Kendall's revised bacteriology (Ed. 2) needs little introduction as a reference text to advanced students of bacteriology. As a text for courses in bacteriology to medical students and to students of general bacteriology, it deserves favorable consideration. The revision has brought into the text discussion of certain pathogenic bacteria which during the war became especially important. Entire sections of the book are rewritten and extensive changes or additions made to nearly every chapter. A section discussing gastro-intestinal bacteriology is a distinctive feature of this book.