SPECTBUM PLATE. 



1. Absorption spectrum of a solution of oxylwmoglobin. 



2. Absorption spectrum of a solution of haemoglobin, obtained by the action of 



an ammoniacal ferro-tartrate solution on an oxy haemoglobin solution. 



3. Absorption spectrum of a faintly-alkaline solution of methc&moglobin. 



4. Absorption spectrum of a solution of Ttcematin in ether containing oxalic 



acid. 



5. Absorption spectrum of an alkaline solution of Jmmatin. 



6. Absorption spectrum of an alkaline solution of hcemochromogen, obtained by 



the action of an ammoniacal ferro-tartrate solution on an alkaline- 

 hsematin solution. 



7. Absorption spectrum of an acid solution of urobilin. 



8. Absorption spectrum of an alkaline solution of urobilin after the addition of 



a zinc-chloride solution. 



9. Absorption spectrum of a solution of lutein (ethereal extract of the egg-yolk). 



