun Is Used to Provide Hot Water in Florida and Hawaii
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SOLAR HEATERS are being installed in Government housing projects in Florida and Hawaii to provide hot water. The sun heats the water to 180 degrees in a few hours as it runs through a series of copper pipes built into shallow, glass-covered boxes on the roof.
PopularScience_19410801_0139_002_0043.xml
article
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Inventions
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Mimeo Drawing Board Is Instantly Adjustable
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AN ILLUMINATED drawing board for mimeograph work has been developed capable of instant adjustment to any angle required for easy and quick stencil illustration. The glass top is set in a single piece of molded plastic, which permits easy and precise control of the T square when it is used either vertically or horizontally.
PopularScience_19410801_0139_002_0044.xml
article
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51
Automobiles
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Portable Traffic Overpasses Can Be Set Up Where Needed
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LINTON HOPKINS, JR., state news editor of “The Atlanta Journal,” has designed a portable metal bridge to speed up traffic at busy street intersections. The bridge eliminates the need for red lights, and permits an uninterrupted stream of vehicles in every direction, thus emptying congested areas in much shorter time than is the rule now.
PopularScience_19410801_0139_002_0045.xml
article
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51
Facts and Ideas
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Dictaphones Save Time of Stock Checkers Taking Inventory
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BY ASSIGNING five men equipped with dictaphones to the job of inventorying its 350-odd grocery stores regularly, the Safeway Stores on the West Coast has given its store personnel 12 extra nights off a year. A checker from the central office covers two stores a night, speaking into a microphone hung around his neck, as he moves along between the rows of goods, calling out the location of each shelf and the quantity, container size and price of each item.
PopularScience_19410801_0139_002_0046.xml
article
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52,53,54
SCIENCE SOLVES ANOTHER RIDDLE
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Why a Snake flicks Its Tongue
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BARRETT McGURN
THE SNAKE'S flickering tongue, recent experiments have proved, is part of a super nose, very useful in finding food, in courtship, and even, in the case of the female, in caring for its eggs. Every schoolboy knows that despite its wicked look the tongue is not the snake’s fangs, that instead the poisonous varieties inject their venom from hollow teeth, similar to a doctor’s hypodermic needle.
PopularScience_19410801_0139_002_0047.xml
article
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55
Inventions
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New Tools
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LIGHT ON A REEL. Attached with brackets to a wall or ceiling, a combination lamp and cord reel supply light just where it is wanted. As much cord as desired may be drawn out, and the lamp hooked to a convenient support. Unhook the lamp, and a gentle tug starts the reel winding in the cord, as shown in the illustration at right.
PopularScience_19410801_0139_002_0048.xml
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Advertisement
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PopularScience_19410801_0139_002_0049.xml
article
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57,58,59,60,61,62,63,64,65
News
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Battle of the Billions
American Industry Mobilizes Machines, Materials, and Men for a Job as Big as Digging 40 Panama Canals in One Year
TOOLMAKERS’ JIGS SPEED PLANE PRODUCTION
MAKING PLANES IN JIG TIME
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RAY MILLHOLLAND
IT LOOKS like some outsider is continually forgetting that we Americans are a nation born with the smell of machine oil in our hair and that if we are crowded too hard we are liable to stop making electric refrigerators and pretty automobiles and devote all our attention to turning out the darnedest flock of airplanes, tanks, and battleships the world has ever seen.
PopularScience_19410801_0139_002_0050.xml
article
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66,67,68,69,70,71,72,73,204
News
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AMERICA ROLLS OUT The Warplanes
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C. B. ALLEN
MILITARY-AIRCRAFT production in the United States has really begun to go to town in the last few months. It still has a long way to go, if it is ever to reach the 50,000 to 80,000-airplanes-a-year output confidently predicted from time to time.
PopularScience_19410801_0139_002_0051.xml
article
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74,75,76,77,78,79,80
News
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Motorization and Mechanization
HELP THE ARMY MOVE FASTER AND HIT HARDER
MOTORIZED
MECHANIZED
USES OF THE TRACKLESS TANK
MAKES A GOOD GUN PLATFORM
STANDARDIZATION MAKES MAINTENANCE EASIER
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DAVID M. STEARNS
MODERN armies must have speed to win battles. They must be able to move quickly from one place to another, to fight on the run as well as in the trenches, and to maintain a fast-moving stream of supplies to front lines. To do all that, they need motor vehicles by the thousands.
PopularScience_19410801_0139_002_0052.xml
article
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81,82,83,84,85
News
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The Little Factory Joins Up
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EDWIN TEALE
Little factories in loft buildings, on side streets, in small towns—plants that make a thousand and one varied products—form the infantry of America’s army of defense-production. Individually small, they are collectively indispensable.
PopularScience_19410801_0139_002_0053.xml
article
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86,87,88,89,90,91
News
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NAVY'S TRIPLE THREAT - Fire Power, Speed, and Armor
NAVY FIRE POWER: A MIGHTY LANGUAGE
AUXILIARY SHIPS BACK UP THE FIGHTING FLEET
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ALDEN P. ARMAGNAC
REINFORCING the United States Navy at a time when they are extremely welcome, the two most formidable battleships in the world have just been placed in commission. Sister ships of 35,000 tons each, the mighty North Carolina and Washington excel anything else afloat in their combination of guns, speed, and armor —the three vital elements of a ship of the line.
