9] Verschiedenes 265 



6. The optinium condition for sugar secretion is an alternation of low and 

 high temperatures. 7. Variation of atmosplieric pressure has no marked 

 influence on secretion. 8. Sugar excretion is markedly diminished in darkness 

 on account of limitation of the food reserves of the plant. Water excretion 

 may or may not continue, depending lipon the species. Removal of the leaves has 

 the same deterrent effect. 9. The more favorable all conditions for growth and 

 the more vigorous the plant, the greater is the amount of sugar secreted. 

 10. Nectar is most aboundant early in tlie blooming season, other things 

 heing equal. 11. Accumulation and secretion of sugar is most pronounced 

 near the time of the opening of the flower.' 4 



74. Klebs, G. f. Übe r das Verhalten der Farnprothallien 

 gegenüber Anilinfarben. (Sitzgsber. Heidelberger Akad. d. Wiss., 

 Math.-naturw. Kl. B. Biolog. "Wiss., 18. Abb., 1919, 21 pp.) — Siehe „Pteri- 

 dophyten 1919" Nr. 6. 



75. Kylin, H. Über die Fu cos anblasen der Phaeophy- 

 ceen. (Ber. D. Bot. Ges. 86, 1918, p. 10—19.) — Ref. in Bot. Ctrbl. 140. 

 1919, p. 120. 



76. Lesage, Pierre. Sur la stabilisation de caracteres 

 d ans 1 e s p 1 a n t e s s a 1 e e s. (Compt. Rend. Acad. Sei. Paris CLXVIII. 

 1919, p. 1003—1005, ill.) 



77. Licent, E. Sur 1 ' e m p 1 o i , c o m m e fixateur, des m e 1 a n - 

 g e s de formol et de composes chroraiques. (Compt. -Rend. 

 Acad. Sei. Paris CLXX, 1920, p. 1518—1521.) 



78. Miller. Edwin C. Daily Variation of water and dry matter 



in the leaves o f com and the s o r g h u m s. ( Journ. Agric. Res. 10, 

 1917, p. 11 — 45.) — The results indicate that under the conditions of these ex- 

 periments the Sorghums and, more particularly, milo can absorb water from 

 the soil and transport it to the leaves more rapidly in proportion to the loss 

 of water from the plant than can corn. As a result of this ability, the 

 sorghums can produce more dry matter for each unit of leaf area under severe 

 climatic conditions than the corn plant. 



79. Miranda, J.-Gr. Valle. Recherches b iochimiques sur 1 e Pro- 

 teus vulgaris Hauser. Comparaison des proprietes d ' u n e 

 r a c e pathogene et d'une r a c e s aprophyt e. (Compt. Rend. Acad. 

 Sei. Paris CLXVI, 1918, p. 184—187.) 



80. Mirande, Marcel. Sur 1 a metachromatine et 1 e clion- 

 driome des Ohara. (Compt. Rend. Acad. Sei. Paris CLXV, 1917, p. 641 

 bis 643.) 



81. Moeller, W. Rhythmische Strukturen in Gelatine-Salz- 

 Gallerten. (Ztschr. Kolloide 20, 1917, p. 242.) — Ref. in Ctrbl. Biochem. 

 Biophysik 19, 1918, p. 515. 



82. Moliseh, H. Das Chlorophyllkorn als R e du k t i o ns o r g a n. 

 (Sitzber. Akad. Wien, Math.-naturw. KL, Abt. 1, 1918.) — Ref. in Bot. Ctrbl. 141, 

 1919, p. 150—151. 



83. Nicolas, G. U n c a s tres c u r i e u x de reaction chez u n e 

 •o rang e. (Bull. Soc. Hist. Nat. Afr. Nord X, 1919, p. 32—34 ill.) 



84. Rasch, W. I) e m onstration a u s 1 ä ndischer Speiseboh- 

 nen, d a r u n t e r die Rangoo n b ohne „Phaseolus lunatus", die Blau- 

 säure enthält. (Ber. D. Bot. Ges. 37, 1919., p. 414. ) 



