Motion picture projection : an elementary text book (1928)

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936 MOTION PICTURE PROJECTION have their curved sides facing each other, their flat surfaces on the outside. The stereopticon condenser holder (P-l) may now be inserted in the stereopticon condenser mount (P) . The dowser hinge (P-7) should be on the opposite side from the clamping screw (P-4) and the screw should be tightened to prevent the condenser holder (P-l) from falling out of the mount. The slide carrier (P-8) (which should be taken from the former equipment) can now be inserted in place. Fig. 398 Light Beam in Motion Picture Projection Using Piano-Convex Condensers and No. 2 Objective Lens 7. HOW TO PUT THE STEREOPTICON CONDENSER MOUNT ON THE LAMPHOUSE The stereopticon condenser mount (P) should be placed in the condenser guides (A-3, Fig. 388), inserting it from the far side of the lamphouse (Fig. 392).