Word: minuteâ
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...that the anti-aircraft guns scored one or more direct hits in 75% of the trials. The Navy has a gun that fires 13-pound projectiles 24,000 feet in the air, and another that fires 50-pound projectiles 28,500 feet, both of which fire 14 shots a minute???so that a battery of eight projectiles can deliver 112 shots a minute; also, machine guns that will fire 400 half-inch projectiles a minute to a height of 8,000 feet...
Moving Pictures. Photographs at the rate of 300,000 a minute???31 times as fast as those taken by the slow-motion camera?are being made at Shoeburyness, England, by the British Ordnance Department, to examine the impact of shells on armor plate. The camera weighs two tons, and shows how golf balls and other hard objects are flattened and pressed out of shape when struck and in flight...