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cisely but clearly presented. Step by step the authors show how fundamental principles can be applied to the development of a satisfactory semiquantitative theory of solubility. Appropriate experimental data are frequently introduced, often graphically, to test the theoretical relationships and t o show how they may be applied. The reviewer can find much to praise in this work and but little to criticize adversely. He considers it an excellent contribution t o the scientific literature and is glad to recommend it to all who want a well-written, theoretically sound treatise on the subject. hf.4URICE L. HUGQINS.
BOOKS RECEIVED (to Sovember 2, 1950) HAHN,OTTO. Xew Atoms. Elsevier Publishing Company, Inc., 215 Fourth Ave., Sew York 3. 1950. Price: $1.75. KARRER, P., AND JUCKER, E . Carotenozds. Translated and revised by E. A. Braude. Elsevier Publishing Company, Inc., 215 Fourth Ave., New York 3. 1950. 384 pp. Price: $8.50. KUMN,ROBERT,AND MYERS,ROBERTJ. Ion Ezchange Resins. John Wiley and Sons, Inc., 440 Fourth Ave., New York 16. 1950. 212 pp. Price: $4.75. LONDON, FRITZ. Superfluids. Vol. 1. John Wiley and Sons, Inc., 440 Fourth Ave., S e a York 16. 1950. 161 pp. Price: $5.00. MEYER,K. H. Natural and Synthetic High Polymers. 2nd edition. (High Polymers, Vol. IV). Interscience Publishers, Inc., 215 Fourth Ave., New York 3. 1950. 891 pp, Price: $15.00. MoMMAERTs, W. F. H. 11.Muscular Contraction-A Topic in Molecular Physiology. Interscience Publishers, Inc., 215 Fourth Ave., New York 3. 1950. 191 pp. Price: $4.20. SAXDELL, E. B. Colorimetric Determination of Traces ofkfelals. Vol. 3. 2nd edition. Interscience Publishers, 215 Fourth Ave., New York 3. 1950. 673 pp. Price: $9.00. WHITEHEAD, T . R. A Laboratory Manual of Elementary Chemical Analysis. Ginn and Company, Boston, Massachusetts. 1950. 64 pp. Price: $1.25. WILLIAMS, ROGERJ., EAKIN,ROBERTE., BEERSTECHER, ERNEST,JR.,AND SHIVE,WILLIAM. The Biochemistry of B Vitamins. Reinhold Publishing Corporation, 330 West 42nd St., New York 18. 1950. 741 pp. Price: $10.00. ZART,ARTHUR.Kunatseide and Stapelfaser. D. Steinkopff, Darmstadt, Germany. 1950. 177 pp. Price: unbound, 17.50 DM; bound, 19.50 DM. Annual Review of Physical Chemistry. Vol. 1. Edited by G. K. Rollefson, University of California. Annual Reviews, Inc., Stanford, California. 1950. 382 pp. Price: $6.00. , Handbook of Chemistry and Physics. 32nd edition. Charles D. Hodgman, Editor-in-Chief. Chemical Rubber Publishing Company, 2310 Superior Ave., N. E., Cleveland, Ohio. 1950. 2879 pp. Price: $7.50.
