Practical cinematography and its applications (1913)

Record Details:

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MICRO-MOTION STUDY 183 the true value of the invention. The pictorial time record can be compared with the best results secured under the existing practice, and the manufacturer can ascertain what economies the new plan will effect before a penny is ex- pended, or the working of his factory dis- organised by the alteration. Micro-motion study by the aid of the cine- matograph is still in its infancy. But it appears to have a wide field of utility. The pictures can be taken at any desired speed, according to the character of the work photographed, but as a rule sixteen pictures per second will suffice. It must be remembered that in this case the record is not obtained for the purpose of studying movement from the scientific or physiological point of view, as with Marey's investigations, but purely for the purpose of discovering whether certain motions are necessary to certain tasks. Obviously the expert engaged in this work must possess an intimate knowledge of movement so as to be able to follow the motions closely and accurately through their natural cycles, and must also be familiar with the work of the factory so as to tell whether a man is working to the best advantage. This faculty alone demands a long apprenticeship, .for experience is the only guide. Mr. Frank B. Gilbreth, who has brought micro-motion study prominently before the public, has devoted years