Fabri, Honoré
,
Tractatus physicus de motu locali
,
1646
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<
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N22A20
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<
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pagenum
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301
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xlink:href
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026/01/335.jpg
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illæ obſeruationes eſſe poſſunt, quæ ſenſibiles non ſunt, ſiue aures con
<
lb
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ſulas, quæ ſonum excipiunt, ſiue oculos, qui motum ipſum obſeruant. </
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<
s
id
="
N22DC2
">
<
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Tertiò, ſi oculos conſulis; num ipſi potiùs vident motum vibrati pendu
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lb
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li eſſe tardiorem, quàm demiſſi per lineam perpendicularem? </
s
>
<
s
id
="
N22DC9
">nec alius
<
lb
/>
nodus hic ſoluendus eſt, nec aër ſenſibiliter pilæ plumbeæ reſiſtit, nec
<
lb
/>
minùs reſiſtit motui circulari quàm recto. </
s
>
<
s
id
="
N22DD0
">Denique compertum eſt à me
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lb
/>
in longiore pendulo motum in arcu eſſe tardiorem, quàm in perpendi
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lb
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culo: </
s
>
<
s
id
="
N22DD8
">nodus obſeruationis facilis eſt, nam adhibui AE planum durum
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lb
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reſpondens accuratè perpendiculari, cui aliud planum E
<
foreign
lang
="
grc
">β</
foreign
>
ad angulos
<
lb
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rectos affixum erat
<
expan
abbr
="
reſpõdens
">reſpondens</
expan
>
Tangenti; </
s
>
<
s
id
="
N22DE8
">tùm demiſſo ex A globulo plum
<
lb
/>
beo ſimulque alio æquali pendulo ſcilicet circa A ex N per NE; </
s
>
<
s
id
="
N22DEE
">ex quo
<
lb
/>
accidit citiùs auditum eſſe ictum globi cadentis perpendiculariter, quàm
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lb
/>
vibrati per arcum NE: quis autem hoc non videat, ſiue ſenſum ipſum,
<
lb
/>
ſiue rationem conſulat? </
s
>
<
s
id
="
N22DF8
">fuit meum pendulum 12. pedes longum. </
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>
</
p
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<
p
id
="
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"
type
="
main
">
<
s
id
="
N22DFD
">Quæreret aliquis primò quanta fuerit differentia temporum Secundò,
<
lb
/>
quanto tempore globus pendulus ex N in E peruenerit. </
s
>
<
s
id
="
N22E02
">Reſpondeo inu
<
lb
/>
tilem eſſe quæſtionem; </
s
>
<
s
id
="
N22E08
">nec enim minimas illas temporum differentias
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lb
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ſenſu metiri poſſumus; </
s
>
<
s
id
="
N22E0E
">ſi enim affirmarem cum nonnullis corpus graue
<
lb
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per medium liberum 12. ſpatij pedes conficere vno temporis ſecundo; </
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>
<
s
id
="
N22E14
">
<
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certè ſi quis contenderet vel deeſſe, vel ſupereſſe 1000. inſtantia; quonam
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argumento, vel experimento contrarium euincere poſſem? </
s
>
<
s
id
="
N22E1B
">quod certè
<
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dictum eſſe velim, vt vel inde oſtendatur in caſſum laborare eos, qui
<
lb
/>
hanc ſcientiam his tantùm experimentis confirmant, quæ circa inſenſi
<
lb
/>
bilia verſantur. </
s
>
<
s
id
="
N22E24
">Equidem magnifacio in rebus phyſicis experimentum,
<
lb
/>
ſine quo nulla hypotheſis eſſe poteſt; </
s
>
<
s
id
="
N22E2A
">at modo ſenſibile ſit, alioqui cer
<
lb
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tum eſſe non poteſt; </
s
>
<
s
id
="
N22E30
">ſi autem ſenſibile eſt, omnibus commune eſſe debet,
<
lb
/>
sum ſenſus applicent; </
s
>
<
s
id
="
N22E36
">igitur nunquam vir prudens ſeſe accinget ad in
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lb
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dagandam rationem alicuius experimenti, quod certum eſſe non poteſt: </
s
>
<
s
id
="
N22E3C
">
<
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vnde ſi quis omnes obſeruationes, tùm à Plinio, tùm à Cardano, tùm à
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lb
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Fracaſtorio, tùm à Porta, tùm ab aliis propoſitas ad principia phyſica re
<
lb
/>
ducere velit, per me ſtat, non contradico; numquam tamen illa mihi
<
lb
/>
mens erit, cui ſatis eſt rationes, & cauſas phyſicas illorum tantùm expe
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lb
/>
rimentorum explicare, quæ mihi certa ſunt, ſuntque omnibus commu
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nia, vel eſſe poſſunt. </
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type
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Theorema
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4.
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id
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">
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emph
type
="
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"/>
In motu funependuli ſingulis instantibus eſt noua determinatio motus.
<
emph.end
type
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italics
"/>
</
s
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<
s
id
="
N22E63
"> Pro
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batur, quia ſingulis inſtantibus eſt quaſi nouum planum; </
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>
<
s
id
="
N22E69
">tot ſunt enim
<
lb
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plana in quadrante NE, quot Tangentes, & tot Tangentes quot pun
<
lb
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cta, tot denique puncta, quot inſtantia; </
s
>
<
s
id
="
N22E71
">atqui in ſingulis nouis planis
<
lb
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mutatur determinatio; </
s
>
<
s
id
="
N22E77
">igitur in ſingulis punctis; igitur in ſingulis in
<
lb
/>
ſtantibus. </
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>
</
p
>
<
p
id
="
N22E7D
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type
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">
<
s
id
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">
<
emph
type
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"/>
<
emph
type
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italics
"/>
Scholium.
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emph.end
type
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type
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</
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id
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type
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<
s
id
="
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">Obſeruabis eſſe aliqua Lemmata præmittenda antequam proportio
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nes motus per arcum NE demonſtrentur. </
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>
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