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

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              <s id="s.000636">
                <pb pagenum="127" xlink:href="010/01/135.jpg"/>
              aeream lanuginem, ſeu cruſtam continguam, & con­
                <lb/>
                <arrow.to.target n="marg157"/>
                <lb/>
              nexam LG, verùm lanci oppoſitæ B, adhæret ſphæ­
                <lb/>
              ra aerea HK denſior, vt potè non excalefacta à ferro
                <lb/>
              feruente; hinc fit vt ſumma lancis B vnà cum adnexa
                <lb/>
              cruſta ambientis aeris HK grauior ſit ærea lamina A
                <lb/>
              vnà cum rariori lanugine aeris adhærentis LG.
                <expan abbr="Mirũ">Mirum</expan>
                <lb/>
              igitur non eſt, quòd a maiori pondere libræ extremi­
                <lb/>
              tas E deprimatur, & ei oppoſita D eleuetur. </s>
              <s id="s.000637">Eodem
                <lb/>
                <arrow.to.target n="marg158"/>
                <lb/>
              ferè modo, vt dicebam priùs, aer cubiculi circą,
                <lb/>
              caminum cùm ſit valdè denſus, comparatus cum
                <expan abbr="flã-ma">flam
                  <lb/>
                ma</expan>
              , & aere calefacto intra caminum exiſtente, &
                <lb/>
              ideò valdè rarefacto, mirum non eſt ſi proptèr illius
                <lb/>
              grauitatem excedentem ſursùm exprimat leuiorem
                <lb/>
              flammam, acremque adhærentem paritèr rarum. </s>
              <s id="s.000638">Eſt
                <lb/>
              igitur euidentiſſimum in hiſce experimentis, quòd
                <lb/>
              aer
                <expan abbr="flammã">flammam</expan>
              ambiens, nedùm eam exprimit, ſed
                <expan abbr="bonã">bonam</expan>
                <lb/>
              partem aeris
                <expan abbr="rarefactã">rarefactam</expan>
              vnà cum
                <expan abbr="flãma">flamma</expan>
              impellit quo­
                <lb/>
              que ſursùm. </s>
              <s id="s.000639">Sed dicet aliquis, cur circa flammam̨
                <lb/>
                <arrow.to.target n="marg159"/>
                <lb/>
              lucernæ non obſeruatur prædictus ventus? </s>
              <s id="s.000640">reſpon­
                <lb/>
              detur non eſſe æquè ſenſibilem, quia nimirum lucer­
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              næ flamma non inſinuatur intra fiſtulam aliquam, vt
                <lb/>
              eſt canalis camini, qui exitum habet extra
                <expan abbr="cubiculũ">cubiculum</expan>
              ;
                <lb/>
              cùm ergo lucernæ flamma vndique ambiatur ab aere
                <lb/>
              aperto abſque euidenti cun motione eam impellere
                <lb/>
              ſursùm poteſt exprimendo, nimirùm facto breui cir­
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              cuitu à vertice flammæ vſque ad eius baſim, & ob
                <lb/>
              flammę exiguitatem parua quoque eſt moles aeris ei
                <lb/>
              contigua, quę agitatur, & conuoluitur, & hæc eſt
                <lb/>
              ratio, quare circa lucernæ flammam ventus non ob-</s>
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