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Modern Soldier in Suit of Armor Resembles Knight of Old Modern Soldier in Suit of Armor Resembles Knight of Old
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Gas Mask Has Loud Speaker to Amplify Muffled Voice Gas Mask Has Loud Speaker to Amplify Muffled Voice
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Three-Man Submarine Makes 1,800-Foot Drive Three-Man Submarine Makes 1,800-Foot Drive
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Anti-Aircraft Searchlight Unit Has "Outrigger" Guide Wheel Anti-Aircraft Searchlight Unit Has "Outrigger" Guide Wheel
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Popular Mechanics, v. 73, n. 2, 1940
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Camera "Gun" Trains Fliers without Wasting Ammunition Camera "Gun" Trains Fliers without Wasting Ammunition
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Gas Masks to Protect Dogs Fit All Sizes and Breeds Gas Masks to Protect Dogs Fit All Sizes and Breeds
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Ninety-Two-Ton French Tank Is New Monster in War Ninety-Two-Ton French Tank Is New Monster in War
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Flash Bomb Lights City for Air Cameraman Flash Bomb Lights City for Air Cameraman
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London Cars Wear Slotted Masks on Headlights as Raid Protection London Cars Wear Slotted Masks on Headlights as Raid Protection
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Buoys Mark Lanes in Sea Cleared by Mine Sweeper Buoys Mark Lanes in Sea Cleared by Mine Sweeper
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Army Automobile for Roughest Road Can Climb Steep Slopes Army Automobile for Roughest Road Can Climb Steep Slopes
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Aerial torpedo is called bloodhund of the sky
Aerial torpedo is called bloodhund of the sky
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Plane is propelled by feet in seven-yard flight Plane is propelled by feet in seven-yard flight
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Iron-ore island target for airplane bombs Iron-ore island target for airplane bombs
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Secret of submarine revealed by camera Secret of submarine revealed by camera
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How a homemade cannon served the purpose of an "excellency" of old mexico How a homemade cannon served the purpose of an "excellency" of old mexico
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''Noiseless'' Sea Skimmer to Battle Submarines ''Noiseless'' Sea Skimmer to Battle Submarines
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Deadly Mines Wahsed in by Sea Are Set Off by Coast Guard Deadly Mines Wahsed in by Sea Are Set Off by Coast Guard
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Fourteen-Inch Guns Guard Panama Canal Fourteen-Inch Guns Guard Panama Canal
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Four-Gun Anti-Aircraft Tank fires 5,220 Shots A Minute Four-Gun Anti-Aircraft Tank fires 5,220 Shots A Minute
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Popular Mechanics, v. 73, n. 1, 1940
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Seals shot from "blind" carried on sled Seals shot from "blind" carried on sled
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Toy plane helps to train anti-aircraft gunners Toy plane helps to train anti-aircraft gunners
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Plane for sea or sky has detachable wings Plane for sea or sky has detachable wings
