Fabri, Honoré
,
Tractatus physicus de motu locali
,
1646
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<
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411
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in L vt SA ad AL: denique ſi globus cadat in globum, id poteſt fieri
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duobus modis. </
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<
s
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N28E26
">Primò, ſi L cadat in X, id eſt linea directionis ducatur
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per centrum vtriuſque, & tunc maximus ictus. </
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<
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id
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">Secundò, ſi ſecus v.g. ſi
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globus A cadat in globum O, ſitque punctum contactus in M; ſic autem
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ictus eſt ad priorem in compoſita ex OYZA ad compoſitam ex MO
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MA vel vt chorda MY, ſeu MP ad diametrum LB, quæ omnia patent
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ex dictis. </
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Scholium.
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<
s
id
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">Obſerua ſupereſſe tertium modum percuſſionis, qui fit emiſſione; cum
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autem emiſſio tribus modis fieri poſſit.1°. </
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<
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">ſimplici impulſione ſine ictu,
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& proiectione. </
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<
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">2°. Percuſſione. </
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<
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">3°. Proiectione, cui adde eiaculationem,
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vel euibrationem; de his tribus ſequentibus Theorematis agendum eſt. </
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Theorema
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16.
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Explicari poſſunt omnia phœnomena emiſſionis, quæ fit primo modo, ſcilicet
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per meram impulſionem.
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</
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</
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<
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<
s
id
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N28E78
">Primò, emittitur vt plurimùm globus, ſeu pila Tudiculâ dumtaxat
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minori; vix enim eſſe poteſt alius emiſſionis modus, qui ad hunc facilè
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non reuocetur. </
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<
s
id
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">Secundò, imprimitur impetus Tudiculæ ſimul, & globo, quia
<
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abbr
="
vtrumq;
">vtrumque</
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>
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motum brachij impedit; hoc etiam demonſtrauimus lib.1. </
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<
s
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">Tertiò, quò maior eſt Tudicula, tardiùs mouetur, vt patet: </
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>
<
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">hinc po
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tentia manet diutiùs applicata; </
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<
s
id
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">non tamen propterea globus velociùs
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mouetur, vt patet, quia ſingulis inſtantibus minùs in eo producitur; </
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>
<
s
id
="
N28E9F
">eſt
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enim quaſi pars Tudiculæ; ſecus tamen accidit, ſi Tudicula verberet
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pilam, de quo infrà. </
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<
s
id
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">Quartò, ſi Tudicula ſit longior, longiùs emittitur pila; </
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<
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">ratio eſt, quia
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diutiùs manet potentia applicata pilæ; </
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<
s
id
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">quippe magis contrahitur bra
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chium: hinc longiùs porrigitur, vt clarum eſt. </
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>
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<
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id
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<
s
id
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">Quintò, ſi maior ſit Tudicula, & pila emittatur verberatione, longiùs
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emittitur; </
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>
<
s
id
="
N28EC1
">ratio eſt, quia maior impetus imprimitur Tudiculæ à potentia
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diutiùs applicata; diutiùs autem applicatur maiori, quia tardiùs moue
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tur, vt ſuprà diximus. </
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>
</
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<
p
id
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type
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">
<
s
id
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">Sextò, pila emiſſa velociſſimè mouetur eo inſtanti, quo vltimo tan
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gitur à Tudicula; quia deinceps nihil prorſus impetus accedit, ac proin
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de continuò ſenſim deſtruitur ab eo inſtanti. </
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<
p
id
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type
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<
s
id
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N28ED5
">Septimò, nunquam mouetur pila emiſſa velociùs ipſa Tudiculâ, cum
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ſcilicet emiſſio fit per meram impulſionem; </
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>
<
s
id
="
N28EDB
">quia ſcilicet vltimo inſtanti,
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contactus velociſſimè mouetur pila; </
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>
<
s
id
="
N28EE1
">ſed eo inſtanti æquè velociter mo
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uetur Tudicula, vt conſtat: porrò ideo emittitur pila, quia retinetur Tu
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dicula, ne longiùs recedat. </
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>
</
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<
p
id
="
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type
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">
<
s
id
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">Octauò, cum verò emittitur pila per verberationem; </
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>
<
s
id
="
N28EEF
">haud dubiè, ſi
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pila leuior eſt Tudicula, mouetur deinde velociùs; </
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>
<
s
id
="
N28EF5
">ſecus verò, ſi grauior
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eſt & æquè velocior, ſi æqualis eſt grauitatis; </
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>
<
s
id
="
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">patet ex dictis de impetu; </
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>
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