110 CRUENTINE. 



three bands. Shaking with air re-oxydises it, and 

 restores the former spectrum. 



AaBOD EbF G HH 



Spectrum of reduced cruentine. 



6. Treat the chloroform solution obtained in 2 

 with hydrochloric acid and water. "Warm the solution 

 till clear. The spectrum will show three bands. Add 

 excess of ammonia and warm. The three bands are 

 unaltered. 



A a EC 



Hydrochloric product of fluorescent cruentine. 



7. Boil the flakes obtained in 1 with much alcohol 

 and filter hot. On cooling red flakes will be deposited. 

 Filter, wash with alcohol, and dissolve them in dilute 

 hydrochloric acid, and observe spectrum of two bands. 



AaBCD EbF G HH 



Spectrum of cruentme Irydrochlorate. 



