1867.] Bv.VsLYkes on the Eliininaiion of Nitroffen, 341 



S. took about '5 oz. salt and T. about '33, exclusive of salt in food. 

 Adding the water of the so-called solid food to the water taken as drink, 

 the daily amount of food was, in grms. — • 



S. T. 



Water-free solids, in grms 662*2 610-2 



Water, in grms 2334-5 2212*3 



Total food ingesta 2996-7 2822-5 



The mean weight of this period was for S. 67*7 kilogs. and for T. 50*6 

 kilogs. The ingress of solid food per kilog. of body- weight was 9 "78 and 

 12 grms. respectively. The smaller man eat therefore absolutely rather 

 less, but relatively more. 



During four days of this period the mean daily urinary excretion was, 

 in grms. and cubic centimetres — 





Quantity. 



Sp. gr. 



Urea. 



Nitrogen 

 in urea. 



Total 

 nitrogen 

 by soda- 

 lime. 



Non- 



ureal 

 nitrogen. 



Chloride 



of 

 sodium. 



s. ., , 

 T. 



1226 



1335 



1028-25 

 1020-5 



35-001 

 25-925 



16-334 

 12-098 



17-973 

 13-409 



1-639 

 1-313 



14-23 

 11-685 



The excretion of nitrogen was fairly constant from day to day, the range 

 of the urea being, in the case of S., from 38*37 to 33*36 grms., or be- 

 tween 2 and 3 grms, above and below the mean amount ; and in the case 

 of T. from 27'68 to 24*906, or nearly 1 grm. above and below the mean 

 amount. This shows the daily equality of diet and exercise. 



Calculated for body-weight, the amount per kilog. is — 





Urea. 



Nitrogen 

 in urea. 



Total 

 nitrogen. 



Non- ureal 

 nitrogen. 



s 



*517 

 *512 



*241 

 •239 



•265 

 •265 



•024 

 •026 



T 





The very close relation, indeed identity, as far as the total nitrogen is 

 concerned, of the excretion per kilog. of body-weight in these two men 

 comes out very clearly, and shows that there must be a real connexion 

 between body-weight and urinary excretion. 



It is remarkable that while the heavier man passed 4|- grms. more 

 nitrogen daily from the kidneys than the smaller man, he did not eat any 

 great excess of food. Unfortunately, as the nitrogen in the food was not 

 perfectly determined, it is impossible to know precisely whether the 52 

 grms. of excess of solid food taken by the larger man would contain 4| 

 grms. more nitrogen. As, however, the amount of meat was precisely the 



