Angeli, Stefano degli, Della gravita' dell' aria e fluidi : esercitata principalmente nelli loro homogenei

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          <pb o="76" file="00170" n="170" rhead="_DIALOGO_"/>
          <p>
            <s xml:id="echoid-s5126" xml:space="preserve">_Cont_. </s>
            <s xml:id="echoid-s5127" xml:space="preserve">Queſta ſtrauaganza è ſtata bene anco auuertita dall’oc-
              <lb/>
            culatiſſimo Riccioli, il quale à queſte eſperienze ſubito
              <lb/>
            ſoggiunge. </s>
            <s xml:id="echoid-s5128" xml:space="preserve">_Cauſa autem ob quam aer qui celerior eſſe debuit_,
              <lb/>
            _tardior tamen fuit oleo, fuit quia aer ſolus raritatem ſuam reti-_
              <lb/>
            _nens per anguſtum fiſtulæ canalem ſic aſcendebat, vt circa ſe_
              <lb/>
            _aquæ in ipſius locum ſuccedenti, tenuiſſimam viam relinqueret:_
              <lb/>
            </s>
            <s xml:id="echoid-s5129" xml:space="preserve">_quare cum aqua extenuari deberet morulas temporis requi-_
              <lb/>
            _rebat_.</s>
            <s xml:id="echoid-s5130" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5131" xml:space="preserve">_Mat_. </s>
            <s xml:id="echoid-s5132" xml:space="preserve">Laſcino queſte morule che ancor noi dimoriamo vn
              <lb/>
            poco circa queſta materia. </s>
            <s xml:id="echoid-s5133" xml:space="preserve">Deuono adunque ſapere, che
              <lb/>
            le predette eſperienze ſono ſtate tentate dal Riccioli in
              <lb/>
            occaſione di voler perſuadere al modo litterario, che ſe dia
              <lb/>
            leggierezza poſitiua, e che condottida queſta ſaliſcano
              <lb/>
            per l’acqua l’aria, & </s>
            <s xml:id="echoid-s5134" xml:space="preserve">oglio, e non perche ſiano eſtruſi dall’-
              <lb/>
            acqua più graue. </s>
            <s xml:id="echoid-s5135" xml:space="preserve">Della qual coſa tratta _ex profeſſo nel cit_.
              <lb/>
            </s>
            <s xml:id="echoid-s5136" xml:space="preserve">_luogo pag_. </s>
            <s xml:id="echoid-s5137" xml:space="preserve">383. </s>
            <s xml:id="echoid-s5138" xml:space="preserve">& </s>
            <s xml:id="echoid-s5139" xml:space="preserve">384 Ho nutrito lungo penſiero di eſami-
              <lb/>
            nare queſte ſue ragioni; </s>
            <s xml:id="echoid-s5140" xml:space="preserve">ma hauendo comprato in queſti
              <lb/>
            giorni il nuouo, & </s>
            <s xml:id="echoid-s5141" xml:space="preserve">eccellente libro del Dottiſſimo Signor
              <lb/>
            Gio. </s>
            <s xml:id="echoid-s5142" xml:space="preserve">Alfonſo Borelli _De motionibus natur alibus à grauitate_
              <lb/>
            _pendentibus_, & </s>
            <s xml:id="echoid-s5143" xml:space="preserve">hauendo veduto che _cap. </s>
            <s xml:id="echoid-s5144" xml:space="preserve">4 prop. </s>
            <s xml:id="echoid-s5145" xml:space="preserve">71. </s>
            <s xml:id="echoid-s5146" xml:space="preserve">e per altre_
              <lb/>
            _ſeguenti_, vengono da eſſo confutate, ho conoſciuto eſſer
              <lb/>
            ſuperflua la mia fatica. </s>
            <s xml:id="echoid-s5147" xml:space="preserve">Non giudico però vgualmente ſu-
              <lb/>
            perfluo narrare à loro Signori fedelmente l’eſperienze
              <lb/>
            tentate anco da me in ſimil propoſito.</s>
            <s xml:id="echoid-s5148" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5149" xml:space="preserve">Hò preſo vn tubo di vetro come SX, lungo vn braccio, e
              <lb/>
            mezzo in circa delli noſtri, e largo in diametro più della
              <lb/>
            larghezza de due vngie del pollice, & </s>
            <s xml:id="echoid-s5150" xml:space="preserve">otturatolo prima
              <lb/>
            con veſcica legata in S V, ſtrettiſſimamente, e riempito-
              <lb/>
            lo d’acqua, laſciandoli luogo per vn poco d’aria, l hò ſer-
              <lb/>
            rato parimente nel medemo modo dalla parte R X; </s>
            <s xml:id="echoid-s5151" xml:space="preserve">& </s>
            <s xml:id="echoid-s5152" xml:space="preserve">
              <lb/>
            hauendolo riuoltato in ſito perpendicolare all’orizonte,
              <lb/>
            hò oſſeruato che l’aria hauendo formato, in compara-
              <lb/>
            tione del primo, vn cilindro molto lungo, il quale termi-
              <lb/>
            naua di ſopra in figura curua come A B C, e di ſotto in
              <lb/>
            circolo poco meno largo del tubo, aſcendeua aſſai lenta.
              <lb/>
            </s>
            <s xml:id="echoid-s5153" xml:space="preserve">mente, occupando quaſi tutta la larghezza del tubo; </s>
            <s xml:id="echoid-s5154" xml:space="preserve">e
              <lb/>
            nel fine aſcendeua vn poco più velocemente che nel prin-
              <lb/>
            cipio; </s>
            <s xml:id="echoid-s5155" xml:space="preserve">e nel tempo, che egli a ſcendeua ſi vedeua manife.</s>
            <s xml:id="echoid-s5156" xml:space="preserve"/>
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