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507 Mechanical Movements Mechanisms and Devices

507 Mechanical Movements Mechanisms and Devices

THE want of a comprehensive collection of illustrations and descriptions of

MECHANICAL MOVEMENTS has long been seriously felt by artisans, inventors, and students of the mechanic arts.

It was the knowledge of this want that induced the compilation of the collection here presented.

The movements which it contains have been already illustrated and described in occasional instalments scattered through five volumes of the AMERICAN ARTISAN, by the readers of which their publication was received with so much favour as was believed to warrant the expense of their reproduction with some revision in a separate volume.

The selection of the movements embraced in this collection has been made from many and various sources.

The English works of Johnson, Willcock, Wylson, and Denison have been drawn upon to a considerable extent, and many other works—American and foreign—have been laid under contribution; but more than one-fourth of the movements—many of purely American origin have never previously appeared in any published collection.

Although the collection embraces about three times as many movements as have ever been contained in any previous American publication and a considerably larger number than has ever been contained in any foreign one, it has not been the object of the compiler to merely swell the number,

But he has endeavoured to select only such as may be of real practical value; and with this end in view, he has rejected many which are found in nearly all the previously published collections,

but which he has considered only applicable to some exceptional want.

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