Gassendi, Pierre
,
De motu impresso a motore translato epistulae duae
,
1642
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quem aliunde eſſe exquiſitè complanatum concipias
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Si ſupponas enim te illi vel leuiculum imprimere
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motum; intelliges ſanè hunc motum nun quam ceſſa
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turum, ſed globum reuolutum iri ſecundum totum
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ambitum, ac reuolutione peracta reuolutum iterùm
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iri, & conſequenter iterùm, & ita continuò perſeue
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raturum. </
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<
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tantillum hoc modo non poteſt, quin centro exſi
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ſtente ſemper perpendiculari ad id punctum, quo glo
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bus contingit horizontale planum, tantum ſit molis
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antè, quantum retrò, & pars anterior non poſſit
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tendere deorſum, quin pars poſterior tendat ſurſum;
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& illa ſemper hanc pertrahat, iſta ſemper illam pro
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pellat; adeò proinde, vt cùm nulla cauſa poſſit deor
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sùm adigere globum, quin quantum ex vna parte de
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primit, tantúndem eleuet ex alia, oporteat motum
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ſemel impreſſum conſtare ſemper inter depreſſionem,
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& eleuationem medium: atque idcircô vniformem,
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inceſſantemque perſeuerare. </
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">Accedit, quòd nulla ſit
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cauſa, quamobrem ſuum curſum vel retardet vnquam,
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vel acceleret, quatenus nunquam magis, vel minus à
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centro terræ abſcedit, aut ad id accedit: neque cur
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proinde vnquam debeat à motu ceſſare, quemadmo
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dum fieret, ſi ſupponeres ali quam in ſuperficie in æqua
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bilitatem. </
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<
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">Nam ſicubi decliuitas, & accliuitas foret,
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acceleraret motum per locum decliuem, & retardaret
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per accliuem: &, ſi tanta accliuitas eſſet, vt emergere
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ſupra eam non poſſet, cogeretur recurrere, excurreque,
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& poſt excurſus, recurſuſque aliquot conquieſcere
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tandem in medio inter accliuitatem, & decliuitatem </
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