26 LABORATORY APPARATUS-NAMELY, INTERCHANGEABLE GLASSWARE AND COMPONENTS, EXPERIMENTAL KITS, FLASKS, FLASK HEADS, BOTTLES, BURETTES, CAPILLARIES, FILTER WARE, FUNNELS, JOINTS, TUBES, SLEEVES, ADAPTERS, CLAMPS, CLIPS, CHUCKS, BEARINGS, STOPPERS, COLUMNS, CONDENSERS, CRYSTALLIZERS, THERMOMETERS, THERMOMETER HOLDERS, STIRRERS, AGITATORS, HEATERS, MANTELS, THERMOCOUPLES, DRYING APPARATUS, EVAPORATORS, GAS BURNING APPARATUS, DISTILLATION APPARATUS, CHROMATOGRAPHY APPARATUS, APPARATUS FOR THE DETERMINATION OF MOISTURE, LIQUID EXTRACTORS, GAS EQUILIBRIUM ASSEMBLIES, VACUUM SUBLIMATION APPARATUS, REACTION APPARATUS, WATER SEPARATORS AND TRAPS, AND POWER CONTROL UNITS