BIBLIOGRAPHY 277 



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 on which 

 reference 

 is made 



394. 1887. Engelmann, Th. W., 'Die Farben hunter Laubblatter 



und ihre Bedeutung fiir die Zerlegung der Kohlensaure im 

 Lichte,' Bot. Zlg., Leipzig, 1887, xi.v. pp. 393-398, 409-419, 

 425-436, 441-450, 457-463. 



Investigations on the spectra of various pigments of 

 coloured leaves. That of anthocyanin is found on the 

 whole to be complementary to that of chlorophyll. See 

 text, pp. 7, 35, 56, 129 



395. 1889. Roze, E., 'Contribution a I' etude de I'action de la 



chaleur solaire sur les enveloppes florales,' Bui. soc. bot., 

 Paris, 1889, xxxvi, pp. ccxii-ccxiv. 



The author attempts to arrive at a reason for the great 

 variety of coloration of corollas, perianths, etc. He takes 

 temperature of flowers (differently coloured) which have 

 been exposed to the sun, and finds that some colours absorb 

 more heat than others. He believes this to have a great 

 physiological importance as regards fertilisation, dehiscence 

 of anthers, etc. 



396. 1890. Jumelle, H., 'Sur I'assimilation chlorophyllienne des 



arbres a feuilles rouges,' C. R. Acad. sci., Paris, 1890. cxi, 

 pp. 380-382. 



Less assimilation in red leaves than in green. 



397. 1892. Kny, L., 'Zur physiologischen Bedeutung des Antho- 



C3^ans,' Estratto dagli Atti del Congresso Botanico Inter- 

 nazionale, 1892. 



Account of experiments performed in support of the 

 function of anthocyanin as a screen and as a medium for 

 transforming light rays into heat. pp. 130, 133 



398. 1894. Kerner von Marilaum, A., and Oliver, V.Vf., The Natural 



History of Plants, London, 1894. 



Many references to anthocyanin : 



Morphological distribution in leaves, etc. p. 18 



Development in Alpine plants. pp. 25, 102 



Various physiological functions suggested. p. 128 



Description of autumnal coloration. p. 22 



Development of pigment in rhizomes. p. 28 



399. Wehrli, L., 'Ueber die Bedeutung der Farbung bei den 

 Pflanzen,' Ber. Schweiz. Bot. Ges., Bern, 1894, iv, pp. xxiii- 

 xxviii. 



Scheme for classification of anthocyanin and other pig- 

 ments according to uses. Physiological uses of chief 

 importance. These are classified as (1) protection of 

 chlorophyll, (2) conversion of light into warmth. 



400. Wiesner, J., ' Pflanzenphysiologische Mittheilungen aus 

 Buitenzorg. 2. Beobachtungen iiber Einrichtungen zum 



