Benedetti, Giovanni Battista de
,
Io. Baptistae Benedicti ... Diversarvm specvlationvm mathematicarum, et physicarum liber : quarum seriem sequens pagina indicabit ; [annotated and critiqued by Guidobaldo Del Monte]
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eius corporis, quod ſit denſius aere acquirit, nec totus radius vnquam dictum corpus
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ingr editur, cum ab eius ſuperficie magna pars reflectatur. </
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<
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xml:space
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di corpus lumini, & quantò magis ſpiſſum aut profundum exiſtit, tantò, validius reſi
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ſtit. </
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<
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xml:space
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">Habemus huius rei teſtes, piſcatores vnionum, in ijs mundi partibus, quæ pau-
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cis ab hinc annis Hiſpanorum opera nobis innotuerunt, qui aſfirmanu ad maris
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fundum lumen Solis non peruenire.</
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<
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">Immediata ratio, cur nebulę in ijs locis in quibus
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permaneant, &
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altiores, nunc vero depręſſiores cernantur, non ea eſt, quam Ariſtoteles cap .3. lib. 1.
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metheororum proponit, ſed inde oritur, quòd ſint eædem denſiores ea parte aeris,
<
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quæ ipſis ſupereminet, & rariores e a, quæ ijſdem ſubiacet. </
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<
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poris denſitas maior ea, quæ eſt medij, in quo reperitur, cauſa ſit, vt ipſum corpus de
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ſcendat, & maior raritas eiuſdem corporis, ea, quæ eſt quoque me dij, efficiat, vt di-
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ctum corpus aſcendat, iam Archimedes in lib. de inſidentibus aquæ docuit.</
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inſtituit natura, vt corpora denſiora verſus loca anguſtiora, & minora
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(intelligendo ea loca orbicularis figuræ) quæ ad centrum propius accedunt, & rario
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ra ad ampliora loca, & maius ſpatium occupantia, ſeſe reciperent. </
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<
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quantitas materiæ condenſatæ, eget minori loco quam rarefacta,
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etiani, quia
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corpus denſum non ita ad velocitatem motus localis, vt rarum, idoneum ſit, ad eas
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partes accedat, quæ motibus tardioribus magis ſunt aptæ, corpora
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rara ad eas,
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quæ velocioribus motibus ſunt aptiores ſeſe transferant. </
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reuera ap-
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pareat pro maiori parte, corpus magis denſum, minus diaphanum; </
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futurum, quàm rarum, licet ſæpiſſimè videamus contrarium, vt ſuperius innuimus.
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magis opacum denſo, & diaphanum raro,
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quàm è contra. </
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gis opaca, aut minus diaphana, magis vicina centro colligantur, vt ſpatium, quòd re
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manet, abſque vllo impedimento à radijs ſolaribus penetrari poſſit. </
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cauſæ, quas hoc loco poſui, propriæ ſunt, immediatæ, & per ſe, ex quibus fit, vt corpo
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ra denſiora deſcendant, & rariora aſcendant in mediis minus denſis, aut minus raris
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dictorum corporum, quæ à nemine,
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ſciam, hucuſque propoſitæ fuerunt.</
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<
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">Qui autem aſſerunt cucurbitæ, quam apponunt chirurgi, effectum ex eo naſci,
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calidi ſit attrahere, valdè aberrant à vero quia hoc, non niſi à raro, & à denſo imme-
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diatè, à calido & frigido cauſatis efficitur, quia aer in cucurbita rarefactus à calore
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& per conſequens dilatatus, ſtatim vt à dicto calore deſeritur, iterum condenſatur &
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tantò citius, quantò aer ambiens frigidior exiſtet, & quia eadem materia cum con-
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denſata fuerit minorem ſemper occupat locum, reſtringens igitur ſeſe in cucurbi-
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ta aer dum condenſatur, neceſſariò fit, ne ulla, ſcilicet pars vacua remaneat,
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cum
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alius aer ingredi cucurbitam nequeat aliud corpus ingrediatur. </
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in qua nullum aliud, quam aèreum ſit corpus experiri poſſumus, ſi
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ad ignem pri-
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mò calefactam, deinde
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ore in amplo aliquo cyatho, aut alio vaſe. </
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pleno vbi videbimus huiuſmodi liquorem ſtatim ſurſum ferri, quia dum calefit am-
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phora, rarefit quoque aer qui in ea continetur, & quia rateſcit dilaratur, & quia
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dilatatur, eget maiore loco; </
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<
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">& ideo magna pars eius foras exit; </
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portio, quæ intus remanſerit, iterum condenſatur ob defectum caloris, reſtringitur,
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<
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indiget loco; </
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cuus remaneat, vt aliud quoddam corpus ingrediatur, cum ad
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aeri non
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patuerit aditus. </
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<
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di amphoram poſſit ita amphorę hærebit, vt non cito diuelli poſſit, & eo modo ſępe </
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