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

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            <s xml:id="echoid-s5663" xml:space="preserve">
              <pb o="93" file="00187" n="187" rhead="QVINTO"/>
            tauola. </s>
            <s xml:id="echoid-s5664" xml:space="preserve">Poiche il manico corriſponde alla B A; </s>
            <s xml:id="echoid-s5665" xml:space="preserve">il ferro è l’-
              <lb/>
            A D; </s>
            <s xml:id="echoid-s5666" xml:space="preserve">il ſoſtentacolo è in A, oue s’appoggia ſopra il muro,
              <lb/>
            ò tauola; </s>
            <s xml:id="echoid-s5667" xml:space="preserve">la forza s’applica in B; </s>
            <s xml:id="echoid-s5668" xml:space="preserve">il peſo, cioè il chiodo da
              <lb/>
            cauare s’applica in D, ouc dobbiamo conſiderare la fiſſura,
              <lb/>
            ò corna del martello, trà li quali ſi piglia il capo del chio-
              <lb/>
            do. </s>
            <s xml:id="echoid-s5669" xml:space="preserve">Quanto maggiore ſarà il manico B A, tanto maggior
              <lb/>
            aggiuto ſomminiſtrerà ad eſtraere il chiodo.</s>
            <s xml:id="echoid-s5670" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5671" xml:space="preserve">_Mat._ </s>
            <s xml:id="echoid-s5672" xml:space="preserve">Beniſſimo. </s>
            <s xml:id="echoid-s5673" xml:space="preserve">Hora conſideriamo nel ſchema ſeguente il
              <lb/>
            piano D E, e la colonna C A B, che lo bacci eſquiſitamente
              <lb/>
            in A B; </s>
            <s xml:id="echoid-s5674" xml:space="preserve">in C, ſia applicata la forza, che tirandola per l’M C,
              <lb/>
            procuri ſtaccarla. </s>
            <s xml:id="echoid-s5675" xml:space="preserve">Reſſiſte la colonna allo ſtaccamẽto con
              <lb/>
            la ſua grauità, e con quella d’vn cilindro d’aria, che ſe l’ap-
              <lb/>
            poggia ſopra alto quant’ è l’at-
              <lb/>
              <figure xlink:label="fig-00187-01" xlink:href="fig-00187-01a" number="37">
                <image file="00187-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/9EXVCG1R/figures/00187-01"/>
              </figure>
            mosfera, che pure biſogna ſpin-
              <lb/>
            gere, & </s>
            <s xml:id="echoid-s5676" xml:space="preserve">alzare nell’alzar la colõ-
              <lb/>
            na;</s>
            <s xml:id="echoid-s5677" xml:space="preserve">la quale grauità come tãte fi-
              <lb/>
            bre perpendicolari premendo, e
              <lb/>
            grauitando ſopra li infiniti punti
              <lb/>
            del piano A B, ſi concepiſcono
              <lb/>
            grauitare tutte raccolte, & </s>
            <s xml:id="echoid-s5678" xml:space="preserve">vnite
              <lb/>
            nel centro I, quaſi ſiano vn gra-
              <lb/>
            ue ſolo iui collocato, come be-
              <lb/>
            niſſimo conſidera il Sig. </s>
            <s xml:id="echoid-s5679" xml:space="preserve">Borelli.
              <lb/>
            </s>
            <s xml:id="echoid-s5680" xml:space="preserve">Lo ſtaccamẽto della baſe della colonna dal piano ſi fà tut-
              <lb/>
            to in vna volta, sì che nell’atto di queſto la colonna non
              <lb/>
            appoggia ſopra il piano D E, che con il ſolo B Dobbiamo
              <lb/>
            adunque concepire vna leua IBC, angolata, nella quale
              <lb/>
            il peſo ſia collocato nel centro I, e la forza in C. </s>
            <s xml:id="echoid-s5681" xml:space="preserve">Ogni vol-
              <lb/>
            ta adunque che la forza in C, al peſo in I, hauera la mede-
              <lb/>
            ma proportione che la diſtanza IB, alla diſtanza BC, la for-
              <lb/>
            za ſarà equiualente al peſo; </s>
            <s xml:id="echoid-s5682" xml:space="preserve">sì che accreſciuta vn poco po-
              <lb/>
            co la forza ne ſeguirà lo ſtaccamento.</s>
            <s xml:id="echoid-s5683" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5684" xml:space="preserve">_Ofr._ </s>
            <s xml:id="echoid-s5685" xml:space="preserve">Hò inteſo il reſto. </s>
            <s xml:id="echoid-s5686" xml:space="preserve">Quando CB, ſarà maggiore di BI, ſarà
              <lb/>
            più facile ſtaccar la colonna inclinandola che alzandola
              <lb/>
            perpendicolarmente; </s>
            <s xml:id="echoid-s5687" xml:space="preserve">ma quando BC, foſſe, ò vguale a IB,
              <lb/>
            ò d’eſſa minore, allora vi vorrebbe, ò vgual forza, ò mag-
              <lb/>
            giore, che ad alzarla perpendicolarmente.</s>
            <s xml:id="echoid-s5688" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5689" xml:space="preserve">_Mat._ </s>
            <s xml:id="echoid-s5690" xml:space="preserve">Vano adunque è il ſuo ſutterfugio. </s>
            <s xml:id="echoid-s5691" xml:space="preserve">Se adunque </s>
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