434 



THE BLOOD. 



[CH. XXVI. 



Oxy haemoglobin shows a band (Soret's band) between the 

 lines G and H. In haemoglobin, carbonic oxide haemoglobin, and 



Fig. 366. The photographic spectrum of haemoglobin and oxy haemoglobin. (Gamgee.) 



G HK LM NO 



Fig. 367. The photographic spectrum of oxyhsemoglobin and methtemoglobin. 

 (Gamgee.) 



nitric oxide haemoglobin this band is rather nearer G. Methae- 

 moglobiu and haematoporphyrin show similar bands. 



We owe most of our knowledge of the "photographic spec- 



