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# Title: Lexicon Technicum: Or, An Universal English Dictionary Of Arts And Sciences (shelfmarks Leibn. Marg. 71; ZEN Leibn. Marg. 71)
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melt, (as ic ill soon do) into a sine round lighr, or by looting chro a Imall HTole in apiece
foriger than rillit come in ies round Ficure, lest
charRoundness exactlr, bur Practice ill loon
learn rou theknack ofic; chey must be cleansed
Ot Paper, discern che Animalcula vrhichi nere in
it, excecdingly magnitrd; and ostentimes
Wvhen thic drop oF rtie Fluid ias round and velt
detined, very distinct and plain.
In N. 232. MIr. Cray gires a Furctiex Improre
alcervards by rubbins chem a while on Pote Lea menc ot his W’ater Microscopé.
cher. Pbilos. Fransact. IV. 141.
Those Microscopes that are malle vich sinele
Conrex Crlasses, must hare the Object placed in
One Fccus OF the Otals, (Or rather a licle nearer)
arid che Ere must be in ihe orher Focus on EIIEO
Ther side.
are ell made, do magnitie exccedinsy: Such
arc oux very Famous Mr. Mellen SCilasses, Wtich
A Descriprion of NIr. Marealls Double
MlicrolcoDe.
This MctoICoDe consists os Tbree Classes.
B. I che Corer, or Lid, 1o keex out Dult Tcomi
the LrC- StalSH.
X. Ischic PlacC For ihe Fye.
IV. A Scren Where che LYeClass lies.
A. 1. A Serew Wherertie Midale-Class lies.
1. 2: THC DFaW.
C. The Object Class six d in a BraIS BUION
to scre on Or OHt, 25 occation Perres.
Z. Thie Lrame or Balis on vohich ehe Miero-
Scope lCandS HFIHI.
L. ACinall Dratree in the Frame ox Basis, wirtr
a Ledge, or Till in it, havins Six Parririons
tohold (0mans several Object-Clalles, one
magnitrins more chan anocher, and fix d in
BraIS Cells ready r0 screW On aE C, ane
marked 1, 2, 3, 4, 5, 6. Thele Parritions
are allo marked
2n 3, 4, 5, 6. The orher part oErtie Drarver
serres to hold the Object- plate (2). A pair
oF small DipperS (B), rorake up, or handle
any Object conreniently. Anocher Object.
place (d), havins one side Whire, and che
Ocher Black, 20 Ex vour Objects uxon, a5
Black upon Whire, and Whire Objects on
Wohole Body ol elle ntoscopeis moreables
Choldins che Microscope) is continued.
turnins oF erhich Nuc L, (the CollarG. bC.
ing ArH AX d co the Pillar by chC SCTCW FY)
etic Mlicroscope is rais d up ox dovn on che
Pillar, and made rO come neareF, OF 90
Farctier trom rhie Object: And Whichis al
the Micros cope Is aass Repepespendicular
to chac point ot che Object, over which il
ras Arsc placed; (0 tharhere is nor the In-
convenience which occurs in orter Classes.
oF otren lolins che ligtt ot che Object, by
ceruue ie clle tiere et toner
The FyC-Gla(S H.
The Midalc. LaBS A.
And ihe Object Cla(sC.
Black.
T. MI. A BFaIS BalI and MCLRCL, M Wtrich the
Po asto lic in ary Polirion For the Lighr.
K. O. A Square BralS Pillar on which che MI
croscoprabe ux alu corn, by meane
of chic Collar F, inco which che ArM D.
C. Anocher BtaIS Collar Didins ux and donin
On che Pillax K. O. havins a small Screw IL
by irtrich it is; 2s occalion serres, txd Fast
to he laid Pillat, al dH) AICIBHE.
T. A larse Braissut, in Wr CcC I a LC
male Sctew, Auced 10 ihe Male SCFeW F
irhich is fix d in the Collar F: By che
Globule: Nou must hold ic in che Flame nO
rou burn ic: The onty disficuler is in sirins it
Thele kind of Microscopes, Wenesle Craltes
lbeliere, are the best of any in the World OE
this kind: And such are thore OF MIE. Lemen-
hoeck et Delsi in Folland, by wrtich (o man
Blea Discoreries hare been made.
Bulthere is morerhan one great inconvenience
in chele Glasses, viz. T0 magnitie muctu, the
Object must be (0 near, thac ic muse almost
couch che Cilals; tis a ress eee 
Object erue ro the Glass, and wrhen Acred c0 fIX
ic l0; and buc a very small part of ctic Object
can be scen at a rime. Bucchen ches beins con-
criredro Calts inthe Packet, are very reads,
and rill de et rast ule on mans Occalions.
LHC Bett Classes oF chis kind chac eres Llaw
are made by the abore mentioned MV. Mellens.
eoho formerly lired in Abchurch- Lane.
In Philos. Transact. IV. 42. IS an accoune OF 2
Microscope ot Fustach. Divini, (wtrich is alio rrea-
red oF DY Taber in his OptiCKS (PrOP. 40.) and
Which LPare in lome meature experimentea ny
SelF 10 be a verr 800d Method ot disposins ThC
Glares. Hle ules, instead oF a common aoUBIC
Corre Lyc olats, tro Plano CMirek Mes,
wtrich arc (0 placed as eo touch one anochet M
the midale ot their Conrex surtace. By WH
means i Clals ill cake in more ot als escll
will sepreleme ic Aac and noc crooked, and vill
mascutie 2I50 (25 chey call IE) verr MMCH. LIIIS
Claishad four sereral Lenochs (made by DraWVS)
ac ce least Lenorh, Wrhich was 16 Tuches, ic
magintied Lines Ar cimes bisget chan cher ap-
pear loe nared fire; ac ilse second Lensth90
rimes; ac che chird Lenoch ex rimes; ac Ehc
fouech Lengch 143.
AS tothe Method ot matrins che Tame Clals
magnitie differentr, at differene Lengchs;
NIr. Marstal hach broughe ir to bear verr ellin
tis Imail Pochet Microscopes; and chis ltake t0
De 2 800d Improrement, wrhich he hach added
co the Classes or Campani, which are made alues
thatmanner, but wich onty one Destle oF Mag-
nitvins wrich one and che lame Cla(s.
In Philos. Fransact. DI. 22Y. There is an AC.
ConnE oF several Microlcopical FZperiments, by
Oe MIF. Stephen Gray; Where he speales ot ma-
Kinq Microscopes ich a Globule oF Wacer onIY,
Duc inro an LIole made in a (mall Brals Plate.
Wtich I my selt have otcen eried; and vell se
noc tor che cremblins Morion ot e el 
vould do rerr wei
Ee saich also, Thac by applrins a linall Glo-
bule oF Pepper WVarer, (9c. to his bare Pye, (1. c.
br sixins ic on the Surtace oF his Fye) he could,
in a dactered R0Om, bY C andle Lishl, or HoOn.
(0 a VerY OrCAE AaVAHILaGCS CHC HAL BF