[Interior, manufacturing shop, metal melting furnace oven.]
Dentist Laboratory, locker Room.
Dentist Laboratory, buffing and grinding machines.
118 Maiden Lane. Elkworth, melting pot and blast furnace.
Dentist Laboratory, articulating Machines.
Dentist Laboratory, general view of classroom looking north.
Dentist Laboratory, taking working drawer out of cabinets.
Dentist Laboratory, general view of classroom looking south.
East 22nd Street. Empire Hat co., gas furnace for melting lead.
Furnace and boiler room
10 E. 31st Street. Livingston Radiator Co., small furnaces for soldering irons.
Gas laboratory
[Interior, detail of oven furnace.]
20 John Street. Goldsmith Bros., crucible and muffler furnace.
[Interior, B. Altman & Company. Furnace room.]
[Interior, gas appliance showroom, furnace ovens.]