26 LABORATORY, CHEMICAL, AND SURGICAL GLASSWARE-NAMELY, THERMOMETERS, HYDROMETERS, THERMOHYDROMETERS, ACTINOMETERS, BARKOMETERS, GLUEOMETERS, LACTODENSIMETERS, LACTOMETERS, SACCHAROMETERS, SALINOMETERS, SALOMETERS, SPRAYOMETERS, TANNOMETERS, PYROMETERS, FLASH-POINT APPARATUS, CALORIMETERS, PIPETTES, BURETTES, GRADUATED CYLINDERS, FLASKS, AND BEAKERS, COMBUSTION TUBES, CENTRIFUGE TUBES, VISCOSITY CUPS, VACUUM FLASKS, GAS-ANALYSIS APPARATUS, MILK-ANALYSIS APPARATUS, PAINT-ANALYSIS APPARATUS, WATER-ANALYSIS APPARATUS, OIL-ANALYSIS APPARATUS, DISTILLATION APPARATUS, GLASS VESSELS OF ALL KINDS FOR VOLUMETRIC MEASUREMENTS AND CHEMICAL WORK