Transactions of the Society of Motion Picture Engineers (1922)

horses, racing and hurdling and innumerable other subjects, but utterly failed to appreciate the goal which it was my ambition to reach and in which I foresaw the tremendous, inestimable value of "Analysis-of-Motion" motion pictures. My ambition had been to prove to the scientific and professional world the value of "Analysis-of-Motion/" and I may say the "Novagraph" cameras are now being used many times more active in the domain of mechanical and medical science than in the field of pure amusement. It is not necessary to explain here the great difference between standard motion picture photography and "Analysis-of -Motion" photography. All motion picture people know that if film is exposed to the subject at the rate of four a second and projected at normal speed, action that consumed four seconds in actuality is shown on the screen in one, and the result is the exaggerated speed often used Fig. 2 — Novagraph "Analysis-of-Motion" Motion Picture Camera. Back and side open showing Duplex Film Magazine Box in position, film threaded as in high-speed operation. in comedies. Pictures taken at the rate of thirty-two a second and projected at normal speed would show in two seconds something that actually took place in one. The new and greatly improved "Novagraph" cameras expose film to the subject a minimum of 480 times per second, and the projection of the positive print at normal speed permits a thirty-second study of an action actually completed in one second. In analyzing the flight of a 12-inch projectile, weighing 1500 lbs., with a velocity of 2007 feet per second, it was possible to obtain a perfect picture of the projectile as it approached and came in contact with a 12-inch thick armor-plate target, case hardened throughout, through which was proven the projectile did not penetrate the target at the point of impact, as a decided skid was shown prior to penetration. The target was set at an angle of twenty-five degrees 66