Carbon Assimilation. 
285 
The ethyl alcoholic solution of chlorophyll a is blue green with 
deep red fluorescence, the colloidal solution in water is pure green 
and does not fluoresce. The alcoholic solution of chlorophyll b is 
greener, compared with a it is tinted a little yellow and the fluores¬ 
cence is red with a tinge of brown. 
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The different behaviour of the two chlorophylls on saponifica¬ 
tion has been mentioned previously. Chlorophyll a gives a pure 
yellow and b a red colour both of which change back subsequently 
to green. 
