158 THE SECRETIONS: 



Absolute weight Solid residue Whole amount 



of urine in 24 hours, Spec. grav. in of solid residue, 



in grammes. 1WO parts. in grammes. 



921 1029-2 80-87 79-34 



1240 1021-9 66-12 81-99 



998 1030-7 84-23 84-06 



1075 1027-8 77-72 83-55 



1184 1026-4 72-30 85-61 



1384 1018-7 59-21 82-09 



1113 1028-5 78-15 86-99 



1092 1028-9 79-04 86-23 



979 1033-8 90-68 88-78 



1211 1026-3 72-38 87'85 



1346 1024-3 66-73 89-84 



1127 1029-0 78-38 88-38 



If we compare the mean of these numbers with the mean 

 of the former corresponding table, we have : 



During a mixed diet. During animal diet. 

 The absolute weight of the urine in 



24 hours . . 1057-8 grammes 1202-5 grammes 



Specific gravity . . 1022-0 1027-1 

 Amount of solid residue in 1000 parts of 



urine . . 65-82 75-48 



Sum of the solid constituents . 67-82 grammes 87-44 grammes 



Hence it appears that, during a purely animal diet, the 

 amount of solid constituents is increased, while at the same 

 time the amount of water is augmented by no less than 125 

 grammes, notwithstanding these experiments were made in 

 June, and those with a mixed diet in October. 



From the above data it appears that the solid matters dis- 

 charged by the urine during an animal diet amount to about 

 one fourth of the amount of dry nutriment. 



The following are the principal changes in the urine induced 

 by use of a strictly animal diet. It becomes pale, of a straw 

 colour, limpid, and similar in appearance to the urine of the 

 carnivora. On the addition of nitric acid, crystals of nitrate 

 of urea were immediately produced. Uric acid was gradually 

 deposited in large crystals. The reaction of the urine was always 

 decidedly acid. Two analyses instituted with the urine passed 

 on the 28th and 30th of July, (the 9th and llth days of the 

 experiment,) gave the following results : 



