Casati, Paolo, Fabrica, et uso del compasso di proportione, dove insegna à gli artefici il modo di fare in esso le necessarie divisioni, e con varij problemi ...

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            <s xml:id="echoid-s284" xml:space="preserve">
              <pb o="14" file="0026" n="27" rhead="CAPO II."/>
            così di mano in mano ſin alla decima; </s>
            <s xml:id="echoid-s285" xml:space="preserve">e per maggior com-
              <lb/>
            modità dell operare, parimente, ſi notino le frattioni non
              <lb/>
            equiualenti ad vn’altra parte aliquota, ò ad v@’ altra frattio-
              <lb/>
            ne; </s>
            <s xml:id="echoid-s286" xml:space="preserve">e queſte frattioni ſi notino al ſuo punto con due numeri,
              <lb/>
            cioè col ſuo Numeratore, e ſuo De-
              <lb/>
            nominatore: </s>
            <s xml:id="echoid-s287" xml:space="preserve">Così ſi deue notare; </s>
            <s xml:id="echoid-s288" xml:space="preserve">mà
              <lb/>
              <figure xlink:label="fig-0026-01" xlink:href="fig-0026-01a" number="9">
                <image file="0026-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/0026-01"/>
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            non {6/10}, che à quella ſono vguali; </s>
            <s xml:id="echoid-s289" xml:space="preserve">mà
              <lb/>
            non {4/6}, ò,, e così de gli altri. </s>
            <s xml:id="echoid-s290" xml:space="preserve">Solo
              <lb/>
            deue auuertirſi di mettere li numeri
              <lb/>
            con tal diſtintione, che non generino
              <lb/>
            confuſione, onde vno ſi prenda per
              <lb/>
            vn’altro. </s>
            <s xml:id="echoid-s291" xml:space="preserve">Nella ſteſſa maniera ſia diui-
              <lb/>
            ſa, e notata la SV totalmente vguale
              <lb/>
            alla ST. </s>
            <s xml:id="echoid-s292" xml:space="preserve">Non conſegliarei però di
              <lb/>
            mettere queſta linea (la quale però
              <lb/>
            chiamaſi Diuiſoria) ſopra dello Stro-
              <lb/>
            mento, in cui deuono metterſi le al-
              <lb/>
            tre linee, delle quali ſi dirà più auan-
              <lb/>
            ti; </s>
            <s xml:id="echoid-s293" xml:space="preserve">à fine che li numeri di queſta line@
              <lb/>
            non ſi confondano con quelli d’altre
              <lb/>
            linee vicine; </s>
            <s xml:id="echoid-s294" xml:space="preserve">Mà ſarei di parere, che
              <lb/>
            ſi metteſſe queſta in vno Stromento
              <lb/>
            particolare, maſſime, che gli Artefici
              <lb/>
            più ordinarij non hanno biſogno di
              <lb/>
            quell’altre linee, e di queſta puonno
              <lb/>
            grandemente giouarſi.</s>
            <s xml:id="echoid-s295" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s296" xml:space="preserve">L’vſo di queſta linea è manifeſto;
              <lb/>
            </s>
            <s xml:id="echoid-s297" xml:space="preserve">perche poſta la linea da diuiderſi, ò di
              <lb/>
            cui ſi voglia vna parte determinata,
              <lb/>
            nell’ eſtremità alli punti 1. </s>
            <s xml:id="echoid-s298" xml:space="preserve">1, </s>
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