Casati, Paolo
,
De igne dissertationes physicae
,
1686
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Diſſertatio Tertia.
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grauitati addita conſtituit aliquid magis graue; </
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<
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xml:space
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">igitur & </
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<
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xml:space
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">leue
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additum leui facit aliquid leuius: </
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<
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xml:space
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">quapropter, cum aër in folle
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pugillatorio additus aëri efficiat molem grauiorem, indicium eſt
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graue additum fuiſſe graui. </
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<
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xml:space
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">Nam hęc argumentandi forma perin-
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de eſt, ac ſi dicerem, longitudo addita longitudini facit Maius;
<
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</
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<
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xml:space
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">Multum additum multo facit plus; </
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<
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xml:space
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">Craſſum additum craſſo facit
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craſſius; </
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<
s
xml:id
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xml:space
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">igitur Paruum additum paruo facit breuius, Modicum
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additum modico facit minus, Tenue additum tenui facit ſubti-
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lius: </
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<
s
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xml:space
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">Cum autem huiuſcemodi conſecutiones manifeſtâ falſitate
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laborent, quia quæ per exuperantiam & </
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<
s
xml:id
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xml:space
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">defectum opponuntur,
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contrario modo ſe habent, & </
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<
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xml:space
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">ad augendam denominationem
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exuperantibus additio, deficientibus detractio conuenit; </
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<
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xml:space
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">ideò ad
<
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conſtituendam leuitatem maiorem non eſt addendum leue leui in
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eodem ſpatio, ſed demendum leue ex leui. </
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<
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xml:space
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quod in eodem ſpatio corporis cœteroqui leuis (aut ſaltem non
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grauis, quia in loco ſuo) conſtipatur alia pars corporis ſimplici-
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ter & </
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<
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">ſolitariè leuis extra illud ſpatium, iam non ſunt duo leuia,
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ſed factum eſt vnum graue: </
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<
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xml:space
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">neque enim hìc res ſe habet, quemad-
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modum ſi ex naui exportentur ſarcinę, quarum in locum ſuccedit
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aër, & </
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<
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">Similiter prætereo Hydroſtaticum fundamentum ex Archimede
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petitum, vbiliquoris partes premere, & </
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nuntur: </
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">Hæc enim mera Hypotheſis eſt, quam aſſumere non exa-
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minatis Phyſicis rationibus Geometræ licuit: </
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<
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xml:space
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">Cœterùm, preſſione
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omni valere iuſſâ, quæ merguntur, pro diſſimilitudine conſtipa-
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tionis materiæ grauitant; </
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<
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xml:space
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">quæ innatant, parem habent depreſ-
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ſæ partis leuitatem cum grauitate emerſæ. </
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mit, & </
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">aqua aquam, ſit in vaſe ſuperficies aquæ FG, cui innatat
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cylindrus ligneus *da*, & </
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FG intelligatur parallela ſuperficies HI, in qua eſt
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baſis lignei cylindri *ab*. </
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ficiei HI non premerentur æqualiter ab impoſitis
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partibus, pars minùs preſſa vrgeretur ſurſum: </
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tur tam premit cylindrus ligneus *da* vnã cum in-
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cumbente illi cylindro aërio, quàm premant aquei
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cylindriæqualis baſis ſimul cum impoſitis cylindris
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aërijs: </
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<
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">at reliqui cylindri aërij longiores ſunt illo, qui incumbit-
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cylindro ligneo, aquei verò cylindri æqualis baſis non ſunt </
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