1867.] Dr. Parkes on the Elimination of Nitrogen, 353 



1'14 grm., but as the man took 1-245 oz. more meat, \ oz. more bread, 

 and almost an ounce more vegetable (in all 1-2 grm. of nitrogen), it is 

 evident that here also the excess of nitrogen in the urine might have been 

 derived from the food. However, it is really probable that some of the 

 very large excess of urea on the first day of this period, in the case of T., 

 was really owing to augmented ehmination from the work. No such ex- 

 cess is observable in the case of S., who had, however, a larger elimination 

 than T. in the previous twelve hours. 



The Chloride of Sodium. 

 The chloride of sodium rapidly returned to its previous amount. 





S. 



T. 





1-444 



1-614 





6-169 



4-905 



Third day 



10-25 



8-513 



Fourth day 



8-117 



6-446 



It will be remembered that T. always took less salt than S. The third 

 period is not comparable with the fifth, as the men took by mistake a 

 great deal of salt on the second day. 



The Phosphoric Acid. 





S. 



T. 



Third day 



1- 565 



2- 413 

 2-548 

 2-408 



2-158 

 2-273 

 2-533 

 2-065 



As the phosphoric acid was not determined in the third period, no com- 

 parison is possible, but the above Table shows that no excess passed off in 

 the after-period. 



The sulphuric acid was not determined in this period. 



The Intestinal Excreta, in grammes. 





S. 



T. 



Total 

 weight. 



SoHds. 



Water. 



Nitro- 

 gen. 



Total 

 weight. 



Solids. 



Water. 



Nitro- 

 gen. 



Dec. 19-20; first day ... 

 Dec. 20-21 ; second day. 

 Dec. 21-22 ; third day... 

 Dec. 22-23; fourth day. 



298 

 191-7 

 134-9 

 171-1 



21-86 



113-02 



1-264 



127-5 

 213 

 71 



191-7 



11-8 



59-2 



•7188 



The large intestinal excretion on the first day, in the case of S., was 

 owing to a little looseness of the bowels ; there were two stools on that 

 day, being the only instance of irregularity in either man. Otherwise, as 



