148 LUTEINE. 



will show the same three bands as the ether 

 solution, but diminished in intensity by heat, 

 and recovering the same appearance when cold. 



AaBC 



Spectrum of egg luteine in alcohol, cold. 

 AaBC D EbF G HH' 



Spectrum, of egg luteine in alcohol, hot. 



2. Ether extract. Prepared similarly; the ether 

 extract shows three bands ,in a slightly different 

 position. 



AaBC 



Spectrum of egg luteine in ether. 



3. Chloroform extract. Digest egg-yelk in chloro- 

 form, filter, and allow to stand till clear. The 

 solution has a fine yellow colour, and in the 

 spectroscope shows three bands. 



