Excerpt from The Elements of Machine Design or Chiefly on Engine Details, Vol. 2
The present volume deals chiefly, though not exclusively, with steam-engine details. The subjects discussed form, it is believed, a definitely related group, embracing most of the mechanical problems which occur in machinery for generating power; problems which are, on the whole, more complex than those examined in the First Part of this treatise.
The general data of the strength of materials and the laws relating to the dependence of dimensions on straining actions are given in Part I. But in the cases to which these laws are there applied the straining actions are generally steady or statical, or may for practical purposes be treated as being so. In the design of Transmissive Machinery, in addition to questions of strength, kinematical problems are those most commonly presented. In Part II., which relates to machines the object of which is to supply mechanical energy for doing work, the parts of which move at varying speeds and are subjected to varying forces of inertia which are too large to be neglected, dynamical principles find a more frequent application.
A treatise such as this has a double function. It is partly a collection of designs, data, and rules, of use in the workshop and engineering drawing-office.
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