Experimental Chemotherapy, Volume I, attempts to condense the existing knowledge in the broad field of experimental chemotherapy in a comprehensive form. The arrangement of the subject matter follows a plan by which the not always avoidable repetitive description is reduced to a minimum. In most of the protozoan and metazoan infections it appeared advantageous to discuss the different series of active compounds according to the specific diseases and their causative agents. In other cases, owing to the wide range of activity of certain antibacterials, the material is arranged according to the groups of compounds. This first volume deals with infections caused by parasites, both protozoan and metazoan; it also contains general chapters on history of chemotherapy, toxicology, statistics, and drug resistance. It is hoped that the treatise will be useful to experimental workers engaged in the search for new chemotherapeutic remedies and in the study of their mechanism of action; to all who are involved in the teaching of pharmacology and therapeutics; and to physicians and veterinarians interested in the experimental basis of the drugs they are using.