This text, now published in the seventh edition with Sanford as co-author, has for many years served a useful purpose in courses of laboratory instruction as a text and in clinical laboratories as a guide. It ranks with other American texts, such as that of Cummer, in the choice and extent of material presented. The eleven chapters, exclusive of the introductory paragraphs on the use of the microscope, cover adequately routine examinations of the sputum, the urine, the blood, the gastric and duodenal contents, the feces, certain animal parasites, exudates and tissue fluids, miscellaneous examinations, serologic methods, bacteriologic technic and vaccines and biologic tests of the skin. A short appendix is devoted to instructions of a general character, including the preparation of solutions. The subject material is well organized and meets adequately the demands of a text for students and of a guide for clinical laboratories.