9 GLASS FOR SCIENTIFIC, NAUTICAL, GEODESIC, ELECTROTECHNICAL OR ELECTRONIC, PHOTOGRAPHIC, CINEMATOGRAPHIC, OPTIC, WEIGHING, MEASURING, SIGNALLING AND CHECKING; GLASS FOR APPARATUS FOR SENDING, TRANSMITTING, RECEIVING AND AMPLIFYING TELEGRAPHY AND TELEPHONY; GLASS FOR SCUBA GOGGLES AND HELMETS; GLASS FOR VIDEO CASSETTE RECORDERS, TELEVISIONS AND WORD PROCESSORS; GLASS FOR LUMINOUS SIGNS; SCIENTIFIC AND INDUSTRIAL LABORATORY GLASSWARE APPARATUS AND INSTRUMENTS; GLASS LENS BLANKS FOR TELESCOPES, ASTROPHOTOGRAPHY LENSES, ELECTRIC AND ELECTRONIC CALCULATING APPARATUS; GLASS FOR COMPUTERS; GLASS FRAMES FOR TRANSPARENCIES; GLASS COATED WITH A CONDUCTING AGENT FOR PRINTED CIRCUITS AS USED IN ELECTRONICS; GLASS FOR RADIOLOGY SCREENS; OPTICAL GLASSES NAMELY GLASS FOR OBJECTIVES, LENSES, PRISMS AND OPTICAL MIRRORS, GLASS FOR SOLAR REFLECTORS