348 Dr. Parkes on the Elimination of Nitrogen, [Jan. 31, 



Excretion of Nitrogen, in grammes, in Urine. 





S. 



T. 



Urea. 



Total nitrogen 

 by soda-Hme. 



Urea. 



Total nitrogen 

 by soda-lime. 



Eest. 



Exer- 

 cise. 



Eest. 



Exer- 

 cise. 



Eest. 



Exer- 

 cise. 



Eest. 



Exer- 

 cise. 



December 17-18, first"! 



December 18, first T 

 12 ( day) hours of )■ 



December 18-19, last"] 

 12 (night) hours of > 



20-00 

 8-525 



5-005 



19-125 

 7-865 



7140 



9-33 

 4-005 



3-017 



10-048 



4533 



3-360 



17-3 

 8-45 



42 



16-005 

 8-000 



5-200 



8-765 

 4-912 



2-170 



7-994 

 4-522 



3-553 



Total in two days... 



33-530 



34-130 



16-352 



17-942 



30-030 



29-205 



15-847 



16-069 



The excretion of the urea was very parallel in the two men, and followed 

 this course. In each man in the first twenty-four hours nearly 1 gramme 

 less was excreted by each man in the period of exercise as compared with 

 that of rest ; the larger man excreted nearly 3 grammes more urea than the 

 smaller one. 



In the next twelve hours- each man excreted very nearly ^ a gramme less 

 in the period of exercise as compared with rest. The absolute quantity was 

 almost precisely the same in each man ; in other words, the bulk of the 

 larger man now had no effect in the urea. 



In the last twelve hours (chiefly rest during night) the urea increased in 

 each man in the period of exercise, as compared with that of rest, the abso- 



lute increase in S. being 2 grammes, and in T. 1 gramme. 

 Taking the whole period, — 



Excretion of urea in two days in the period 1 S. T. 

 of exercise as compared with rest J +0"60 — *825 



The results, when the total nitrogen is considered, are as follows : — 

 Slightly more nitrogen was excreted by S. in the period of exercise 

 throughout ; the excess being,— 



grm. 



In the first 24 hours 0718 



In the next 12 hours 0'528 



In the last 12 hours '343 



Total excess of nitrogen during exercise period . 1*589 

 In the case of T. the total nitrogen during exercise was like the urea 

 below the period of rest in the first 36 hours, but in the last 12 hours the 

 excess of nitrogen in the period of exercise was so considerable as to 

 cause the nitrogen of the two days of exercise to exceed that of rest by 

 0*223 gramme. 



