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Thirdly, Mr. Rau held the Staff with his left 
Hand, and did the Operation with his right, Thofe 
who do the lateral Operation of the firft three Sorts 
do not certainly find both their Hands too much for 
cutting into the Urethra and the Proftate, without 
injuring the neighbouring Parts : And yet it is pre- 
tended, that Mr .Rau could open the Body of the 
Bladder very exactly (an Operation which I have 
proved above to be impoftible in his Manner/; it is 
pretended, I fay, that he did this Operation with one 
Hand, a Thing which is more than pollible ; fince, 
in order to do it with the new Staff, which pro- 
jects forward, befides the two Hands of the Operator, 
which are abfolutely neceffary, we are obliged to 
make an AfTiftant put his Finger, or an Inftrument 
i ahead of it, into the Reflum, to keep the Gut clear 
of the Place of the Incifion. 
Fourthly, Mr. Chefelden , in the firft Trials he 
made of this pretended Method of Mr. Ran-, opened 
the Body of the Bladder, and found himfeif under a 
Neceflity of relinquifhing this Method, becaufe pu- 
trid Ulcers were formed, in the Courfe of the Cure, 
in the cellular Membrane that furrounds the Bladder 
and Reffum. Now Dr. Heifter , a Difciple of Mr. 
Rau , fays, This Accident never happened to Mr. 
Rau ; therefore he did not open the Bladder in its 
Body : For there is no Reafon why he fhould avoid 
this Accident jrather than Mr. Chefelden. 
Fifthly, Mr. Rau made all his Inciftons, the in- 
ward as well as the outward, with the fame Inftru- 
ment, whofe Make was much like the common 
Cutting Knife, according to Dr. Heifter. This laft 
Circumftance makes me think, not only that Mr. 
Rau 
