Excerpt from A Study of the Chemistry of the 1928 Pennsylvania Tobacco Crop: Thesis It is thought that the rate at which these processes take place depends upon the presence of excess basic elements, a considerable amount of basic substances in excess of those tied up with inorganic acid radicles. It is generally recognized that a shifting of the PH toward the alkaline side speeds up the processes involved in curing and fermentation. 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.