xxxviii The Microfcope explained. 
t, A little hair-brufh or pencil, wherewith to wipe 
any dud from off the glades, or to take up any final} 
drop of liquid one would examine, and to put it upon 
the glafs R. 
The microfcope being placed on a table near the win¬ 
dow, diredt the mirror F towards the fky, and then 
looking through the eye-piece N upon the objedt, placed 
next under the plate I, turn the illuminating glafs F, 
fo about upon its fupport H, and joint y, till the light 
is refiedted upwards to the objedt. 
When an opake objedi is to be viewed, place the re- 
fledling fpeculum O, exadily under the eye-piece N; 
fig. 18. and fix your objedt either on the point of the 
Hiding wire 1, in the plyers m, in the brafs hollow box 
X, or on the objedt plate W, then apply this whole ap" 
paratus mark’d V, to the microfcope, by putting its 
Hem n into the hole L of the pillar E, the object car¬ 
rying plate being firft removed. 
This microfcope maybe applied to the folar apparatus, 
by fcrewing the foot D of the finiverfal microfcope. fig. 
18. upon the end of the tube M, fig. 4. as before di¬ 
rected, in the defcription of the folar apparatus. 
The univerfal double microfcope. 
/"'STIII8 microfcope fig. 20. is compofed of three double 
JL convex lenfes, two of which are placed in the 
body thereof at a and b, and the magnifier at g, fix of 
which belongs to this microfcope, and are fixed in a 
fcollop’d plate M, M, M, moveable about a center at f, 
by which means either of them may be readily turn’d 
under the other two glafies, as at g, whereby the trouble 
of fearching out for different magnifiers is remov’d. 
The body of the microfcope is fupported by the arrq 
X? Jiaying a circular collar, whereinto it may be fcrew- 
ed* 
