NOTES 727 



Bot. Petropol. 7 (Sarracenia and Darlingtonia). Goebel : Pflanzenbiologische 

 Schilderungen, 2, Marburg, 1901-03. 



134. Reinke : P.J. 10, 1876. Wille : Beita /.. physiol. Anat. d. Laminariaceen, 

 Christiania, 1897. 



135. De Bary : Vergl. Morph. u. Biol. d. Pilze, Leipzig, 1884, pp. 18 sqq. Von 

 Guttenberg : I.e. [13 J. 



136. Treub : Ann. Buit, 13, 1895. 



[136. I have used the term photosynthesis throughout the translation as the 

 equivalent of " carbon- dioxide assimilation." But cf. Pfeffer's Physiology, 1, 

 p. 302. footnote. ] 



137. Schmitz : Verb. Rheinl. u. Westf. 40, 1881 (Algae). Id. P.J. 15, 1884. 

 N. Pringsheim : P.J. 12, 1S81. Arthur Meyer : Das Chlorophyllkorn, etc., Leipzig, 

 1883. Tschirch : Ber. 1, 1883. A. F. W. Schimper : P.J. 16, 1885. G. 

 Haberlandt : Flora, 1888, and Ber. 23, 1905 (Selaginella). Zimmermann : Beih. 

 Bot. Centr. 4, 1894. Kolkwitz : Festchr. f. Schwendener, Berlin, 1899 (Spirogyra). 

 Senn : Lie Gestalts- u. Lagesveranderungen d. Pflanzen-Chromatophoren, Leipzig, 

 1908. 



138. The literature dealing with the pigments of chloroplasts and other chromato- 

 phores is very extensive. The following compilations and comprehensive treatises 

 may be specially mentioned : Czapek : Ber. 20, 1902 (Gen.-Vers.-Heft). Id. Bio- 

 chemie d. Pflanzen, 1, pp. 449 sqq. 1905. Id. Progressus, 1, 1906. Euler : Grundlagen 

 u. Ergebnisse d. Pflanzenchemie, 1, pp. 191 sqq. Braunschweig, 1908. 



139. Engelmann : B.Z. 1882, 1883 and 1884. Id. Arch. Anat. u. Phys. 1902 

 (cornpl. chromatic adaptation). Timiriazeff : Bull. Congr. int. de bot. a St.-Peters- 

 bourg, 1884. Id. Proc. Roy. Soc. 72, 1903. Gaidukow : Anh. z. Abh. Akad. Berlin, 

 1902, and Ber. 21, 1903 (compl. chromatic adaptation). Stahl : Zur Biologie d. 

 Chlorophylls, Jena, 1909. Stahl's views are opposed by Wiesner (Der Lichtgenuss 

 d. Pflanzen, Leipzig, 1907, pp. 241 sqq.). 



140. Sachs : B.Z. 1862, p. 365. Id. ibid. 1864, p. 289. Godlewski : Flora, 

 1873, p. 378. Boehm : Sitzb. Wien, 69, 1874. Id. B.Z. 1883. Dehnecke : t)b. 

 nichtassimilierende Chlorophyllkorner (Inaug. -Diss.), Bonn, 1880. A. F. W. Schimper : 

 B.Z. 1880, p. 881. Id. P.J. 16, 1885. Stock : Ein. Beitrag z. Kenntnis d. Protein- 

 krystalle (Inaug. -Diss. Tubingen), Breslau, 1892. 



141. Boehm : Sitzb. Wien, 1856. Frank : P.J. 8, 1872. Borodin : Bull. Acad. 

 St.-Petersb. 1868. Stahl : B.Z. 1880 (two papers). A. F. W. Schimper : P.J. 16, 

 G. Haberlandt : Ber. 4, 1886. Senn : I.e. [137]. Lidforss : Lunds Univ. Arsskrift, 

 N.F., 4, 1908. 



142. Recently Senn (I.e. [137 J, pp. 265 sqq.) has attempted to prove experi- 

 mentally, that the accumulation of chloroplasts on those cell-walls which abut 

 against intercellular spaces, is not due to the chemotactic influence of carbon dioxide. 

 Even if his views were correct, he has overlooked the fact that the advantage derived 

 from this particular distribution of the chloroplasts consists in the improved carbon- 

 dioxide supply, whatever the cause of the distribution may be. .Senn inclines to 

 the belief, that the preference on the part of the chloroplasts lor the bes1 ventilated 

 portions of the cell-walls is connected with transpiration. 'The chromatophores 

 are attracted to the points of most intense evaporation, owing to the accumulation, 

 in these portions of the walls, of the solid residuum comprising mineral salts and 



