BIBLIOGRAPHY 243 



Page of text 

 on which 

 reference 

 is made 



Cyanus by extracting flowers, and analyses are made of 

 product. Pigment also prepared from Scilla nutans, but 

 more unstable. pp. 8, 47, 58, 59 



123. 1851. Schonbein, C. F., 'Ueber das Verhalten organischer 



Farbstoffe zur schweflichten Saure,' J. prakt. Chem., 

 Leipzig, 1851, LIII, pp. 321-331. 



Pigment of both blue and red flowers bleached by 

 sulphurous acid. p. 55 



124. Schonbein, C. F., 'Ueber die Einwirkung der schwef- 

 lichten Saure auf Blumenfarbstoffe,' J. prakt. Chem., 

 Leipzig, 1851, uv, pp. 76-78. 



Further observations on the bleaching of pigments of 

 flowers and autumnal leaves. 



125. 1854. Filhol, E., ' Observations sur les matieres colorantes des 



fleurs,' C. R. Acad. sci., Paris, 1854, xxxix, pp. 194-198. 

 Observation that white flowers turn yellow with 

 alkalies. Yellow colour destroyed again by acids. Sub- 

 stance which is thus affected is in solution in the cell-sap, 

 is soluble in water and alcohol, and less so in ether. Red 

 flowers turn blue or green with alkalies, the green being 

 due to a mixture of blue and yellow. pp. 8, 10, 47, 49 



126. Fremy, E., uncl Cloez, ' Ueber die Farbstoffe der Blumen,' 

 J. prakt. Chem., Leipzig, 1854, LXII, pp. 269-275. 



An account of the properties of soluble blue (cyanin), 

 red and yellow (xanthei'n) plant pigments. pp. 8, 44, 47 



127. 1855. Martens, 'Nouvelles recherches sur la coloration des 



plantes,' Bui. Acad. roy., Bruxelles, 1855, xxn (1), 

 pp. 157-179. 



Observations upon substances in plants which turn 

 yellow with alkalies (now known to be flavones). Errone- 

 ous suggestion that they form pigment of yellow plastids. 



128. 1856. *Mulder, G. J., Chemie des Weines, Leipzig, 1856. 



129. 1858. Glenard, A., 'Recherches sur la matiere colorante du 



vin,' Ann. chim. phys., Paris, 1858, ser. 3, LIV, pp. 366-376. 

 Preparation and analysis of pigment of wine. See text. 



pp. 8, 58, 59 



130. Glenard, A., 'Ueber den Farbstoff des Weines,' J. prakt. 

 Chem., Leipzig, 1858, LXXV, pp. 317-318. 



Same as previous paper. pp. 8, 58, 59 



131. 1859. Nickles, J., 'Sur la matiere colorante du troe'ne et son 



application a la recherche des eaux potables,' J. pharm. 

 chim., Paris, 1859, xxxv, pp. 328-334. 



An account of the properties and extraction of the 

 pigment of Privet (Liguslrum) berries. Preparation by 

 precipitation with lead acetate, decomposition with 



162 



