Fabri, Honoré
,
Tractatus physicus de motu locali
,
1646
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Scholium.
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<
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<
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">Obſeruabis aſſumptam eſſe à me hactenus Parabolam, licèt accurate
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non ſint parabolicæ lineæ, quia proximè ad Parabolas accedunt;
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certè Phyſicè loquendo & ſenſibiliter pro Parabolis aſſumi poſſe ni
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hil vetat. </
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Corollaria.
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<
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">Ex his colligis mirabilium motuum rationem. </
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<
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">Primò mobile proje
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ctum per lineam declinantem ab Ortu ferri poſſe rectà ad Ortum. </
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<
s
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">Secundò projectum per inclinatam deorſum, ferri poſſe per ipſam
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perpendicularem deorſum. </
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<
s
id
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">Tertiò projectum per inclinatam ſurſum, ferri poſſe per verti
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calem. </
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<
s
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">Quartò, rationem à priori habes, cur ſi ex equo vel ſpuas, vel ali
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quid demittas deorſum, rectà perpendiculariter non cadat, ſed ſemper
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è regione, quod maximè videre eſt cum purgatur nauis mobilis, eiecta
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ſcilicet aquâ, quæ ſemper nauim inſequi videtur, imò & cum quis pe
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dem effert in naui hunc motum quoque obſeruat. </
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<
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">Quintò non erit etiam iniucundum inde elicere quomodo in maiore
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naui, diſco ludere vel pila quis poſſit, licèt nauis motus nullo modo lu
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dum impediat; quæ omnia ex iis, quæ diximus neceſſariò conſequuntur,
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& quæ manifeſtum probat experimentum. </
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<
s
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">Sextò, inde etiam eruuntur rationes motuum mixtorum ex pluribus
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motibus v.g.4.5.6.7.&c.in infinitum ſiue in eodem plano, ſiue in diuer
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ſis; </
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>
<
s
id
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N1C8CA
">In diuerſis vt hactenus explicuimus; </
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>
<
s
id
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N1C8CE
">in eodem vero ſiv.g.per BC,
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BE, BA ſimul imprimantur impetus eidem mobili qui ſint vt ipſæ li
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neæ; </
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>
<
s
id
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N1C8D6
">primò fiat ex BA BC mixta BD, & ex BD BE, mixta BF, vel ex
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BE BC mixta BG, & ex BG BA mixta BF, vel ex BE BA mixta
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BH, & ex BH BC mixta BF; </
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>
<
s
id
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">vides ſemper eſſe
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">eandem</
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vltimam
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mixtam in diuerſis planis; iam oſtendimus eſſe plures ſuprà in naui
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mobili v.g. per planum verticale, horizontale, & inclinatum. </
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>
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<
s
id
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">Septimò, ſi in naui mobili curreret equus, vel currus, eſſet motus mix
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tus ex quatuor aliis, & ſi terra moueretur in naui mobili eſſent quatuor
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motus, ſi ex ea aliquod mobile proiiceretur; inuenitur autem linea mix
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ta in diuerſis planis per quamdam planorum circuitionem, de qua
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ſuprà. </
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>
</
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<
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id
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<
s
id
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">Octauò, poſſet facilè in eodem plano motus mixtus conflari ex qua
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tuor aliis vel etiam pluribus, ſint enim quatuor in eodem plano AD
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AE. AF. AH. ex AD AE fit AB, ex AB, A fi fit AC, ex AC AH
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fit AG, quæ eſt longior AC, & AC longior AB: poſſes etiam compo
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nere ex AH AF, atque ita deinceps eodem ordine, & ſemper vltima
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linea erit AG, quod certè mirabile eſt, & à Geometris demonſtrari
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poteſt. </
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>
</
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<
s
id
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">Nonò, ex his motibus mixtis educi poſſunt rationes multorum effe-</
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