[ 579 ] 
LXXVI. A remarkable Injlance of Four 
rough Stones , that were dij covered in an 
human urinary Bladder , contrary to the 
received Opinion ; and fuccejs fully ex trail- 
ed by the lateral Method of Cutting for 
the Stone. By Mr. Jofeph Warner, F. 
R. S. and Surgeoti to Guy’s- Hofpital. 
Read Feb. 23. r ■ \ H E favourable reception thofe few 
1 papers have met with from the 
Royal Society, which I have done myfelf the ho- 
nour of addreffing to them, encourages me to take 
the liberty of offering the following account to their 
conlideration : and I am the more immediately in- 
duced to fubmit this paper to their perufal, as the 
fadt hereafter related may poffibly be not efteemed a 
matter of mere curiofity ; fince it is probable, that 
the inferences deduced from the hiftory of the fub- 
fequent cafe, when attended to, may prove of the 
greated: confequence to the future eafe and welfare 
of the patient, as well as be a means of preventing 
the operator from falling into fuch errors, as cannot 
fail of drawing an imputation upon his character, in 
the practice of one of the mod; capital and difficult 
undertakings in his profeffion. 
It is a maxim laid down by the mod; judicious 
and bed; received writers upon operations in furgery, 
that when the furface of a d:one, which has been 
extracted from the bladder, appears to be totally 
trough, it amounts to a proof of its having been 
4 E 2 there 
