Neue Litteratur. 117 



Klein, E. J. 1917. Die freunddienliche Zweckmässigkeit. (Arch. Inst. 



Luxembourg. N. S. VII. p. 61—86.) 

 Koch, L. 1918. Onderzoekingen betreffende de praktijkwaarde van 



de lijnen-selectiemethode voor verschillende eenjarige landbouw- 



gewassen [slot]. (Teysmannia. XXIX. p. 165—191.) 

 Lebedinsky, N. 1918. Darwin 's geschlechtliche Zuchtwahl und ihre 



arterhaltende Bedeutung. (Basel 1918. 8°. 31 pp.) 

 Lotsy, J, P. 1918. Mutatie of kruisinsr, de oorzaak der evolutie? 



(Nederl. Tijdschr. Geneesk. 1918. 2. 17. p. 1395—1404.) 

 Lubosch, W. 1918. Der Akademiestreit zwischen Geoffrey St. -Hi- 

 laire und Cuvier im Jahre 1830 und seine leitenden Gedanken. 



(Biol. Zbl. XXXVIII. p. 357-384. Forts, folgt.) 

 Meunissier, A. 1918. Experiences genetiques faites ä Verrieres. (Bull. 



Soc. nation. Acclimat. France. 1918. p. 1 — 31. 6 f.) 

 Neethiing, J. H. 1918. A preliminary note on dwarfs appearing 



in orluyas early (wheat) hybrids. (S. afric. Journ. Sc. XIV. p. 



540-547. 6 f.) 



VI. Physiologie. 

 Cf. II. Holmes; IV. Minnaert. 



Appleman, C. 0. 1918. Respiration and catalase activitv in sweet com. 



(Amer. Journ. Bot. V. p. 207—209. 1 f.) 

 Baijet, H. 1918. Sur la localisation des glucosides actifs dans les 



feuilles du senre Digitalis. (Schweiz. Apoth. Ztg. LVI. p. 248—250, 



262—263. 1 f.) 

 Blodgett, F. H. 1918. Weather conditions and crop diseases in Texas. 



(Mem Torrey bot. Club. XVII. p. 74-78.) 

 Cannon, W. A. 1917. Relation of the rate of root growth in seedlings 



of Prosopis velutina to the temperature of the soil. (Plant World. 



XX. p. 320-333. 3 f.) 

 Chick. H. and M. Hume. 1917. The distribution in Wheat, Rice and 



Maize grains of the substance the deficiency of which in a diet 



causes Polyneuritis in Birds and Beri-beri in Man. (Proc. r. Soc. 



London. B. XC. p. 44- 60.) 

 Chick, H. and M. Hume. 1917. The effect of exposure to temperatu- 



res at or above 100° C upon the substance (Vitamine) whose defi- 

 ciency in a diet causes Polyneuritis in Birds and Beri-beri in 



Man. (Proc. r. Soc. London. B. XC. p. 60-68.) 

 Cockerell, T. D» A. 1918. The growth of Conifers. (Nature. C. p. 426.) 

 Combes, R. 1918. Recherches biochimiques experimentales sur le röle 



physiologique des glucosides chez les vegetaux. I. Etüde prelimi- 



naire [suite]. (Rev. gen. Bot. XXX. p. 283—300, 321—332. ill. 



A suivre.) 

 Duggar, B. M. and W. W. Bonus. 1918. The effect of Bordeaux mix- 



ture on the rate of transpiration. (Ann. Missouri bot. Gard. V. 



p. 153—174.) 

 Estreicher, E. 1917. Ueber Kälteresistenz und den Kältetod der 



Samen. (Bull, intern. Ac. Sc. Cracovie. B. 1914 [1917]. p. 844—879.) 

 F. F. B. 1918. The green leaf, its scientific and economic exploita- 



tion. (Nature. C. p. 464—467.) 

 Ffgdor, W. 1918. Zur Kenntnis des Regenerationsvermögens von 



Crassula multicava Lern. (Ber. deutsch, bot. Ges. XXXVI. p. 241 — 



246. 1 T.) 

 Gerieke, W. F. 1918. Effects of rest and no-rest periods upon growth 



of Solanum. (Bot. Gaz. LXV. p. 344—353.) 

 Haasis, F. W. 1917, Comparative length of growing season of ring- 



