There are some excellent general reference works in toxicology, including Casarett and Doull’s Toxicology, 6th, edition, edited by Klaassen; a 13-volume Comprehensive Toxicology, edited by Sipes, Gandolfi, and McQueen; as well as many specialized monographs on particular topics. However, the scarcity of textbooks designed for teacher and student to use in the classroom setting that impelled us to produce the first and second editions of this work is still apparent. With the retirement of Dr. Levi, a mainstay of the first two editions, and the continuing expansion of the subject matter, it seemed appropriate to invite others to contribute their expertise to the third edition. All of the. | Modern Toxicology Third Edition Edited by Ernest Hodgson PhD A TEXTBOOK OF MODERN TOXICOLOGY THIRD EDITION Edited by Ernest Hodgson Department of Environmental and Biochemical Toxicology North Carolina State University ATAWILEY-viy INTERSCIENCE A JOHN WILEY SONS INC. .