9 LABORATORY GLASSWARE AND LABORATORY APPARATUS, NAMELY POLARISCOPES, BURNERS, MEASURING DEVICES, MARKERS, STOPPERS, VALVES, PROTECTIVE SAFETY EQUIPMENT, OXYGEN GENERATORS, VERNIERS, CALIPERS, MICROMETERS, RODS, TUBING, CELLS, CONTAINERS, TRAYS, TANKS, DISKS, SLIDES, RIBBON, JOINTS, STOPCOCKS, HOSE CONNECTIONS, SEALS AND FLASKS