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Light rays combat air raids by blinding pilots Light rays combat air raids by blinding pilots
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Experts "pull teeth" of bombs in armored pit Experts "pull teeth" of bombs in armored pit
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Popular Mechanics, v. 59, n. 4, 1933
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Warship leaving base for tactical exercises Title: Warship leaving base for tactical exercises
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One boat navies
One boat navies
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Citizens train in gas masks for air attacks Citizens train in gas masks for air attacks
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House dropped by bomber on mountain top
House dropped by bomber on mountain top
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Popular Mechanics, v. 59, n. 3, 1933
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Guardsmen play war games with toy army Guardsmen play war games with toy army
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Submarine has boat "island" for waterproof craft Submarine has boat "island" for waterproof craft
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Wing to wing Wing to wing
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Popular Mechanics, v. 59, n. 1, 1933
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Silencer for artillery
Silencer for artillery
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Persuit plane for two men developed for army Persuit plane for two men developed for army
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Tear-gas gun for wrist is fired by string Tear-gas gun for wrist is fired by string
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Tanks "armored" with paper used by german army Tanks "armored" with paper used by german army
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Popular Mechanics, v. 58, n. 6, 1932
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Radio orders drill marines thousand miles away Radio orders drill marines thousand miles away
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Miracles of precision in formation flying display prowess of Uncle Sam's war eagles Miracles of precision in formation flying display prowess of Uncle Sam's war eagles
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Rifles reduced in power by reloads Rifles reduced in power by reloads
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Popular Mechanics, v. 58, n. 5, 1932
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Tank leaps thirty-five feet at fifty miles an hour Tank leaps thirty-five feet at fifty miles an hour
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Treated wood stops bullet
Treated wood stops bullet
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Bombproof hut of concrete shelters from air raids Bombproof hut of concrete shelters from air raids
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Balsa wood in army bridges outfloats cork
Balsa wood in army bridges outfloats cork
