Mr. Hatchett’s Observations , &c. 
873 
ascertaining whether it contained urea. This I obtained in a 
considerable proportion. It had the same appearance and 
properties as that which is afforded by human urine. What 
remained after the separation of the urea, consisted chiefly, 
as far as I could ascertain, of muriat of potash, with a little 
muriat of ammonia, phosphat of lime, and probably urat of 
potash. 
“ I may here remark that no benzoic acid was separated 
towards the latter part of the distillation, nor could I obtain 
any from the residuum. 
“ The remaining portion of the urine was examined by the 
following tests : 
“ Nitrat of silver occasioned a very copious precipitate, 
which became speedily black on exposure to light. 
“ Muriat of barytes indicated the presence of a minute por- 
tion of sulphuric acid. 
“ Ammonia threw down a little phosphat of lime. When 
muriatic acid was poured into the urine, an effervescence was 
produced by the emission of carbonic acid gas. 
“ A portion of the urine, which had been exposed to the air 
for some days, deposited a sediment, which when treated with 
nitric acid, and evaporated, assumed a red colour, and thereby 
shewed the presence of uric acid. 
“ From the results of these experiments, and of some 
others, which I do not think it necessary to mention, I have 
drawn the following conclusions relative to the component 
parts of camel’s urine ; but as the quantity, upon which I 
operated was small, they must only be regarded as an ap- 
proximation to the truth. 
