Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 618
Fic. 2, FURNACE DOOR AND FRAMEShowing Plugs for Water Pipes Continued on Sext Page HEATING SPECIALTIES 547 THE EXCELSIOR STEEL FURNACE CO. EXCELSIOR DOUBLE SAFETY FURNACE PIPE. … ately over the fire pot, and is thus heated quickly to ahigh temperature. The draft door on the Furnace isconnected with the door covering the opening into theGas Ring, and as the same chain controls both, an in-crease in draft from below results alike in a correspond-ing increase in the supply of…
Building materials
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