Bodily Labour upon the Discharge of Nitrogen. 



489 



Experiment III, 1882. July 6th to July 16th. 



Two work days were introduced into the experiment, with the 

 view of testing the effect of muscular labour upon the elimination of 

 nitrogen at a time when it might be supposed that the reserve of 

 nitrogen had been considerably drawn upon by previous exercise, and 

 before there was time to accumulate a fresh store. 



Work done, July 9. 

 Table H. 



Distance walked 33 miles. 



Total time of journey 9 hours. 



Halts 2 „ 



Actual time of walking 7 ,, 



Average pace 4" 71 miles per hour. 



Load carried 27 lbs. 



I was prevented from observing my body-weight at the end of the 

 journey, as I did not return to town the same evening, and a 

 weighing machine was not accessible. 



The loss of weight may, I think, be reckoned at about 4 lbs., 

 considering the difference between the weight before starting and 

 the weight taken the next day. 



Work done, July 13, 1882. 



Table H. 



Distance walked 47 miles. 



Total time of journey 11£ hours. 



Halts 1^ hour. 



Actual time of walking 10 hours. 



Average pace 4*7 miles per hour. 



Weight (naked) before starting .... 130*75 lbs. 



,, on returning 124 - 00 ,, 



Loss 6*75 ,, 



Load carried 27'75 „ 



This journey was one of the greatest efforts I have ever made 

 in the course of these experiments. The first 16 miles was covered 

 in 3 hours 10 minutes, during the greater part of which time it rained 

 heavily, and the roads were consequently in very bad condition. I 

 was excessively tired on my return, but by no means exhausted. Food 

 and rest soon dissipated the effects of the walk, and the next morning 

 I was none the worse for the exertion, with the exception that I 

 was a little stiff, and suffered all day from intense thirst. I may 

 here remark that on every occasion on which I have sustained con- 



yol. xxxi x. 2 K 



