-
Midget x-ray apparatus is immersed in oil Midget x-ray apparatus is immersed in oil
-
Electrical achievements signalize unknown hero honors Electrical achievements signalize unknown hero honors
-
Life-line gun fired from shoulder Life-line gun fired from shoulder
-
Popular Mechanics, v. 38, n. 6, 1922
-
Popular Mechanics, v. 38, n. 5, 1922
-
Popular Mechanics, v. 38, n. 4, 1922
-
Popular Mechanics, v. 38, n. 3, 1922
-
Popular Mechanics, v. 38, n. 2, 1922
-
Popular Mechanics, v. 38, n. 1, 1922
-
Popular Mechanics, v. 37, n. 6, 1922
-
Popular Mechanics, v. 37, n. 5, 1922
-
Popular Mechanics, v. 37, n. 4, 1922
-
Popular Mechanics, v. 37, n. 3, 1922
-
Popular Mechanics, v. 37, n. 2, 1922
-
Popular Mechanics, v. 37, n. 1, 1922
-
Utilizing new steel trench helmets Utilizing new steel trench helmets
-
Floor lamp made from old musket Floor lamp made from old musket
-
Japanese device for testing the degree of fatigue Japanese device for testing the degree of fatigue
-
Bullet-proof jacket proved effective by police tests Bullet-proof jacket proved effective by police tests
-
Catapult launches airplane from battleship
Catapult launches airplane from battleship
-
Comined knife and saw useful implement Comined knife and saw useful implement
-
Wing-load indicator keeps airplane pilot in safety Wing-load indicator keeps airplane pilot in safety
-
Anti-infantry airplane carries 30 guns Anti-infantry airplane carries 30 guns
-
Wheels propel auto-boat on land or in water Wheels propel auto-boat on land or in water
-
World's biggest naval gun tested at Aberdeen World's biggest naval gun tested at Aberdeen
