238 



METABOLISM DURING WALKING. 



TABLE 63. Total heat-output of W. K., with increasing amounts of work, in 

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



Estimated from curve in figure 23. 



TABLE 64. Total heat-output of E. D. B., with increasing amounts of work, in 

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



'Estimated from curve in figure 24. 

 INCREMENT IN HEAT-OUTPUT DUE TO GRADE-LIFT. 

 TOTAL INCREMENT IN HEAT DUE TO GRADE-LIFT. 



That portion of the total heat expended during grade walking that 

 is due to the grade per se is the total heat-output less the energy re- 

 quirements for standing and horizontal walking. This difference is 



