Excerpt from Biographical Memoirs, Vol. 5 In accordance with the rules of the National Academy of Sciences, it is the duty of the President, upon the death of any member, to select some one to prepare a biographical memoir of the deceased. Such memoirs have been collected in per manent form from time to time, for the use of the Academy and for distribution among the large libraries of the country. 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.