Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 552
Fin. 1273. Fig. 1274. Figs. 1273 to 1278 illustrate the principles of timbering applied to driving agallery through running material. Figs. 1273 and 1274 are parts of the con-struction on a large scale, with the technical names of the parts. Each frame iscalled a timber-set. Suppose a leading set…
Mechanical drawing
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