312 



Dr. Parkes on the EliminatAon of Niirogen, [Jan. 31, 



same, and as the smaller man only took J oz. cr 14 grms. less bread, and 

 25 grms. less vegetables, this would seem to be unlikely, and, if so, some 

 of the nitrogen taken by T. must have passed off in other ways. 



The mean relation of the ureal to the total nitrogen was very close in 

 each man, being, if the ureal nitrogen is taken as unity, as 1 to 1*1, and 

 as 1 to 1*108 respectively. From day to day, however, the relation varied. 



The intestinal excretion was examined only on one day, the last but one 

 of the series. 



Composition of Intestinal Excretion of Twenty-four Hours. 





Total 

 ■vreight, in 

 grammes. 



Solids. 



Water. 



Nitrogen 

 in grmmes 



s 



1711 

 198-47 



28- 58 



29- 916 



142-52 

 168-55 



1-642 

 1-98 



T 



The smaller man passed rather more solids, water, and more nitrogen 

 than the larger man, and through this channel some of the nitrogen 

 unaccounted for by the urine must have escaped. Whether this would 

 account for the whole of it cannot be stated, as the experiments in respect 

 of the nitrogen in the food and in the intestinal excreta of the whole 

 period were not sufficiently exact to determine this point. 



On the day when the intestinal excreta were analyzed, the total dis- 

 charge of nitrogen by the kidneys and bowels was — 



S. T. 



Urine 20-155 13'410 



Bowels 1-642 1*980 



Total. . . . 21*797 15-390 

 In S. nearly y^h, and in T, nearly ith of the total nitrogen passed by the 

 bowels. 



On the day when the intestinal excreta were analyzed, the balance of 

 ingesta and egesta, atmospheric oxygen being disregarded, was as follows : — 



S. T. 



Weight of body at commencement ofl 



period, in kilogrammes J 



Weight of body at close 68* 50-89 



Gain or loss, in grammes + 400 4- 130 



Total ingesta by food and drink, in 1 ^^g^ 2^^9 



grammes j 



Urinary egesta „ 1619 1774*8 



Intestinal egesta „ 171*1 198*47 



Skin and lung egesta „ 893 866 



The tissue-changes in these two men are therefore very closely the 

 same, and the men are quite comparable and well fitted for the experi- 

 ments. T. has rather a larger excretion (chiefly of water) by the kidneys 



