Book excerpt: Excerpt from The Mechanics' Magazine, Museum, Register, Journal, and Gazette, Vol. 35: July 3rd, 1841-December 25th, 1841 By the arrangements which Mr. Hick has adopted, gravity, although still a constant force, was capable of being controlled by the quantity of op osing surface brought into action, so t at by varying the angle of the fans or vanes, a capability of adjustment was afford ed, not readily attainable in the origi nal form of apparatus. 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.