Rates of oxidation and reduction of blood 179 



As I had carried my speculation so far, I indulged in the luxury 

 of patching the curves of oxidation and reduction together, or rather 



too 



10 20 30 



50 60 70 80 90 100 



100 



1 00 



FIG. 96. Curves of oxidation and reduction of blood corresponding to conditions 

 approximating to those of A, oxidation in the lung and reduction in a resting muscle. 

 B, oxidation in the lung and reduction in a small active muscle. C, oxidation in the 

 lung and reduction in muscle during general muscular exercise. Ordinate = percentage 

 saturation. Abscissa minutes of time. 



the "^working " portions of the curves, in order to form a picture of 

 the relative rates at which the tide of oxygen rose and fell in the 



122 



