RESPIRATION 



371 



lower altitudes in South Carolina. ^^ The average results are 

 shown in Figure 98. The results for men and women are given 

 separately, as men have a higher average alveolar CO2 pressure 

 than women, as mentioned in Chapter II. It will be seen that 

 within the limits of atmospheric pressure investigated, the aver- 



Cas pressure AlUhidle. 



mm of 800 750 700 650 600 550 500 450 400 550 300 2SO 200 '" ^*'- 



eOO 750 700 650 6O0 550 500 4SO 4O0 3SO 300 250 200 

 Atmospheric pressure in mm. of mercury. 



Figure 98. 

 Alveolar gas pressures in relation to barometric pressure or altitude. 



age alveolar CO2 and oxygen pressures fall proportionally to 

 the atmospheric pressure. To judge from these results the al- 

 veolar oxygen pressure at the height of 24,600 feet reached by the 



" FitzGerald, Phil. Trans. Roy. Soc, B, 203, p. 35 1 ; and Proc. Roy. Soc, B, 

 88, p. 248. 



