246 BIBLIOGRAPHY 



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on which 



reference 



is made 



that red pigment in leaves is produced by the action of 

 light on chlorophyll under circumstances not yet repro- 

 duced. Presence or absence of pigment due to equilibrium, 

 or absence of the same, between constructive and destruc- 

 tive agencies. Colour of flowers due to erythrophyll, and 

 frequently exactly the same as in the leaves. pp. 56, 88 



145. 1875. Bofscow, El., 'Notiz tiber den Polychroismus einer 



alkoholischen Cyaninlosung,' Bot. Ztg., Leipzig, 1875, 

 xxxin, pp. 351-352. 



A hot alcoholic extract was made from flowers of Ajuga 

 reptans and A. pyramidalis, and it was found that the 

 pigment showed continuous changes in fluorescence as 

 the solutions cooled. 



146. 1876. Pellagri, G., 'SulP uso della fillocianina come reattivo,' 



Gazz. chim. ital., Palermo, 1876, vi, pp. 35-38. 



Anthocyanin in dilute solution can be used as a very 

 sensitive reagent for alkalies. p. 54 



147. 1877. Church, A. H., 'Golem,' Ber. D. chem. Ges., Berlin, 1877, 



x (1), p. 296. 



Preparation and analysis of red pigment from leaves 

 and stem of Coleus Verschaffelii. See text. pp. 58, 59 



148. Senier, H., 'The Colouring Matter of the Petals of Rosa 

 gallica,' Pharm. J., London, 1877, ser. 3, vn, pp. 650-652. 



Extraction and analysis of red pigment. Chief point of 

 interest is the preparation of crystalline salts of the pigment 

 with alkali metals. See text. pp. 58, 59 



149. 1878. Gautier, A., 'Sur les matieres colorantes des vins,' 



C. E. Acad. sci., Paris, 1878, LXXXVI, pp. 1507-1510. 



View that plant pigments are formed from colourless 

 tannic acids which redden on oxidation. Preparation and 

 analyses of pigments from wines. It has been shown by 

 later investigators that products were mixtures. See text. 



pp. 9, 58, 60, 106 



150. 1879. Hilger, A., 'Ueber den Farbstoff der Familie der 



Caryophyllinen,' Landw. Versuchstat., Berlin, 1879, xxm, 

 pp. 456-461. 



Investigation of pigments of representatives of orders 

 included under Centrospermae, i.e. Beta, Phytolacca, 

 Chenopodium and Amaranthus. Pigments found to be 

 similar, both as regards spectra and chemical reactions, 

 but to differ from other red and violet pigments. Pre- 

 paration of pigment from Phytolacca, but no analyses. 



151. 1880. Lepel, F. von, 'Pflanzenfarbstoffe als Reagentien auf 



Magnesitimsalze,' Ber. D. chem. Ges., Berlin, 1880, xm (1), 

 pp. 766-768. 



