Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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ſe parat particulas aliquas aeris ibidem relictas, ita
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que intercapedines, quæ ſeparant aeris particulas,
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partim occupantur ab igne, partim ab inani ſpatio,
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dum igneæ particulæ motu velociſſimo conuertun
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tur, & vertigines complent, intercipiendo grandia
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ſpatia inania; vndè malè hinc infertur raritas maxima
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ad quam aer ampliari poteſt. </
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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. CXVII.
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Secunda Merſenni experientia in ſclopeto pneumatico
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fact a dubia quoque eſt.
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<
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in bombarda, ſeu ſclopeto pneumatico ma
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gno conatu immiſit vaſtam aeris molem, quæ in exi
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guo ſpatio condenſata fuit, aitque pondus ſexagin
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ta
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aeris incluſiſſe in cauitate catapultæ, quæ
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ab 8. vncijs aquæ impleri poterat, hinc deducit ae
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rem in ſclopeto immiſſum adeò condenſari vt quin
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decies ſpatium internum catapultæ expleat; proin
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de que tres digitos cubicos aeris ferè
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põderare
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gra
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num vnum. </
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<
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nus nil certi colligit, cùm afferat innumeras difficul
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tates, & ingenuè fateatur, ſemper dubitari poſſe an
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intra catapultæ cauitatem vnà cum aere inſuffletur
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particula aliqua oleaginoſa, vel aquea, quandoqui
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dem epiſtomium emboli humectari debetin eius ſu
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perficie coriacea, vt omninò rimæ claudantur, vt re
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greſſus aeris prohibeatur. </
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