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

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              <s id="s.000731">
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                <lb/>
              cultates à pręclaro authore euulgatas, quę ab hac ex­
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              perientia deſumuntur; ſit fiſtula vitrea RSVX cuius
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              latitudo ſit duorum, vel trium digitorum, altitudo
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              verò ſit vnius, vel alterius cubiti, repleaturque aqua,
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              ſed remaneat in eius vertice portio aliqua aeris vni­
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              us, vel alterius digiti, poſtea foramine RX perfectè
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              occluſo, vel palma manus, vel operculo aliquo re­
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              uoluatur fiſtula vt eius infima baſis SV in ſupremolo­
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              co emineat, videbimus aerem è fundo RX ſursùm̨
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              aſcendere, atque incuruari ad modum arcus, ex par­
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              te ſuperiori ABC, & è contrà ex parte infima AGC,
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              aut explanari, vel etiam cauitatem aliquam ad mo­
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              dum ſcutellæ acquirere. </s>
              <s id="s.000732">Hinc prædictus Author in­
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              fert certè deduci aerem ſursùm in præ­
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              dicta fiſtula aſcendere propria virtutę
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              intrinſeca leuitatis non per
                <expan abbr="extruſionẽ">extruſionem</expan>
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              factam ab aqua ambiente; quia, inquit
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              ipſe,
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              aer ſupernè fastigiatur ad modum di­
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              ſculi, vt faciliùs peruadat aquam, & quaſi
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              perforet illam, quia aer est, qui turgeſcendo
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              ſursùm aquam introit, & cedere ſibi cogit
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              quaſi cuneo in illius medio adacto, alio quin
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              ſi idcircò aer ſursùm tendit quia ab aqua de­
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              orsùm tendente extruditur in ſuperiora, aqua
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              potiùs peruaderet cuneatim aerem; vt con­
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              tingit in pluuia, vel ſaltem retunderet ſuper­
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              nè illius tumorem, & infernè illum quaſi forcipe
                <expan abbr="comprimẽs">comprimens</expan>
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              constringeret ad figuram conoidem eius partem infimam.
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              Cap. 4. poſi­
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              tiuam leui­
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              tatem noņ
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              dari.</s>
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              Alia argu­
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              menta pro
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              leuitate po­
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              ſitiua
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              ta à pulcher
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              rimo expe­
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              rimento.</s>
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            <p type="main">
              <s id="s.000735">Pro reſolutione harum difficultatum priùs metho-</s>
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