149 



AaBC D 



HH' 



Spectrum of egg luteine in chloroform. 



III. Butyro-luteine. 



1. Butter is digested with chloroform and filtered, 

 Three bands. 



AaBC D 



Eb 



HH' 



Spectrum of butyro-luteine in chloroform. 



2. Dried by heat and filtered hot. Three bands, 

 fainter when heated; third only visible when 

 just cooling. 



AaBC 



Eb 



HH' 



Spectrum of butyro-luteine in fused butter. 



IV. Cysto -luteine. 



1. The yellow fluid contained in an ovarian cyst 

 is examined before the spectroscope with the 

 lime light. Three bands in blue will be ob- 



