28 Of the Microfcope 
The Apparatus for this Purpofe (as in the 
Plate, Numb. IV.) has afforded me more 
Delight and Satisfaction than I am able to 
defcribe ; and whoever tries it, will, I believe, 
join in my Opinion, that he never before 
faw an opake ObjeCt with fo much Clear- 
nefs, and in fo perfedt and true a Manner. 
The feveral Parts of this Indrument, made 
either of Brafs or Silver, are as follows. 
Through the f rd Side A. paifes a fine 
Screw B. the other End whereof is faden- 
ed to the moveable Side C. 
D. is a Nut adapted to the faid Screw, 
by the turning of which the two Sides A.C. 
are gradually brought together. 
E. is a Spring of Steel, that feparates the 
faid two Sides when the Nut is unfcrewed. 
F. a Piece of Brafs turning round in a 
Socket, whence proceeds a fmall Spring 
Tube moving upon a Rivet, through which 
Tube there runs a Steel Wire, one End 
whereof terminates in afharp Point G. and 
the other hath a Pair of Plyers H. fadened 
to it.—The Point and Plyers are to thrud 
into or take up and hold any Infedt or Ob¬ 
ject : and either of them may be turned up¬ 
wards, as fuits your Purpofe bed. 
I. a Ring of Brafs, with a female Screw 
within it, mounted on an upright Piece of 
the fame Metal, which turns round on a 
Rivet, that it may be fet at a due Didance 
when 
