This is the first volume of a treatise on "Materia Medica and Therapeutics." It includes a consideration of the historical development of materia medica and pharmacology, the general principles of pharmacology, the forms of administration of drugs, the routes of administration, the technique of prescription writing, and a table of drug preparations and doses. Following this preliminary material there is the first section of systematic therapeutics which will be continued presumably in subsequent volumes. This section deals with parasites, both external and internal, and their remedies. The book is written in Spanish and reflects the viewpoint of the Argentine authors. If the volumes completing the set follow the example of the first volume, it would appear to be a useful reference as to therapeutics (more so than as to pharmacology) for the Spanish-speaking physician.