As the author states in the preface, the purpose of his book is not to offer a review of normal and pathologic physiology or clinical symptomatology, but to summarize for the students in a practical way the underlying processes responsible for the corresponding clinical and laboratory observations. An attempt to elucidate complicated scientific problems has been intentionally dropped. As the book is to serve merely as an introduction to the study of pathologic physiology and is not competing with more exhaustive works, bibliographic references are omitted. The text is subdivided into chapters on special organic metabolism, vitamins, hormones, total metabolism, mineral and water metabolism, formation of sediments and stones, blood, pigments, respiration, circulation, urinary organs, digestion, the nervous system, thermoregulation, infections, immunity and allergy. One finds a few omissions which for completeness should be included; for instance, bacteriophage and the patch test for allergy. The book is thoroughly modern, covering