HAEMOGLOBIN 



489 



at the conclusion that CO 2 exerts a strong depressant action on the 

 amount of oxygen absorbed by the blood whenever the oxygen tension 

 is low, while its effect disappears almost completely if oxygen be 

 under the partial pressure of one atmosphere or 150 mm. Hg. In 

 the most recent paper by Bohr, Hasselbalch, and Krogh, 1 the inter- 

 relationship of C0 2 and 9 for normal dog's blood at 38 is 

 in the following table : 



These figures are represented in the following curves : 

 100 



90 

 80 

 70 

 60 



10 20 30 40 50 6O 70 80 90 100 110 120 130 140 150 



There seems to be no interference with the absorption of CO 2 what- 

 1 Chr. Bohr, K. Hasselbalch, and A. Krogh, Skand. Arch. 16. 402 (1904). 



