Gassendi, Pierre
,
De motu impresso a motore translato epistulae duae
,
1642
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terit, quæ motus initium in lapide faciat. </
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<
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id
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">Concipe
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denique reſtitui aërem ſimùl cum effluuio; & per
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uidebis lapidem poſſe adhûc à quieſcendo deſiſte
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re, ac verſus Terram allici, quòd tametſi aër inferior
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(ſeu qui ſub ipſo) nonnihil reſiſtat, propter qualem
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cúmque corpulentiam; nihilo minùs vis attractrix tan
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ta eſſe valeat, quæ & ciendo lapidi, & ſuperandæ
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aëris reſiſtentiæ ſufficiat. </
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<
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">Igitur cauſa hæc attrahens
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habere poteſt vnde id ſuppleat, quod viſum eſt im
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pellenti deeſſe. </
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<
s
id
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">Secundò, ſi id repetas, quod di
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ctum eſt de lapide in ſpatiis illis imaginariis, ſeu in
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inani conſtituto; concipis iam, ſi cauſa quæpiam le
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uiculo ictu eum pellat, fore vt moueatur æquabili
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planè, ac perpetuo motu, niſi obex occurrerit.
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</
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<
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id
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">Concipe deinde, cùm ita mouetur, pelli ictu con
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ſimili; tunc quia motus præcedens non deſtruetur,
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coïbunt duo motus in vnum, qui ſit priore velocior
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duplò, quique pari modo ſit futurus ex ſe æquabi
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lis, atque perpetuus. </
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<
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id
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">Concipe rurſùs pelli tertio, &
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conſimili ictu; tunc quia prior motus ex duobus
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quaſi gradibus compoſitus perſeuerabit, fiet coa
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litio noui motus ſeu gradus; ſiue erit deinceps mo
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tus, qui ſit triplò velocior primo. </
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<
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">Concipe poſteà
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pelli quarto, pelli quinto, & aliis; agnoſceſque fore,
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vt velocitas tantùm, ac tandiu incrementum accipiat,
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quantùm, & quandiù ictus repetentur. </
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<
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id
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">Niſi facilè d
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concipias, conſtitue exquiſitum globum ſupra ex
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quiſitam, libellatámque planitiem, & leui primum
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ictu eum impelle; deprehendes moueri ipſum peni
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tùs æquabiliter. </
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<
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