Principles of Animal Biology

on the polarograph, isotopes, sulfa drugs, metabolic antagonists and antibiotics, Warburg tissue slice technique, theory and practice of photometric analysis, and electrophoretic fractionation of the plasma proteins. This book will continue to serve a valuable function as a reference text and guide to laboratory techniques and quantitative analytical methods, since in it may be found a description of a majority of the available biochemical methods. Some of the discussions presented in certain fields, e.g., intermediary metabolism, are not adequate treatments and, on the basis of their relative importance, deserve a larger portion of the total pages. The apparent imbalance of the distribution of space among various subjects may be due, in part, as in the case of many textbooks, to the special interests of the individual authors. Although the authors have made an effort to delete obsolete tests and methods, or those of minor importance, the volume still retains many qualitative and quantitative procedures which are of doubtful value in present-day practical physiological chemistry. A more critical selection of fewer methods would have reduced the size of the volume even while making available space for a more adequate discussion of the theoretical aspects of certain topics. That this has not been done is somewhat unfortunate in view of the obvious effort and cost which have been expended in producing a book of handsome appearance and excellent format. The appendix includes a new section on the composition of foods. -ABRAHAM WHITE