Cooke, Josiah Parsons, 1827-1894 · Boston, Little, Brown and Company · leaf 642
ineach. After the heated gases have traversed these iron flues,they are returned around the surface of the boiler by externalflues made in the brick-work which supports it. The circuitwhich the hot gases perform in contact with the boiler surface is,not xmfrequently, 150 feet long, and the heating…
Matter · Heat
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