Glass Cooky Jar Becomes Diving Bell
DIVING enthusiasts for more than a year, the twin brothers, Joe and Jerome Maurice, 17-year-old high school students of Fond du Lac, Wis., invaded their mother’s pantry for their 1935-version diving helmet.
A heavy glass cooky jar was selected to form the bell of the helmet, and thick sheet copper was sealed to this to form the breast plates and shoulder supports for the jar.
Several improvements in construction were added to the new model. The air valve was placed within easy reach of the right hand, with the air hose entering the helmet from below to prevent kinking. The helmet may be swiftly slipped off in the event of accident below water.
The greatest advantage of the cooky jar diving bell is that it permits full vision in all directions with ample safety. Air is supplied through a two-cylinder pump at a pressure of 30 pounds per square inch. At a depth of 35 feet, the helmet functioned perfectly.
The helmet the twins used in 1934 was made from the end of a water tank, with a top air valve and welded port window for observation. The imperfections of this helmet led to the invention of the new one.

Jet Powers Boat
Powered by a jet-aircraft engine, a new hydroplane has been built in England for an assault on the U.S.-held water speed record of 178.497 miles per hour. Pilot of the hydroplane is Donald Campbell, son of the late Sir Malcolm Campbell, whose Bluebird held the speed record in the late 1930s. The new craft, also called Bluebird, is driven by the jet discharge into the air, as in an airplane. Steering is achieved with a marine-type rudder. The new Bluebird reportedly has excited the interest of both American and British Naval officials.

BE A FROGMAN!

Join the new national FROGMAN CLUB today. All you have to do is send $1.00—be sure
to include your name and address—and here’s what you get:
1) A miniature pair of Frog: Feet. Can be worn on key chain, lapel or hung on windshield as lucky charm.
2) An attractive membership card.
3) A Frogman decal to be used on your windshield, bicycle or notebook.
4) A booklet on “How To Swim Underwater” and “The Supreme Sport of Spearfishing”.
5) Periodic bulletins on the latest developments in Frogman equipment and news.
6) Complete catalog of Frogman equipment available for purchase.
7) A free coupon for $1.00, which can be used toward the purchase of a pair of regular size Frog Feet, $6.95 or equivalent in value. This is redeemable at your local sporting goods dealer, drug store, auto supply store or toy departments. If no such dealer available in your area, we will handle direct.

BE A FROGMAN — Send your dollar today!

Sea-Net Mfg. Co, 1428 Maple Avenue. Dept. PM-1, Los Angeles, 15, Calif.

It would have never occurred to me to explain a diving snorkel by referencing a submarine, rather I would do it the other way around. What do you think they called it before a “Snorkel”?

Swimmers Get a “Snorkel”
Breathe through the mouthpiece of a midget “snorkel” like a submarine’s, and you can stay under water by the hour. For locating fish, or just for fun, it’s sold at $7.50 by Abercrombie and Fitch, New York. At right, a well equipped swimmer uses snorkel, underwater-vision mask and foot fins.