Alberti, Leon Battista, L' architettura

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        <div xml:id="echoid-div173" type="section" level="1" n="84">
          <p>
            <s xml:id="echoid-s8001" xml:space="preserve">
              <pb o="173" file="177" n="177" rhead="LIBRO SESTO."/>
            gnerle ſe tu continoui di tirarle: </s>
            <s xml:id="echoid-s8002" xml:space="preserve">Ma ſe tu le percoterai di qual ſi uoglia grandiſ-
              <lb/>
            ſinio colpo non ſi moueranno coſi ſubito, come uorreſti. </s>
            <s xml:id="echoid-s8003" xml:space="preserve">Et per il contrario cõ
              <lb/>
            un ſubito colpo, & </s>
            <s xml:id="echoid-s8004" xml:space="preserve">con una ſurioſa ſpinta ſi muouono alcune coſe, che giamai
              <lb/>
            ſenza una ſtraordinaria forza di peſi grandiſsimi ſi ſariano poſſute muouere.
              <lb/>
            </s>
            <s xml:id="echoid-s8005" xml:space="preserve">Sopra il diaccio ancora i grandiſsimi peſi non repugnano a chi gli tira. </s>
            <s xml:id="echoid-s8006" xml:space="preserve">Veg-
              <lb/>
              <note position="left" xlink:label="note-177-01" xlink:href="note-177-01a" xml:space="preserve">5</note>
            giamo ancora che quelle coſe, che pendono da un lungo canapo per alquanto
              <lb/>
            di ſpatio ſon pronte ad eſſer moſſe. </s>
            <s xml:id="echoid-s8007" xml:space="preserve">Il conſiderare le ragioni di queſte coſe,
              <lb/>
            & </s>
            <s xml:id="echoid-s8008" xml:space="preserve">lo imitarle ſaràa propoſito, noi ne tratteremo ſuccintamente. </s>
            <s xml:id="echoid-s8009" xml:space="preserve">Biſogna che
              <lb/>
            il diſotto del peſo ſia ſaldiſsimo & </s>
            <s xml:id="echoid-s8010" xml:space="preserve">uguale, & </s>
            <s xml:id="echoid-s8011" xml:space="preserve">quanto e’ ſarà piu largo, tanto man
              <lb/>
            co conſumerà il piano ordinatoli ſotto: </s>
            <s xml:id="echoid-s8012" xml:space="preserve">ma quanto e’ ſarà piu ſottile, tanto ſarà
              <lb/>
              <note position="left" xlink:label="note-177-02" xlink:href="note-177-02a" xml:space="preserve">10</note>
            piu eſpedito, uero è che e’ ſarà ſolchi nel piano, & </s>
            <s xml:id="echoid-s8013" xml:space="preserve">aſſonderauui. </s>
            <s xml:id="echoid-s8014" xml:space="preserve">Se nel diſot-
              <lb/>
            to del peſo ui ſaranno angoli, ſe ne ſeruirà come di ugnoni ad afferrarſi nel pia
              <lb/>
            no, & </s>
            <s xml:id="echoid-s8015" xml:space="preserve">a reſiſtere al uiaggio. </s>
            <s xml:id="echoid-s8016" xml:space="preserve">Se i piani ſaranno liſci, gagliardi, uguali, forti non
              <lb/>
            pendendo da alcun lato, non ſi alzando da alcun’altro, non affondando da al-
              <lb/>
            cun lato, che impediſca, quel peſo certamente non harà coſa alcuna che li con-
              <lb/>
              <note position="left" xlink:label="note-177-03" xlink:href="note-177-03a" xml:space="preserve">15</note>
            traſti, o per il che recuſi di obbedire, eccetto queſta ſola coſa, cioè che eſſo pe-
              <lb/>
            ſo di ſua natura è grandiſsimo amico del la quiete, & </s>
            <s xml:id="echoid-s8017" xml:space="preserve">però tardo & </s>
            <s xml:id="echoid-s8018" xml:space="preserve">lento. </s>
            <s xml:id="echoid-s8019" xml:space="preserve">Con-
              <lb/>
            ſiderando forſe Archimede a ſimili coſe, & </s>
            <s xml:id="echoid-s8020" xml:space="preserve">eſaminando piu proſondamente la
              <lb/>
            forza de le coſe, che noi habbiamo dette, ſu indotto a dire, che ſe e’ ſi trouaſſe
              <lb/>
            baſa di tanta gran macchina, che gli darebbe il cuore di tramutare il Mondo.