PopularScience_19410801_0139_002_0054.xml
article
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92,93,94,95,216,217,218
News
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Army's Nerve System -
SPEEDS TEAMWORK OF FAST-MOVING FIGHTING MACHINES
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HICKMAN POWELL
THE heavy tanks and dive bombers hit the line, smash an opening. Through the gap rush the armored divisions, the light and medium tanks and armored cars, fanning out, a fast backfield running interference for the infantry. Fifty miles, 100 miles and more a day the mechanized columns speed over the vast grid map of battle.
PopularScience_19410801_0139_002_0055.xml
article
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96,97,98,99,211
News
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Assembly-Line Cities
Mass-Production Carpentry and Prefabrication Meet the Emergency of Housing America’s Defenders
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WALTER HOLBROOK
WHOLE CITIES have been put together the last few months with only a rubber mallet, screw driver, and wrench for tools, and plenty more are rolling off the assembly lines. Prefabrication was largely dream until France fell, and this country decided it wanted a lot of shooting irons and fixin’s right quick.
PopularScience_19410801_0139_002_0056.xml
article
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100,101,102,103,104,212,213,214,215
News
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Poison-gas defense is the army chemist's job
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LIEUT. COL. A. M. PRENTISS
EVERY nation in the world is prepared in greater or less degree to defend itself against gas, a weapon to which no belligerent found it advisable to resort in the first 18 months of the war. The United States aims to be in the ranks of the fully prepared, for gas is an arm which can be introduced into a conflict at short notice and under favorable conditions is highly effective against an unprepared foe.
PopularScience_19410801_0139_002_0057.xml
article
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105,106,107,220
News
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Chemurgy- a strong new weapon
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ROGER BURLINGAME
WHEN war threatens, a wise nation takes stock of its natural resources. It catalogs those raw materials of which it has an abundance, those it must import, those it must conserve, those it must do without. This last category brings up the question of substitutes.
PopularScience_19410801_0139_002_0058.xml
article
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108,109,110,111,112
News
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Motorizing the Medical Corps
KEEPS PACE WITH THE NEW ARMY
Prompt, sure help reaches the wounded man on the field
Front the front-line area he is taken to a clearing station
For emergency surgery he goes to a mobile surgical hospital
Here less serious cases are returned to duty
where trailer units form the operating rooms
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JOHN WATSON
TO THE same all-out degree that American industry is supplying the sinews, bones, and blood to the nation's fighting strength, it is lending its technique and talents to the mechanical development of our Army’s Medical Department which, under the urgency of modern warfare, has become a highly flexible and fast-moving branch of the military service.
PopularScience_19410801_0139_002_0059.xml
article
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113,114,115,116,117,118,119,120,121
AUTOS
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From Cook Stoves to Tanks
. . . They Roll from the Automobile Factories
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SCHUYLER VAN DUYNE
THE Detroit genius for industrial organization is sorting out the sudden chaotic avalanche of defense orders with its customary frantic and incredible orderliness. It is responding to the fabulous impetus of something like a billion and a half in armament orders assigned by the U. S. Government to the automobile industry.
PopularScience_19410801_0139_002_0060.xml
article
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122,123
Automobiles
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Auto Ideas
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ENGINE PUMPS OWN FUEL. Tapping the vacuum of a gasoline engine’s intake manifold through a convenient fitting or opening, a new fuel “pump” quickly fills the fuel tank of a car, tractor, or other vehicle. In use, the pump is placed in the opening of the tank, and the engine started.
PopularScience_19410801_0139_002_0061.xml
article
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124,125
Automobiles
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EIGHT HANDY IDEAS FOR THE MOTORIST
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1 COINS FOR TOLLS on highways, bridges, ferries, and tunnels are always at your finger tips in this special holder mounted on your dash. A heavy spring paper clip is attached to the dash with a screw through one of the handles. Coins pinched between its jaws are easily removed as needed.
PopularScience_19410801_0139_002_0062.xml
article
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126,127,128,202
Automobiles
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YOU can’t be too careful!
Two jobs in the same day prove Gus Wilson's contention that most automotive grief is caused by carelessness—the driver's or that of some bum mechanic
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MARTIN BUNN
JOE CLARK stepped out of his office into the shop of the Model Garage just in time to be almost run down by a snappy convertible coupe being driven out by a decidedly peevish-looking young man. “Hey—watch it!” he yelled, but by the time he got the words out the car was gone.
PopularScience_19410801_0139_002_0063.xml
article
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129,130,131,132,133,134,135
HOME and WORKSHOP
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Outdoor Water Gardens
HOW TO BUILD POOLS FOR AQUATIC PLANTS AND FISH
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CARL T. SIGMAN
WILLIAM J. WARD
MOST gardens should be planned about a focal point of interest, and perhaps no more satisfying central feature could be chosen than a well-built and tastefully planted pool. A grassy bank or a rocky landscaped ledge beside mirroring water may provide a delightful contrast to conventional flowers and shrubbery.
PopularScience_19410801_0139_002_0064.xml
article
136
136,137
Home Building
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IDEAS for HOME OWNERS
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SHELF AND LINING PAPER having a plastic coating bonded to its surface is now available in colors, both plain and with patterns. The molded coating is greaseproof and waterproof, and does not deteriorate even after repeated wiping with damp cloths.
