Identifier: appletonsdiction02newyuoft (find matches)
Title: Appleton's dictionary of machines, mechanics, engine-work, and engineering
Year: 1869 (1860s)
Authors:
Subjects: Mechanical engineering
Publisher: New York, Appleton
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: MSN

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ven height; a known power i- thus expended, to which the work performed ought to hear an asable relation. The older bucket-wheels which we encounter are constructed of wood; but that material, oi• universal use in constructive mechanics, is fast giving place to iron, and in a few yeanmay expect that a wooden water-wheel will be as rare, and as much an object of antiquarian interestto those who take pleasure in reviewing the progress of the industrial art-, as wooden geering hasalready become. Many of those wheels still continue to exhibit in their constructive detail- a veiperior style of workman-hip, and an attention to durability which, in Beveral instances within the knowl- i th • writer, the lapse of a century ha- hardly conquered. The b< st specimens, no doubtremain of the truly old construction, while those of an inferior grade have disappeared and !■• • iby wheels of modern construction, in which iron, if net the sole material, holds at leasta prominentplace. 3774.
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A not hi r peculiarity, not in eon in win .* construction, altl doued by millwrights who make ) ipcrior knowledj, f the principl n of 1m draul the wheel into the l have ; t.iiion of the term, notli•ummil of the w heel, and, inVou II. 850 WATER-WHEELS. some under the designation of high-breast wheels. One of the finest specimens of this construction yeterected is that represented in Figs. 3778 and 3779, in which the height of the fall bears to the diameterof the wheel the relation of 9 to 10. In the purely overshot-wheel this relation, as we shall immedi-ately have occasion to show, is very nearly inverted. 3779.

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