The Mechanics of Engineering: Intended for Use in Universities, and in Colleges of Engineers (Classic Reprint) - Tapa blanda

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Excerpt from The Mechanics of Engineering: Intended for Use in Universities, and in Colleges of Engineers

Mechanical Powers; - a tradition derived from the later Greek'writers, and quite unsuited to the present state of Mechanism. The classification of the Elements of Ma chines which I have adopted, (in Chapter I.) is borrowed in a great measure from that which Professor Willis has usually employed in his Lectures, and is about to publish in his work on Mechanism. The subject of Oblique Arches has not, so far as I have seen, been hitherto treated on Statical principles. As one of the most re markable steps ever made in structure, it cannot fail to excite the curiosity of the intelligent student of Mechanics. The results to which I am led (chap. Iv. Sect. 2, and Chap. V. Sect. Are of some elegance. It may perhaps be thought that the solution of the problem in which we reject friction, is a mere useless exercise of ingenuity; but I think the student will find it aid him much in forming his conception of the relations of the forces by which Oblique Arches are supported. The Chapters upon Labouring Force are in a considerable degree borrowed from French writers, (navier, Poncelet, and others,) who have lately prosecuted this subject with great zeal, and in a very in structive manner. I have attempted, however, to present this matter in a more systematic shape than my predecessors. I have ventured to employ the term Labouring Force.

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