Book excerpt: Excerpt from List of Proprietary Substances and Nonfood Compounds The United States Department of Agriculture (usda) prohibits discrimination in its programs on the basis of race, color, national origin, sex, religion, age, disability, political beliefs, and marital or familial status. (not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of large print, audiotape, etc.) should contact the usda Office of Communications at (202) 720 - 2791. 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.