OPTICAL INSTRUMENTS-NAMELY, [ OPTICAL LENSES AND LENS ARRAYS, ] PRISMS, [ GUNSIGHTS, BOMB SIGHTS, RANGE FINDERS, PERISCOPES, ] GUNFIRE CONTROL APPARATUS, OPTICAL TOOLING SYSTEMS FOR AIRCRAFT, OPTICAL ALIGNMENT SYSTEMS FOR POWER GENERATORS, OPTICAL TOOLING SYSTEMS FOR AUTOMATIC MACHINERY AND MACHINE TOOLS, [ INFRARED INSTRUMENTS, TELEPHOTOSCOPES, TELEVISION OPTICS AND SCREENS; ] ALSO, OTHER INSTRUMENTS FOR OPTICAL, CHEMICAL, PHYSICAL, MEDICAL AND INDUSTRIAL LABORATORIES, INCLUDING [ ELECTRONIC...