Loomis's Essentials of Toxicology, Firth Edition is a fully revised and updated version of this classic introductory volume on the science of harmful biologic effects associated with exposures to chemicals of all types. The scope of this book includes a discussion of the major types of chemicals involved; the general properties of chemicals and biologic systems as they influence the occurrence of detrimental biologic effects; the methods used to demonstrate these effects; and the basis for clinical diagnosis and therapy of harmful effects of chemicals on humans. Individual examples are used to demonstrate each of the principles under discussion.