Show photographs bullets entirely automatic when the operator Is prepared to take a cletu picture re lie ho starts tile the electric motor when it a sufficiently high chargo charge has been built up a red electric laine la Is lighted signifying that tho the apparatus la Is ready for work tho the bullet la Is then fired from we tho time the projectile leaves the guu gun until tile tho picture la Is completed la Is scarcely six thousandths of a second the bullet passes across tho the plate which la Is eight inched wide in about ten thou of n second the linage Is impressed on tho the plate in two of a second 30 90 accurately cura curn tely can the spark bo be twined that successive pictures of bullets leaving a gun show every stage of the firl from tile moment tho alio first air Is forced from tho the barrel to tho the time when tho the projectile hns has leaped well beyond reach of tile the gas blast special enro caro la Is taken to make tile the spark bpark as nearly bastan its as po pos isible albao an ordinary electric spark such as Is used for auto mobile ignition Is not fast enough it Is also possible to obtain a clear photograph of a bullet while piercing an obstacle and observe its behavior from which valuable information may bo 0 obtained for tho the construction of or ar piercing bullets |