Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 58
RICITY flattens the film, and by frictional resistance, prevents themomentum of the film causing any up and down vibration. The Intermittent Movement.—Various devices have beenintroduced for producing the intermittent movement necessaryin projecting motion pictures. The movement consists… … INITIAL POSITION^
Electrical engineering
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