This issue of the Handbuch reaches a high level of attainment. Rocha Lima's fine article on verruga peruviana and Oroya fever is followed by Lauda's comprehensive discussion of the animal infections with Bartonella. Lauda recognizes nine species of Bartonella, including the human form (Bartonella bacilliformis). The major portion of the issue is taken up with Otto and Munter's masterly article on typhus, which is of great value to all students of this disease. Breinl's article on Rocky Mountain spotted fever is also excellent. Still another rickettsia infection, trench fever or five-day fever, is dealt with in this issue, and the number concludes with a summary of what is known about the agency of the louse in disseminating infection, with emphasis on the biologic relations of these "minor horrors of war."