xx Hhe Microfcope explained. 
the number of the magnifier then in ufe, the diftance 
of the magnifier from the objedt will be nearly right^ 
fix it by tightening the fcrew f, after which you may ad- 
juft it to fit your fight, by turning the mild head c of 
the fcrew e g. 
p q is the ftage or objedt carrying plate, with a hole 
in its center at n ; G is a mirror, that may be turned 
into any direction, fo as to refiedf the light of the Iky, 
the fun, or a candle under the objedf. 
H, a convex lens, for illuminating opake objects ; L 
is a cilindrical tube open on each fide, a concave filver 
fpeculum h is ferewed to its lower end. This cylinder 
is to be put over the fnout E C, when an opake objedt 
is to be examined, and its upper end fet to the number 
of the magnifier in ufe, then the light will be thrown 
upon it by the mirror G, will be returned back upon that 
fide of the objedf next the eye of the obferver. 
P is a cylindrical tube, in which an inner tube is 
forced upwards by a fpiral fpring. Its ufe is to receive 
ah ivory Aider K, in which objedfs are preferved between 
two mofeovy talcs, or a glafs Aider, upon which any 
cafual objedt may be laid: either of thefe are to be put 
between the plates h and i, and the cylinder P put into 
the hole n in the ftage. The hollow at k is to receive 
a . glafs tube N, in which is confined a finall water ani¬ 
mal, to ftiew the circulation of the blood : x is a wier 
fcrew, to afiift in cleaning the tubes, or to difeharge 
their contents. 
R a cone to be put on under the bottom of the cy¬ 
linder P, its ufe is to intercept fome of the rays of light, 
when the firft and fecond magnifiers are ufed. 
S, a box containing a concave and plain glafs, between 
which may be confined any fmall living infedt, which 
being placed over the middle of the ftage, may be eafily 
examined. 
T ' 
