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 303
COINING MACHINE. 301 hours, and when all things work well, an oven must he heated and discharged in 2-1 hours. This, how-ever, depends very much on the quantity of coal which is charged. A high stratum requires a disprc-portionally longer time for charring than a low one ; when, therefore, the…
Mechanical engineering · Mechanics · Engineering
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