Excerpt from Useful Tables From the American Practical Navigator The following tables comprise Part II of the American Practical Navigator, by the late Nathaniel Bowditch, LL. D., as revised in 1880 and in 1903, and again in 1914, under the direction of the Bureau of Navigation, Navy Department. In the present edition, as in that of 1914, former tables 28a, 283, 28c, and 28d, Latitude by Polaris; 37, Logarithms for Equal Altitude Sights; 37a, Equation of Equal Altitudes near Noon, have been omitted; but the former assignment of table numbers and page numbers has not been disturbed, the pages on which these tables were printed being simply dropped from the book and the tables and pages not renumbered consecutively. This accounts for the absence of pages 717 to 724 and 734 to 738, both inclusive; while page 531 is left blank in order to let Table 2 begin on a left-hand page. 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.