PHYSIOLOGICAL EFFECTS OF GRADE WALKING. 



269 



reproduce the records for the other days. The data graphically given 

 were selected with a view to showing the body-temperature with a 

 variety of grades and speeds of walking, and the response of the tem- 

 perature record to the changes from rest to work and the reverse. 

 During the experiments on these days the room temperature was, 

 on the average, about 21 C., varying not more than 2 or 3 C. from 

 this in any experiment. 



36.60 



sew 



c. 



37.60 

 37.40 



37.20 

 37.00 

 36.80 

 36.60 



SB" 



*r 



55 fT33 2& 



-K)C.ct 



47 melon 



1 



FIG. 33. Typical body-temperature curves of E. D. B., with 

 subject standing and walking on an incline. (Values 

 per minute.) 



1, subject sitting; 2, standing; 3, walking on an incline. 

 Black points, records during experimental periods; open 

 circles, records between periods. Curve A, Apr. 15; B, 

 Apr. 14; C, Apr. 6, 1916. 



In figure 33 are three curves (April 15, 14, and 6) for periods with 

 the subject in the standing position, also walking with grades of 2.4, 5, 

 and 10 per cent. The temperatures for the standing position were 

 fairly constant until the point when walking began, which is indicated 

 by the arrow and the numeral 3. 1 The rise in the temperature curve 



curves are drawn by connecting the points for the consecutive readings. The locations 

 of the numbers and arrows for change in position refer to the approximate time and not to the 

 temperature. 



