Neue Litteratur. 51 



JHillig, F. J, 1906. A new case of mutation. (Ohio Nat. VI. p. 448.) 

 [The spontaneous appearance of hereditary white and purple flowered 

 forms of the blue flowered Commelina nudiflora is recorded. — 

 T r e 1 e ase.] 



Hurst, C. C. 1905. Notes on the „Proceedings of the International Con- 

 ference on Plant Breeding and Hybridisation 1902". (Journ. roy. hört. 

 Soc. XXIX. p. 417-433.) 



Krasan, F, 1904 (erhalten 1906). Versuche und Beobachtungen. (Mitt. 

 natw. Ver. Steiermark. 1904. 41. 80 pp.) 



ioew, F. A. 1904 (received 1906). The importance of plant Variation and its 

 bearing upon the evolution of species. (Report Michigan Ac. Sc. VI. 

 p. 84—87.) 



Scliimkewitsch, M. 1906. Die iMutationslehre und die Zukunft der Mensch- 

 heit. V. M. [Forts.] (Biol. Cbl. XXVI. 3. p. 65—76. Schluss folgt.) 



VI. Physiologie. 



Cf. II. Györffy. 



Andre, G. 1906. Sur les variations de l'acide phosphorique et de l'azote 

 dans les sucs des feuilles de certains vegetaux. (C. R. Ac. Sc. Paris. 

 CXLII. 4. p. 226-227.) 

 Armstrong, E. F. 1905. The nature of enzyme action. (Journ. Inst. 



Brewing. XI. 6. and: Chem. News. XCIIl. 2410. p. 48-50.) 

 Bernatsky, J. 1904 (erhalten 1906). Adatok a Ruscus-genusz vegetativ 

 szerveinek ismeretehez. [Zur Kenntnis der Vegetationsorgane der 

 Gattung Ruscus]. (Ann. hist.-nat. Museum nation. hungarici. I. p. 482 

 — 502. Magyarisch und deutsch.) 

 Berthelot. 1906. Nouvelles recherches sur les composes alcalins inso- 

 lubles contenus dans les vegetaux vivants: feuilles de chene. (C. R. 

 Ac. Sc. Paris. CXLII. 4. p. 249—257.) 

 ßogue, E. E. 1905. Annual rings of tree growth. (Monthly Weather 

 Review U. S. Dept. Agric. XXXIII. p. 250—251.) Data of measure- 

 ments on a number of species at Stillwater, Oklahoma, and Agri- 

 cultural College, Michigan, from which a general direct relation is 

 deduced between precipitation and tree growth. — Trelease.] 

 Breazeale, J. F. 1906. Effect of certain solids upon the growth of seed- 



lings in v.ater cultures. (Bot. Gaz. XLI. 1. p. 54 — 63. 4 figs.) 

 Builer, A. H. R. 1906. The enzymes of Polyporus squamosus Huds. (Ann. 



of Bot. XX. 77. p. 49—59.) 

 Clark, A. W. 1904 (received 1906). Regeneration of the epicotyl in seed- 

 lings üf Vicia faba and Pisum sativum. (Rep. Michigan Ac. Sc. VI. 

 p. 80.) 

 Dandeno, J. B. 1904 (received 1906). The relation of mass action and 

 physical affinity to toxicity, with incidental discussion as to what 

 extent electrolytic dissociation may be involved. (Report Michigan 

 Ac. Sc. VI. p. 92.) (Abstract of a paper printed in füll in the Ameri- 

 can Journal of Science. June 1904.) 

 Dhere, Ch. 1906. Sur l'absorption des rayons ultra-violets par l'acide 

 nucleique extrait de la levure de biere. (C. R. Soc. biol. Paris. LX. 

 p. 34.) 

 Ewart, A. J. 1906. The influence of correlation upon the size of leaves. 



(Ann. of Bot. XX. 77. p. 79—82. 2 textfigs.) 

 Fernbach, A. 1906. Influence de la reaction du milieu sur l'activite des 

 diastases. (C. R. Ac. Sc. Paris. CXLII. 4. p. 285.) 



Harper, R. M 1905. A peculiar hygroscopic movement in the capsules 

 of Kneiffia. (Plant World. VIII. 12. p. 301—302. 2 figs.) 



Haynes, J. A. 1904 (received 1906) The angle of devlation from the normal 

 Position at which stems show the strongest geotropic response. (Re- 

 port Michigan Ac. Sc. VI. p. 80—81.) 



Hedden, Mary E. 1904 (received 1906), Conditions influencing regeneration 

 of the hypocotyl in Linum usitatissimum. (Report Michigan Ac. Sc. 

 VI. p. 79.) 



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