FOCI

SCIENTIFIC AND OPTICAL INSTRUMENTS-NAMELY, MICROAMMETERS, SPECTROFLUOROMETERS, COLLIMATORS, COMPARATORS, FILTERS, LENSES, MICROSCOPES, MONOCHROMATORS, PHOTOGRAPHIC LENSES, PRISMS, PROJECTION SCREENS, PROJECTORS, SPECTROMETERS, TELESCOPES, TELEVISION LENSES AND TOOLMAKERS' MICROSCOPES; OPTICAL SIMULATORS AND SIMULATION EQUIPMENT-NAMELY, VISUAL TRAINING AIDS COMPRISED OF SIMULATED COCKPITS, DRIVERS' SEATS AND LOCOMOTIVE CAB SEATS OR STOOLS, AND SCENE GENERATING ATTACHMENTS THEREFOR