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 875
nience and safety. The wall-washers serve the purpose of increasing the amount of surface of the wallacted upon, and thereby allow the bolts to be screwed up more tightly; and the more friable thematerial of the wall is, the larger these ought manifestly to be made. For brick walls a very…
Mechanical engineering · Mechanics · Engineering
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