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Plano-convex Lens ; G H another Screw fattening 
on the hollowCylinder EF I K(in which theDioptric 
Glafles are contain’d) to the Body of the Micro- 
fcope ; I K a Gap with a fmall Perforation, ferving 
as an Aperture to the Eye-Glafs, or zd Lens (con- 
vex on both Sides) ; M L is a long Screw patting 
through the Nuts P and V, ferving to bring the fmall 
Speculum to a proper Diftance from the larger ; 
N Qa Hiding Piece mov’d by the Screw, carrying the 
Stem Q_R, and little SpeculumCD, YX a Screw for 
the Cap at Fig. 3 ; that at Fig. 4, is to be fcrewed 
on the Aperture I K. 
Fig. 5. Shews the Conftrudion of the Micro- 
fcope, in which i is an Object fuppofed ered ; from 
which Rays falling on the Speculum a b> will be 
refleded to the Focus k , where they will form an 
inverted Image, and being refleded by the fmall 
Speculum c d, they will pafs through the Perfora- 
tion of the great Speculum , and falling on the Pla- 
no-convex Glafs ef, converge again, and form an 
erect Image at l\ which being brought very near to 
the Eye, and fo confiderably magnified, will be 
diftindly feen through the Eye-Glafs g h. 
II. An 
L 1 % 
