National Affairs: Demonstration

In 1927 the submarine S-4 went to the bottom, drowned 40 men (TIME, Dec. 26, 1927). To avert such catastrophes, Lieut. Charles B. Momsen developed a special "lung" life-preserver for submariners (TIME, Feb. 18). Last week at the mouth of the River Thames off New London, Conn., Lieut. Momsen took the salvaged S-4 to the bottom again with a newsreel outfit aboard—director, camera man, sound man—to publicize the success of his device by filming ten seamen escaping to the surface.

Each time a "lung"-equipped sailor left the escape compartment, water entered. Apparatus designed...

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