276 BIBLIOGRAPHY 



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 on which 

 reference 

 is made 



interest in the present paper are his experiments on the 

 transpiration of differently coloured petals, of which he 

 also examined the spectra. He found that transpiration 

 was greatest in those of which the pigment had absorption 

 bands in the greatest number, width and intensity. He 

 found, in addition, that yellow petals of Hunnemannia 

 fumariaefolia and Eschsdholtzia sp. transpire more in blue 

 light than in yellow, other conditions being equal. The 

 contrary was the case with blue petals of species of Plum- 

 bago, Commelina and Trade scantia. p. 133 



389. 1880. Comes, 0., 'La luce e la traspirazione nolle piante,' 



Mem. Ace. Lincei, Roma, 1880, vn, pp. 55-88. 



An investigation of the effect of light, of various in- 

 tensities and of different colours, on transpiration. See 

 text. p. 133 



390. Comes, 0., 'Influence de la lumiere sur la transpiration 

 des plantes,' C. R. Acad. sci., Paris, 1880, xci, p. 335. 



A short summary of work published in previous papers 

 (Nos. 388, 389). p. 133 



391. 1883. Pick, H., 'Ueber die Bedeutung des rothen Farbstoffes 



bei den Phanerogamen und die Beziehungen desselben 

 zur Starkewanderung,' Bot. Centralbl., Cassel, 1883, xvi, 

 pp. 281-284, 314-318, 343-347, 375-382. 



The author agrees with Wigand that there is a con- 

 nection between the occurrence of red pigment and the 

 presence of tannins. A theory is formulated that the pro- 

 tection from white light, afforded by anthocyanin pigment, 

 facilitates the hydrolysis and transportation of starch, and 

 various evidence is given in support. pp. 21, 35, 131 



392. 1884. Johow, Fr., 'Ueber die Beziehungen einiger Eigen- 



schaften der Laubblatter zu den Standortsverhaltnissen,' 

 Jahrb. wtss. Bot., Berlin, 1884, xv, pp. 282-310. 



Anthocyanin is regarded as a protection for leaves, 

 especially the conducting system, against too intense 

 light. p. 22 



393. 1886. Hassack, C., 'Untersuchungen iiber den anatomischen 



Bau bunter Laubblatter, nebst einigen Bemerkungeiij 

 betreffend die physiologische Bedeutung der Buntfarbung 

 derselben,' Bot. Centralbl., Cassel, 1886, xxvin, pp. 84-85, 

 116-121, 150-154, 181-186, 211-215, 243-246, 276-279, 

 308-312, 337-341, 373-375, 385-387. 



An important histological account of the distribution 

 of anthocyanin in red leaves. Favourable reference is 

 made to the screen theory of anthocyanin, and Kerner's 

 observations are quoted as evidence. pp. 19, 20, 30, 35, 129 



