Gassendi, Pierre
,
De motu impresso a motore translato epistulae duae
,
1642
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tur; & impetum, quo aër compreſſus catapultis il
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lis pneumaticis recens adinuentis, globulum plum
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beum, ſagittamve laxatis habenis non ſecùs explodit,
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ac in bombardis facit puluis pyrius. </
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<
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">Quin etiam in
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his, quæſo te, quid poteſt eſſe admirabilius, quàm
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flammulam impetu tanto, ac tam procùl abigere glo
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bum adeò denſum, atque ponderoſum? </
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ſa quoque flammula eſt admodùm fluxa? </
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">Et quis cre
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deret eius vi, non globum modò antrorſùm agi; ſed
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machinam etiam tormentariam adeò magnam, adeó
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que grauem retrorſùm pelli? </
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<
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">Quid verò, ſi id ſine
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aere vnà accurrente non fiat? </
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<
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id
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id.000429
">videlicet fieri videtur,
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dum flamma in ſui creatione ampliorem locum quæ
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ritans, tum in poſticam machinæ partem impetum
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conuertit, tum in globum anteriùs ſitum, qui ob li
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bertatem canalis exſiliens, flammam inſtantem ita
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habet, vt ea diſpereunte, & inanem locum relinquen
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te, conuolet aër, ex aduerſa parte, ac tanto quidem
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impetu, vt & machinam retrorſùm compellat, &
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impactus tonitru excitet, & commoto aere circum
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vicino, etiam ingenteis ædeis concutiat. </
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<
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id
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">Tanta igitur
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eſſe poteſt vehementia aëris; vt intelligas ipſum poſſe
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non lapidi modò ſurſùm niti reſiſtere, ſed ipſum
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etiam impetu facto, impreſſóque, pellere deorsùm.
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</
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<
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">At, inquies, cùm lapis ſursùm nititur, nonne aër quo
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que diſtrahitur, & in locum à lapide relictum infernè
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ſuccedit? </
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<
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id
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">An non impetum ergo imprimet, & mo
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tum impreſſum à manu juuabit? </
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<
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">An-non proinde
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tantum aberit, vt impetus decreſcere debeat, quin
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debeat potius increſcere, ac lapis ferri ſurſum duplò </
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