Excerpt from The Constants of Nature, Vol. 1: Specific Gravities; Boiling and Melting Points; And Chemical Formula About two years ago, while engaged upon the study of some interesting points in theoretical chemistry, the compiler of the fol lowing tables had occasion to make frequent reference'to the then existing lists of'specific gravities. None of these, however, were complete enough for his purposes. Bottger's work was too Old, and i not suitably arranged; and the tables published in the various larger treatises on chemistry were lamentably small. Accordingly he pre pared a set of Specific Gravity Tables for his own private use, without view toward publication. The material proved abundant; revisions and re-revisions became necessary, and, finally, it seemed to the writer advisable to complete and publish the tables. And in the final revi sion the boiling and melting points, and the references to original papers were added. 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.