Excerpt from The Elements of Experimental Chemistry, Vol. 1 of 2 During the interval which has elapsed since the publica tion of the last edition of these volumes, the progress of Chemistry, though not marked by discoveries of equal con sequence with those which have distinguished former periods of its history, may still be traced in our improved knowledge of the properties of several bodies, and in the formation of some new and interestipg compounds. The exhibition, for the first time, of many 'of the gases in a liquid form, by slowly generating them in strong glass tubes, strengthens. The probability that the molecules of all gases are sus ceptible of similar approximation, and encourages the hope that the few, which continue to be known to us in an elastic state only, will ere long be made to assume the more palpable form of liquids. The production and analysis of the cyanic and fulminic acids, and the discovery of new a'eriform combinations of carbon and hydrogen, have fur nished more decisive evidence than we before possessed, that compounds, differing essentially as to their properties, may nevertheless agree not only as to the kind, but the propor tions, of their elements. Among bodies so constituted, we are led to conclude that the distinctions depend on modes of arrangement of their elements or atoms, which at present we are not prepared to explain, nor perhaps even to investigate successfully. The atomic weights, also, of a great number of substances, have been lately scrutinized, by chemists in various parts of Europe; and in our own country an elaboratememos. 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.