PopularScience_19410801_0139_002_0065.xml
article
138
138,139
[no value]
[no value]
KEEPING THE HOME SHIPSHAPE
[no value]
[no value]
[no value]
[no value]
BOTH PRIVACY AND VENTILATION are assured by screening a doorway with a roller shade hung as above. When closed, it takes up no room. Brace the lower bracket as shown. Screw eyes set in the shade stick slip over hooks in the opposite jamb SILVERWARE having a chased design is often hard to clean thoroughly with an ordinary cloth pad.
PopularScience_19410801_0139_002_0066.xml
article
140
140,141,142,143,144,145
Home and Workshop
[no value]
New Walls tor Old
EASY-TO-FOLLOW DIRECTIONS FOR REDECORATING WITH WALL PAPER
PART I
[no value]
[no value]
BENJAMIN NIELSEN
AT THIS time of year, you can't help noticing dingy wall papers. They seem to cry out for some one to do something about them. Perhaps you have already said to yourself, “I wish I knew just how to go about hanging wall paper!” But you may have given the idea because you think that it is difficult to learn and that you would need various special tools or exceptional skill in order do presentable work.
PopularScience_19410801_0139_002_0067.xml
article
146
146
$1000 CONTEST
[no value]
Judges Face Huge Task in House-Planning Contest
[no value]
[no value]
[no value]
[no value]
IF WE had had any doubts that our readers were thinking of building new homes, those doubts would have been swept out of the office by the 3,307 entries received in our $1,000 house-planning contest. As we go to press with this issue, the judges are busy with their painstaking task of selecting the thirty prize winners.
PopularScience_19410801_0139_002_0068.xml
article
147
147
Woodworking
[no value]
Fold-Away End Table
[no value]
[no value]
[no value]
JOSEPH ARONSON
END TABLES are sometimes too much with us in the average room. We can, however, enjoy their convenience or dispense with them at will if they are of the folding type shown here. When the gate is open, it locks into a homemade wooden catch. The hinges are recessed into the underside of the top.
PopularScience_19410801_0139_002_0069.xml
article
148
148,149
Home and Workshop
[no value]
White-Pine Buffet
COPIED FROM A PENNSYLVANIA WATER BENCH
[no value]
[no value]
JOSEPH ARONSON
AMONG the Pennsylvania Dutch one frequently finds a piece of furniture called a Wasserhulch by those industrious people. The design is characteristically honest and directly suited to its purpose, which seems chiefly to have been to hold pans of water for the farmer’s ablutions before meals.
PopularScience_19410801_0139_002_0070.xml
article
150
150,151,152,153
Home and Workshop
[no value]
HOW TO SET UP AND ADJUST A Circular Saw
[no value]
[no value]
[no value]
EDWIN M. LOVE
THE THRILL that the home shop mechanic experiences when the crates containing his new circular saw and motor are placed on his shop floor is second only to that of trying the saw out for the first time. Before the machine can be used, however, it must be unpacked and mounted.
PopularScience_19410801_0139_002_0071.xml
article
152
152
Shop Data File
[no value]
CUTTING A TENON BY HAND
[no value]
[no value]
[no value]
[no value]
1. Square shoulder lines around the piece, pressing the try-square against the face side and edge. Use a sharply pointed hard pencil, or, better still, the point of a knife. 2. Gauge the thickness of the tenon on edges and end, working from the face side; also the width, working from the face edge.
PopularScience_19410801_0139_002_0072.xml
article
154
154
Woodworking
[no value]
What's Wrong IN THESE SKETCHES?
[no value]
[no value]
[no value]
[no value]
SEE if you can catch the errors that have been purposely made in the five drawings at left. The first illustrates a piece of work being calipered to find the inside diameter. The second shows an ordinary roundhead screw. In the third, what is the missing dimension?
PopularScience_19410801_0139_002_0073.xml
article
154
154
Woodworking
[no value]
Staple Bent from Heavy Rod Aids in Laying Warped Tongue-and-Groove Flooring
[no value]
[no value]
[no value]
R. S. MACNEILL
WHEN the proper facilities are not at hand for laying tongue-and-groove flooring, some sort of wedging method is frequently used to set the pieces up tight. These wedges can be held with a double-pointed iron rod as shown. If a few holes in the joists or rough flooring are not objected to, the most obstinate piece of flooring can be forced into place.
PopularScience_19410801_0139_002_0074.xml
article
155
155
Outdoors
[no value]
Length of Hose Keeps Reins from Under Wagon Tongue
[no value]
[no value]
[no value]
LOWELL MASDEN
INSIDE reins on team harness that persist in getting under the wagon tongue can be kept in place by an 18" length of old garden hose fastened to the loop on the end of the tongue. A couple of holes punched in one end of the hose and a foot of wire do the trick.
PopularScience_19410801_0139_002_0075.xml
article
155
155
Outdoors
[no value]
Mulching Collars for Trees
[no value]
[no value]
[no value]
S. Y. CALDWELL
DISCARDED asphalt shingles or 15" to 18" square pieces cut from old composition roofing make mulching collars for newly planted trees, holding moisture about the roots. They should be removed in from six weeks to three months.
