The fact that this monograph is in its third edition since 1931 is sufficient evidence of its popularity. The author has attempted to portray particularly the pathologic effects of the poisonous gases used in warfare. Twenty-two beautiful colored plates illustrate the clinical and histopathologic effects on the various organs that may be affected. The seven chapters deal with the history and development of chemical warfare, the general toxicology and chemistry of the most common war gases, the specific pathology and therapy of the effects of war gases, and the late effects and the methods and principles used in combating and treating war gas injury. There is an excellent bibliography from both German and foreign literature and a convenient index. This booklet will be of great service to all pathologists who may deal now or in the future with war gas injuries.