BC D 



FIG. 31. i, Oxyhremoglobin ; 2, reduced haemoglobin ; 3, CO. haemo- 

 globin ; 4, methaemoglobin ; 5, methsemoglobin (after addition of alkali) ; 

 6, alkaline hsematin ; 7, acid hsematin (etherial solution) ; 8, hiematopor- 

 phyrin (acid) ; 9, hsematoporphyrin (alkaline) ; 10, bilirubin. 



