Excerpt from An Elementary Treatise on the Application of Trigonometry to Orthographic and Stereographic Projection, Dialling, Mensuration of Heights and Distances, Navigation, Nautical Astronomy, Surveying and Levelling: Together With Logarithmic and Other Tables; Designed for the Use of Students of the University at Cambridge, New England The branches of mathematics comprehended in this volume have usually made a part of the course of instruc tion at the public seminaries of the United States. But the best treatises upon these subjects are too extended, and of too practical a nature, to be used as a text-book. What is here offered is intended to furnish only those general principles and leading 'methods, which afford a useful. Exercise to the learner, and which may be consid ered as belonging to the pursuit of liberal studies. The works principally used in preparing this treatise are Cag noli and Bonnycastle's Trigonometry, Delambre's As tronom y, Bezout's Navigation, Puissant and Malortie's Topography. The tables, except those of meridional parts and astronomical refractions, are from the stereotype plates of Bowditch's Practical Navigator, the correctness of which is too well known to need any recommendation. 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."