Absorption Spectra. 



PLATE I . 



2) 



4> > 



Oxyhaemoglobin. 



Haemoglobin. 



Carboxy- 



haemoglobin. 



Neutral Met- 



haemoglobin. 



Alkaline Met- 

 haemoglobin. 



Alkali 

 Haematin. 



