F. H. Richardson's bluebook of projection (1935)

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176 RICHARDSON'S BLUEBOOK OF PROJECTION teeth and/or too much tension at the projector aperture or take-up. Excessive tension works a great deal of J3A 3.40MM <t of Film l.378Ht£(35rtrt)-/./09 (2&/7VM) .999 '(25.38 tltl) J34 3.40MM \. 03 read' — 79 Mtl 22.04 MM Positive Film f\047Wad~~' .OZOPoeL i.i9 tin TirTn [^ -825' >s 20.9d>rit1 Camera Aperture Perforation Projector Aperture Fig. 54.-35 MM. Sound Film showing camera aperture, projector aperture and scanned area. These dimensions and locations are shown relative to unshrunk raw stock. Positive; emulsion side up. Negative; emulsion side down. In the camera the emulsion side of the film faces the objective. Viewed from the objective the sound track is to the left. In the projector the emulsion side of the film faces the light source. Viewed from the light source the sound track is to the right. damage, especially if the sprocket teeth are hooked or undercut. Imprint of the sprocket teeth on the film brought about when the film runs off the sprocket, which may be caused