46 



Dr. Parkes on the Blimimtion of Nitrogen. [June 20, 



the urea by Liebig's mercuric nitrate, the chloride of sodium being got 

 rid of. The stools were weighed every day*. 



On the days of rest the men remained in one room, sitting quite still 

 or lying on the bed ; they did not leave the room. ^ 



On the first day of exercise they walked twenty-four miles on level 

 ground between 8.10 a.m. and 8 p.m. On the second day they walked 

 thirty-five miles between 8.10 a.m. and 9.45 p.m. 



The walking was done well, and S., who had been the subject of the 

 previous experiments of exercise on a non-nitrogenous, diet, was quite 

 certain that he supported tlie fatigue much better under the meat diet, 

 than on the former occasion when he was fed on starch and butter. 



The amount of work done (the weight of their clothes being taken 

 into account) was calculated by Mr. Haughton's formula, .pz,, that 

 walking on a level surface is equal to lifting of the weight through 

 the distance walked. 





First day. 



Second day. 



Kilogramme- 

 metres. 



Tons lifted 

 a foot. 



Kilogramme- 

 metres. 



Tons lifted 

 a foot. 













s 



B 



129198 = 

 125120 = 



416 



403 



194798 = 

 188605 = 



627 

 607 



The weight of the lody. 

 The following Table gives the daily variations in the weight of the 

 body during the whole period. The weight was taken at the end of 

 the 24 hours. 





S. 



B. 













lbs, av. 



lbs. av. 



Ordinary occupation, 





145 



i3-9'5 



M >> 



2nd „ 



145 



140 



M » 



3rd „ 



146 



139 



>> M 



4th „ 



145 



139*5 



Hest ^ 



5tli „ 



144 



13875 





6th „ 



i43'5 



138-5 



Ordinary occupation, 



yth „ 



144 



138-5 





8th „ ......... 



145 



i39'25 



>> >) 



9th „ 



i45'5 



139*5 



11 11 



10th , 



145 



140 





nth „ 



142 



137 







i39"5 



135 



Ordinary occupation. 



13th , 



142 



13575. 



11 11 



14th „ 



143 



137-5 



11 



15th „ 



144 



138-25 



»» 11 





144-5 



13975 



The following Table shows the gain or loss of body-weight in grammes 

 (round numbers) . 



* I determined also the chloride of sodium and the phosphoric acid (on three pcea- 

 sion.s), but I have not included these results, in order not to complicate the statement. , 



