Excerpt from Observations on Terrestrial Magnetism and on the Deviations of the Compasses of the United States Iron Clad Monadnock During Her Cruise From Philadelphia to San Francisco, in 1865 and 1866 The observations on terrestrial magnetism, and for latitude, time, and true bear ings, were all made by myself and recorded by Mr. Corrin F. Smith, who was cap tain's clerk on the Monadnock, and acted as my assistant when I was observing. My best thanks are due to him for the efficient manner in which he performed his duties, sometimes under circumstances of very considerable physical discomfort. 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.