PopularScience_19410801_0139_002_0076.xml
article
155
155
Outdoors
[no value]
Scraper of Channel Iron Clears Woodland Paths and Roads
[no value]
[no value]
[no value]
[no value]
BUILDING woodland paths and roads is made easier with a length of channel iron bolted at an angle on the bottom of a tractor-drawn stone boat to tear out brush and roots. Shim up the iron, if small, to make it cut deeper. In the same operation, clumps of sod can be broken up and the path leveled by dragging a harrow behind.
PopularScience_19410801_0139_002_0077.xml
article
156
156
Outdoors
[no value]
Laminated Construction Simplifies Building of Canoe Ends
[no value]
[no value]
[no value]
R. H. JENKINS
ONE OF the major problems in building a canoe is the shaping of the stem and stern. Although this is usually done by steaming, an easier solution is to use laminated construction. Prepare a wooden jig with the curved edges 2½" apart, or whatever the thickness of the finished piece is to be.
PopularScience_19410801_0139_002_0078.xml
article
156
156
Outdoors
[no value]
A Mud Anchor for Small Boats
[no value]
[no value]
[no value]
[no value]
AS A SUBSTITUTE for the rocks and iron weights which many fishermen use for anchors, an effective mushroom anchor, especially for mud bottoms, can be made from an automobile brake drum picked up in a junk yard, and a 12" length of ¾" pipe. A pipe flange of the same size is bolted to the center of the drum, and the pipe screwed tightly in place so that the open side of the drum faces upwards.
PopularScience_19410801_0139_002_0079.xml
article
156
156
Outdoors
[no value]
Garden Dibble Used as Point of Homemade Boat Hook
[no value]
[no value]
[no value]
L. B. R.
A BOATMAN in immediate need of a boat hook made one from materials on hand. The pointed shank of a garden dibble and a coat hook from which the shorter arm had been sawed off were bolted to a strong pole, as shown below.
PopularScience_19410801_0139_002_0080.xml
article
157
157,158,159
Outdoors
[no value]
Self-Tacking Vane Gear
FOR MODEL SAILING YACHTS
[no value]
[no value]
JOHN BLACK
NOTHING in a century of model-yacht racing has added more thrills to the sport than the vane steering gear, which is today to model yachting what the jib-headed mainsail is to full-size yachts and the front steerer is to ice boats. Its advantages are: 1. The mainsail may be sheeted very close.
PopularScience_19410801_0139_002_0081.xml
article
160
160,161
New Appliances for the Household
[no value]
New Appliances for the Household
[no value]
[no value]
[no value]
[no value]
THIS WASHING MACHINE has a heavy-duty wringer, the drain flume of which automatically shifts when the rolls are reversed. If the roller pressure is released, it can be instantly reset TURNING A KNOB or this plastic dispenser squeezes exactly the desired amount of tooth paste or shaving cream out of the tube.
PopularScience_19410801_0139_002_0082.xml
article
162
162
Craftwork
[no value]
TROJAN-HORSE CIGARETTE BOX
[no value]
[no value]
[no value]
JUAN OLIVER
SMARTLY modern treatment sets off this box, which holds twenty cigarettes and matches, or three brands of cigarettes. Its contents are visible through a transparent plastic cover, and the whimsical horse of ruby plastic is both ornament and handle.
PopularScience_19410801_0139_002_0083.xml
article
163
163
Craftwork
[no value]
Bedtime Willy
BRIGHTENS THE PARTY TABLE
[no value]
[no value]
[no value]
THIS little figure will add a droll note to the festive table. A number of such dolls might be used to hold up place cards, or, if pairs are stood back to back, menus, napkins, or paper favors can be put between them. They can be cut out with a hand coping saw, but if a band or jig saw is available, several can be made in one evening.
PopularScience_19410801_0139_002_0084.xml
article
163
163
The Handy Man
[no value]
Paper Baking Cups Hold Varnish and Paint for Touch-up Jobs
[no value]
[no value]
[no value]
HAROLD ROLSETH
PAPER cups of the kind used for baking drop cakes are good receptacles for paints or varnishes required for touch-up work and other small jobs. Used once, they can be thrown away.
PopularScience_19410801_0139_002_0085.xml
article
163
163
New Shop Ideas
[no value]
Red-Hot Nail Relights Blowtorch
[no value]
[no value]
[no value]
ROY HANNING
IF A BLOWTORCH tends to go out because of a poor grade of gasoline or a strong wind, simply insert a small, large-headed nail or a short piece of wire through the holes in the end of the combustion chamber. The wire or nail becomes red-hot, and if the flame goes out the torch is immediately relighted.
PopularScience_19410801_0139_002_0086.xml
article
164
164
Craftwork
[no value]
Trained-Seal Toy Bank
[no value]
[no value]
[no value]
KENNETH MURRAY
CHILDREN enjoy saving pennies in this novel bank. When the lever is pressed, the seal flips a coin from its nose into a wooden cup, through which the coin falls into the hollow base. Some skill is required to push the lever just hard enough. Dimensions may be taken directly from the drawings below, which are half size.
PopularScience_19410801_0139_002_0087.xml
article
165
165
Craftwork
[no value]
Wood and Copper Pipe Rack
[no value]
[no value]
[no value]
[no value]
MADE of cherry and sheet copper, this pipe rack is one that will delight any pipe collector. It is designed to hold seventeen pipes, and in addition a long-stemmed church warden pipe can be slipped between the copper troughs from either end.
