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

Table of figures

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              <s id="s.001449">
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              rius aerei cylindri prementis ſtagnantem ſuperfici­
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              em E, & ab hoc
                <expan abbr="ſuſpẽditur">ſuſpenditur</expan>
              mercurius AB. igitur à
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              virtute manus ſuſtinetur reſiduum ponderis vltra æ­
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              quilibrium, ſcilicèt pondus vitri AB vnà cum ponde­
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              re cylindri aerei orificio, & digito A incumbentis,
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              licèt falsò perſuadeatur ſe ſuſtinere mercurium ſub­
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              iectum, eique adnexum. </s>
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              Cap. 6. non
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              dari attracti­
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              onem.</s>
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              <s id="s.001451">Et profectò ab hac experientia euincitur, quòd tra­
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              ctio illa, quæ in digito percipitur, non ſit vera attra­
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              ctio facta ob vacui timorem, quia dum fiſtula minùs
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              cubito cum quadrante eleuatur, mercurius à digito
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              non diuellitur, & proindè ſpatium inane ibidem non
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              intercipitur, vnde nulla attractio fieri deberet, cùm
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              è contrà maxima fieret quando ob mercurij deſcen­
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              ſum efficitur ſolita inanitas, & tamen hoc falſum eſt,
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              cùm in vtroque caſu ferè æquali vi digiti pulpa de­
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              orſum attrahi ſentiatur. </s>
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            <p type="main">
              <s id="s.001452">
                <expan abbr="Tãdem">Tandem</expan>
              examinati debet pulcherrima, & ingenio­
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              ſiſſima difficultas, quam cariſſimus amicus Diony­
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              ſius Guerrinus M.D. Ætrur. </s>
              <s id="s.001453">
                <expan abbr="Caſtrẽſis">Caſtrenſis</expan>
              Generalis pre­
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              fectus mihi diſcutiendam propoſuit. </s>
              <s id="s.001454">Dicebat enim ſi
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              in tubis pneumaticis, ſeu cteſibijs, quibus aquam̨
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              haurire ſolemus è puteis, aqua eleuatur, non
                <expan abbr="quidẽ">quidem</expan>
                <lb/>
              vera attractione, quatenùs embolo eleuato hauritur,
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              vel exugitur aqua ſubiecta, vt pueri calamo intrą
                <lb/>
              aquam immiſſo reſtricto ore, & anhelitu, & ſpiritu
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              attracto aquam ſursùm eleuant; ſed hoc contingit,
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              quia dum embolus manu ſursùm trahitur, impellitur
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              ſursùm quoque cylindrus aereus embolo
                <expan abbr="incumbẽs">incumbens</expan>
              , </s>
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