[ 4° i ] 
Angle b projects about a Finger's Breadth from the 
Orifice of the Bladder. Yet there are fome SubjeCis, 
in whom this Orifice, being very wide or relaxed, 
gives greater Way to the Effort made by the Widen- 
ing, dd , of the anterior Angle of the Catheter ; 
whereby it happens, that, inftead of flopping this 
Angle at dd , it lets it pafs thro’ to ff which brings 
the Incifion fo much nearer the Neck of the Blad- 
der: Nay, I have feen in fome dead Bodies, in which 
the Relaxation is dill greater, that the Proffate was 
fomewhat concerned in the Incifion j which is no 
great Misfortune. But even this may be eafiiy avoided, 
by taking care, in the firft Incifions, to difengage 
the Part that anfwers to the projecting Angle from 
every thing that may hide from us the Proftate and 
Bladder; and then the foregoing Cafe becoming vifi- 
ble, it is eafy to guard againft it, by caufing the pro- 
jecting Angle of the Catheter to be pufh’d, or by 
pufhing it one’s Self farther into the Bladder. 
This projecting Part of the Catheter is not feen ; 
but it is very perceivable to the Touch, thro’ the 
Integuments ; and ftiil more fo, after they are cut 
through. 
I muft not omit obferving here, that, notwith- 
ftanding all the Care I have taken to inftruCt the 
Inftrument-maker in. the ConflruCfion of this Cathe- 
ter-, and efpecially of the moveable Piece bC , in 
order to make it foiid : Yet it has often proved too 
weak to bear the Effort of thrufting the Part for- 
ward, which we are obliged to do on one Side j fo 
that it bent, and remain’d in the Middle, while the 
reft of the Catheter was to the left Side. 
