Excerpt from Journal of the Franklin Institute of the State of Pennsylvania, 1834, Vol. 18: Devoted to the Mechanic Arts, Manufactures, General Science and the Recording of American and Other Patented Inventions It is well known that the bars become loose from vibra tion, and other causes, and in running round a curve in the direction of the arrow in the figure; the centrifugal force acting against the bar A, forces it from its place, which leaves the point ofthe bar B projecting; this defect is often increased by the bars being previously out of line. 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.