Aedes aegypti (L); The Yellow Fever Mosquito, by Sir S. Rickard Christophers, C.I.E., O.B.E., F.R.S., I.M.S. (Ret'd). 739 + xii pages, ill. Cambridge, Cambridge University Press (32 E. 57th St., N. Y. 22, N. Y.), 1960. $14.50.

Antibiotics Annual 1959–1960 (7th Annual Symposium on Antibiotics). Henry Welch, Ph.D., and Felix Marti-Ibañez, M.D., editors. 1034 + xx pages, ill. New York, N. Y., Antibiotica, Inc., 1960. $15.00.

Biological Organisation: Cellular and Subcellular (A Symposium), C. H. Waddington, editor, 328 + xviii pages, ill. New York 22, N. Y., Pergamon Press, Inc., 1959. $12.50.

The Origin of Life on The Earth (A Symposium). Edited for the Academy of Sciences of U.S.S.R., by A. I. Oparin, A. G. Pasynskii, A. E. Braunshtein, and T. E. Pavlovskaya. English, French and German edition edited for International Union of Biochemistry by F. Clark and R.L.M. Synge. Vol. I, 691 + xv pages, ill. New York 22, N. Y., Pergamon Press, Inc., 1959. $15.00.

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