174 PHYSIOLOGY [Bot. Absts. 



1207. Osterhout, W. J. V. Antagonism between alkaloids and salts in relation to permea- 

 bility. Jour. Gen. Physiol. 1: 515-519. 1919. — The alkaloids studied were nicotine, caffeine, 

 and cevadine. Nicotine antagonizes the action of NaCl by inhibiting the fall of resistance 

 which occurs in pure NaCl. Caffeine gives similar results. The tissues (Laminaria) die in 

 cevadine in eighteen hours or less. In the case of caffeine (0.01-0.04 M) and of cevadine sul- 

 fate (0.0006-0.0025 M) a distinct decrease in permeability was found, followed by an increase. 

 Nicotine gave a visible precipitate when added to water. — J. M. Brannon. 



WATER RELATIONS 



1208. Holmes, M. G. Observations on the anatomy of ash-wood with reference to water- 

 conductivity. Ann. Bot. 33:255-264. Fig. 1-7. 1919.— See Bot. Absts. 3, Entry 1109. 



MINERAL NUTRIENTS 



1209. Calvino, Mario. Alta horticultura, las inyecciones interorganicas en las plafltas. 

 {Inorganic injections in plants.] Revista Agric. Com. y Trab. 2: 2S7-2S8. 7 fig. 1919. — See 

 Bot. Absts. 3, Entry 1060. 



METABOLISM (GENERAL) 



1210. Appleman, Charles O. Action of neutral salts on acid inversion of cane sugar. 

 [Rev. of: Lebert, M. Action des sels neutres sur l'inversion du Sucre par les acides. Rev. 

 Gen. Bot. 30: 241-244. 1918.] Bot. Gaz. 67: 98-99. Jan., 1919. 



1211. Appleman, Charles O. Effect of different oxygen pressures on carbohydrate me- 

 tabolism of sweet potatoes. [Rev. of: Hasselbring, Heinrich. Effect of different oxygen 

 pressures on the carbohydrate metabolism of the sweet potato. Jour. Agric. Res. 14: 273-284. 

 1918— (See Bot. Absts. 1, Entry 1399).] Bot. Gaz. 67: 99-100. Jan., 1919. 



1212. Appleman, Charles O. Physiological role of glucosides in plants. [Rev. of: 

 Combes, Raoul. Recherches biochemiques experimentales sur le role physiologique des 

 glucosides chez les vegetaux. Rev. Gen. Bot. 30: 226-237, 245-257. 1918. (See Bot. Absts. 

 3, Entry 439).] Bot. Gaz. 67: 101-102. 1919. 



1213. Brown, O. W., and L. L. Carrick. Catalytic preparation of the amidophenols and 

 the phenylenediamines. Jour. Amer. Chem. Soc. 41 : 436^40. 1919. 



1214. Crozier, W. J. Intracellular acidity in Valonia. Jour. Gen. Physiol. 1: 581-583. 

 1919. — The cell-sap of Valonia is much more acid than the sea water in which the plant is 

 living. The acidity of fifty cells varied in individual cases from Ph 5.01 to 6.7. The effect 

 of exposure to darkness could not be detected in the reaction of the sap. Valonia quickly 

 increases the alkalinity in the surrounding medium by abstraction of CO2. There may develop 

 an external alkalinity of Ph 9.5 or greater, but the internal acidity is maintained. It has 

 been previously shown that sap from dead Valonia cells contained S0 4 , while healthy cells 

 do not. In Valonia natural death of a cell consumes some time, the change in the acidity of 

 the cell-sap, paralleled by the change in permeability to SO4, being a gradual process. — /. M. 

 Brannon. 



1215. Fred, E. B., and A. R. C. Haas. The etching of marble by roots in the presence 

 and absence of bacteria. Jour. Gen. Physiol. 1 : 631-638. 1919.— The authors found that the 

 etching power of roots increased in the presence of bacteria. — /. M. Brannon* 



1216. Gertz, Otto. Laboratorietekniska och microkemiska notiser. 3. Om kristallisr- 

 rande bladpigmenter hos Heracleum-arter och hos Strobilanthes Diirianus. [On crystallizing 

 leaf-pigments in species of Heracleum and in Strobilanthes Diirianus.] [Swedish, with Ger- 



