Excerpt from Things That Are Usually Wrong Whoever designs a new machine or an improvement on an old one conceives of some feature or ruling object of his design or some feature that is an improvement on pres ent practice and neglects the other features - simply follows common practice without considering whether the other features may not be as open to improvement as the special feature he is working out. As an example, the designer of a new lathe for high-speed steel or the electric drive invents a new headstock, puts more iron in the bed, sticks under it the old supports, puts on the old tailstock, uses the old slide - rest and the compound rest, without a thought as to whether there are any better ways. The writer knows how this is done because he has done the trick himself over and over again, and the object of these comments on the things that are usually wrong is to stimulate designers to avoid them. 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.