Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 617
FlG. EXCELSIOR FURN.ACE F P.^TTERNFor Hard Coal … 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.
Building materials
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