PopularScience_19410801_0139_002_0088.xml
article
166
166,167
Craftwork
[no value]
WORKING TIME: ONE EVENING
FOUR CRAFTWORK PROJECTS DESIGNED FOR POPULAR SCIENCE
[no value]
[no value]
ERNEST R. DEWALT
ONE or more of these useful articles will find a welcome in almost any home. Their construction involves no difficulty for even the beginner, and if the materials are on hand, any of the projects shown can be made in an evening. LANTERN LAMP.
PopularScience_19410801_0139_002_0089.xml
article
168
168,169
Craftwork
[no value]
MAKE-UP BOX TURNED ON LATHE
[no value]
[no value]
[no value]
[no value]
SIMPLICITY, beauty, and utility are combined in this modern make-up box. Three disks 8⅜" in diameter are cut from ¾" walnut or other hardwood. Two of these disks are glued together for the bottom part of the box; then these are glued to a piece of waste stock, mounted on the faceplate of the lathe, and turned to a diameter of 8¼".
PopularScience_19410801_0139_002_0090.xml
article
170
170,171,172,173
Home and Workshop
[no value]
Precision Tool-Post Grinder
FOR THE SMALL MACHINE SHOP
[no value]
[no value]
C. W. WOODSON
THIS attachment, mounted on the cross slide of the lathe, brings precision grinding within the scope of the small machine shop. It is designed to use both external and internal wheels with accuracy (Fig. 1), and will handle a wide variety of work on materials ranging from soft iron to hardened tool steels and glass-hard nonmetals.
PopularScience_19410801_0139_002_0091.xml
article
174
174
New Shop Ideas
[no value]
Engine Magneto Mounted on Bench Lights Gas Welding Torch
[no value]
[no value]
[no value]
WALT LOVELL
AN OLD magneto mounted either as shown or under the workbench can be used for lighting a gas torch. In this instance a magneto from a single-cylinder motorcycle was used. The trip arm must be set so that the magneto points break at about the half-way point on the down stroke, causing spark at the spark-plug electrodes.
PopularScience_19410801_0139_002_0092.xml
article
174
174
Miscellaneous
[no value]
Heating Pad Polishes Wax
[no value]
[no value]
[no value]
EUGENE MORRISON
IN ONE showroom where much furniture has to be wax polished, time and labor is saved by using an electric heating pad covered with flannel. A thin coat of paste wax is applied and allowed to dry. The pad is set for medium heat and drawn slowly over the waxed surface.
PopularScience_19410801_0139_002_0093.xml
article
174
174
[no value]
[no value]
Antislip Surface for Ruler
[no value]
[no value]
[no value]
E. P.
FRICTION tape applied to the underside of a ruler will prevent it from slipping when it is used on a smooth surface.
PopularScience_19410801_0139_002_0094.xml
article
174
174
Shop Data File
[no value]
PLAIN MANDRELS
[no value]
[no value]
[no value]
[no value]
Mandrels are used to hold work that has been bored and reamed and that is to be further machined between centers in the lathe. The mandrel must be driven firmly into the hole so that the work will not slip under heavy cuts. For this reason mandrels are slightly tapered, one end being just under size, the other from 0.002" to 0.003" over size, depending on the length of the mandrel.
PopularScience_19410801_0139_002_0095.xml
article
175
175
New Shop Ideas
[no value]
Shop Coats and Overalls Kept in Empty Round Oil Cans
[no value]
[no value]
[no value]
LEO M. KNASKY
MECHANICS’ shop coats or overalls and the seat covers used in auto service stations can be stored neatly in empty 2-gal. round oil cans, which are ordinarily thrown out. Cut one end of the can evenly very close to the rim and hammer the sharp edge smooth.
PopularScience_19410801_0139_002_0096.xml
article
175
175
New Shop Ideas
[no value]
Setting a Combination Square with Vernier Accuracy
[no value]
[no value]
[no value]
RAYMONDLEVY
THE BLADE of a combination square may be set accurately within a few thousandths of an inch with the help of a steel scale, as shown. Place the scale alongside the blade with its end against the head of the square. Then adjust the blade of the square by tapping it lightly with a piece of wood until its own graduations, at the desired setting, coincide exactly with the graduations on the scale.
PopularScience_19410801_0139_002_0097.xml
article
175
175
New Shop Ideas
[no value]
Punch Marks Made Easier to Read by Using Carbon Paper
[no value]
[no value]
[no value]
T. G. S.
LETTERS and figures stamped on wood and other materials with steel punches are often hard to read. They will be more prominent if carbon paper or typewriter ribbon is put between the surface and the punch.
PopularScience_19410801_0139_002_0098.xml
article
175
175
Shop Data File
[no value]
EXPANDING AND SPECIAL MANDRELS
[no value]
[no value]
[no value]
[no value]
[LATHE WORK-7 6] An expanding mandrel derives its holding power from the expansion of a loose split ring that fits into the work. The mandrel itself has a taper of ½" to the foot. The ring or sleeve has the same internal taper and expands as the mandrel is driven into it, thus gripping the work accurately and securely.
PopularScience_19410801_0139_002_0099.xml
article
176
176,177,178,179
Home and Workshop
[no value]
ELECTRIC ENGRAVING TOOL
[no value]
[no value]
[no value]
HAROLD P. STRAND
ONE of the handiest small tools for home workshop use is the electric engraving pencil illustrated in Fig. 1. It is easily built and costs very little. It will engrave name plates, initials, and designs and do fancy tooling on such materials as brass, copper, and plastics.
