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tfhe Microfcope explained. 
ABC, fig. I and 3, reprefent the body of theynicrof- 
cope which contains two eye glades at A, a third near 
B, and a fourth in the conical part between B and C, 
the end C fhews one of the magnifiers fcrewed thereto. 
Hence the body of this microfcope, confiding of five 
glades, greatly exceeds the ufual compound microfcopes 
which have only three, by increafing the field of view 
and of light, as well as affording an occafional opportu¬ 
nity of increafing the magnifying power of each particu¬ 
lar lens, or magnifier - y this is performed by pulling up 
the part A E which feparates at A j there is likewife 
another feparation at B, by pulling up the outward tube 
A B. 
Another advantage attending this indrument is, that 
any two of the magnifiers may be ufed at the fame time, 
as follows, fee fig. 3. fcrew the button b to the part c 
of the button a, and both together into the body at c, 
the magnifier reprefented at c being firft removed. 
There are feven of thefe buttons reprefented at a and 
b, with magnifiers in them, alfo fix diver fpecula highly 
poliihed, each having a magnifier adapted to the focus of 
its concavity, one of thefe is reprefented at e; when ufed 
they are to be fcrewed into the body of the microfcope at 
c, every one of the feven magnifiers in the buttons a, b, 
may be ufed with any one of thefe fpecula, by fcrewing 
the lower part of the fruftrum of a cone, which is feen 
at d, upon the prominent fcrew on the diver fpeculum 
at e, and then fcrewing the part c of any button b into 
its upper end, and altogether into the body of the microf¬ 
cope at c. 
Note, thefe magnifiers are numbered, 1, 2, 3,, &c„ 
and the lead number is the greateft magnifier. 
The body of the microfcope ABC is fupported by 
an arm F, into which it may be put or taken out occa- 
donally, and fattened by the fcrew at f; this arm is fixed 
to the bar G G, which may be railed or depretted by 
turning 
