Excerpt from Annual of Scientific Discovery, or Year-Book of Facts in Science and Art for 1861: Exhibiting the Most Important Discoveries and Improvements in Mechanics, Useful Arts, Natural Philosophy, Chemistry, Astronomy, Geology, Zoology, Botany, Mineralogy, Meteorology, Geography, Antiquities, EtcIn Biot's Astronomy the density of Mercury, resulting from the diameter and mass there given, is but in the author from whom Olmsted copies, it is put down as Laplace is between them.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.