PopularScience_19410801_0139_002_0100.xml
article
178
178
Shop Data File
[no value]
ELECTROPLATING, PART 4
[no value]
[no value]
[no value]
[no value]
Only direct current can be used for electroplating. Ordinary No. 6 dry cells are suitable for plating small pieces of jewelry. For larger work use a storage battery, an inexpensive battery charger, or a small motor-generator unit. A very practical motor-generator outfit can be built from an old ¼-h.p. washing-machine motor and an automobile generator.
PopularScience_19410801_0139_002_0101.xml
article
180
180
New Shop Ideas
[no value]
Disks Cut on Jig Saw with Aid of Adjustable Pivot Point
[no value]
[no value]
[no value]
F. H.
SCROLL saws like the one illustrated can be adapted to cut disks by means of the jig shown. This is a piece of ½" diameter brass, iron, or steel rod 5¼" long, threaded at one end 7/16"—14. Tap the center connection of a ⅛" pipe tee to fit the threaded rod and screw the two pieces together.
PopularScience_19410801_0139_002_0102.xml
article
180
180
Shop Data File
[no value]
HOLING THROUGH CONCRETE BLOCK
[no value]
[no value]
[no value]
[no value]
Straight, clean-cut holes can readily be made in concrete-block walls for the installation of water pipes and wiring conduits if the holes are spotted so that the drill will pass through the center of the cores (hollows) in the blocks.
PopularScience_19410801_0139_002_0103.xml
article
181
181
The Handy Man
[no value]
Base of Old Porch Pillar Repaired in Order to Prevent Rotting
[no value]
[no value]
[no value]
J. M.
IF A PORCH pillar that has become rotten at the base is repaired in the manner shown here, the new base will be protected from rain water and will resist rotting better than did the original. Saw off the rotted end at a height equal to that of the base molding.
PopularScience_19410801_0139_002_0104.xml
article
181
181
The Handy Man
[no value]
Old Water-Color Brush Serves as Handle of Stencil Knife
[no value]
[no value]
[no value]
ROBERT BLICKENDERFER
A FRISKET or stencil knife that has the same “feel” as a brush in an artist’s hands can be improvised from a safety razor blade and a discarded water-color brush. Burn out the bristles, fill the hollow in the ferrule with warm sealing wax, and flatten by squeezing gently.
PopularScience_19410801_0139_002_0105.xml
article
181
181
The Handy Man
[no value]
Adding New or Special Marks to a Plain Rubber Stamp
[no value]
[no value]
[no value]
CLIFFORD LEESTMA
SMALL figures, ornaments, symbols and the like can be added to rubber stamps by cementing on ordinary tire-patching rubber cut to shape with embroidery scissors. The illustration below shows how decorative dots, made with a leather punch, were added to improve the appearance of a stamp impression.
PopularScience_19410801_0139_002_0106.xml
article
182
182,183
Miscellaneous
[no value]
Simple Home Experiments Show Why the Weather Behaves the Way It Does
[no value]
[no value]
[no value]
[no value]
WHEN “highs” and “lows” march across the country, that’s weather, to the professional forecaster. But to the average man, weather is a matter of fresh or wilted collars; a beautiful summer day, or a downpour that drenches his clothes; a good time to go fishing, or to stay home.
PopularScience_19410801_0139_002_0107.xml
article
184
184,185
Radio
[no value]
Radio Ideas
[no value]
[no value]
[no value]
[no value]
SIGNALS FOR PRACTICE in transmitting and receiving code messages can be obtained from this six-tube communications receiver by merely connecting a telegraph key in series with the headphones. When used for this purpose, the output of the set is a heterodyne whistle which is broken up by the key into a good imitation of the sound of regular radio code transmission.
PopularScience_19410801_0139_002_0108.xml
article
186
186,187,188
Home and Workshop
[no value]
LIGHT-BEAM TRANSMITTER
LIST OF PARTS FOR THE LIGHT-BEAM SET
[no value]
[no value]
ARTHUR C. MILLER
CODE MESSAGES that can be detected only with a specially built receiver may be sent with this light-beam transmitter. With a 3or 4-cell flash light, preferably of the type with which the light rays can be focused into a spot, messages can be sent up to 200 feet.
PopularScience_19410801_0139_002_0109.xml
article
189
189
Radio
[no value]
MIDGET RADIO HAS 400-MILE RANGE
[no value]
[no value]
[no value]
[no value]
SMALL enough to be carried in a knapsack on hiking trips, this midget one-tube broadcast set will receive radio signals over distances up to 400 miles at night. It uses one of the new small-size RF pentode tubes as a regenerative detector, and all parts are standard.
PopularScience_19410801_0139_002_0110.xml
article
190
190,191,192,193
PHOTOGRAPHY
[no value]
Better Focus in Movie Making
[no value]
[no value]
[no value]
A. L. GILKS
HASTE and carelessness in focusing probably spoil more film footage than any other single error in taking home movies. Nor is this mistake restricted to amateurs. Not long ago a professional cinematographer crossed the continent to shoot a single scene, only to find when he returned and developed the film that it was out of focus.
