A condensed course in motion picture photography ([1920])

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MOTION PICTURE PHOTOGRAPHY Sayers prize fight took place i860), a harvest home, a launch — indeed, anything, in short, where any matter of interest is enacted within a reasonably brief time, which may be seen from a single point of view. "I take for granted nothing more than — first, what photography has already realized or what we may be sure it will realize within some very limited lapse of time from the present date — viz., the possibility of taking a photograph instantaneously, of securing pictures in a tenth of a second ; secondly, that a mechanism is possible, no matter how complex or costly — and perhaps it need not be either the one or the other — by which a prepared plate may be presented, focused, impressed, displaced, numbered, secured in the dark and replaced by another within two or threetenth seconds. *'In fact the dismounting and replacing need only be performed within this interval; the other items of the process, however numerous, following these up in succession, and collectively spreading over as long a time as may be needful. "There is a pretty toy called the phenakistoscope, which presents a succession of pictures to the eye, by placing them on a wheel behind a screen, and bringing each in succession to an opening in the screen of the size of the picture and thus allowing it to be seen. The eye is in like manner covered by a dark revolving screen, having narrow linear openings in it which allow glimpses through them precisely at and only at the instant when the pictures are in the act of transmitting the frame, and sensibly in the middle of the area. "By this arrangement it has been found possible to exhibit figures in action, as dancers pirouetting, wheels revolving, etc., by having prepared a set of figures taken from one model presented at various angles to the visual ray. "Coarse as the representations so made have been, the apparent reality of movements has been very striking. The persistence of the impression on the retina and its gradual fading obliterates, or glosses over, the hiatus in a way which would hardly be thought possible. Now there is nothing in the law of periodicity as regards the movements of the model, to influence the results, and we have only to substitute for such a periodically recurrent set of pictures imperfectly drawn by hand, perfect stereoscopic and simultaneous pairs of photographs duly pre 10