Fabri, Honoré
,
Tractatus physicus de motu locali
,
1646
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les, quæ omnia facilè intelliguntur ex dictis; </
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<
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id
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N2859D
">itaque habes 4. combina
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tiones duorum malleorum; </
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<
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id
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N285A3
">vel enim eſt idem pondus vtrique, & ea
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dem longitudo, vel idem pondus, ſed diuerſa longitudo, vel eadem lon
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gitudo & diuerſum pondus, vel diuerſum pondus & diuerſa longitudo;
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ſi verò eſt diuerſa longitudo ſimul, & diuerſum pondus, vel eidem ineſt
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maius pondus, & maior longitudo, vel maior longitudo, & minus pon
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dus, & contrà alteri minor longitudo, & minus pondus, vel maius pon
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dus, & minor longitudo, quorum omnium proportiones ſunt determi
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natæ. </
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<
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">Decimò, quod ſpectat ad craſſitudinem manubrij, illa haud dubiè
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auget aliquando vim ictus, aliquando imminuit; </
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<
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">auget quidem, cum
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malleus centrum impetus occupat eo modo, quo explicuimus l. 1.Th.73.
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Corol.4. imminuit verò cum ab eo centro recedit, vt manifeſtum eſt ex
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dictis ibidem, cum infligitur ictus eo mallei puncto, in quo non eſt
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prædictum centrum, formicat manus infligentis, vt patet experientiâ; </
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quippe extremitas illa manubrij, quæ manu tenetur, vel attollitur, vel
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deprimitur; </
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<
s
id
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N285D2
">attollitur quidem, ſi punctum contactus, vel ictus eſt inter
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prædictum centrum & manum; </
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<
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id
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">& è contrario deprimitur, ſi centrum
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ipſum ſit inter punctum contactus & manum; </
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<
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">& quia manus im
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pedit, ne vel attollatur, vel deprimatur, impetus in illam qua
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ſi refunditur; </
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<
s
id
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">hinc illa formicatio non ſine maximo ſæpiùs do
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loris ſenſu; </
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<
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id
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">denique obſerua nouem eſſe combinationes, ſi con
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ſiderentur in malleo longitudo, & latitudo manubrij cum ipſo
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pondere; quippe ſi 3. ducantur in 3. erunt 9. ſed hæc ſunt fa
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cilia. </
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<
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">Vndecimò, ſi malleus impingatur deorſum creſcit ictus propter mo
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tum naturaliter acceleratum, additum ſcilicet extrinſecùs impreſſo; </
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ſi enim mallei cadunt ex eadem altitudine, ſuntque eiuſdem ponderis,
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ictus æquales eſſe neceſſe eſt; </
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<
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id
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N28605
">ſi verò ſunt eiuſdem ponderis, & cadunt
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ex diuerſa altitudine impetus acquiſiti motu naturali, ſunt in ratione
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ſubduplicata altitudinum; </
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<
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id
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">ſi verò ſunt diuerſi ponderis, & cadunt ex
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diuerſa altitudine, ſunt in ratione compoſita aliquomodo ex vtraque; </
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dico aliquo modo, quia non eſt omninò propria compoſitio rationum; </
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poteſt tamen facilè proportio ictuum inueniri, v. g. ſit malleus A, &
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malleus B, ictus A ratione impetus impreſſi extrinſecus ſit vt 8, ratione
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caſus ſit vt 2; </
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<
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id
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">at verò ictus B ratione impetus impreſſi ſit vt 6, ratione
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caſus vt 3: </
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<
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">addantur 8, & 2 erunt 10; </
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<
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">adduntur 6, & 3 erunt 9; </
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<
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ictus ſunt in ratione (10/9), vt conſtat: </
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<
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">porrò quemadmodum nouus im
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petus accedit ratione motus naturalis, cum malleus impingitur deor
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ſum, ita aliquid impetus deſtruitur cum malleus impingitur ſurſum, vt
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patet; </
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<
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id
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">denique, quia ſunt 5 termini, quos reſpicit ictus, ſcilicet pondus
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mallei, longitudo manubrij, craſſitudo arcus extremitatis, & linea ſur
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ſum vel deorſum, ita ſunt 25. combinationes ictuum; ſed hoc fa
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cile eſt. </
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