1110 



PHYSIOLOGY 



plays an important part in the lower tensions such, as 40 and 80 mm. Hg. 

 carbon dioxide. It must be remembered that 40 mm. carbon dioxide repre- 



100 



40 



30 



20 



10 



10 20 30 40 50 60 70 80 90 100 



FIG. 608. Dissociation curve of haemoglobin in various solvents. 

 I, in water; II, in 0'7 per cent. NaCl ; III, in 0'9 per cent. KC1. 

 (BABCKOFT.) 



10. 20 30 



50 60 7O 80 90 100 HO 120 130 1W 450 



Fia. 509. Effect of varying tensions of CO S on the dissociation curve of oxyhaemo- 

 globin. The lowest curve is the dissociation at a C0 2 tension of 420 mm. Hg. from 

 observations by Barcroft. (Bonn.) 



