1867.] Dr. Parkes on the Elimination of Nitrogen, 



347 



mula, that walking oq a level surface is equal to lifting g-y-tli of the weight 

 through the distance walked. 



S., weight with clothes, 73*68 kilogrammes. Work done = 140839 

 kilogramme-metres, or 453-6 tons lifted a foot. 



T., weight with clothes, 56*33 kilogrammes. Work done = 10/655 

 kilogrammes-metres, or 346-74 tons lifted a foot. 



Second day. — Distance walked 32-/8 miles = 52-74 kilometres. 



Work done. 

 S. = 194294 kilogramme-metres. 



= 625*8 tons lifted a foot. 

 T. = 147515 kilogramme-metres. 



= 4/5 tons lifted a foot. 



The first day's walking was done pretty well by both men. On the 

 second day both men did the first 20 miles well, but felt very much 

 fatigued during the last 13 miles. During the last 4 miles each man felt 

 pain in the small of his back. Both men could, however, have marched on 

 the following day if necessary. 



With regard to the amount of fatigue as compared with other occasions, 

 T. would give no opinion, as he said he had no fair basis of comparison. 

 S., however, was clear that he was much more fatigued than on other food. 

 In 1865 in Ireland he marched 26 miles on one day and 20 on the following, 

 carrying his rifle, accoutrements, and forty rounds of ball-cartridge (an 

 additional weight equal to 18 lb. nearly), and yet he did not feel fatigued at 

 all ; while on the present occasion, marching without weight except his 

 clothes, he felt much exhausted. 



Both men felt hungry ; the food satisfied them ; neither had any per- 

 ceptible action of the skin ; the days were fine and rather warm. During 

 these two days S. lost almost precisely 2 kilogrammes in weight, and T. 

 lost I of a kilogramme. 



The Urinary Excretion. — The urine was collected as usual from 8 a.m. 

 to 8 A.M. on the first day, and from 8 a.m. to 8 p.m., and from 8 p.m. to 

 8 a.m. on the second day. In order to compare this, I have placed to- 

 gether the chief urinary constituents in the two periods of rest and exercise. 



Amount of Urine, in cubic centimetres. 





s. 



T. 



Rest. 



Exercise. 



Eest. 



Exercise. 



Fii'st 24 hours 



First 12 hours of second day " 



Second 12 hours of second' 

 day (night urine) j 



\ 



2230 

 1550 



910 



2550 

 1210 



1020 



2120 

 1G90 



GOO 



1650 

 1000 



650 



