No. 2, September 1920] PHYSIOLOGY 293 



2242. Maqubnnb, L., and E. Demoussy. Sur la distribution et la migration du cuivre 

 dans les tissus des plantes vertes. [The occurrence and translocation of copper in the tissues 

 of green plants.] Compt. Rend. Acad. Sci. Pun's 170:87-93. 1920. — Chemical analyses were 

 made of various parts of 27 types of cultivated herbaceous and woody plants and in some 

 cases of the expressed sap of such parts with a, view to determining the amount of copper 

 present. The cupro-zinc-ferrocyanid method was employed, 3 grams of dry vegel able matter 

 being used for each test. Copper is found to be present in all plants tested and in all the parts 

 which were analyzed. The amount varies from 0.25 mgm. per liter of centrifuged expressed 

 sap of potato to 40 mgm. per kilogram of dry leaf substance of lettuce. Copper is found in 

 greatest abundance in cells which are active in growth or metabolism, hence the authors con- 

 clude that its translocation is controlled by nutritive processes or processes accompanying 

 metabolism. — C.H. andW. K. Farr. 



2213. Winslow, C.-E. A., and Dorothy F. Holland. The disinfectant action of glycerol 

 in varying concentrations. Proc. Soc. Exp. Biol, and Med. 16: 90-92. 1919. — Glycerol in 9 

 per cent solution exerts no appreciable effect upon the viability of Bacillus culi, but in 

 strengths of 2S-100 per cent there is a progressively increasing "disinfecting" action, nine- 

 tenths of the bacteria being killed in 3 hours at 100 per cent. — R. W. Webb. 



2244. Wogltjm, R. S. Is it safe to fumigate while trees are in bloom? California Citro- 

 graph 5 : 190. 1 fig. 1920.— See Bot. Absts. 5, Entry 1788. 



MISCELLANEOUS 



2245. Bancroft, Wilder D. The colors of colloids. II. Reflection and refraction. Jour. 

 Phys. Chem. 23: 1-35. 1919. III. Reflection and visibility. Ibid. 23: 154-185. 1919. IV. In- 

 terference and diffraction. Ibid. 23: 253-282. 1919. V. Metallic and vitreous lustre. Ibid. 

 23: 289-347. 1919. VI. Blue eyes. Ibid. 23: 356-361. 1919. VII. Bluefeathers. Ibid. 23: 

 365-414. 1919. VIII. Metallic colors. Ibid. 23: 445-468. 1919. IX. Colloidal metals. Ibid. 

 23:554-571. 1919. X. Glasses and glazes, /bid. 23 : 603-633. 1919. XI. Gems. Ibid. 23: M0- 

 644. 1919. — This is a collection of excerpts and abstracts, which includes numerous examples, 

 some biological, chiefly from standard works, on the physical optics of the phenomena incom- 

 pletely indicated by the sub-titles. — H. E. Pulling. 



2246. Bancroft, Wilder D. [Rev. of: Alexander, Jerome. Colloid chemistry. An 

 introduction with some practical applications. 17 x 12 cm., vi+90 p. D. Van Nostrand Co.: 

 New York, 1919.] Jour. Phys. Chem. 23: 441-442. 1919. 



2247. Bancroft, Wilder D. [Rev. of : Bechhold, H. Colloids in biology and medicine. 

 Translated by J. G. M. Bullowa. 24 x 16 cm., xiv+464 p. D. Van Nostrand Co. : New York, 

 1919.] Jour. Phys. Chem. 23: 513-515. 1919.— "It is a great pleasure to welcome an English 

 translation of this excellent book." — Reviewer's summary. 



2248. Bancroft, Wilder D. [Rev. of: Ostwald, Wolfgang. A handbook of colloid 

 chemistry. (Translated by M. H. Fischer with notes added by Emil Hatschek.) 2nd ed., 

 14x17 cm., xvi+284 p. P. Blakiston's Son & Co.: Philadelphia, 1919.] Jour. Phys. Chem. 

 23 : 364. 1919. — With a few exceptions, chiefly notes on the viscosity of colloids, the volume is 

 the same as the first edition and does not represent the present knowledge of the subject.— 

 //. E. Pulling. 



2249. Bancroft, Wilder D. [Rev. of: Prideaox, E. B. R. The theory and use of 

 indicators. 22 x 15 cm.,ix+375 p. D. Van Nostrand & Co. : New York, 1918.] Jour. Phys. 

 Chem. 23: 203-204. 1919. 



2250. Bancroft, Wilder D. [Rev. of: Willows, R. S., and E. Hatchek. Surface 

 tensionand surface energy. 2nded., 19 x lScm.,viii+114p. P. Blakiston's Son & Co. :Phila- 



