Excerpt from Catalogue of the Publications of the U. S. Geological and Geographical Survey of the Territories A careful record will be kept Of the addresses Of all the correspond ents Of the Survey. Societies, libraries, or persons engaged in active scientific investigation desiring to receive the publications of the Sur vey will confer a favor by communicating their wishes. A few of the publications enumerated in this catalogue are either rare or entirely out Of print. Some will doubtless be reprinted. If societies or correspondents who desire to complete their series of the publications of the Survey will indicate to the Geologist-in-charge the missing volumes, they will be sent without delay. 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.