The entire excellence of the engines and other machines made at the present time is the result of the superior tools which are used to accomplish the work; and because good tools are available for makers of steam-engines and all other classes of machinery, it is necessary that the tool-making processes be introduced to the student, by which all those who wish or may be obliged to make their tools themselves will be enabled to produce such instruments as are necessary for their own peculiar work.

In the second chapter a number of names, forms, and definitions of tools are given, which are sufficient for the purpose, and require perusal in order to avoid the introduction of explanations into the processes to be now considered.