162 THE SECRETIONS: 



The amount of urea was ascertained daily from the 17th to 

 the 23d of August : 



Urea in 1000 parts Urea in 100 parts Daily amount of urea, 



of urine. of solid residue. in grammes. 



28-87 38-145 23-585 



26-00 41-211 23-815 



30-68 37-988 22-089 



28-31 40-078 22-618 



22-42 38-607 20-880 



25-52 33-093 21-467 



25-69 39-478 22-917 



Hence, on an average, the urea amounted to 39-086 of the 

 solid residue, and 22-481 grammes were daily excreted. The 

 effect of diet on the urea may be seen by the following table : 



In 100 parts of Daily amount, 



solid residue. in grammes. 



Urea during a mixed diet . . 46-230 32-498 



an animal diet . . 61-297 53-198 



a vegetable diet . . 39-086 22-481 



Consequently, during a vegetable diet, there is both an ab- 

 solute and a relative diminution of urea. 



The uric acid was determined on five occasions : 



Uric acid in 1000 parts Uric acid in 100 parts Daily amount of uric acid, 



of urine. of solid residue. in grammes. 



1-40 1-836 1-135 



1-23 1-947 1-125 



1-17 1-652 -933 



1-01 1-743 -942 



89 1-489 -969 



Consequently, the average daily amount (from these five 

 analyses) was 1*021 grammes; and, on comparing this with the 

 previous data, we have : 



In 100 parts of Daily amount, 



solid residue. in grammes. 



Uric acid during a mixed diet . . 1'710 1-183 



an animal diet . . 1-674 1-478 



a vegetable diet . 1-737 1-021 



Hence the uric acid is scarcely affected by the diet. 



From three analyses it appeared that 1-189 grammes of free, 

 and 1-371 grammes of combined lactic acid were daily excreted 

 during a vegetable diet ; and, associating these with the pre- 

 vious numbers, we have : 



