[ 399 ] 
upon a Par with, or perhaps of having the Prefe- 
rence of, the other three. 
Such are the Reflections which l was led to make 
on Mr. Foubert's Operation, by the good Things I 
have heard of it, and the ill Confequences which I 
knew attended it. I endeavoured to find an Intern- 
ment that could fix the Incifion into the Body of the 
Bladder to the Place intended : And here is [the 
Defcription of] that which I invented for this Pur« 
pofe : 
This Inftrument is a Staff reprefented in Tab. IV. 
Fig. i. fuch as it is when Ipafs it into the Bladder. 
Ay Is its crooked End, which is fplit length- 
ways into two Pieces 5 the concave Piece of which. 
Ay is fixed, and of the fame Piece with the reft 
of the Staff j and the convex Piece, C, is moveable, 
having its fixed Point joined by a Hinge to the End 
a of the Piece Ay and its moveable Part jointed at 
by with a Piece which makes the End of a ftrong 
Stilet Cor Wire] that runs thro' the Centre of the 
Piece By where it is riveted at e. This Piece B t 
the Wire, and the Piece C, are held in the Situation 
which the Operator puts them in, by the Screw E , 
the End of which bears againft the Piece B. This 
is made of two folid Plates of Silver folder’d to- 
gether j in the Middle of which a Groove has been 
made to lodge the Wire. 
The Handle, F), of the Staff, is fquare, efpecially 
on the Infide, in order to ferve as a Sheath for the 
Piece By and give it a Firmnefs, which it commu- 
nicates to the Wire, and to the moveable Piece C. 
The Body, G, of the Catheter is almoft intirely 
foiid, leaving in its Centre but juft Room enough 
E e e z fof 
