Zanotti, Francesco Maria, Della forza de' corpi che chiamano viva libri tre, 1752

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            <s xml:id="echoid-s1218" xml:space="preserve">
              <pb o="85" file="0109" n="109" rhead="LIBRO I."/>
            ti. </s>
            <s xml:id="echoid-s1219" xml:space="preserve">Afcoltiamo ora degli elaſtri. </s>
            <s xml:id="echoid-s1220" xml:space="preserve">Et io inconta-
              <lb/>
            nente cominciai. </s>
            <s xml:id="echoid-s1221" xml:space="preserve">Giacchè mi avete obbligato di
              <lb/>
            entrare contra mia voglia in una materia cotan-
              <lb/>
            to oſcura, e fino ad ora da così pochi trattata,
              <lb/>
            quale ſi è quella degli elaſtri, io vi proporrò una
              <lb/>
            opinione, che non dico eſſer vera, ma aſpetterò
              <lb/>
            di ſentir da voi altri, perchè ſi debba dir falſa. </s>
            <s xml:id="echoid-s1222" xml:space="preserve">Io
              <lb/>
            dunque, comparando inſieme le due ſerie, che
              <lb/>
            vedete deſcritte nella figura ſeconda, AC, EN,
              <lb/>
            ragiono di queſto modo. </s>
            <s xml:id="echoid-s1223" xml:space="preserve">L’ elaſtro ABC nell’
              <lb/>
            aprirſi eccita con un certo impulſo il globo C,
              <lb/>
            producendo in eſſo una certa velocità; </s>
            <s xml:id="echoid-s1224" xml:space="preserve">onde que-
              <lb/>
            ſto in un tempetto di qualſiſia picciolezza ſcorre
              <lb/>
            uno ſpazietto C
              <emph style="it">m</emph>
            , picciolo eſſo pure di qual pic-
              <lb/>
            ciolezza vi aggrada; </s>
            <s xml:id="echoid-s1225" xml:space="preserve">e intanto che il globo C vie-
              <lb/>
            ne in
              <emph style="it">m</emph>
            , l’ elaſtro, che lo ſegue, s’ allarga egli
              <lb/>
            pure da C fino in
              <emph style="it">m</emph>
            . </s>
            <s xml:id="echoid-s1226" xml:space="preserve">Così avviene alla ſerie AC
              <lb/>
            nel primo aprirſi, che ella fà. </s>
            <s xml:id="echoid-s1227" xml:space="preserve">Vegniamo ora al-
              <lb/>
            la EN. </s>
            <s xml:id="echoid-s1228" xml:space="preserve">Non è alcun dubio, che queſta ancor nell’
              <lb/>
            aprirſi ecciti con un certo impulſo il globo N.
              <lb/>
            </s>
            <s xml:id="echoid-s1229" xml:space="preserve">E queſto impulſo par bene, che debba eſſer qua-
              <lb/>
            druplo di quello, onde è eccitato il globo C; </s>
            <s xml:id="echoid-s1230" xml:space="preserve">
              <lb/>
            concioſiacoſachè il globo C ſia ſpinto da un ſolo
              <lb/>
            elaſtro, il globo N da quattro, i quali quattro
              <lb/>
            elaſtri ſi aprono tutti ad un tempo, et aprendoſi
              <lb/>
            ſpingono tutti il globo. </s>
            <s xml:id="echoid-s1231" xml:space="preserve">Produceſi dunque nel
              <lb/>
            globo N velocità quadrupla di quella, che ſi pro-
              <lb/>
            duce nel globo C, per cui dee ſcorrere lo ſpa-
              <lb/>
            zietto N
              <emph style="it">r</emph>
            quadruplo dello ſpazietto C
              <emph style="it">m</emph>
            nello ſteſ-
              <lb/>
            ſo tempo; </s>
            <s xml:id="echoid-s1232" xml:space="preserve">e intanto che il globo N viene in
              <emph style="it">r</emph>
            </s>
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