'I ';.r . " ' . > ,; 1 1 ' ' ' i ' ' ';:, '.'.. :. , .;. _ 



91 10 11 la 13 14) 15 16 17 18 19 



U E b 



\, Absorption-spectrum of a solution of oxyhremoglobin : 2, of a solution of haemoglobin : 3, 

 of a feebly alkaline solution of methfrmoglobin ; 4, of a solution of hpematin in acid ether 

 (oxalic acid) ; 5, of an alkaline solution of hrematin ; 6, of an alkaline solution of hsemo- 

 chromogen: 7, of an acid solution of urobilin; 8, of an ammoniacal solution of urobilin, 

 after the addition of zinc chloride solution; 9, of a solution of lute'in (ethereal extract 

 of the yolk of egg). 



