Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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main
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<
s
id
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s.002296
">
<
pb
pagenum
="
193
"
xlink:href
="
025/01/197.jpg
"/>
Si mercurius IC ſuſtinetur à cylindro exterioris aëris, igitur cum illo perfe
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ctum ęquilibria ſunt, igitur
<
expan
abbr
="
cũ
">cum</
expan
>
alio æquali pondere ad libram appenſo aliud
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lb
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<
expan
abbr
="
æquilibriũ
">æquilibrium</
expan
>
facere non poteſt; Supponamus enim
<
expan
abbr
="
Mercuriũ
">Mercurium</
expan
>
IC, eſſe trium li
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lb
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brarum, æquilibrium facit cum cylindro aëris etiam trium
<
expan
abbr
="
librarũ
">librarum</
expan
>
; ſi autem
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lb
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aliud pondus
<
expan
abbr
="
triũ
">trium</
expan
>
librarum in altera lance appendatur, cum hoc Mercurius
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æquilibrium facere nequit, alioquin ſex libris Mercurius Æquiponderaret
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quod legibus Staticæ repugnat. </
s
>
<
s
id
="
s.002297
">Et verò Mercurius CI ab aëris cylindro
<
expan
abbr
="
ſu-ſtẽtatus
">ſu
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lb
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ſtentatus</
expan
>
perinde ſe habet, atque ſi eſſet cylindrus vel embolus, qui nullo ne
<
lb
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gotio educi & immitti poſſet per
<
expan
abbr
="
fiſtulã
">fiſtulam</
expan
>
; ſed prædictus cylindrus digito v.g.
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lb
/>
ſuſtentatus fiſtulæ pondus non augeret; & hæc eſt ſecunda ratio; aperto
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enim foramine in D, inductoque embolo in cavitatem BC, ſi eum digito
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tantulum attollis, clauſo foramine in D, & fiſtula appendatur,
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præfatus cylindrus nullum pondus addit fiſtulæ; igitur, nec Mer
<
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curius CI, à cylindro aëris ſuſtentatus; cùm vtrimque par ſit
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ratio. </
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main
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<
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id
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s.002298
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<
emph
type
="
italics
"/>
Chryſoc.
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emph.end
type
="
italics
"/>
</
s
>
<
s
id
="
s.002299
"> Diceret fortaſsè aliquis, Mercurium contentum Segmento IC
<
lb
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gravitate in latera fiſtulæ; ſi enim fiſtula perforetur in L v.g. per foramen
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Mercurius effluit. </
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>
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<
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id
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s.002300
">
<
emph
type
="
italics
"/>
Antim.
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emph.end
type
="
italics
"/>
</
s
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<
s
id
="
s.002301
"> Scio, ita aliquos reſpondere; ſed hæc reſponſio, meo ſaltem
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judicio, nodum non ſolvit; quando enim latera vaſis ita non adhærent
<
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contento, quin ea liberè, ſine illo moveri poſſint, de primi ſcilicet, at
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que attolli, in ea certè corpus contentum non gravitat; quia non ob
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ſtant, quo minùs illud deorſum eat; hoc autem luculento experimento de
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/>
monſtro. </
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>
</
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>
<
figure
id
="
id.025.01.197.1.jpg
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xlink:href
="
025/01/197/1.jpg
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number
="
69
"/>
<
p
type
="
main
">
<
s
id
="
s.002302
">Sit Vas BAC oblongum, clauſum in C, apertum
<
lb
/>
in AB, plenum aqua, illudque ex ligno leviſſimo, &
<
lb
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valde craſſum; immergatur in aquam, donec ſit in
<
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æquilibrio, immerſo ſegmento DC, extante verò
<
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/>
Segmento DA, aqua contenta ſegmento DA, extans
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ſupra ſuperficiem aquæ GDF, eodem modo gravitat
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in latera vaſis CADB, quo Mercurius in latera præ
<
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/>
dictæ fiſtulæ; ſi tamen appendatur vas CA, in hoc
<
lb
/>
ſitu nullum pondus habet, quia ſcilicet ab aqua ſuſti
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/>
netur; nihilo tamen minus, ſi perforetur latus DB,
<
lb
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per foramen effluet aqua, ſicuti Mercurius per fora
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men apertum in fiſtula effluit. </
s
>
<
s
id
="
s.002303
">Sed alio experimento lu
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culentiore rem hanc explico: Sit vas HB continens Mercurium FB ſic tu
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bus ligneus oblongus, ex materia leviſſima, MC, vtrimque pervius, ſi
<
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imponatur altera eius extremitas C Mercurio, tantulum ſegmentum im
<
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mergetur; infundatur mox aqua in prædictum tubum, per os ſuperius M,
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lb
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donec proximè ad C Mercurij tubo contenti ſuperficies deprimatur, aqua
<
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/>
verò tubo infuſa aſſurgat in K ; denique appendatur tubus CM, nullam
<
lb
/>
profecto ponderis vim exerit, quia ſcilicet ſuſtinetur à Mercurio; immo
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lb
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ſi deprimatur infra C, ſurſum extruditur à Mercurio, æquali, vel potiùs
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eodem aquæ ſegmento ſemper extante; & ſi tantulum attollatur ſupra C, </
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