Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 670
themselves. Comparative Cost—Gas as manufactured by the SpringfieldGas Machine costs less than $1.00 a thousand feet. A flat flameburner consuming city gas at the rate of four cubic feet per hourgives a light of sixteen candles; whereas a Springfield IncandescentBurner consuming three feet per hour… … AIR PUMP
Building materials
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