Excerpt from Zo logy: A d104book for Colleges and Universities The thread of our narrative is broken at intervals by biographical Chapters. We are too apt to receive the gifts of science without asking whence they came. It is well, therefore, to learn something of the lives of those who have made discoveries or organized scien tific work. What we have today was not gained without arduous toil and persistent zeal, Often in the face of many difficulties. As the pious studied the lives Of the saints, so may we pause now and then to learn how scientific heroes have won new territory for the kingdom of science. Thus, if we have any thing of generous response within us, we may return to our studies refreshed, resolving that we also, in some measure, will further the good cause. 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.