15 



Figure I,2o Carotenes separated by chromatographic adsorption of 

 chloroplast pigments in a colijmn of activated magnesi 

 plus Celite (ls2 by weight),, Pigments adsorbed from 

 petroleum ether and washed with petroleum ether con= 

 taining about 1 per cent acetone,, 



Y+G CHLOROPHYLLS 

 + XANTHOPHYLLS 



-0 /j-CAROTENE 



-Y a- CAROTENE 



