PHYSIOLOGICAL EFFECTS OF GRADE WALKING. 



261 



The ventilation-rates for W. K. and E. D. B. have been plotted and are 

 included with the respiration curves in figures 28 and 29, based on kilo- 

 grammeters of work performed. In these two curves the total venti- 

 lations of W. K. and E. D. B. are practically the same for like amounts 

 of work up to 500 kg. m. ; beyond this point the total ventilation of W. 

 K. exceeds that of E. D. B. for similar amounts of work. From the 

 curves in figures 28 and 29, an estimate has been made of the venti- 

 lation requirements for increasing amounts of work. (See tables 76 

 and 77.) From these values are found the total and percentage in- 



TABLE 76. Pulmonary ventilation of W. K. with increasing amounts of work in 

 grade-walking experiments without food. (Values per minute.) 1 



'Based upon figure 28. 



TABLE 77. Pulmonary ventilation of E. D. B. with increasing amounts of work 

 in grade-walking experiments without food. (Values per minute.) 1 



'Based on figure 29. 



