Excerpt from Chemical and Geological Essays As regards the five papers which are placed at the end of the volume, the author reprints them for the reason that, incom plete and fragmentary as they are, they have a certain value in the history of chemical theory 5 and, moreover, contain, in his Opinion, the germs of a philosophy of chemistry and miner alogy which he hopes one day to develop himself or to see developed by others. 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.