Excerpt from Annual Report of the Curator of the Museum of Comparative Zoölogy at Harvard College, to the President and Fellows of Harvard College, for 1880-81 The following papers have been published during the past year, giving the results of work done in the Lithological department. 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.