Excerpt from The Mechanical Principles of Engineering and Architecture The editor would remark that he has carefully refrained from making any alterations in the text revised, except cor rections of typographical errors, and in one instance where, from a repetition of apparently one of these, he apprehended some difficulty might be offered to the student if allowed to remain exactly as punted in the original. 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.