20 c Tbe Double Rejle&ing Microfcope. 
dining Pieafure ; and by placing it over the! 
Hole M. in the Middle of the circular Brafs' 
Plate, they maybe viewed with much Con- 
veniency.- - -Three loofe Glafles-, vigh one 
plain, and two concave, belong alfo to this 
Microfcope, and are defigned to confine 
Objedts, or place them, upon occafionally, 
P^ e l° n g Steel Wire 3. with a Pair of 
Flyers at one End, and a Point at the other, 
to hold fad, or flick Objedls on, flip back¬ 
wards or forwards in a Brafs fhort Tube, 
whereto a Button is fattened, which fits 
irito the little Hole z 9 near the Edge of the 
Brafs Plate L : and, then, the ObjedI may 
be readily brought to a right Pofition, and 
a Light be cafl upon it, either by the Look- 
ing-glafs underneath, or, if it be opake, by 
the plano-convex Lens V. 
4. is a flat Piece of Ivory called a Slider, 
with four round Holes through it, and Ob- 
jetls placed in them between Mufcovy Talcs 
or liinglafs, kept in by Brafs Wires. 
It is proper to have a Number of thefe 
Sliders filed with curious Objedls, always 
ready, as well as fome empty ones, for any 
new Thing that offers. When made ufe of, 
thrufl them between the Brafs Rings of 
tne Contrivance on purpofe for them, N. 
which fhoots into the round Hole M. in 
the Center of the Brafs Plate L* This 
keeps them heady, and at the fame time 
permits them to be moved to and fro for a 
thorough Examination, 
A little 
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