Transactions of the Society of Motion Picture Engineers (1922)

from the gun. Unfortunately, at the instant of penetration flying spHnters destroyed the lens and demolished the front of the camera. Within the past three weeks an *'Analysis-of-Motion" picture of an automobile was made, covering 100 feet of measured roadway. The automobile covered the distance in three seconds flat and 1208 perfect pictures in 75 feet of film were secured. In analyzing this test the following results were proven : 1. Four hundred perfect pictures per second were secured. 2. The film exposure was 25-feet per second, an average of 400 feet in 16 seconds. 3. One perfect picture for every inch of the 100 feet covered by the automobile was secured. In this test the "Novagraph" camera used was by no means driven to its maximum speed. It can readily be operated at double that speed with a possible resulting twice as many pictures per second. Fig. 3 — Novagraph "Analysis-pf-Motion" Motion Picture Camera ready for operation. Film exposure 300 per second. I am proud to say that I have had the privilege of making *Analysis-of-Motion" motion pictures of many medical subjects, particularly of persons afflicted with nervous disorders resulting in constant and uncontrollable twitching, jumping and thrashing about with arms, legs and body, together with heart analysis pictures, which have won highest commendation both in this country and abroad. In one instance, as one of ten subjects, I made a series of "Analysis-of-Motion" motion pictures of a young woman, who at the age of seventeen years, lay for many days at the point of death as the result of fright sustained during the course of a particularly severe electric storm. Within two months thereafter symptoms of hysteria developed and continued until at the age of twenty, three years after the occurrence, she became practically helpless, unable to