9 SCIENTIFIC APPARATUS, NAMELY, [ ACID AND CAUSTIC DISPENSING APPARATUS, BACTERIOLOGICAL SAFETY ENCLOSURES, ] TISSUE CULTURE ENCLOSURES, AND PARTS THEREOF; LABORATORY GLOVES, ULTRA VIOLET LIGHTS; [ CULTURE HOODS, ] KJELDAHL DISTILLATION APPARATUS, KJELDAHL NITROGEN APPARATUS, [ TITRATION UNITS, ] KJELDAHL DIGESTORS, FAT EXTRACTORS, CRUDE FIBER APPARATUS, LABORATORY EQUIPMENT WASHERS, AND PARTS THEREOF, FLASKS, AMPULES, SERUM BOTTLES; STOPPERABLE CHAMBERS, ACID TRAPS, VACUUM TRAPS, VACUUM PUMPS, VACUUM GAUGES, AND PARTS THEREOF; PORTABLE LABORATORY APPARATUS, NAMELY CARTS, TABLES, INSTRUMENT DESKS, CADDYS AND FLASK CARRIERS; TRAY DRYERS; AND FIRE EXTINGUISHERS