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 373
e observed, that during the hauling up, thecarriage is prevented from falling back by means of three or more pawls at different parts of the fram-ing, working on the rack on the midway. The launching of a vessel from the slip takes place very easily, by putting the cross-pieces and chock-blocks…
Mechanical engineering · Mechanics · Engineering
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