Gassendi, Pierre, De proportione qua gravia decidentia accelerantur, 1646

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1percurri. Quippe & tametſi partes ſint incompara­
biliter plures in ſemidiametro Mundi, quàm in ſpa­
tiolo DE, ſunt tamen gradus velocitatis incompara­
biliter etiam plures, ac proportione totidem; vt tem­
pora ſubmultipla illis ſuperandis ſufficere valeant.
Vt
breue faciam, erroris origo ex eo profluxiſſe videtur,
quòd merè gratis conſtiteris in parte AD, eiuſque
dimidio inferiore SD; & rem perinde habueris, ac ſi
dimidium ſuperius AS diuidi perinde non poſſet, ne­
que haberet ſpeciatim dimidium eadem ratione, qua
habet AD.
Proptereà enim accepiſti ſolùm omnia
deſignabilia punctaper totam DE, in quibus veloci­
tas eſſet dupla velocitatis in totidem punctis per to­
tam SD; neque reputaſti pergendum, vt haberes
eodem tenore puncta deſignabilia per totam SD, in
quibus velocitas eſſet dupla velocitatis in totidem
punctis deſignabilibus per totam PS, atque ita in in­
finitum; vt prorsùs neceſſarium eſt ex tua ipſius ſup­
poſitione.
Quanquam res vberiùs cognoſcenda eſt
circa cæteras, quas deſcribis parteis.
XXXVII. Vt enim probes (reſumpto iam recen­
tiore ſchemate) tempus per tertiam partem DE æqua­
le eſſe tempori per trientem primæ partis IC, Sumpto,
inquis, CN æquali ipſi CE, erit tota AD diuiſa in
treis parteis æqualeis AI, IN, & ND; eritque veloci­
tas in D ad velocitatem in I, vt tota AD ad ipſam AI, hoc
eſt tripla.
Cumque ob eandem cauſſam velocitas quoque in E
tripla etiam ſit velocitatis in C, erit velocitas per totam DE
tripla velocitatis per totam IC, ſicut tota DE tripla eſt ipſius
IC; ac proinde percurrentur IC, & DE æquali tempore.

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