A Study of Colophony Resin

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Excerpt from A Study of Colophony Resin: A DissertationIt must not be forgotten however, that other substances, such as terpenes and their oxidation products, ' are always present in rosin, and these might tend to reduce the carbon content of the whole. The first crystallizations of abietic acid will, moreover, contain a smaller percentage of carbon than than the pure product, and even a small quantity of impurity will reduce the percentage of this constituent. A sample of abietic acid, prepared by Maly's method, gave, after the second crystallization, the following result on combustion.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.