BIBLIOGRAPHY 247 



Page of text 

 on which 

 reference 

 is made 



Spectroscopic examination of a number of red and blue 

 anthocyanin pigments. Development of spectra after 

 addition of magnesium salts. p. 56 



152. Schnetzler, J. B., 'Ueber Veranderungen des rothen 

 Farbstoffes von Paeonia officinalis unter dem Einfluss 

 chemischer Reagentien,' Bot. CentralbL, Cassel, 1880, i, 

 p. 682. 



Short note on the action of acids, alkalies, iron salts, 

 etc., on anthocyanin. 



153. Schnetzler, J. B., 'Observations sur les matieres 

 colorantes des fleurs,' Bui. Soc. Sci. Nat., Lausanne, 1880, 

 xvn, pp. 96-98. 



Note on reactions of colouring matter of Paeonia 

 flowers. 



154. Schnetzler, J. B., 'Ueber den rothen Farbstoff der 

 Blatter von Ampelopsis hederacea,' Bot. CentralbL, Cassel. 

 1880, I, pp. 247-248. 



Slight note on anthocyanin of Ampelopsis. Reactions 

 with alkalies, etc. 



155. *Schnetzler, J. B., ' De la couleur des fleurs,' Les Mondes, 

 1880, LIII, p. 158. 



Author contradicts the supposition that various flower 

 colours are due to different chemical substances, on the 

 ground that Paeonia anthocyanin gives different colours 

 with various reagents. Statement is made that reddening 

 of leaves in autumn is due to the action of tannin on chloro- 

 phyll, and that chlorophyll is at the basis of all flower 

 pigments. 



156. 1882. Husemann, A., Hilger, A., und Husemann, Th., Die 



Pflanzenstoffe in chemischer, physioloyischer, pharmakolo- 

 gischer und toxikologischer Hinsicht, Berlin, 1882, Bd 1, 

 pp. 259-260. 



Short account of anthocyanin from the chemical point 

 of view. 



157. Maumene, E. J., 'Sur I'cenocyanine,' C. E. Acad. sci., 

 Paris, 1882, xcv, p. 924. 



Green grapes dried in vacuo over sulphuric acid do not 



redden, but, on exposure to air, pigment is rapidly formed. 



Hence conclusion that colouring matter (cenocyanin) is 



' formed from a colourless chromogeii by oxidation and 



possibly hydration. 



158. 1883. Gardiner, W., 'On the general occurrence of Tannins 



in the vegetable cell and a possible view of their physio- 

 logical significance,' Proc. Phil. Soc., Cambridge, 1883, iv, 

 pp. 388-395. 



