Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 622
id piece, which compels theproducts of combustion, after leaving thebody of the furnace, to travel from 15to 25 feet before entering the smoke pipe(other manufacturers furnaces carry thesmoke from 2 to 4 feet only before en-tering the smoke pipes), thus increasingthe radiation in this particular… … Fig. 3. PERFECT GAS-TIGHT, CAST-IRON HEATING FURNACE.
Building materials
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