Alberti, Leon Battista, L' architettura

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            <s xml:id="echoid-s12423" xml:space="preserve">
              <pb o="342" file="348" n="348" rhead="DELLA ARCHITETTVRA"/>
            lato è lungo a vn modo, & </s>
            <s xml:id="echoid-s12424" xml:space="preserve">corriſpondonſi l’un a l’altro, con angoli tutti a ſqua-
              <lb/>
            dra. </s>
            <s xml:id="echoid-s12425" xml:space="preserve">La piu vicina a queſta è la ſeſquialtera; </s>
            <s xml:id="echoid-s12426" xml:space="preserve">& </s>
            <s xml:id="echoid-s12427" xml:space="preserve">la ſeſquitertia ancora ſi annoue
              <lb/>
            reràinſra le piante minori. </s>
            <s xml:id="echoid-s12428" xml:space="preserve">Queſte tre ſi ſatte corriſpondentie adunque lequa
              <lb/>
            li noi chiamiamo ancora ſemplici, ſi conuengono alle piante piccole. </s>
            <s xml:id="echoid-s12429" xml:space="preserve">A le
              <lb/>
            piante ancor mediocri, ſe ne conuengono parimente tre altre, la ottima di tut
              <lb/>
              <note position="left" xlink:label="note-348-01" xlink:href="note-348-01a" xml:space="preserve">5</note>
            te è la Dupla, & </s>
            <s xml:id="echoid-s12430" xml:space="preserve">la vicina a queſta è quella, che ſi fà della ſeſquialtera duplicata,
              <lb/>
            laquale ſi fà certamente in queſto modo: </s>
            <s xml:id="echoid-s12431" xml:space="preserve">Diſegnato il minor numero della
              <lb/>
            pianta, come s’è a dire quattro, ſi allunga la prima ſeſqui altera, & </s>
            <s xml:id="echoid-s12432" xml:space="preserve">ſarà ſei, ag-
              <lb/>
            giugni ancora vn’altra uolta a queſta l’altra ſeſquialtera di queſta ſeſta, & </s>
            <s xml:id="echoid-s12433" xml:space="preserve">diuen
              <lb/>
            terà noue. </s>
            <s xml:id="echoid-s12434" xml:space="preserve">Eccederà adunque la maggiore lunghezza in queſto luogo la mi-
              <lb/>
              <note position="left" xlink:label="note-348-02" xlink:href="note-348-02a" xml:space="preserve">10</note>
            nore, per il doppio, & </s>
            <s xml:id="echoid-s12435" xml:space="preserve">un Tuono piu di eſſo doppio.</s>
            <s xml:id="echoid-s12436" xml:space="preserve"/>
          </p>
          <note position="left" xml:space="preserve">15</note>
          <note position="right" xml:space="preserve">
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          4 # 0 # 0 # 0 # 0 ſeſqui altera
            <lb/>
          6 # 0 # 0 # 0 # 0 # 0 # 0
            <lb/>
          9 # 0 # 0 # 0 # 0 # 0 # 0 # 0 # 0 # 0 ſeſqui altera
            <lb/>
          </note>
          <p>
            <s xml:id="echoid-s12437" xml:space="preserve">Alle mediocri ancora ſi appartiene quella, nella quale piglierai due volte la
              <lb/>
            ſeſquiterza col medeſimo ordine come nella paſſata. </s>
            <s xml:id="echoid-s12438" xml:space="preserve"># Sarà adunque la linea
              <lb/>
            minore di queſta ripreſa produttione, come s’è a dir noue, & </s>
            <s xml:id="echoid-s12439" xml:space="preserve">la lunga ſedici.</s>
            <s xml:id="echoid-s12440" xml:space="preserve"/>
          </p>
          <note position="left" xml:space="preserve">20</note>
          <note position="right" xml:space="preserve">
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          9 # 0 # 0 # 0 # 0 # 0 # 0 # 0 # 0 # 0 # ſeſqui terzia
            <lb/>
          12 # 0 # 0 # 0 # 0 # 0 # 0 # 0 # 0 # 0 # 0 # 0 # 0 # 0 # ſeſqui terzia
            <lb/>
          </note>
          <p>
            <s xml:id="echoid-s12441" xml:space="preserve">Adunque queſta linea maggiore è ſuperata dal doppio della minore man-
              <lb/>
            co un tuono. </s>
            <s xml:id="echoid-s12442" xml:space="preserve">Nelle piante maggiori ſi tiene queſta regola, concioſia che, o
              <lb/>
              <note position="left" xlink:label="note-348-07" xlink:href="note-348-07a" xml:space="preserve">25</note>
            e’ ſi accozza la dupla con la ſeſquialtera, & </s>
            <s xml:id="echoid-s12443" xml:space="preserve">faſsi tripla, o e’ ſi accozza alla dupla
              <lb/>
            la ſeſquitertia, & </s>
            <s xml:id="echoid-s12444" xml:space="preserve">diuentano gli ultimi numeri come tre & </s>
            <s xml:id="echoid-s12445" xml:space="preserve">otto, o veramente
              <lb/>
            e’ ſi pigliano, che i diametri corriſpondino l’uno a l’altro per il quadruplo.
