The Prerace, 
wex Objext GlaG,with the convex fide towards the Obje&, and into the 
bigger end I fixt alfo with wax a pretty large. plano: Caeass Glafs, with. 
the convex fide towards my eye, then by means of the {mall hole 
by thefide, 1 fill'd the intertnediate {pace between thefe ‘two Glafles 
with: very. clear Water, and.with \a Screw. ftopp’d.itin 5. then’ pat 
con 
onaCell forthe Eye, I could perceive an Object nore bright,then 
when the intermediate {pace was only | fill'd with Air, but fect d for — — 
cOhveniences, Imadé but little ue of) 
~My way for ei -both the Glafs:and Ob ject e ie Pedeftal mf conven 
piently was thus: Upon, one fide of a round Pedeftal A B, \in the Axth Fi2 
gure of the firlt aba, as fixt'a final! PilkirtOG;on this was'ftced a final 
Iron Arm D, whichcould) peimav dup: and de and fixt in. any par f th 
Pill ar by: means. i fmiall Scre £3 onthe end ct this Arm was all B i 
tat into a kind ‘ F focket Fj rhadé inthe fide of the BraliRing'G, 
which the finall\:¢nd»of the Tube owas tenew'di5, by, means of which contria 
vance could place and fix: whe. Tube.in, what pofture I defir’d ( which, for 
many Obfervations was — ling pecellaty 7 and ad julten it mott aon 
ro any Objed. | 
sion ahiting the Objet, I ride this eontrivances npon thes f nd.of a fall 
brafs Link or Staple H H, I, fo. faftned a round, Plate I Ez cag it might be 
tiirn'd round upott’ its Center K; ; and going’ pretty {Hit} would ftand 
fixt in any poftureitiwas fers onthe fide of: athe Was fixt\a, (mall Pillar\P,, 
about three quarters of an.inch high, and through the top of this was thruft 
a {mall Iron pinM, whofétop. juft Pitch avabrhe 
this top Ifixt a fmall O jel “ahd by nitans of theft contrivances I was able 
to turmit icogliirint er pofitions, both to my. xeand che biahea fOr bx 
moving round th 1 Plate gnits cente ,{ could move it one way, and 
turning the PinM} I’ could'mave it another way, and this without firing 
the Glafs at all, oratleaftbut very little: the Plate likewife I could, move 
to and.fro to any, part of the Pedeftal ( which in.many cafes was very con- 
venient.) snake it alfo in any Pofition, by meansof a Nut N, which was 
fcrew'd on upon thé lower part of the Pillae CG., All the other Cons 
trivago are obvious enough from the, draughtjand \ will need no -defcription 
© Now though this were the: Inftrumeint Imade:snoft fe of, yet £ have 
wt , feveral other Tryals with orber kindsof Micro{copes,.. "phic bth 
formatter and form were very different. from common |pberical Glaffes, 
Ihave made a Microfcope with one piece of Glas, ‘both whofe jfurfaces 
wereplains. © I'bitve made another only with a plano contave, without 
any kind of reflettion; divers ao by means of ‘refleétion. » EBave made 
e Cénter of the Plate 5 on 
1 
| 
i 
others® of Waters, ‘Gums, Refins', Salts; Arfenick, O yls, and with | 
divers otber mixtures of watery iid oyly Liquors.’ Andindeed the 
fubjett74 capable of 4 great variety ;“but'T find generally woe more fe 
‘ful then that which is made with two Glalles, fuch: aT have already de- 
ford. | | gs 
- oe 
