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July 27, 1929, Vol 93, No. 4 >
ARTICLE | July 27, 1929

LONDON

JAMA. 1929;93(4):313-314. doi:10.1001/jama.1929.02710040065021.
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ABSTRACT

New Appliances for Divers  The admiralty has concluded important and successful tests of two new diving appliances. One is a device enabling submarine crews to escape in emergency to the surface; the other has increased the depth at which it is possible for a diver to work in flexible diving dress. The greatest depth to which naval divers had hitherto descended is believed to be 204 feet. With the new apparatus they have reached a depth of 300 feet, establishing a new world's record. The apparatus for the use of submarine crews weighs only from 4 to 5 pounds (about 2 Kg.). It is strapped on the chest and has a flexible tube with a mouthpiece through which the man breathes. The air exhaled into the apparatus is regenerated by absorption of the carbon dioxide and restoration to it of oxygen. It was severely tested. Wearing the apparatus, men sunk

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