xxxiv *The Microfcope, explained\ 
No. 7. is a body containing two lenfes, by the help of 
which this inftrument becomes a compound microfcope* 
and is to be applied as follows ; fcrew the part a, of the 
magnifier, No. 6. into the ring fg, of fig. 16. then 
fcrew the end e of the body, into the female fcrew in 
the upper part of the button which contains the mag¬ 
nifier,, 
When either of the filver fpecula are applied to the 
body, No. 7. remove the ring f g, and put in a larger 
which is among# the apparatus in the box. Then fcrew 
the double microfcope above, and the filver fpecula un¬ 
derneath it. The body of the microfcope may be 
lengthened, by putting up the tube a b, out of its cafe 
cd. 
No. 16. is a hair pencil to clean the glades, and No. 
17, a pair of forceps to take up any frnall objedf; the 
fcrew No. 4. is to fix the oval plate A B C, to a wooden 
foot, by the hole at D; or it may be fcrewed to a table 
by the other fcrew No. 4. 
The univerfal fmgle microfcope. 
IG. 18. When it is firft taken out of its box, the 
Jl two legs A, B, are to be turn’d about upon 
joint C, till they make an equilateral triangle with the 
fixed leg D, then will the pillar E, be fupported in a, 
perpendicular pofture. 
F, is an illuminating glafs, for refiedfing the light of 
the fky, the fun, or a candle, upon the objedb : its fup- 
port H, is to be put into a hole, in the center of the 
round piece G, 
The objedt-bearer I, with its fprings b, and Aider 
K, has a fquare ftem behind the Aider, which is to be 
put into the hole at L, in the upright pillar E. 
MMM* 
