- [ 3° 6 ] 
is done in the operation of cutting for the ftone in the 
urinary bladder. I then proceeded to divide the ure- 
thra longitudinally by incifion. The extent of the 
incifton was from one end of the fwelling to the 
other : the length and fize of the wound enabled me 
to take away the ftones without any violence or diffi- 
culty. 
After the ftones were removed, I brought the lips 
of the wound together, and, with the twifted future, 
I retained them in that lituation. By this method, 
and by occalionally paffing a bougie of a proper lize 
into the urethra, beyond the farther extent of the in- 
cilion, the patient went happily on, till the cure of the 
wound was completed, which was effected in about 
three weeks j and there afterwards remained no incon- 
venience at all to the patient in voiding or retaining, 
his urine. 
N. B. As the identical calculi are prefented to the 
Fellows of the Royal Society for their infpedtion, 
fo that the exadf fizes, ftiapes, and external forma- 
tions, of thefe ftones may be feen ; I think it quite 
unneceffary to give a written account of thefe par- 
ticulars. However, as it may probably give fome 
fatisfadlion to the curious to be informed of the fpe- 
cific gravities of thefe ftones, I have fubjoined 
thefe particulars to this memoir, and have like- 
wife, for the fame reafon, caufed an engraving of 
thefe ftones to be made, and added to this paper. 
Weight 