PopularScience_19410801_0139_002_0111.xml
article
194
194,195
Photography
[no value]
Flash Gun
BUILT WITH BULB EJECTOR
[no value]
[no value]
CHARLES BROWNOLD
HERE is an easily made flash gun designed for use on a camera having a built-in synchronizer or in conjunction with a commercial synchronizer. Its features are balanced weight, compactness when taken apart, an adjustable reflector socket, and an ejector for hot bulbs.
PopularScience_19410801_0139_002_0112.xml
article
195
195
Photography
[no value]
Support Steadies Binoculars for Taking Telephoto Shot
[no value]
[no value]
[no value]
ROBERT SCOTT
MOST amateurs know that telephoto shots can be taken through a small telescope or one leg of a pair of binoculars. The difficulty lies in mounting such a cumbersome makeshift on the camera. A simple way is to place under the camera a thin board, with a hole for the tripod screw, and bind the telescope on with strong rubber bands.
PopularScience_19410801_0139_002_0113.xml
article
196
196,197
Photography
[no value]
FOR CAMERA USERS
[no value]
[no value]
[no value]
[no value]
HORSESHOE LAMP. To control modeling, key lighting, and balance from a single source, Tony Gaudio, a Hollywood, Calif., camera-man, has fitted his camera with an inverted horseshoe-type arrangement of lights. This is mounted above the lens, and the top and sides house twelve lighting units, each containing one 100-watt lamp.
PopularScience_19410801_0139_002_0114.xml
article
198
198,199,200
Home and Workshop
[no value]
PHOTOS THROUGH YOUR MICROSCOPE
[no value]
[no value]
[no value]
MORTON C. WALLING
PHOTOGRAPHS made through micro-scopes have led to revolutionary discoveries in all branches of science and engineering, and have trapped many criminals. All you need to enter this important field of picture taking—or photomicrography, to use its technical name—is a microscope and a camera, preferably one which has no lens.
PopularScience_19410801_0139_002_0115.xml
advertisement
201
201
[no value]
[no value]
Advertisements
[no value]
KODACHROME FILM
KODAK 35
KODACHROME FILM
KODAK BANTAM
[no value]
[no value]
PopularScience_19410801_0139_002_0116.xml
advertisement
202
202
[no value]
[no value]
HASTINGS MFG. COMPANY: STEEL-VENT PISTON RINGS
[no value]
HASTINGS MFG. COMPANY
STEEL-VENT PISTON RINGS
[no value]
[no value]
PopularScience_19410801_0139_002_0117.xml
advertisement
203
203
[no value]
[no value]
Delco-Remy
[no value]
Delco-Remy
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0118.xml
advertisement
204
204
[no value]
[no value]
Nicholson File Co.
[no value]
Nicholson File Co.
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0119.xml
advertisement
205
205
[no value]
[no value]
DE WALT PRODUCTION CORPORATION
[no value]
DE WALT PRODUCTION CORPORATION
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0120.xml
advertisement
206
206
[no value]
[no value]
SMOOTH-ON MFG. CO.: Smooth-On No. 1
[no value]
SMOOTH-ON MFG. CO.
Smooth-On No. 1
[no value]
[no value]
PopularScience_19410801_0139_002_0121.xml
article
206
206
Woodworking
[no value]
Special Craftwork Kits for Vacation Days
[no value]
[no value]
[no value]
[no value]
YOU don’t need a workshop full of tools, but only our whittling kit No. 7 ($1.50), to carve two 5½" high figures of “Skipper Sam’l.” The kit and a finished carving are shown above. Two sawed-out wooden blocks, paints, a special whittling knife, and full instructions are included.
PopularScience_19410801_0139_002_0122.xml
advertisement
207
207
[no value]
[no value]
BELL & HOWELL COMPANY: FILMO 8
[no value]
BELL & HOWELL COMPANY
FILMO 8
[no value]
[no value]
PopularScience_19410801_0139_002_0123.xml
article
207
207
[no value]
[no value]
Blazing Fluid Softens Putty So It Is Easily Removed
[no value]
[no value]
[no value]
R. O. L.
To REMOVE hard putty encountered when reglazing sash, pour a small amount of any inflammable fluid, such as turpentine substitute, wood alcohol, or gasoline, over the putty and ignite it. The fluid will burn out rapidly and leave the putty soft enough to be removed easily with a chisel.
PopularScience_19410801_0139_002_0124.xml
article
207
207
[no value]
[no value]
Troweling a Cement Coating Right Up to a Doorway
[no value]
[no value]
[no value]
J. MODROCH
WHERE a facing or veneer of concrete is applied directly over a concrete-block building, the doorway can be given a modern appearance by running the coat clear to the actual door opening, as illustrated. Metal lath can be used around the door frame.
PopularScience_19410801_0139_002_0125.xml
article
208
208,209
Woodworking
[no value]
Blueprints for Building Roomy Sport Boat
[no value]
[no value]
[no value]
[no value]
FROM the photo above it can be seen that Bill Sharpe, of Buffalo, N. Y., who built this shipshape runabout from POPULAR SCIENCE plans, is ready to make the most of the boating season. Months of vacation pleasure can be yours also if you construct this sturdy, versatile craft.
PopularScience_19410801_0139_002_0126.xml
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208
208
[no value]
[no value]
MOBIL UPPERLUBE: MOBIL HANDY OIL
[no value]
MOBIL UPPERLUBE
MOBIL HANDY OIL
[no value]
[no value]
PopularScience_19410801_0139_002_0127.xml
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209
209
[no value]
[no value]
UNIVERSAL CAMERA CORP.: Corsair II
[no value]
UNIVERSAL CAMERA CORP.
