Fabri, Honoré
,
Tractatus physicus de motu locali
,
1646
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<
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N270EE
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<
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pagenum
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395
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xlink:href
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026/01/429.jpg
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<
p
id
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N28163
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type
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main
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<
s
id
="
N28165
">Obſeruabis autem primò ratione ponderis H, quod ſuſtińetur, aliquid
<
lb
/>
impetus detrahendum eſſe. </
s
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<
s
id
="
N2816A
">Secundò, vt accuratè procedatur vtrumque
<
lb
/>
fuſtem funependulum eſſe poſſe. </
s
>
<
s
id
="
N2816F
">Tertiò, ictus eſſe vt impetus; impetus
<
lb
/>
verò in ratione ſubduplicata ponderum, hoc eſt, vt radices quadratas. </
s
>
<
s
id
="
N28175
">
<
lb
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v.g. fuſtis maior pendit 36. libras, minor 4; </
s
>
<
s
id
="
N2817C
">ictus maioris eſt ad ictum
<
lb
/>
minoris vt 6. ad 2. Quartò, denique plures partes percuti à maiore
<
lb
/>
fuſte, cuius baſis latior eſt, nec tam facilè comprimi, nec ipſum fuſtem
<
lb
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incuruari; ac proinde minùs ictui detrahi, ſed de his ſatis. </
s
>
</
p
>
<
p
id
="
N28186
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type
="
main
">
<
s
id
="
N28188
">Septimò, ſi fuſtis cæſim impingatur, maiorem ictum infligit. </
s
>
<
s
id
="
N2818B
">Primò,
<
lb
/>
non circa extremitatem ſed circa 2/3, vt demonſtrabimus infrà. </
s
>
<
s
id
="
N28190
">Secundò,
<
lb
/>
quò maior eſt arcus fuſtis eſt maior ictus; </
s
>
<
s
id
="
N28196
">ratio patet ex dictis; cùm ſit
<
lb
/>
motus acceleratus. </
s
>
<
s
id
="
N2819C
">Tertiò, poteſt hic motus totum implere orbem, ſiue
<
lb
/>
fieri auerſa, ſiue aduerſa manu. </
s
>
<
s
id
="
N281A1
">Quartò, auerſa manu impactus fuſtis ma
<
lb
/>
iorem ictum infligit, quia brachium hoc modo intentum maiore vi
<
lb
/>
pollet, vt dictum eſt ſuprà. </
s
>
<
s
id
="
N281A8
">Quintò, hinc ſæpè ita inflecti ſeu tornari po
<
lb
/>
teſt brachium, vt deſcribat arcum minoris circuli, ſed maiorem, ſeu po
<
lb
/>
tius lineam ſpiralem, in qua deſcribenda diutiùs moratur; </
s
>
<
s
id
="
N281B0
">hinc motus fit
<
lb
/>
maior, quia eſt acceleratus; igitur maior ictus. </
s
>
<
s
id
="
N281B6
">Sextò, ſi fuſtis deorſum
<
lb
/>
feratur motu circulari, impetus naturalis accedit impreſſo. </
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>
<
s
id
="
N281BB
">Septimò, ſi
<
lb
/>
vtraque manu intendatur fuſtis, maior erit ictus, vt conſtat ex dictis. </
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>
<
s
id
="
N281C0
">
<
lb
/>
Octauò denique, quod dictum eſt de fuſte impacto cæſim, dici debet
<
lb
/>
enſe. </
s
>
</
p
>
<
p
id
="
N281C6
"
type
="
main
">
<
s
id
="
N281C8
">Octauò, aliquando fuſtis inflectitur; </
s
>
<
s
id
="
N281CB
">quia flexibilis eſt; </
s
>
<
s
id
="
N281CF
">cum ſcilicet
<
lb
/>
motu circulari, ſeu cæſim diuerberat, ſeu flagellat; </
s
>
<
s
id
="
N281D5
">ſit enim fuſtis CA,
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lb
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qui rotetur circa centrum C; </
s
>
<
s
id
="
N281DB
">certè vbi B peruenerit in E, A perueniet
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lb
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in H; </
s
>
<
s
id
="
N281E1
">igitur inflexus eſt fuſtis HEC, vel GFC; ratio eſt, quia cùm po
<
lb
/>
tentia applicata in C agat toto niſu. </
s
>
<
s
id
="
N281E7
">v. g. ſi ſegmentum CB ſeiunctum
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lb
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eſſet à ſegmento BA; </
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>
<
s
id
="
N281F1
">haud dubiè punctum B perueniet citiùs in F, quàm
<
lb
/>
ſi vtrumque ſegmentum coniunctum eſſet, vt notum eſt; </
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>
<
s
id
="
N281F7
">quia maior im
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lb
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petus imprimitur B ſeiuncta; </
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>
<
s
id
="
N281FD
">atqui licèt CB ſit coniunctum BA, ab eo
<
lb
/>
tamen facilè, non quidem omninò ſeiungi, ſed deflecti, dimoueri poteſt
<
lb
/>
propter flexibilitatem materiæ; </
s
>
<
s
id
="
N28205
">igitur B relinquet à tergo BA; </
s
>
<
s
id
="
N2820B
">igitur
<
lb
/>
fuſtis inflectetur, & hæc eſt vera ratio huius phœnomeni: hinc virgulæ
<
lb
/>
ſucco & humore plenæ, nerui bubuli latiores, canones, funiculi, lora,
<
lb
/>
enſes, manubria Tudiculæ maioris, & alia huiuſmodi propter rationem
<
lb
/>
prædictam inflectuntur. </
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>
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<
p
id
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N28217
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type
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<
s
id
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N28219
">Nonò, extremitas fuſtis inflexi, cum deinde redit, maiorem ictum in
<
lb
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fligit: </
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>
<
s
id
="
N2821F
">ratio eſt, v.g. A vbi attingit D poſt inflexionem; </
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>
<
s
id
="
N28225
">quia maiorem
<
lb
/>
impetum habet; </
s
>
<
s
id
="
N2822B
">nam præter impreſſum à potentia applicata in C, acce
<
lb
/>
dit alius ab ipſa inflexione, cuius rationem afferemus tractatu ſequenti,
<
lb
/>
cum de compreſſione, & tenſione corporum; </
s
>
<
s
id
="
N28233
">eſt enim quædam potentia
<
lb
/>
media inter potentiam grauitationis, & potentiam animatorum, quam
<
lb
/>
proinde mediam appellabimus; </
s
>
<
s
id
="
N2823B
">quâ ſcilicet corpora ſeſe reſtituunt pri
<
lb
/>
ſtinæ extenſioni, cuius mirificos effectus habemus in arcu chordis pul-</
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>
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