Excerpt from A Memoir of Theodore Strong, LL. D: Prepared at the Request of the National Academy of Science, and Read Before That Body Thursday Evening, April 17, 1879 Whilst preparing his work on the Calculus, which be pro posed to publish at his own expense, some friend expressed apprehension that, from the nature of the work, it would not be a pecuniary success, but money thrown away. His reply was characteristic. No matter, said be, it will be appreciated by posterity, and show at least that I have not lived in vain and that is all I ask! 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.