Excerpt from Journal of the Franklin Institute of the State of Pennsylvania, for the Promotion of the Mechanic Arts, Vol. 81: Devoted to Mechanical and Physical Science, Civil Engineering, the Arts and Manufactures; January-July, 1866 For the Journal of the Franklin Institute. On the Construction of the Screw Propeller of Uniformly Expanding Pitch. By D. M. Greene, U. S. Naval Engineers. 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.