14 Of the Pocket Microscope 
CHAP. IV. 
A new Invention for fixing the Pocket 
Microscope, and giving Light to it by 
a Speculum. Plate II. 
I N this Plate, A is a Scroll of Brafs, fixed 
upright on a round Pedeftal of Wood 
B, fo as to hand perfectly firm and Heady. 
C. is a Brafs Screw, that paffes through 
a Hole in the upper Limb of the Scroll, 
into the Side of the Microfcope D, and 
fcrews it fail to the faid Scroll. 
E, a concave Looking-glafs or Speculum* 
fet in a Box of Brafs, which hangs in the 
Arch G, by two fmall Screws ff that fcrew 
into the oppofite Sides thereof. 
At the Bottom of the faid Arch is a Pin 
of the fame Metal, exadly fitted to a Plole 
b, in the wooden Pedeftal made for the Re¬ 
ception of the faid Pin. 
As the Arch turns on this Pin, and the 
Speculum turns on the Ends of the Arch, it 
may, by this twofold Motion, be eafily ad- 
■jufted, in fuch a manner, as to reded the 
Light of the Sky, the Sun, or a Candle, 
diredly upwards, thro’ the Microfcope that 
is fixed perpendicularly over it ; and, by fo 
doing, may be made to anfwer almofl all 
the Ends of the large Doable Refolding Mi - 
crofcope , which I fhall prefenfly defcribe. 
•The 
