252 On the Animal Calculus. . ! 
that it is fo well approved of by other Surge- jt 
ons, chat many of them make ufe of it. 
54. This ftraic Inftrument will therefore 
ferve to extrad fuch Stones as are lodged, af- ,1 
ter they have paffed the Turning at the Os L' 
Pubis ; and I am informed that they arc p 
apreft to lodge in thofe Parts of the Urethra ; 
which are within the Reach of this ftrait In- • 
ftrument. But if it fliould lodge a little be- 
yond the Turn at the Os Pubis y it might pro- • 
bably be pradicable to extrad them thence by 
bending this Inftrument, as the common Ca- 
theters are bent ; if the Stiller were Silver it 
would bend the more eafily. 
3y. Mr. Ranby is of opinion that this In- 
ftrumenc may be farther ufeful, in cafe of a 
Stridure or Contradion of any part of the 
Urethrdy viz. by thrufting the Forceps into 
that Stridure, where by continuing fome 
time, the conftanc Tendency of the Springs 
to dilate will widen the Stridure. 
THE 
