Excerpt from A Method for the Identification of Pure Organic Compounds, Vol. 1: By a Systematic Analytical Procedure Based on Physical Properties and Chemical Reactions The phrase More Important Compounds used in the title is unavoidably indefinite; but the intention has been to admit all substances to the tables for which there is more than a remote chance that they may come into the hands (if the analyst as unknown compounds. Such a list naturally includes: first, all com pounds that may be isolated in a state of purity and without excessive difficultv from materials used in the arts, or from substances which occur somewhat abun dautly in Nature; second, compounds of minor importance which may easily be formed in the laboratory as by-products in reactions between substances of more common occurrence; third, many rare compounds which have acquired a general scientific interest either on account of their properties or as representatives of peculiar types. Very few compounds that could be purchased in the market in a state of purity have, been omitted except through oversight. The most important intentional omissions are: substances whose claims to recognition as distinct chemical species are not generally accepted; uncrystallizable syrups that cannot be distilled without decomposition; the oily and fatty glycerides; those glucosides and synthetic sugars of which specimens could not be obtained for examination. 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.