31] Stoffaufnahme. 387 



actually utilize in growth bases helcl absorbed by tbe acid, Compounds of the 

 cell-walls. " 



346. Skiniier, J. J. Effect of vanillin as a soll constituent. 

 (Plant World XVIII, 1915, p. 321-330.) - Kef. in Bot. Centrbl. CXXXII. 

 1916, p. 237. 



347. Söderbaum, H. G. Die Wirkung der Ammoniaksalze auf 

 das Wachstum der Gerste. (Kungl. Landtbr.-Akad. Handlingar och 

 Tidskrift LV, Nr. 1/2. 1916, p. 57 66.) - Ref. in Bot. Centrbl. CXXXVII, 

 1918, p. 281-282. 



348. Sorauer, P. Über die Wirkung von Leuchtgas auf die 

 Pflanzen. (Landw. Jahrb. XL VIII, 1915, p. 279-312, 1 Taf., 2 Fig.) - 

 Ref. in Bot. Centrbl. CXXXVIL 1918, p. 84-85. 



349. Spiro, K. Die Wirkung von Wasserstoffsuperoxyd und 

 von Zucker auf die Anaerobier. (Münch. Med. Wochenschr. 1915, 

 p. 497-499.) - Ref. in Bot. Centrbl. CXXXL 1916, p. 408-409. 



350. Stiles, W. On the relation between the concentration 

 of the nutrient Solution and the rate of growth of plants in 

 water culture. (Ann. of Bot. XXIX. 1915, p. 89 — 96.) — Ref. in Bot. 

 Centrbl. CXXIX, 1915, p. 57-58. 



351. Stiles, Walter and Jergensen, Ingvar. Studies in permea- 

 bility. I. The exosmosis of electrolytes as a criterion of anta- 

 gonistic ion-action. (Ann. of Bot. XXIX, 1915, p. 349 — 367. ) — Summary: 

 ,,The exosmosis of electrolytes from plant tissue has been examined in relation 

 to the composition of different external Solutions by means of physical che- 

 mistry methods. Within certain limits it seems reasonable to conclude that 

 the rate of exosmosis is a measure of toxicity. A decrease in this rate when 

 certain ions are added to Solutions containing undoubtedly poisonous ions 

 might be due to the same cause that produces what other investigators have 

 called antagonism. In some instances we have shown that the phenomena 

 are more complex than are generally assumed. We have emphasized the 

 necessity of examining and analysing each case separately. The use of the 

 methods of physical chemistry indicate the possibility of obtaining more 

 definite Information of the laws governing the exchange of substances between 

 the interior and exterior of the cell." 



352. Stiles, Walter and Jörgensen, logvar. Studies in permeability. 

 II. The effect of temperature on the permeability of plant cells 

 to the hydrogen ion. (Ann. of Bot. XXIX, 1915, p. 611-618.) — 

 Summary: ,.1. The absorption of the hydrogen ion of hydrochloric acid in 

 dilute Solution by potato cells takes place according to a simple exponential 

 relation between time and the concentration of the acid. 2. The rate of ab- 

 sorption of these ions by potato cells is increased about 2,2 times for a rise 

 of 10 C between O" C and 30« C." 



353. Stiles, W. On the Interpretation of the results of water- 

 culture experiments. (Ann. of Bot. XXX, 1916, p. 427-436) - Ref. 

 in Bot. Centrbl. CXXXVII, 1918, p. 70. 



354. Stoklasa, J. Über die Abhängigkeit der Resorption des 

 Kaliumions von der Gegenwart des Natriumions im Organismus 

 der Zuckerrübe. (Biochem. Zeitschr. LXXIIL 1916, p. 260-312.) - 

 Ref. in Bot. Centrbl. CXXXIV, 1917, p. 132-134. 



25* 



