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. </s>
              <s id="id.000425">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? </s>
              <s id="id.000426">Non-ne ip­
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              ſa quoque flammula eſt admodùm fluxa? </s>
              <s id="id.000427">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? </s>
              <s id="id.000428">Quid verò, ſi id ſine
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              aere vnà accurrente non fiat? </s>
              <s id="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. </s>
              <s id="id.000430">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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              </s>
              <s id="id.000431">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? </s>
              <s id="id.000432">An non impetum ergo imprimet, & mo­
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              tum impreſſum à manu juuabit? </s>
              <s id="id.000433">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 </s>
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