No. 1, November, 1921] • PHYSIOLOGY 41 



PHYSIOLOGY 



B. M. DuGGAR, Editor 

 Carroll W. Dodge, Assistant Editor 



(See also in this issue Entries 9, 93, 152, 191, 205, 233, 234, 245, 250, 316) 



GENERAL 



252. B[lackman], V. H. [Rev. of: Onslow, Muriel Wheldale. Practical plant bio- 

 chemistry, i + 178 p. Cambridge University Press: 1920 (see Bot. Absts. 8, Entry 602).] 

 New Phytol. 20: 43. 1921. 



253. D., C. [Rev. of: Eichwald, E., und A. Fodor. Die physikalisch-chemischen 

 Grundlagen der Biologic. (The physico-chemical bases of biology.) 5iO p., i/9^^. J. Sprin- 

 ger: Berlin, 1919. Price, unbound, M. 42.] Zeitschr. Phys. Chem. 94: 507-508. 1920.— 

 It appears that although the general field of physical chemistry is covered by the book, topics 

 of biological interest are treated at relatively greater length. The reviewer questions the 

 advisability of including a chapter on the infinitesimal calculus, though believing that its 

 usefulness can not be predicted in advance. The whole treatment is considered to be in 

 refreshing contrast to that in the usual text books, and, although vague in places, it is judged 

 a good and useful work. — H. E. Pulling. 



254. Freundlich, H. [Rev. of: Ostwald, Wo. Die Welt der vernachlassigten Dimen- 

 sionen. (The world of neglected dimensions.) 3rd. ed., 222 p. Theodor Steinkopf: Dresden 

 and Leipzig, 1919. Price M. 9.] Zeitschr. Phys. Chem. 94: 506. 1920.— Although the 

 reviewer disagrees with the author on many points and would place his emphasis differently 

 in many cases, he heartily commends the book. It is stated that while the work is enter- 

 tainingly written and presents colloid chemistry from an attractive point of view, one misses 

 the information that might properly be expected in an "introduction," which the book 

 purports to be. — H. E. Pulling. 



255. Harden, A, [Rev. of: Bertrand, G., and P. Thomas. Practical biological chem- 

 istry. Translated from the third edition by H. A. Colwell. xxxii + 348p. G. Bell and Sons: 

 London, 1920.] Nature 107: 390. 1921. — The reviewer considers this book of much value to 

 students and especially to teachers of biochemistry. — 0. A. Stevens. 



DIFFUSION AND OTHER PHYSICAL PHENOMENA 



256. Harris, J. A., R. A. Gortner, and J. V. Lawrence. On the differentiation of the 

 leaf tissue fluids of ligneous and herbaceous plants with respect to osmotic concentration and 

 electrical conductivity. Jour. Gen. Physiol. 3: 343-345. 1921. — The osmotic concentration 

 shown by freezing point lowering. A, of sap from tissues of ligneous plants is materially higher 

 than that of herbaceous plants. The specific electrical conductivity, K, is materially lower. 



The ratio — is about 90 per cent higher in herbaceous than in ligneous plants. Material 



A 



from the Arizona desert, the Jamaica rain forest, and Long Island give concordant results. — 

 E. L. Proebsting. 



257. Loeb, Jacques. Chemical and physical behavior of casein solutions. Jour. Gen. 

 Physiol. 3: 547-555. 1921. — Experiments with casein show that, as with gelatin and crys- 

 talline egg albumin, the forces determining the combination between proteins and acids or 

 alkalies are the same forces of primary valency which also determine the reaction between 

 crystalloids and acids and alkalies. Valency and not the nature of the ion determines the 

 effect on the physical properties of the protein. — Otis F. Curtis. 



