Excerpt from Topographic Surveying: Including Geographic, Exploratory, and Military Mapping, With Hints on Camping, Emergency Surgery, and Photography Finally, I desire to express appreciation of the assistance I have received in editing manuscript and proof from many coworkers on the U. S. Geological Survey, more particularly from Messrs. W. J. Peters, S. S. Gannett, and'e. M. Douglas on the subjects of geodesy and astronomy; E. C. Barnard and A. H. Thompson on topographic surveying; C. Willard Hayes and G. K. Gilbert on topographic forms and definitions; N. H. Darton on photography; and to Mr. W. Carvel Hall for assistance in reading proof. Two lists of works of refer ence are published, on pages 490 and 809, in which are cited the titles of all those works to which the reader is referred for further details. From nearly all of these some example or illustration has been obtained. 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.