1867.] 



Dr. Parkes on the Elimination of Nitrogen, 



351 



period of rest, it will be seen that in both men the skin and lung egesta 

 were very greatly increased (nearly 100 and 50 per cent, respectively) ; 

 the intestinal egesta were also much larger ; the urinary smaller, especially 

 in the case of T., who passed nearly 800 cub. centims. less of urine, though 

 he took more fluid as drink. 



Neither of the men were conscious of any perspiration. 



Fifth Period. — Ordinary Diet and Exercise. 



The men were now again placed on their weighed diet, and took their 

 ordinary exercise for four days, except that on the day following the walk 

 of 33 miles they were tired and rested a good deal. 



This period has now to be compared with the third period, which fol- 

 lowed that of rest. As the amount of diet is very important, I give the 

 mean amount in each of the four days of the third and fifth period, in 

 English ounces. 



Daily amount, in ounces (437*5 grains). 



S. 



T. 



Third, 

 or after 



rest- 

 period. 



Fifth, 

 or after 

 work- 

 period. 



Third, 

 or after 



rest- 

 period. 



Fifth, 

 or after 



work- 

 period. 





8-5 



9-81 



6-625 



7-87 



Bread 



17 



16-18 



16-25 



16-75 





13-68 



14-62 



13-5 



14-37 





1 



1 



1 



1 



Tea, with 1^ oz. of milk, l^oz. of sugar 



20 



20 



20 



20 



Coffee, with same amount of sugar and milk . 



20 



20 



20 



20 



Ale 



21 



20 



18 



20 



Salt uncertain 











In the fifth period each man took rather more than an ounce more 

 meat ; S. took oz. less bread, and T. | an ounce more ; each man took 

 I of an ounce more vegetables, and 1 and 2 ounces more water. It is to 

 be regretted that the diet was not precisely the same ; but the differences 

 are not very great, and it was thought desirable to allow the men to satisfy 

 their appetites. They were more hungry after the work -period than after 

 the rest-period. 



The weight increased in this period. In two days S. gained Ij kilo- 

 gramme and T. 1 ^ kilogramme, each man nearly getting his proper weight. 



The Urinary Excretion, 

 The quantity of Urine. 





s. 



T. 



After rest- 

 period. 



After work" 

 period. 



After rest- 

 period. 



After work- 

 period. 





1139 



1028 



1500 



1495 



VOL. XV. 2 F 



