A Memoir on the Urie Acid. 401 
is digested with a solution of that substance, 
the oil is detached, and a ‘liquid results, 
which bears much resemblance to an emul- 
sion. Ten grains of uric acid, digested with 
30 grains of soap, and four ounce measures of 
distilled water, at a temperature of 180° 
Faht., were dissolved, except a small portion, 
estimated at most at half a grain. It appears, 
therefore, that soap may be expected to exert 
2 solvent action on those uric acid conéretions, 
which are lodged in the urinary passages. 
» 9. The compounds of sulphur and sulphu- 
retted hydrogen with alkalis are decomposed, 
when heated with uric acid, 
- 10. The uric acid is not dissolved, when 
digested with a solution of prussiate of 
potash. 
11. It is not acted upon by any acid, ex-' 
cept by those which, at the same time, effect 
its decomposition, viz. the sulphuric, nitric,, 
and oxymuriatic, the agency of which will 
be described, after detailing the properties 
that belong to the acid in its entire state. 
12. The uric acid is rapidly dissolved. by 
heated solutions of pure potash and pure soda, 
but less readily by that of ammonia. An 
ounce measure of liquid potash, of the spe- 
cific gravity 1108, dissolves about 60 grains 
of the acid. The solution has a strongly. 
3 E 
