15 72 Mr. Home's Observations on the Camels Stomach , tic. 
This mode of mastication appears to be peculiar to the 
ruminants, and is certainly very different, and much more 
imperfect than the mastication of the horse, whose molares 
are very compact in the texture of their crowns, and are op- 
posed directly to each other by horizontal planes. 
Letter from Charles Hatchett, Esq. concerning some Peculiarities 
in the Urine of the Camel . 
DEAR SIR, April 30, 1806. 
Being a short time absent from my house, and not having 
at hand any apparatus to examine the camel's urine, which 
you lately sent to me, I delivered it to my friend, Mr. W. 
Brande, of Arlington-street, who has on several occasions 
much distinguished himself in chemical science, and I now 
have the pleasure of transmitting an account of the results of 
his comparative experiments on the urine of the camel and 
the cow, which, I think, appear to be highly deserving of 
attention. 
The presence of uric acid in the former, and that of phos- 
phat of lime in both, are new facts, which reflect additional 
light on the composition of the urine of graminivorous animals. 
Mr. Brande first states his experiments on the camel’s 
urine as f .flows : 
“ I divided it into two equal portions, taking half for distil- 
lation, which was performed at a very low temperature. 
“ When somewhat more than three-fourths had passed 
over, the residuum in the retort became thick, assuming a 
deep brown colour, and having a peculiar fetid odour. I now 
stopped the distillation, and affused alcohol, with a view of 
