Putnam, J. Pickering (John Pickering), 1847-1917 · Boston, Ticknor and Co. · leaf 330
typical of the rest. This table skives only the differ-ence between the temperature of the air before and after passing throughthe heater. By these tests we found that the combustion of the firstthree kilograms of fuel would have yielded, before the fire went out,over 1,248 units of heat in each… … Fig. 239. The Sanitary Grate. Front View.
Fireplaces
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