SCIENTIFIC DEVICES-NAMELY, PROJECTING MICROSCOPES, OPAQUE PROJECTORS FOR DRAWING, CAMERA LUCIDAS, OPTICAL CONSTRUCTION SETS, PICTURE PROJECTORS, READING MACHINES, STEREOSCOPES, AND PANTOGRAPHS; LABORATORY INSTRUMENTS-NAMELY, MICRO PROJECTORS, ORTHOPTIC TRAINING MACHINES, OPTICAL BENCHES, POLARIZED LIGHT TESTING AND PROJECTING EQUIPMENT, PROJECTING EQUIPMENT FOR PROJECTING LARGE OR REDUCED IMAGES OF TRANSPARENT OR OPAQUE IMAGES, FINGERPRINT AND STAMP MAGNIFIERS, MICRO FILM READING MACHINES, MICROSCOPES AND PHOTOMETERS; AND PHOTOGRAPHIC EQUIPMENT-NAMELY, CAMERAS AND SHUTTERS, FILTERS, EASELS AND FINDERS, FILM DEVELOPING AND FIXING TANKS, FILM DEVELOPING AND FIXING OUTFITS, ELECTRIC LAMPS FOR PHOTOGRAPHIC USE, PHOTO ENLARGERS, PHOTO PROJECTION PRINTERS, FILM VIEWERS AND MAGNIFIERS, EXPOSURE AND LIGHT METERS, EXPOSURE CALCULATORS AND TESTERS, FILM FILES AND PAPER HOLDERS, FILM PACK HOLDERS, FILM REELS, FILM REWINDS AND SPLICERS, FILM EDITING MACHINES AND FILM ENLARGERS, MOTION PICTURE FILM ENLARGERS, PHOTO-FLASH SYNCHRONIZERS, PHOTOGRAPHIC LIGHTING EQUIPMENT, TIMERS AND FOOT SWITCHES, TRANSPARENCY SLIDE MOUNTING FRAMES, LENSES, DARKROOM SAFETY LIGHTS, TRIPODS AND ACCESSORIES, MOVIE CAMERAS, PROJECTORS, SCREENS AND TITLING OUTFITS, CONTACT PRINTERS, PRINT AND FILM DRIERS, FOCUSING TARGETS, RETOUCHING EQUIPMENT, RANGE FINDERS, PRINT FLATTENERS AND PRESSES, COPYING CAMERAS, MICROFILM CAMERAS, PHOTOGRAPHIC MAKING AND DEVELOPING MACHINES, AND BLUEPRINT MACHINES