Excerpt from The Journal of the Franklin Institute, Vol. 78 of 108: Devoted to Science and the Mechanic Arts Formula 10. Buchanan's rule for the thickness of cast iron teeth for wheels, see his Practical Essav on Mill Work. John \vcnle, London, 1841, p. 109. Find the number of hon-les which are equiv alent to the power of the first mover of the train of machinery, and divide that number by the velocity, in feet per second, of the pitch line of the pinion or wheel. Extract the square root of the quotient, and three-fourths of this root will be the least thickncss of the tooth for the wheel or pinion, in inches. 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.