212 Botanisches Centralblatt. 



Regaux, F. 1911. La Substitution equivalentaire des bases dans 

 Talimentation vegetale. (Journ. Soc. centr. Agric. Belgique. LV7II. 

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Rufz de Lavison, J. de 1911. Recherches sur la penetration des 

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 (Ann. Sc. nat. 9. Ser. Bot. XIV. 1/3. p. 97—192.) 



Steinbrinck, C. 1911. Ueber die Ursache der Krümmungen einiger 

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 bot. Ges. XXIX. 6. p. 334—347. 2 Fig.) 



Stoward, F. 1911. A research into the amyloclastic secretory capa- 

 cities of the embryo and aleurone layer of Hordeum with special 

 reference to the question of the vitality and auto-depletion of the 

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Thornber, J. J. 1911. Plant Acclimatization in Southern Arizona. 

 (Plant World. XIV. p. 15—23.) [The object of this paper is to give 

 the names of plants which have been found not to endure the 

 climatic conditions of desert Arizona, while incidentally many 

 important facts are mentioned concerning the factors concerned 

 in the introduction of drought resistant plants in general. — 

 J. W. Harshberger.] 



Tiemer, J. 1911. Neue Befunde im Blut und im Pflanzensaft. Biolo- 

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Transeau, E. N. 1911. Apparatus for the stud)^ of comparative 

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Usher, F. L. and J. H. Priestley. 1911. The mechanism of carbon 

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 p. 101 — 112. 2 flg.) 



Wagner, A. 1911. Die Lebensgeheimnisse der Pflanze. Eine Ein- 

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 Thomas, o. J. [1911]. kl. 8". 190 pp. 36 Abb.) 



Wheldale, M. 1911. On the direct guaiacum reaction given by plant 

 extracts. (Proc. r. Soc. London. B. LXXXIV. 569. p. 121—124.) 



Wiesner, J. von 1911. Ueber aphotometrische, photometrische und 

 pseudophotometrische Blätter. (Ber. deutsch, bot. Ges. XXIX. 6. 

 p. 355-361.) 



Willstätter, R. und M. Utzinger. 1911. Ueber die ersten Um- 

 wandlungen des Chlorophylls. (Ann. der Chem. CCCLXXXII. 2. 

 p. 129- r94.) 



Zaieski, W. und A. Rosenberg. 1911. Zur Kenntnis der Rolle 

 der Katalase in den Pflanzen. (Biochem. Zschr. XXXIII. 1/3. p. 1 — 15.) 



Zon, R. and H. I. Graves. 1911. Light in relation to tree growth. 

 (Bull. 92. Forest Service, U. S. Dept. Agric. 1911.) 



Vn. Palaeontologie. 



Arber, E. A. N. 1911. Compulsory Latin diagnoses for fossil plants. 

 (Nature. LXXXVI. 2168. p. 380—381.) 



Berry, E. W. 1911. A revision of several genera of gymnosper- 

 mous plants from the Potomac group in Maryland and Virginia. 

 fProc. U. S. nation. Mus. XL. p. 289—318.) 



Berry, E. W. 1911. A study of the Tertiary Floras of the Atlantio 



• and Gulf coastal piain. (Proc. Am. Philos. Soc. L. p. 301—415. taf. 

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Berry, E. W. 1910. Additions to the pleistocene flora of New 

 Jersey. (Torreva. X. p. 261—267. 2 fig.) 



Berry, E. W. i911. The Age of the type exposures of the Lafayette 



