[Interior, manufacturing shop, metal melting furnace oven.]
Dentist Laboratory, locker Room.
Dentist Laboratory, buffing and grinding machines.
Dentist Laboratory, articulating Machines.
118 Maiden Lane. Elkworth, melting pot and blast furnace.
Dentist Laboratory, general view of classroom looking south.
Dentist Laboratory, general view of classroom looking north.
Dentist Laboratory, taking working drawer out of cabinets.
East 22nd Street. Empire Hat co., gas furnace for melting lead.
10 E. 31st Street. Livingston Radiator Co., small furnaces for soldering irons.
Furnace and boiler room
Gas laboratory
Repairing grate bars to furnace, before and after.
[Interior, detail of oven furnace.]
[Interior, manufacturing shop, metal melting oven.]