‘ag8_~. On the Compofition and Properties 
3. The nitric folution (2.) being evaporated: partly t@ 
drynefs, and partly to the confiftence of extraét, the dry 
refiduary matter was white; and the extra¢t-like matter, 
. which was bitter, could not be fufed under the blowpipes 
but, when brought to the ftate of a powder, the particles of 
it were made to cohere loofcly together into one mafs. 
4. On dropping fulphuric acid into the muriatic folution, 
.{2.) turbidnefs, and a copious white precipitation, immedi- 
ately enfued, from the compofition of fulphate of lime. 
From thefe experiments it is warrantable to conclude, that 
the above urinary calculus of a rabbit confifted principally of | 
carbonate of lime and common animal matter, with, per- 
haps, a very {mall proportion of phofphoric acid: it certainly 
contained no uric oxide, ‘ . : 
I examined, in the fame manner, a concretion which was 
faid to be from the ftiomach of a monkey; but I have not 
evidence of its origin equally fatisfaGcory as that of the two 
Jaft calculi. Its compofition was found to be fimilar to that of 
the calculus of the rabbit, viz. carbonate of lime and animal 
matter. Its obvious properties were alfo the fame; it wag 
of the fize of the largeft nutmeg. 
WI. On Urinary Concretions of the Horfe. 
I examined feveral fpecimens in cabinets, faid to be veficat 
calculi of the horfe, and found none of them to contain the 
uric oxide above defcribed ; but that they confifted (as welt 
as the calculi from the ftomach and inteftines of the fame 
animal). of phofphate of lime, phofphate of ammoniac, and 
fommion animal matter, which melted like fuperphofphate 
of lime, after burning away the animal matter and ammo- 
niac, As theie, and fome other experiments, feemed ta 
concur in eftablifhing an important truth, I thought it ne. 
eeflary to examine an urinary concretion of a korfe, which, 
from its figure and fize, was unqueftionably from the kidney 
pf that animal; for I'haye found by experience, that one 
fannot depend entirely on the accounts in cabinets, nor 
. indeed, 