Corsair II
[no value]
[no value]
PopularScience_19410801_0139_002_0128.xml
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210
210
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0129.xml
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211
211
[no value]
[no value]
MASONITE CORPORATION: Masonite Tempered Presdwood
[no value]
MASONITE CORPORATION
Masonite Tempered Presdwood
[no value]
[no value]
PopularScience_19410801_0139_002_0130.xml
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212
212
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0131.xml
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213
213
[no value]
[no value]
J. Stevens Arms Company: Springfield Brand No. 94
[no value]
J. Stevens Arms Company
Springfield Brand No. 94
[no value]
[no value]
PopularScience_19410801_0139_002_0132.xml
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214
214
[no value]
[no value]
ATLAS PRESS CO.: atlas DRILL PRESSES
[no value]
ATLAS PRESS CO.
atlas DRILL PRESSES
[no value]
[no value]
PopularScience_19410801_0139_002_0133.xml
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214
214
[no value]
[no value]
JAMES BLISS & CO., INC.
[no value]
JAMES BLISS & CO., INC.
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0134.xml
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214
214
[no value]
[no value]
HULL MANUFACTURING CO.: HULL STREAMLINE AUTO COMPASS
[no value]
HULL MANUFACTURING CO.
HULL STREAMLINE AUTO COMPASS
[no value]
[no value]
PopularScience_19410801_0139_002_0135.xml
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214
214
[no value]
[no value]
KUMFY PRODUCTS INC.: AMAZING NEW ELECTRIC ARC WELDER
[no value]
KUMFY PRODUCTS INC.
AMAZING NEW ELECTRIC ARC WELDER
[no value]
[no value]
PopularScience_19410801_0139_002_0136.xml
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215
215
[no value]
[no value]
Lafayette Radio
[no value]
Lafayette Radio
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0137.xml
advertisement
216
216
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0138.xml
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217
217
[no value]
[no value]
The Hygienic Products Co.: SANI-FLUSH
[no value]
The Hygienic Products Co.
SANI-FLUSH
[no value]
[no value]
PopularScience_19410801_0139_002_0139.xml
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217
217
[no value]
[no value]
KAYAK BOAT CO.
[no value]
KAYAK BOAT CO.
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0140.xml
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218
218
[no value]
[no value]
Lafayette Camera: CARRYALL CASE
[no value]
Lafayette Camera
CARRYALL CASE
[no value]
[no value]
PopularScience_19410801_0139_002_0141.xml
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218
218
[no value]
[no value]
Bass CAMERA CO.
[no value]
Bass CAMERA CO.
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0142.xml
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218
218
[no value]
[no value]
N. Y. INSTITUTE OF PHOTOGRAPHY
[no value]
N. Y. INSTITUTE OF PHOTOGRAPHY
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0143.xml
advertisement
218
218
[no value]
[no value]
Advertisement: COLORCAMERA
[no value]
[no value]
COLORCAMERA
[no value]
[no value]
PopularScience_19410801_0139_002_0144.xml
advertisement
219
219
[no value]
[no value]
Advertisement: Popular Science
[no value]
[no value]
Popular Science
[no value]
[no value]
PopularScience_19410801_0139_002_0145.xml
advertisement
219
219
[no value]
[no value]
HARLEY-DAVIDSON MOTOR CO.
[no value]
HARLEY-DAVIDSON MOTOR CO.
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0146.xml
advertisement
220
220
[no value]
[no value]
DURD METAL PRODUCTS COMPANY: Duro 10-inch Tilting Arbor Saw
[no value]
DURD METAL PRODUCTS COMPANY
Duro 10-inch Tilting Arbor Saw
[no value]
[no value]
PopularScience_19410801_0139_002_0147.xml
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220
220
[no value]
[no value]
MEAD GLIDERS: KI-YAK
[no value]
MEAD GLIDERS
KI-YAK
[no value]
[no value]
PopularScience_19410801_0139_002_0148.xml
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220
220
[no value]
[no value]
WITTE ENGINE WORKS
[no value]
WITTE ENGINE WORKS
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0149.xml
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220
220
[no value]
[no value]
D. W. ONAN & SONS
[no value]
D. W. ONAN & SONS
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0150.xml
advertisement
221
221
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0151.xml
advertisement
222
222
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0152.xml
advertisement
223
223
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0153.xml
advertisement
224
224
[no value]
[no value]
Advertisements
[no value]
SOUTH BEND LATHE WORKS
swing South Bend Tool Room
SOUTH BEND LATHE WORKS
swing South Bend
[no value]
[no value]
PopularScience_19410801_0139_002_0154.xml
advertisement
225
225
[no value]
[no value]
Wm. H. Wise & Co., Inc.
[no value]
Wm. H. Wise & Co., Inc.
[no value]
[no value]
[no value]
PopularScience_19410801_0139_002_0155.xml
advertisement
226
226,227,228
[no value]
[no value]
LIGGETT & MYERS TOBACCO CO.: Chesterfield
[no value]
LIGGETT & MYERS TOBACCO CO.
Chesterfield
[no value]
[no value]
PopularScience_19410801_0139_002_0156.xml