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 96
reet, with an elevation of 8 or 9 feet. The sides of these frames are furnished with mortises or lugs,by which two adjoining strings can be keyed together with wooden bolls. The top is a flat cover ol 92 IRON. Bcantling, ■with traps that can be opened or shut for the passage of air, and also for…
Mechanical engineering · Mechanics · Engineering
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