Front for Hot Air Furnace

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A furnace is a device used for heating. The furnace was most likely used for the manufacturing of ceramic objects. The heat energy used to fuel a furnace may be supplied directly by fuel combustion, by electricity such as the electric arc furnace, or through induction heating in induction furnaces.

Source

Government Printing Office The Official Gazette of the United States Patent Office (Washington, DC: Government Printing Office, 1895)

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