24 Of the Solar, or 
ufual Manner, take away the Lens at the 
other End thereof, and place a Slider, con¬ 
taining the Objedt to be examined, between 
the thin Brafs Plates, as in the other Ways 
of ufing the Microfcope. 
Things being thus prepared, fcrew the 
Body of your Microfcope to the fhort Brafs 
Tube F. which flip over the fmalleftEnd E. 
of the Tube D. and pull out the faid Tube 
D. lefs or more, as your Objedt is capable of 
enduring the Sun's Heat. Dead Objedts 
maybe brought within about an Inch of the 
Focus of the convex Lens, 5 ; but the Dis¬ 
tance mull be Shortened for living Crea¬ 
tures, or they will Loon be killed. 
If the Light falls not exadtly right, you 
may eafliy, by a gentle Motion of the joint¬ 
ed Wire and Fully, diredt it through the 
Axis of the microfcoptic Lens. 
The fhort Tube F. which your Micro- 
feope is ferewed to, enables you, by Aiding 
it backwards or forwards on the other Tube 
E. to bring your Objedts to their true focal 
Diflance ; which will be known by the 
Shar-pnefs andClearnefs of their Appearance: 
they may alio he turned round by the fame 
Means, without beinginthe leafldifordered. 
The Magnifiers mod ufeful in the Solar 
-Microfcope are, in general, the fourth, 
fifth, or fixth. 
Mention having been often made of a 
Screen to throw the Images of Objedts on, 
it 
