Fabri, Honoré
,
Tractatus physicus de motu locali
,
1646
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<
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<
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<
chap
id
="
N24CC8
">
<
pb
pagenum
="
373
"
xlink:href
="
026/01/407.jpg
"/>
<
p
id
="
N26EB2
"
type
="
main
">
<
s
id
="
N26EB4
">Decimoſextò, antequam quieſcat turbo, inclinatur, ſuoſque orbes agit
<
lb
/>
inclinato quaſi corpore, & obliquo axe; </
s
>
<
s
id
="
N26EBA
">ratio eſt, quia vel axis ſeu ferreus
<
lb
/>
mucro tantillùm abeſt à grauitatis centro, vel aliquis plani ſcopulus, vel
<
lb
/>
decliuis plaga turbinem ipſum inclinat; agit tamen adhuc aliquot obli
<
lb
/>
quos gyros propter vim prioris impetus, quæ ſenſim à grauitatione tur
<
lb
/>
binis frangitur, & tandem omninò ſuperatur. </
s
>
</
p
>
<
p
id
="
N26EC6
"
type
="
main
">
<
s
id
="
N26EC8
">Decimoſeptimò, hinc, vbi terrarum tangit depreſſus turbo, ad inſtar
<
lb
/>
rotæ deindæ rotatur; ratio eſt, quia multus adhuc remanet impetus ad
<
lb
/>
motum orbis determinatus, qui vbi tangitur, ſolum trochum ipſum cum
<
lb
/>
centro ad inſtar rotæ præcipitem agit. </
s
>
</
p
>
<
p
id
="
N26ED4
"
type
="
main
">
<
s
id
="
N26ED6
">Decimooctauò, hinc vides naturam maximè gaudere motu recto qui
<
lb
/>
paulò ante turbini erecto minimè concedebatur; cur enim in vnam po
<
lb
/>
tiùs partem, quàm in aliam? </
s
>
<
s
id
="
N26EDE
">at verò lapſo iacentique facilè permittitur;
<
lb
/>
nam in plano motus orbis rotæ facilè determinat motum rectum
<
lb
/>
centri. </
s
>
</
p
>
<
p
id
="
N26EE6
"
type
="
main
">
<
s
id
="
N26EE8
">Decimononò, ad turbinem reuoco cubum illum, ſuis numeris vel
<
lb
/>
characteribus inſtructum, & duobus hinc inde in ſuprema, & ima facie,
<
lb
/>
quaſi paxillis, vel communi axe munitum, cuius figuram hîc habes; vol
<
lb
/>
uitur enim hic cubus circa ſuum axem, neque eſt noua difficultas. </
s
>
</
p
>
<
p
id
="
N26EF2
"
type
="
main
">
<
s
id
="
N26EF4
">Vigeſimò, huc etiam reuoca fuſum, qui dum turbinatim verſatur, di
<
lb
/>
uerſis etiam motibus moueri poteſt ſurſum, deorſum, dextrorſum, ſini
<
lb
/>
ſtrorſum, ïta vt in eo mira motuum varietas obſeruari poſſit. </
s
>
</
p
>
<
p
id
="
N26EFB
"
type
="
main
">
<
s
id
="
N26EFD
">Vigeſimoprimò, reuocabis quoque motum paropſidis, dum digito
<
lb
/>
quaſi flagellatur; eſt enim quoddam turbinationis genus, cuius ratio
<
lb
/>
facilis eſt, & conſtat ex dictis. </
s
>
</
p
>
<
p
id
="
N26F05
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type
="
main
">
<
s
id
="
N26F07
">
<
emph
type
="
center
"/>
<
emph
type
="
italics
"/>
Theorema
<
emph.end
type
="
italics
"/>
31.
<
emph.end
type
="
center
"/>
</
s
>
</
p
>
<
p
id
="
N26F13
"
type
="
main
">
<
s
id
="
N26F15
">
<
emph
type
="
italics
"/>
Explicari poſſunt phœnomena
<
emph.end
type
="
italics
"/>
<
emph
type
="
italics
"/>
motus Excentricorum
<
emph.end
type
="
italics
"/>
; </
s
>
<
s
id
="
N26F24
">ſit circulus ALK
<
lb
/>
M centro E; </
s
>
<
s
id
="
N26F2A
">ſit alius excentricus ACOD centro B, circa quod mouea
<
lb
/>
tur punctum A v.g. motu orbis; </
s
>
<
s
id
="
N26F32
">Primò, nulla erit inæqualitàs motus, ſed
<
lb
/>
tantùm videbitur eſſe; </
s
>
<
s
id
="
N26F38
">nam
<
expan
abbr
="
punctũ
">punctum</
expan
>
A, in quo ſit aſtrum poſt decurſum
<
lb
/>
quadrantem; </
s
>
<
s
id
="
N26F42
">videbitur in N; </
s
>
<
s
id
="
N26F46
">igitur videbitur tantùm confeciſſe arcum A
<
lb
/>
N minorem quadrante; </
s
>
<
s
id
="
N26F4C
">hinc motus ab A ad C indicabitur tardior; </
s
>
<
s
id
="
N26F50
">at ve
<
lb
/>
AC ad O videbitur velocior; </
s
>
<
s
id
="
N26F56
">quia credetur confeciſſe arcum maiorem
<
lb
/>
NK, æquali ſcilicet tempore, quo AN; </
s
>
<
s
id
="
N26F5C
">hinc ab A ad C, id eſt ab apogæo
<
lb
/>
dicitur eſſe tardior; vel ocior verò AC ad I, id eſt ad perigæum, ſed hæc
<
lb
/>
ſunt facilia, & communia, per quæ explicantur anomaliæ, & inæquali
<
lb
/>
tates ſimpliciores motuum cæleſtium. </
s
>
</
p
>
<
p
id
="
N26F66
"
type
="
main
">
<
s
id
="
N26F68
">Secundò, ſi voluatur circulus radio AE circa centrum E, nec ſit vllus
<
lb
/>
motus circa centrum B; haud dubiè omnes partes excentrici ADOC
<
lb
/>
mouebuntur motu circulari ſed inæquali, vt patet. </
s
>
</
p
>
<
p
id
="
N26F70
"
type
="
main
">
<
s
id
="
N26F72
">Tertiò, ſi ſit motus circularis circa vtrumque centrum; certè centrum
<
lb
/>
B circumagetur per circellum BGHF, punctum verò A excentrici
<
lb
/>
deſcribet hanc lineam APIQBSIRA, vt conſtat ex dictis Th. 30.
<
lb
/>
num. </
s
>
<
s
id
="
N26F7C
">30. </
s
>
</
p
>
</
chap
>
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body
>
</
text
>
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