[ 1 
the Leg B, which Leg B is a Conti- 
nuation of a Wire , that runs through 
the Lube C D, and is f aft ened to the 
Handle H, and turns with it. 
XXVII. A Defcription of Needles made for 
Operations on the Eyes, and of fome Inftru- 
merits for the Ears, loy the Same . 
T HE firft differs from a common Couching- 
needle, [JTab. VII. Fig. 3-d in this, that it is 
made of Two Pieces of Steel foldered together, and 
fixed in a Handle [ Fig . 4.] : At a little Diftance from the 
Handle they feparate, and have ; in each Lamina , a 
Button fixed, which paffes through a Hole in the 
other s from this Part to the Points, they are fo nicely 
applied, and polifhed together, that they cut, and have 
the Shape of a common Needle : Upon prefling the 
Buttons, the Points are feparated, and in the Infide of 
the broad Part of the Points arefeveral fmall Indents, 
to prevent any thing from flipping, after it has once 
got hold. 
The Ufe of this Needle is, either to deprefs a Ca- 
taraft ; or, if it fhould be found of fuch a Nature as 
to bear to be taken hold of, then, by opening the 
Points, to engage it, and carefully bring it out of 
the Eye. 
If it fhould happen, that in deprefling theCatarad, 
or in bringing it out of the Eye, fome of the fmall 
Veffels are wounded, and fome Drops of Blood diffufe 
themfelves in the aqueous Humour ; this fecond 
Needle [Fig. 5-] is made with Defign to remedy this 
Inconveniency. It 
