Show recording millionth of a second according to one of the government scientists in experimenting with high power explosives used in guns cuna a chronoscope has been employed which registered the velocity of the projectile at 16 successive alve points before it left trie tile bore it was waa possible with mia apparatus to register reg leter time to the millionth of a second in former experiments where the did not exceed 1500 or 1600 feet a cocona the projectile recorded its time by bocking knock noc king lne down a series of steel triggers projecting into the bore rut with velocities of 2500 feet feel and more to the second the trigger instead of dropping frequently plowed a groove in the projectile and another device was waa necessary |