379 
on the Urine of the Camel. 
From all these it therefore appears, that soda and its com- 
binations do not form any part of the urine of the camel, cow, 
guinea-pig, and rabbit ; unless we may be permitted to believe 
that the composition of the urine of animals in general, is 
various at different periods, not only in the proportions of the 
ingredients, but also in the quality. 
. Should however the contrary of this be the case, we may 
assert that the urine of the horse is peculiarly distinguished 
from that of the above mentioned animals, by the presence, 
and abundance of soda, as the following analysis made by 
Fourcroy and Vauquelin will demonstrate. 
Component Parts of the Urine of the Horse * 
Carbonat of lime - - - 0011 
soda - 0009 
Benzoat of soda - 0024, 
Muriat of potash - - 0009 
Urea - - - 0007 
Water and mucilage - 0940 
1000. 
Now unless the urine of animals is very differently com- 
posed at different periods, there is in this instance a marked 
chemical character between the urine of the horse, and that 
of the above-mentioned graminivorous animals : and if so, 
perhaps the same may prevail respecting those other animals, 
which are the most nearly allied to the horse. 
This certainly merits investigation ; but it can only be ac- 
complished by a number of comparative experiments, and 
* Thomson, Vol. IV. p. 655. 
