Excerpt from Practical Standardization by Chemical Assay of Organic Drugs and Galenicals Grateful acknowledgement is due to a number of friends who have rendered valuable aid in the task undertaken. The alcoves of the University library at Ann Arbor have been made accessible through the courtesy of Dean A. B. Stevens of the Michigan University School of Pharmacy. Many helpful sug gestions have come from my old colleague on the U. S. P. Revision Committee, Wilbur L. Scoville, who has also done faithful and efficient work in revis ing the proofs. Dr. W. S. Hubbard likewise has rendered similar assistance, and is further to be credited with having been the first to suggest the undertaking by one nearing his four score years of so arduous a task. 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.