[ 2 7 ] 
This is fcarce to be credited j but there is too much 
Reafon to believe, that the Want of Succefs in Sub- 
jects arriv'd at adult Age, where the Stones are almoft 
always large, is owing intirely to this very Circum- 
flance. 
When all this Violence is infufficient, there is at 
prefent no other eftablifh’d Method, than cither to 
attempt the making a fecond Incifion on the Stone, 
as it is held in the Forceps , or to withdraw the lat- 
ter, and to make it on the Bladder, in the flaccid 
State it then lies, without any Guide at all. 
As to the firfl Method, it is evident the Forceps , 
Stone, and Bladder in Men are fo much in the dark, 
that the Incifion mad be made with the utmofi: Dif- 
ficulty ; indeed it is hardly poflible to cut at all with 
any Certainty. 
The other W ay of cutting on the Bladder when 
the Forceps is withdrawn is much vvorfej for if it 
be remember’d, that the Bladder licth upon, and is 
contiguous with the Rettum , and that they are both 
in the fame flabby State, it will appear impofliblc 
to cut the one, without (at leaft a very great Rifquc 
of) wounding the other. 
This manifeft Defeat in the Operation would be 
intirely removed, if there always was a Director for 
the Knife left in the Bladder j and this is fo eafily 
and completely to be done, that its great Simplicity 
feems to be the Reafon it has not been attended to. 
If one Limb of the Forceps , from the Joint to its 
Extremity, be converted into a Staff, by making a 
deep Groove through its whole Length, it will bet- 
ter anfwer the End defired, than if it were poflible 
to buffer the Staff itfelf to remain in the Bladder 
D 2 during 
