Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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in aere reperitur, nec talis hypotheſis vt impoſſibilis
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reprobari poſſet, cum reuera & terra, & corpora om
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nia terrena magneticam vim habere manifeſtum ſit,
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in quibus prædicta operatio neceſſariò ſequeretur,
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poſita
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prædicta figuratione in particulis ma
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gneticis. </
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quæ in aere obſeruantur ſaluari ex prædicta hypo
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theſi, igitur concedi ea deberet ſaltem vt poſſibilis. </
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Cap. 5. de ae
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ris grauitate
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æquilibrio,
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ſtructura, &
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vi elaterią
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eius.</
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Cap. 5. de ae
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ris grauitate
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æquilibrio,
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ſtructura, &
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vi elaterią
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eius.</
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PROP. CXXV.
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Meliùs aeris proprietates ſaluantur ſi eius minimæ particu
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læ ſint duræ flexibiles, & reſilientes ad modum ma
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chinæ, habeantque figuram tubi, vel cylindri
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excauati compoſiti ex laminis, vel filis
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læuibus, aut ramoſis obliquè in ſe
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ipſos circumductis.
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<
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">HAnc tamen hypotheſim poſtea reiicere accura
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tiùs conſiderata; ſuppoſui enim tubulos ali
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quos graciliſſimos multis modis componi poſſe ex
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materia reſiliente ad modum machinæ. </
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ni poſſunt tubuli conflati ex tenuiſſima laminula iņ
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ſe ipſam circumducta, & continuata, quæ paritèr
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machina ſit flexibilis, & poſt compreſſionem reſilire
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valeat, vt contingit in arcu compreſſo. </
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poteſt maxima illa aeris condenſatio quam patitur à
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vi externa comprimente, quia nimirùm perimetrum
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internum fiſtulæ licèt ſemper eiuſdem menſuræ ſit,
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tamen minorem capacitatem continentèr acquirit, </
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