Simply and clearly written and stripped of superfluous verbiage, this is an admirable short treatise on infectious disease. The first hundred-odd pages deal well with general matters, such as infection and resistance, allergy, serum reactions, transmission, general principles of diagnosis, and epidemiology. These sections should be particularly useful. The descriptions of individual diseases are vivid and adequate, and the excellent color photographs of eruptions, bacterial cultures, etc., add greatly to the value of the text. As is usual with the British, a note of conservatism is sounded here and there; in therapy stress is placed on that which has been thoroughly tried and found useful.