Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 751
The Fuel used for heating the retorts may be either coal or coke, according to the relative value oleach in the district. If coal is used, a well-regulated bench will require about 18 to 20 per cent, of thecoal distilled; that is to say, to heat the retorts for the production of 12,000 cubic feet…
Mechanical engineering · Mechanics · Engineering
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