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Petal CAMERA

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PETAL takes brilliant pictures; 6 exposures. Each Petalargement is over three times the size of the camera itself!
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Only $20.00 postpaid incl. tax
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MYCRO CAMERA CO., INC. Dept. 1A 527 FIFTH AVENUE, NEW YORK CITY

Globe for Globe-Trotters Folds Like an Umbrella
Geographical globes of the world which can be collapsed like umbrellas are an English novelty gaining in popularity among boat travelers on round-the-world cruises. In their collapsed form, the globes take up no more space than ordinary umbrellas, making them easy to carry or to stow away in steamship cabins. When a ring on the handle is pushed upward, flexible ribs bend outward to shape the fabric on which the map is printed.

Tests Made with Living Heart in Air-Tight Chamber
BY KEEPING the heart and lungs of a dog alive in an air-tight chamber, Dr. Maurice Visscher of the University of Minnesota recently demonstrated a startling new way to perform physiological experiments. Oxygen tubes kept the organs functioning normally while he injected drugs directly into the blood stream of the heart to study their effect. Meanwhile, delicate thermostats maintained a constant temperature within the outer water-filled tank, preventing variations that would affect the experiment or cause the “death” of the transplanted organs.

Mine Detector Diagnoses Cows
The man in the white coat above doesn’t think that Bossy has a Tellermine in her cud, but he is checking to see if she’s munched a nail, screw, or bit of barbed wire. Because cows sometimes eat metal objects that cause sickness, British vets use mine detectors along with their stethoscopes. Other uses for surplus detectors are to locate metal embedded in logs that might shatter saw blades, and to spot the hairpins that women workers tend to shed into food-package assembly lines.

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BASEMENT Golf

By Allan Carpenter

POPULARITY of miniature golf has brought the game right into the basement in the form of a knockdown course that can be picked up and stored away almost as easily as you would a game of croquet. It’s an exciting game the whole family can enjoy the year round—from the youngsters on up to the avid golfer who will find it good practice in keeping his putting eye keen. Standard putters and irons are used and scoring is done as in real golf, penalties being counted as strokes. As for space, most basements, especially those with compact heating units, will accommodate the “concentrated” nine-hole course pictured in the illustration above, but, where there’s only a minimum of space, a lot of fun can be had from a much smaller course. As each green is complete in itself and lightweight, the course can be quickly set up. Most of the greens are fairly shallow to permit stacking them in little space when not in use. Where yard area is sufficient to permit an outdoor course, a suggested layout for an 18-hole one is given in the plan view on page 197. Construction of nine additional greens is given to supplement the nine shown above.
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Night-Driving Glasses Use Wire-Mesh Lenses
“Blinders” of wire mesh in new spectacles designed for night driving are said to shield the eyes from the glaring headlights of oncoming cars. Mounted in an eyeglass frame, the screening absorbs enough light to prevent retinal fatigue, without interfering with safe vision.

BEE RAISING PAYS BIG PROFITS
Get HOW TO SUCCEED WITH BEES, written by two outstanding experts, which gives more than 190 successful plans to produce big crops of honey. Join the ranks of spare time moneymakers and send for this guaranteed 90-page book today. Tells all about queens, equipment, summer, winter ami spring management, swarming, increasing colonics, how to produce section honey and ex-tracted honey, etc. loth edition, fully revised, only $1 .00.
POPULAR MECHANICS PRESS
200 E. Ontario St. Chicago 11, Ill.

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The Camera Queen

Margaret Bourke-White, who saw beauty in the lines of a steel girder and the blackness of a coal mine, pioneers a new era of photography.

by Richard H. Parke

WHEN I called on Margaret Bourke-White in her spacious penthouse studio in a Fifth Avenue office building, she had just returned to New York from photographing a new textile mill in the South. Piled high in the center of the vast room was the equipment she had carried with her: A couple of cameras, a box of flashlight bulbs, a folded tripod and three or four travel-scarred suitcases.
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New Electric Reproducer Plays Piano Accompaniment
ONE of the strangest contraptions yet to make its appearance in the musical world was exhibited recently at the German Radio Show in Berlin. Known as the “Helertion,” the device performs the function of playing an accompaniment to a grand piano. The notes are picked up by a microphone and are altered by changing the resistance in the lattice circle, which reproduces spheric sounds and noises together with the ordinary tones of the piano.

The alteration tone is carried on through a series of amplifiers and reproduced through a battery of loud speakers. Auditors who have given the system a try-out declare that the scheme opens up a new field for musical reproduction from an ordinary . grand piano. The tonal range is as great with the reproducer as with the piano itself.

SILVERICE BALLS the modern method of cooling food products

Here is the latest, sensationally new way of chilling food—cooling drinks in hot weather, and keeping food fresh and appetizing while on the table.

Place SILVERICE BALLS in any ice-making refrigerator chamber long enough to freeze—take them out—drop two balls in a glass of water, ginger ale or other drink. In a few minutes you have a cool, refreshing drink. SILVERICE BALLS placed in a butter dish or salad plate, keeps butter chilled and firm—the salad crisp and tasty.
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Well, not really, but it certainly looks like one.

Twists Test Bodies
This Ford is leaping into the air on one of its 200 trips around the “body-twist” course at the Dearborn test track. Here
body and frame are subjected to extreme torsion stresses—first in one direction, then the other—as indicated by the whipping aerial. The test is one of a series that experimental Ftfrds must undergo.

Wow. I hope these guys already have kids.

Portable X-Ray Device Aids Express Clerks
RATED at 58,000 volts and 10 milliamperes and operated by merely plugging in on any electric light circuit, a newly developed portable, shock-proof X-ray device enables express and postal clerks to speedily determine the contents of suspected packages without the need of breaking the seals. The device can also be used in industrial plants for the inspection of manufactured parts and is said to be satisfactory for medical use, providing clear radiographs of the human body. The photo at right shows the compact X-ray unit being used to examine the contents of a suspected express package.