Excerpt from The American Journal of Science, Vol. 35 Centrum, S. C. 0 51 06 Washington, D. C. 452 53 20 Prof. Newcomb Washington, D. C. 452 53 23 Alex. Mcadie. Baltimore, Md. 487 53 20 R. Randolph. New York, N. Y. 645 54 30 M. C. Whitney. Dyersburg, Tenn. 569 54 00 Louis Hughes. 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.