Contributions to the Chemistry of Chlorophyll. 

 a B C D E F 



Absorption Spectra of Substances described in this Paper. 



1. Product of the action of melting caustic potash on phyllocyanin dissolved in 



alcohol. 



2. The same dissolved in ether. 



3. The same dissolved in concentrated hydrochloric acid. 



4. Phyllocyanin in ether.* 



5. Phylloxanthin in ether. 



6. Product of the action of alkali on phylloxanthin in ether. 



7. The same, dilute solution. 



8. The same dissolved in acetic acid. 



9. Alkachlorophyll in ether. 



10. Product of the action of sulphuric acid on alkachlorophyll in ether. 



11. Product of the action of acetic acid on alkachlorophyll in ether. 



* This spectrum, which has already been figured, is here given again for the sake 

 of comparison with the following one. 



