Books Reveived

World Distribution of Spirochetal Diseases. 2. Relapsing Fevers Louse-borne and Tick-borne, by Department of Medical Geography, American Geographical Society. New York: American Geographical Society, 1955. $1.25 folded, $1.50 flat.

The Zoonoses in Their Relation to Rural Health, by Karl F. Meyer. 49 pp., illustrated. Berkeley, California: University of California Press, 1955. $1.00.

Laboratory Identification of Pathogenic Fungi Simplified, by Elizabeth L. Hazen and Frank Curtis Reed. 108 pp., illustrated. Springfield, Illinois: Charles C Thomas, 1955. $5.50.

Origins of Resistance to Toxic Agents, Proceedings of the Symposium held in Washington, D. C., March 25–27, 1954, edited by M. G. Sevag, Roger D. Reid, and Orr E. Reynolds, with 28 contributors. 471 pp. New York: Academic Press, Inc., 1955. $12.00.

Identification of Enterobacteriaceae, by P. R. Edwards and W. H. Ewing. 179 pp. Minneapolis Burgess Publishing Co., 1955. $4.00.

Joint FAO/WHO Expert Committee on Nutrition, Fourth Report. World Health Organization: Technical Report Series, 1955, no. 97, 58 pp. New York: Columbia University International Documents Service. $0.60.