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2Machines of draft are constructed for the purpose of removing or raising great weights. The scaling machine is one more of boldness than art, being a combination of longitudinal timbers connected together by cross pieces, the splicings well lashed together, and the whole supported by shores or props. But the machine which, by the action of wind, produces very pleasing effects, requires great ingenuity in its construction. The machines for draft perform much greater and more important operations, in their application to different purposes, and, when skilfully managed, are of great utility.
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