track is properly focused when the subject. is properly focused. Inside the tracted the attention of experimentalists in the then by the operator, and at the moment that the train youthful art of photography. About ten years ago the camera is a strip of gelatine filui 234 inches wide and comes into… … plained. By the time the last car of the train has The length of the film varies means of a number of cameras, whose shutters were flashed by, 160 feet of film has streamed past the lens, for different subjects, and, in the case of a prolonged operated by the wings of the birds as they flew across…
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