RESPIRATION 



I8l 



the alveolar CO2 pressure remains low for about an hour.^*^ We 

 attributed this to the effect on the respiratory center of lactic acid 



10 tS 20 25 30 3S 40 45 50 55 60 65 70 75 



nun CO2 



Figure 54. 

 © Blood, + Serum, O Corpuscles of same sample. 13 Blood, 

 X Serum of another sample. / Blood of another sample. Q 

 Another sample of blood. Same sample with acetic acid added. 



O 8 parts — NaaHPO* and 2 parts — KH2PO4. □ Equal 

 15 15 



parts — Na^HPO* and KHjPO*. • — KCl solution. 

 15 10 



given off into the blood by muscles in which the work had been 

 far in excess of the possible oxygen supply. The correctness of 



"Douglas and Haldane, Journ. of Physiol., XXXVIII, p. 431, 1909. 



