Excerpt from The American Journal of Science and Arts, Vol. 45: Whole Number, 95, Nos; 133, 134, 135, January, March, MayXVI - Notice of a peculiar mode of occurrence of Gold and Silver in the Foot-hills of the Sierra Nevada, California; by B.XVII - Observations on Skylight Polarization in Nebraska; by edward O. Chase,.I. - Editorial Correspondence. Explorations in Russian America; by W. H. Dall, 96. - Note on the Physical Geography of the Andes of Quito; by james orton, 99. - Rocky Mountain Coal beds; by F. V. Hayden, 101.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.