Environmental Control of Plant Growth. Edited by L. T. Evans.

Flora of the British Isles, Illustrations. Part 3. Boraginaceae to Compositae. Drawings by Sybil J. Roles.

The Germination of Seeds. By A. M. Mayer and A. Poljakoff-Mayber.

Chromosome Botany and the Origins of Cultivated Plants. By C. D. Darlington.

Recherches Physiologiques sur le Repos Vegetatif de la Vigne (Vitis vinifera L.): La Dor-mance des Bourgeons et le Mecanisme de sa Disparition. By R. Pouget.

Radiation Induced Chromosome Aberrations. Edited by Sheldon Wolff.

John Clayton, Pioneer of American Botany. By Edmund and Dorothy Smith Berkeley.

The Absorption of Solutes by Plant Cells. By D. H. Jennings.

Woody Flora of Taiwan. By HUI-LIN LI.

The Annual Species of Medicago. By Chaia Clara Heyn.

The Flowering Process. By Frank B. Salisbury.

General Microbiology. By Roger J. Stanier, Michael Dudoroff and Edward A. Adelberg.

The Biochemical Approach to Life. By F. R. Jevons.