Physiologie der Zellen, Gewebe und Organe. 419 



1131) Richet, C, Une race de ferment lactique arsenicophile. In: CR. 

 Soc. Biol. Paris, T. 74, Nr. 22, S. 1252—1254, 1913. 



L'auteur a obtenu en ensemen^ant du ferment lactique dans des Solutions 

 renfermant des doses de plus en plus grandes d'arseniate de potasse une race 

 de ce ferment accoutumee ä l'arsenic ä un tel point qu'elle ne peut plus pousser 

 sans arsenic. II rapproclie ce fait des observations d'Ehrlich et de ses eleves 

 sur Faccoutumance des trypanosomes aux derives arsenicaux. Moreau. 



1132) McCool, M. M., The Toxicity ofManganese and the Antidotal Relations 

 between this and Various Other Cations with Respect to Green Plants. 

 In: Cornell Univ. Agr. Exp. Stat. Memoir, Nr. 2, S. 171—200, 1913. 



Pure Solutions of manganese salts are extremely poisonous to pea and wheat seed- 

 lings. The degree of toxicity is greatly reduced by füll nutrient Solutions and by soil 

 cultures. The injurious action of the manganese ion is manifested mainly toward the 

 tops of plants. Chlorosis of the leaves is the first indication of an overdose of manga- 

 nese. Manganese is less injurious to plants grown in the dark than to those grown in 

 the light. Pearl. 



1133) McCool, M. M., Toxicity of Various Cations. In: Cornell Univ. Agr. Exp. 

 Stat. Memoir, Nr. 2, S. 200—215, 1913. 



Barium, Strontium, ammonium, magnesium, sodium, and potassium, in the order 

 given, when present in pure Solution are very toxic to seedlings. This toxicity is gre- 

 atly reduced by either füll nutrient Solutions or soil cultures. Under the conditions of 

 the esperiments much stronger Solutions are required in order to prevent top growth 

 than to kill the roots of seedlings. Seedlings that have been grown for ten days in 

 either distilled water, tap water, or füll nutrient solutions are far more resistant to any 

 toxicant studied than are those that are placed immediately in the toxic solutions. 



Pearl. 



1134) McCool, M. M., The Antitoxic Action of Certain Nutrient and 

 Non-Nutrient Bases with Respect to Plants. In: Cornell Univ. Agr. 

 Exp. Sta. Memoir, Nr. 2, S. 121— 170, 1913. 



The effect of various nutrient and non-nutrient mineral bases upon the 

 growth of Canadian field peas and wheat was studied. The following are the 

 chief conclusions: Each of the following (in the order given) is poisonous to 

 seedlings: Ba, Sr, NH3, Mg, Na, K. Although mutual antagonism results when 

 cations are present tcgether in Solution as follows 



Mg and Sr Na and K 



K and Sr Na and NH3 



Na and Sr K and Ba 



Mg and Ba 



yet calcium is the most effective of any of the substances studied, in preveuting 

 toxic action. Protective action is not confined to the so-called essential nutri- 

 ents, since, as indicated above. Na, Sr and Ba (the nonessential ions among those 

 here discussed) possess this property. The favorable results obtained from the 

 application of lime to many types of soils is doubtless due in part to the anti- 

 dotal relations. Pearl. 



/ 



1135) Kleemaim, E., Experimentelle Ergebnisse über die Wirkung 

 von Hypopliysenextrakt castrierter und der Corpora lutea be- 

 raubter Tiere. In: Arch. f. Gynäk., Bd. 101, Heft 2, S. 351—361, 1913. 

 Die experimentellen Untersuchungen, zu denen sich der Verf. des im Arch. 

 f. experiment. Path. u. Pharmak., Bd. 63, S. 165 beschriebenen Läwen-Tren- 



27* 



