This book covers laboratory diagnosis in a simple and practical manner. The introductory chapter on the use of the microscope is very apropos. There is a chapter on bacteriologic methods—culture mediums, staining, etc.—and a list of apparatus and a table of findings in important diseases in an appendix. Perhaps these give the book an elementary atmosphere. However, it seems that all of the important methods of laboratory examination have been considered, and enough has been said to make them understood. There are many illustrations and a number of colored plates. References have been purposely omitted. This is a handy book, well suited for students and practicing physicians.