              <lb/>
            </s>
            <s xml:id="echoid-s12446" xml:space="preserve">Habbiamo detto delle piante minori, nelle quale i numeri corriſpondono
              <lb/>
            vgualmente l’uno a l’altro, o come dua a tre, o come tre a quattro; </s>
            <s xml:id="echoid-s12447" xml:space="preserve">& </s>
            <s xml:id="echoid-s12448" xml:space="preserve">delle
              <lb/>
              <note position="left" xlink:label="note-348-08" xlink:href="note-348-08a" xml:space="preserve">30</note>
            piante mediocri, nellequali i numeri ſi corriſpondono per dupla, o come il
              <lb/>
            quattro al noue, o come il noue al ſedici. </s>
            <s xml:id="echoid-s12449" xml:space="preserve">Nel vltimo luogo habbiamo trat-
              <lb/>
            tato delle piu lunghe & </s>
            <s xml:id="echoid-s12450" xml:space="preserve">maggiori, nellequali i numeri ſi corriſpondono per tri
              <lb/>
            ple, o per quadruple, o come il tre allo otto. </s>
            <s xml:id="echoid-s12451" xml:space="preserve">Congiugneremo inſieme i dia-
              <lb/>
            metri di qual ſi uoglia corpo interzo per dir coſi con queſti numeri, i quali ſo
              <lb/>
              <note position="left" xlink:label="note-348-09" xlink:href="note-348-09a" xml:space="preserve">35</note>
            no o innati o congiunti con eſſe armonie, o ueramente preſi d’altronde, con
              <lb/>
            certo ordine & </s>
            <s xml:id="echoid-s12452" xml:space="preserve">regola determinata. </s>
            <s xml:id="echoid-s12453" xml:space="preserve">Nelle armonie ſono i numeri delle cor-
              <lb/>
            riſpondentie, de quali ſi fanno le proportioni di quelle, come nella dupla, nel-
              <lb/>
            la tripla & </s>
            <s xml:id="echoid-s12454" xml:space="preserve">nella quadrupla. </s>
            <s xml:id="echoid-s12455" xml:space="preserve">La dupla certamente ſi fà della ſeſqui altera ſem-
              <lb/>
            plice, allaquale ancora ſi aggiunga la ſeſquitertia, & </s>
            <s xml:id="echoid-s12456" xml:space="preserve">l’eſſempio è queſto. </s>
            <s xml:id="echoid-s12457" xml:space="preserve"># Sia il
              <lb/>
              <note position="left" xlink:label="note-348-10" xlink:href="note-348-10a" xml:space="preserve">40</note>
            numero minore della dupla due, aggiugnia queſto ſecondo l’ordine della la
              <lb/>
            ſeſquialtera il numero ternario, & </s>
            <s xml:id="echoid-s12458" xml:space="preserve">da queſto ternario ancora, ſecondo laſeſqui
              <lb/>
            tertia producerai, & </s>
            <s xml:id="echoid-s12459" xml:space="preserve">harai il quaternario, ilquale medeſimo numero è doppio
              <lb/>
            al numero del due.</s>
            <s xml:id="echoid-s12460" xml:space="preserve"/>
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