Physiology and Biochemistry of Bacteria. Volume III: Effects of Microörganisms upon Environment. Fermentative and Other Changes Produced. By R. E. Buchanan, Ph.D., Professor of Bacteriology and Bacteriologist of the Iowa Agricultural Experiment Station, Iowa State College, and Ellis I. Fulmer, Ph.D., Professor of Biophysical Chemistry, Department of Chemistry, Iowa State College. Cloth. Price, $7.50. Pp. 575. Baltimore: Williams & Wilkins Company, 1930.
These two volumes present an extensive compilation of the literature relating to the physiology of micro-organisms. Volume II deals with the effect of the physical and chemical environment. It presents first of all certain laws relating to rates of reaction. This is followed by sections on the effects of temperature on morphology, metabolism and the various phases of growth and death rates of micro-organisms, the effects of rays and emanations, mechanical pressure, osmotic pressure, surface tension and other physical environments. The section dealing with the chemical environment takes