*The Mkrvfcope explained. xxxi 
from the fpeculum ftrongly upon the objedt ; by which 
means it will appear very diftindt and clear. 
The aquatic microfcope, ufed by Mr. Ellis la 
his difcoveries on corallines. * 
T HIS microfcope is very Ample in its conftruction, 
eafy to manage, and very portable, as it lies flat- 
in the pocket. 
A, fig. 15. the brafs pillar that fcrews into the top 
of the box K, this box contains the whole apparatus. 
H, the fliank and femicircle, in which the concave 
mirror moves on the two axis, at I, I. 
D, the Aiding pillar to adjuft the filver difh with its 
lens at F F, to their proper focal diftance. Note, this 
pillar D is now made to Aide through the middle of 
the pillar A, for the convenience of being put into a 
lefs compafs. 
G, another filver fpeculum with a higher magnifier. 
E, the arm that fupports the filver fpeculum, is made 
to Aide backwards, forwards, and Tideways, fo as to view 
all parts of any objedts that may be laid upon the if age B. 
C, a plain glafs placed on the ffage, with a black 
patch upon it for opake objedts, and alio to lay all other 
kind of objedts on, whether they be tranfparent or 
opake. 
M, a vvatch-glafs to be placed on the flage B, infiead. 
of the plain glafs C, for aquatic objects. 
L, the nippers pointed at one end for different ob¬ 
jects, or to receive on the pointed end the ivory cylinder 
N, for opake objedts. 
O, pincers to take up fmall objedts. 
P, the brufh to clean the glaffes. 
I« 
* See Ellis’s eflay towards a natural hiltory of corallines. 
