Schott, Gaspar
,
Mechanica hydraulico-pneumatica. Pars I. Mechanicae Hydraulico-pnevmaticae Theoriam continet.
,
1657
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locus exinanitus repleatur:
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iniectus enim ignis,
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ſubjungit Hero,
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corrumpit & extenuat aërem, qui in ipſis continetur,
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ideoque relin
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quitur in ipſis vacuum;
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cùm verò cucurbitula reſpiraverit; aër in e
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vacuatum locum ſuccedit, materiânon ampliùs attractâ,
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deciditq́ue
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cucurbitula.
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Cucurbitu
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la cur car
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nem attra
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hant.
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Sphæra con
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cava, & aë
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re plena, cur
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plùs aeris
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per inflatio
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nem recipi
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at
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ſecundũ
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Heronem.
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>Quartò,
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conſtruatur Sphæra craſſitudinem habens laminæ, vt nè
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facilè rumpatur, continensque circiter cotylas octo, & vndique præclu
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ſa;
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& per foramen in ipſa factum immittamus
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Siphonem æreum,
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hoc eſt, tubum gracilem, non contingentem locum, qui puncto perfora
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to ſecundùm diametrum opponitur, ita vt aqua fluere poſſit; alia autem
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ipſius pars extra ſphæram emineat circiter digitos tres, ipſi〈qué〉 diligenter
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adferruminetur, ambitu foraminis circa tubum ſtanno præcluſo, vt cùm
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volumus ore per ſiphonem inflare, ſpiritus ex ſphærâ nullo modo excidat.
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<
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>His factis,,
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inſpiciamus quæ contingunt. </
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>Aëre enim in ipſa exiſtente
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(quemadmodum & in aliis vaſis quæ vacua appellantur)
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totum
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que qui in ipsa locum replente, & per continuationem quandam ad eius
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ambitum applicato, nullo denique loco, ut arbitrantur, penitus exiſten
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te vacuo; neque aquam immittere poſſemus, neque alium aërem, non
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excedente priori aëre qui in ipsa erat; & ſi multa vi immiſſionem facia
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mus, priùs diſrumpetur vas, quàm aliquid ſuſcipiat, cùm plenum ſit: ne
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que enim aëris corpora in minorem magnitudinem contrahi poſſunt:
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quare neceſſe erit, vt in ſeipſis habeant quædam intervalla, in quæ com
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preſſa minorem obtineant molem; hoc autem veriſimile non eſt, nullo
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penitus exiſtente vacuo: & cùm corpora ad ſeſe applicentur ſecundùm
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omnes ſuperficies, & ſimiliter ad vaſis ambitum, non poſſunt expulſa lo
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cum alicui facere, non exiſtente vacuo aliquo, quamobrem nullo modo
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in ſphæram immittetur aliquid eorum, quæ ſunt extra, niſi excedat ali
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qua pars aëris priùs in ea contenti, ſiquidem totus locus conſtipatus est,
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& continuatus, vt arbitrantur. </
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<
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>At
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experientiâ conſtat contrari
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um: nam
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ſi quis ſiphonem ori admovens ſphæraminflet, multum im
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mittit ſpiritum, non excedente aëre, qui in ea eſt. </
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>
<
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>Quod cùm ita ſem
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per contingat; manifeſtò oſtenditur,
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contractionẽ
">contractionem</
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fieri
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corporũ
">corporum</
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in ſphæra
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exiſtentium in vacua implicata: contractio autem præter naturam fit,
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ob immiſſionis violentiam. </
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>
<
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>Si igitur aliquis inflans, & ad ipſum os ma
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num apponens, ſtatim digito ſiphonem obturet; manebit omni tempore
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