Excerpt from Machine-Shop Mathematics Work Presupposed. The student is supposed to have covered the work laid down in the authors' Fundamentals of Practical Mathematics, or its equivalent, and therefore to be familiar with the use of whole numbers, common fractions, decimals, per cents, proportion, and the common tables of measure as applied to practical problems. While it is not an absolute essential that the student should have mastered the slide rule or should be thoroughly acquainted with the elements of trigonometry and with the metric system, it is desirable that he should have at least a fair working knowledge of these subjects. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.