URINE. 



159 



Water 

 Solid residue 



Urea 



Uric acid 



Free lactic acid 



Lactates 



Extractive matter soluble in water 



Extractive matter soluble in alcohol 



Mucus 



Chlorides of sodium and ammonium 



Sulphates 



Phosphate of soda 



Earthy phosphates 



The six following observations were made regarding the 

 amount of urea : 



27th 

 28th 

 29th 

 30th 

 31st 



Urea in 1000 parts 

 of urine. 



46-67 

 53-79 

 46-19 

 41-65 

 50-36 



Urea in 100 parts 

 of solid residue. 



58-815 



59-043 

 59-320 

 63-811 

 62-413 

 64-382 



Urea secreted in 

 24 hours, in grammes. 



49-134 



50-913 

 52-034 

 56-095 

 54-071 

 56-887 



From these numbers it appears that, during a purely animal 

 diet, there is a mean daily increase of 20*7 grammes in the 

 amount of urea. During a mixed diet, the relation of the urea 

 to the other solid constituents = 100 : 116, while on an animal 

 diet it = 100 : 63. The uric acid was estimated on the last 

 four days of the experiment : 



28th July 

 29th 

 30th 

 31st 



Hence, while the mean daily amount of uric acid during a 

 mixed diet is 1*183 grammes, the amount is increased during 

 an egg-diet by -295 of a gramme, an increase not sufficiently 

 large to entitle us to suppose that a purely animal diet favours 

 the formation of uric acid in the healthy organism. During 

 a mixed diet, the proportion of uric acid to the other solid con- 



