442 



BLOOD AND LYMPH. 



more rapidly, then also the oxygen-carrying capacity of the 

 blood is increased. In favor of this view, Abderhalden, for in- 

 stance, has claimed that if animals of the same species and same 

 litter are bled to death and the total quantity of hemoglobin 

 is estimated, the average figures obtained for the animals at low 

 Haemoglobin. 



70O 65O 60O 55O 50O 45O 40O 



Almospheric pressure in mm of mercury: 



350 



300 



Fig. 185 a. To show the relationship between altitude and the percentage of hemoglobin 

 in the blood. Figures along the bottom give the atmospheric pressure ; along the ordinate to 

 the right the altitude in feet, and along the ordinate to the left the percentage of hemoglobin. 

 (Fitzgerald.} 



levels are the same as for those at the high altitudes. Zuntz has, 

 however, called attention to the fact that when Abderhalden's 

 figures are estimated per kilogram of weight they show an in- 

 crease in total hemoglobin in the high altitudes, and he and other 

 observers have obtained similar results. It seems certain, there- 



