316 



INDEX OF SUBJECTS 



crystalline xanthophyll of Willstat- 

 ter, 45; to egg yolk xanthophyll, 45, 

 139. 



Xanthophyll (3 of Kohl, not true xan- 

 thophyll, 44. 



Xanthophyll (3 of Tswett, blue color 

 reaction of alcoholic solution of with 

 HC1, 33, 229; relation of to crystal- 

 line xanthophyll, 45. 



Xanthophyll in brown sea-weed, 96; 

 in red sea weeds, 102, 122. 



Xanthophyll in egg yolk, 15, 138-140; 

 composition and properties of, 174; 

 isomerism of with plant xanthophyll, 

 176, 180; method of isolation of, 173, 

 174, 209-215; origin of, 139, 197, 268; 

 relation of to xunthophyll a, 45, 139, 

 151; variation in melting point of 

 from plant xanthophyll, 175. 



Xanthophyll cry.-t.-ils. color and form 

 of, 236; color reactions of, 237; odor 

 of during oxidation, 237; properties 

 of, 224, 236-238; solubility of, 

 237. 



Xanthophyll series of pigments ac- 

 cording to Kohl, 38, 141; according 

 to Schunck, 38, 40, 41; according to 

 ^Tschirch. 37, 38. 



Xanthophyll solutions, properties of, 

 224-229; relative color of compared 

 to carotin. 22.">. 



Xanthophylls, effect of acids on alco- 

 holic solutions of, 40, 41, 228, 229; 

 method of separation of by chroma- 

 tographic analysis, 226-228; micro- 



chemical identification of in plant 

 tissues, 241, 242; separation of from 

 carotin, 252, 253. 



Xanthophylls a' and a", distinguish- 

 ing properties of, 228, 229. 



Xanthophylloids of Lubimenko, 20. 



Xanthophyll-rich food, effect of on 

 color of butter, 192. 



Yam, autumn pigments of, 58. 



Yellow Day Lily, carotinoids in, 73. 



Yellow carotin, properties of from 

 Crustacea, 164. 



Yellow corn, effect on color of butter 

 of feeding to cows, 191, 271 ; probable 

 effect of feeding to cows on vitamin- 

 content of butter, 271. 



Yellow xanthophyll of Sorby, iden- 

 tity of with Tswett's xanthophyll 

 3, "44. 



"\ ew, autumn pigments of, 59; aril, pig- 

 ments of, 86; leaves, carotin content 

 of, 249. 



Y. Xanthophyll, 41, 42, 70; blue color 

 reaction of with acids, 42. 



Z( a mays, 87. 



Zoonerythrine, as red pigment in bird 

 feathers, 143; in Crustacea, 162, 165; 

 in echinoderms, 166; in fish skins, 

 146; in fish livers, 148; in molluscs, 

 167; in salmon muscle, 148; relation 

 of to rhodophane, 143, 148. 



Zoorubin, as red non-carotinoid in bird 

 feathers, 143. 



