Excerpt from Preliminary Report of the Field-Work of the United States Geological and Geographical Survey of the Territories: For the Season of 1877 Commencing with the area assigned to the Teton division of the sur vey at its southwestern corner, the first five weeks were devoted to the examination of the region lying in the great northern bend of the Snake River, and which includes an area of to square miles. This section consists, topographically, of a series of more or less paral lel low mountain ranges, of which the three principal ones are, the Mount Putnam Range, on the south west, and which extends southward into the adjacent district; the Blackfoot Mountains, in the central portion; and the Caribou Range, which embraces a rather wide belt of broken hill country and low mountains along the eastern border, and which culmi nates in Mount Bainbridge. These ranges have a general direction west of north and east of south, and are separated by broad, shallow depres sions, in the midst of which occur other lesser parallel ridges. To the north these low ranges die away in the great plains of the Snake Basin, which comprise about one-third the area of the section here referred to. 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.