Practical cinematography and its applications (1913)

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i;8 PRACTICAL CINEMATOGRAPHY In one corner of the assembling room the wall and floor were marked off into four-inch squares. In this space was placed the bench, together with the sets of component parts. Here there was a slight divergence from the existing practice in the factory. Instead of taking the pieces from various boxes, packets of parts were placed in convenient positions upon a rack. These were placed in the proper sequence, so that the workman was saved the task of thinking when selecting the successive pieces. He was able to take them up quickly and correctly in a mechanical kind of way. The timing clocks were placed in a prominent position facing the camera, and when all was ready, the workman was given the word to start. The whole operation of fitting the pieces of a machine together were filmed in this manner so as to give a complete cinematographic record of the assembling of a machine. Now in micro-motion study the films are not intended for projection. Instead of being screened, the pictures are studied with the aid of a magnifying glass, the motion in each picture being closely examined to detect whether it is essential to the task, whether it might be eliminated, or shortened. As the wall and floor are marked off into four-inch squares, the investi- gator is enabled to ascertain the precise length