Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

Table of figures

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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. </s>
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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.</s>
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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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              <s id="s.001272">MElior eſt ſecunda Merſenni experientia dùm̨
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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
                <expan abbr="granorũ">granorum</expan>
              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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              gra­
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              num vnum. </s>
              <s id="s.001273">Sed ex tanto apparatu tandem Merſen­
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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. </s>
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