Casati, Paolo, De igne dissertationes physicae, 1686

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              <pb o="47" file="0059" n="59" rhead="De ignis loco"/>
            duas vires elaſticas ſaltem æquales (niſi probabiliùs dicantur
              <lb/>
            multo plures partes cylindri aërij extrinſeci æquè compreſſæ va-
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            lidiùs coniunctis viribus conari, vt ſe explicent) &</s>
            <s xml:id="echoid-s1596" xml:space="preserve">, ſpectatâ gra-
              <lb/>
            uitate, leuior cylindro aërio extrinſecus premente, deberet con-
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            ſiſtere; </s>
            <s xml:id="echoid-s1597" xml:space="preserve">cylindrulus quippe aërius fiſtulæ incluſus longiſſimè le-
              <lb/>
            uior eſt grauitate Mercurij, quo ſpatium illud impleretur, cui
              <lb/>
            tamen extrinſecus aëris cylindrus reluctaretur, ne deſcenderet:
              <lb/>
            </s>
            <s xml:id="echoid-s1598" xml:space="preserve">Quapropter Mercurius in fiſtulâ breuiore digitis 30 concluſus pa-
              <lb/>
            riter cum aëre, ſuſtinendus eſſet: </s>
            <s xml:id="echoid-s1599" xml:space="preserve">& </s>
            <s xml:id="echoid-s1600" xml:space="preserve">tamen deſcendit.</s>
            <s xml:id="echoid-s1601" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1602" xml:space="preserve">Grad. </s>
            <s xml:id="echoid-s1603" xml:space="preserve">Quanquam aëri compreſſo vis elaſtica deneganda non
              <lb/>
            ſit, cum ex follibus pugillatorijs inflatis, ſi fortè in clauum im-
              <lb/>
            pingantur, quo aluta perforetur, audiamus aërem cum ſibilo
              <lb/>
            erumpentem; </s>
            <s xml:id="echoid-s1604" xml:space="preserve">hæc tamen aëris noſtri infimi compreſſio facta à ſu-
              <lb/>
            perioribus aëris partibus illi imminentibus mihi arridere non po-
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            teſt. </s>
            <s xml:id="echoid-s1605" xml:space="preserve">Memini me haud ita pridem legiſſe apud Boyle in *Defenſione*
              <lb/>
            *contra Linum part.</s>
            <s xml:id="echoid-s1606" xml:space="preserve">2. </s>
            <s xml:id="echoid-s1607" xml:space="preserve">cap.</s>
            <s xml:id="echoid-s1608" xml:space="preserve">4.</s>
            <s xml:id="echoid-s1609" xml:space="preserve">* obſeruationem in Galliâ ab accuratiſ-
              <lb/>
            ſimis æquè ac doctiſſimis viris Paſchalio & </s>
            <s xml:id="echoid-s1610" xml:space="preserve">Pecqueto factam in ex-
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            perimento Torricelliano ad radicem montis alti hexapodas 500,
              <lb/>
            hoc eſt ped. </s>
            <s xml:id="echoid-s1611" xml:space="preserve">3000; </s>
            <s xml:id="echoid-s1612" xml:space="preserve">& </s>
            <s xml:id="echoid-s1613" xml:space="preserve">deprehenſa eſt ibi certâ altitudo Mercurijin fi-
              <lb/>
            ſtulâ. </s>
            <s xml:id="echoid-s1614" xml:space="preserve">Translata eſt fiſtula cum vaſe ad altitudinem hexapodarü 150,
              <lb/>
            & </s>
            <s xml:id="echoid-s1615" xml:space="preserve">Mercurius factus eſt in fiſtulâ humilior digitos 2 {1/4}, quàm in
              <lb/>
            primâ ſtatione. </s>
            <s xml:id="echoid-s1616" xml:space="preserve">Deinde in montis vertice, poſt aſcenſum adhuc
              <lb/>
            hexapodarum 350, ad tres ferè digitos infra altitudinem primæ
              <lb/>
            ſtationis deſcenderat Mercurius. </s>
            <s xml:id="echoid-s1617" xml:space="preserve">Ex quo cylindri aërij grauita-
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            tem inferri volunt diminutam, prout breuior factus eſt cylindrus.
              <lb/>
            </s>
            <s xml:id="echoid-s1618" xml:space="preserve">Sunt igitur tres altitudines cylindrorum Mercurialium æquipon-
              <lb/>
              <figure xlink:label="fig-0059-01" xlink:href="fig-0059-01a" number="3">
                <image file="0059-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/0059-01"/>
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            derantium cum cylindris aërijs: </s>
            <s xml:id="echoid-s1619" xml:space="preserve">nimirum cylindrus AB in primâ
              <lb/>
            ſtatione æquè grauis eſt, ac integer cylindrus aërius: </s>
            <s xml:id="echoid-s1620" xml:space="preserve">cylindrus
              <lb/>
            IB æquiponderat cum cylindro aërio diminuto hexapodis 150;
              <lb/>
            </s>
            <s xml:id="echoid-s1621" xml:space="preserve">igitur grauitas digit. </s>
            <s xml:id="echoid-s1622" xml:space="preserve">2 {1/4} Mercurij AI eſt æqualis grauitati priorum
              <lb/>
            150 hexapodarum cylindri aërij: </s>
            <s xml:id="echoid-s1623" xml:space="preserve">Cylindrus verò OB Mercurij
              <lb/>
            æqualem habet grauitatem cum aërio cylindro adhuc diminuto
              <lb/>
            hexapodis 350; </s>
            <s xml:id="echoid-s1624" xml:space="preserve">quapropter grauitas digit. </s>
            <s xml:id="echoid-s1625" xml:space="preserve">{3/4} Mercurij IO æquat
              <lb/>
            grauitatem conſequentium poſt ſecundam ſtationem hexapoda-
              <lb/>
            rum 350. </s>
            <s xml:id="echoid-s1626" xml:space="preserve">Itaque grauitas AI ad grauitatem IO eſt vt 2 {1/4} ad {3/4},
              <lb/>
            hoc eſt vt 3 ad 1. </s>
            <s xml:id="echoid-s1627" xml:space="preserve">differentiæ autem cylindrorum aëriorum ſunt vt
              <lb/>
            150 ad 350, hoc eſt vt 3 ad 7. </s>
            <s xml:id="echoid-s1628" xml:space="preserve">Cum igitur grauitas priorum 150
              <lb/>
            hexapodarum aërij cylindri ſit vt 3, & </s>
            <s xml:id="echoid-s1629" xml:space="preserve">grauitas conſequentium </s>
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