              <lb/>
            </s>
            <s xml:id="echoid-s8021" xml:space="preserve">
              <note position="left" xlink:label="note-177-04" xlink:href="note-177-04a" xml:space="preserve">20</note>
            Lo ordinare il fondo del peſo, & </s>
            <s xml:id="echoid-s8022" xml:space="preserve">il piano ſopra a che ſi hà a tirare, il che noi quì
              <lb/>
            cerchiamo, ci uerrà fatto commodamente. </s>
            <s xml:id="echoid-s8023" xml:space="preserve">Diſtendinſi Traui tante, & </s>
            <s xml:id="echoid-s8024" xml:space="preserve">tanto
              <lb/>
            groſſe, & </s>
            <s xml:id="echoid-s8025" xml:space="preserve">tanto gagliarde, che ſieno baſtanti al peſo, ſalde, uguali, liſce, congiun
              <lb/>
            te pari inſieme, inſra il fondo & </s>
            <s xml:id="echoid-s8026" xml:space="preserve">il piano, ui è di biſogno d’un certo che di me-
              <lb/>
            zo, che faccia il cammino piu lubrico, il che ſi fa con ſapone, o con ſeuo, o cõ
              <lb/>
              <note position="left" xlink:label="note-177-05" xlink:href="note-177-05a" xml:space="preserve">25</note>
            morchia, o forſe con belletta. </s>
            <s xml:id="echoid-s8027" xml:space="preserve">Ecci ancora un’altro modo di fare il cammi-
              <lb/>
            no lubrico, cioè con curri meſsiui ſotto a trauerſo, i quali ſe in queſto luogo ſa-
              <lb/>
            ranno aſſai, diſſicilmente ſi acconcieranno diritti, a linee uguali & </s>
            <s xml:id="echoid-s8028" xml:space="preserve">determina-
              <lb/>
            te al diſegnato uiaggio, il che è di neceſsità che ſi faccia, accio non dieno noia,
              <lb/>
            & </s>
            <s xml:id="echoid-s8029" xml:space="preserve">non conduchino il peſo a l’una de le bande. </s>
            <s xml:id="echoid-s8030" xml:space="preserve">Ma che ad una ſola ſpinta facci-
              <lb/>
              <note position="left" xlink:label="note-177-06" xlink:href="note-177-06a" xml:space="preserve">30</note>
            no tutti bene l’oſſitio loro. </s>
            <s xml:id="echoid-s8031" xml:space="preserve">Et ſe e’ ſaranno pochi, certo che durando ſotto il
              <lb/>
            peſo ſatica, o ſi conſumeranno, o ſtiacciatiſi ſi ſermeranno, ouero con quella
              <lb/>
            una ſola linea con laquale toccono il ſondo del peſo, ſi ſicheranno & </s>
            <s xml:id="echoid-s8032" xml:space="preserve">ſi ferme-
              <lb/>
            ranno quaſi come un taglio nel peſo, o nel piano. </s>
            <s xml:id="echoid-s8033" xml:space="preserve">Il curro è compoſto di piu
              <lb/>
            cerchi congiunti inſieme, & </s>
            <s xml:id="echoid-s8034" xml:space="preserve">i Mathematici dicono che il cerchio non può toc-
              <lb/>
              <note position="left" xlink:label="note-177-07" xlink:href="note-177-07a" xml:space="preserve">35</note>
            care una linea retta piu che in un punto, per queſto chiamo io taglio del Curro
              <lb/>
            quella linea ſola del curro che dal peſo è aggrauata, a queſti curri ſi prouederà
              <lb/>
            bene ſe ſi torrà legnami ſodi, ſerrati, & </s>
            <s xml:id="echoid-s8035" xml:space="preserve">con il diſegnare & </s>
            <s xml:id="echoid-s8036" xml:space="preserve">dirizzare le linee ſe-
              <lb/>
            condo la ſquadra.</s>
            <s xml:id="echoid-s8037" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div175" type="section" level="1" n="85">
          <note position="left" xml:space="preserve">40</note>
          <head xml:id="echoid-head97" style="it" xml:space="preserve">Delle Ruote, Perni, Stanghe, o Manouelle, Taglie & della grandezza, forma, & figu-
            <lb/>
          raloro. Cap. VII.</head>
          <p>
            <s xml:id="echoid-s8038" xml:space="preserve">MA eſſendoci oltre a queſte molte altre coſe, buone a biſogni noſtri, co-
              <lb/>
            me ſono Ruote, Taglie, Viti, & </s>
            <s xml:id="echoid-s8039" xml:space="preserve">Stanghe, douiamo di eſſe trattare piu </s>
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