Publisher's Synopsis
Excerpt from Principles of Mechanism: Designed for the Use of Students in the Universities, and for Engineering Students Generally
Apart from the writings on the science of Mechanics, the history of which is well known, a number of books have been produced from time to time, having for their subject Machinery. At first, however, the leading prin cipteof classification in these is derived from the pm'pose hr which each machine is designed, and accordingly these books are either confined to machines destined for one particular kind of work, as in the early treatises of Val turius (1472) and Agricola (1550) on warlike and mining machinery respectively; or else they are collections of machines classed and described with reference to the Objects for which they are constructed; divided, for ex ample, into machines for raising water, for grinding ?our, sawing timber, and so on. The earliest of these collections are the treatises of Besson Ramelli Strada Zonca Branca Rockler and the list might be continued without interruption to the present day.' The voluminous Theatrum Machi narum' (1724) of Leupold, although it falls under the same description, yet in its first volume contains the first Mempt to consider the parts of machinery separated from their work, and referred to the modifications of motion. Andalthough these parts are made to follow the usual mechanical powers, and are mixed up with considerations Office, yet we find chapters on the crank, on cams, on machines for converting a circular motion into a rectilinear, or 0 back and forwards motion, and for converting a back and fvfwards motion into a continued circular motion, and so 011. This must, in fact, be considered as the first attempt tintroduce a systematic treatise on Mechanism. But the first clear statement of the true principles upon which the Seance of Kinematics must be based, was made by Euler.
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