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