Alberti, Leon Battista, L' architettura

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          <p>
            <s xml:id="echoid-s850" xml:space="preserve">
              <pb o="21" file="025" n="25" rhead="LIBRO PRIMO."/>
            mente al ſito. </s>
            <s xml:id="echoid-s851" xml:space="preserve">Et alcuni ancora che non pare ſi aſpettino al ſito, coſi propiamẽ
              <lb/>
            te, main gran parte alla regione et ſono queſti. </s>
            <s xml:id="echoid-s852" xml:space="preserve">Egli è di neceſsità cõſiderare,
              <lb/>
            che opera noi ci mettiamo à fare, publica ò priuata, ſacra ò ſecolare, & </s>
            <s xml:id="echoid-s853" xml:space="preserve">le altre ſi-
              <lb/>
            mili, delle quali à luoghi loro diſtintamẽte diremo. </s>
            <s xml:id="echoid-s854" xml:space="preserve">Percioche altro luogo, & </s>
            <s xml:id="echoid-s855" xml:space="preserve">
              <lb/>
            altro ſpatio ſi debbe dare al mercato, altro al teatro, & </s>
            <s xml:id="echoid-s856" xml:space="preserve">altro al luogo doue figio
              <lb/>
              <note position="left" xlink:label="note-025-01" xlink:href="note-025-01a" xml:space="preserve">5</note>
            ca alle braccia, & </s>
            <s xml:id="echoid-s857" xml:space="preserve">altro à vno tempio; </s>
            <s xml:id="echoid-s858" xml:space="preserve">la onde biſognerà hauere riſpetto, ſecõdo
              <lb/>
            che ricerca la qualità, & </s>
            <s xml:id="echoid-s859" xml:space="preserve">lo vſo di ciaſcuno edificio nel Situarlo, & </s>
            <s xml:id="echoid-s860" xml:space="preserve">dargli la for-
              <lb/>
            ma. </s>
            <s xml:id="echoid-s861" xml:space="preserve">Ma perſeguitare, ſi come in queſto luogo cominciamo di parlare general
              <lb/>
            mente, tratteremo ſolamẽte di quelle coſe, che noi giudicheremo neceſſarie: </s>
            <s xml:id="echoid-s862" xml:space="preserve">ſe
              <lb/>
              <note position="left" xlink:label="note-025-02" xlink:href="note-025-02a" xml:space="preserve">10</note>
            prima però raccõteremo alcune coſe delle linee, che faráno molto a propoſito,
              <lb/>
            ad eſprimere il fatto. </s>
            <s xml:id="echoid-s863" xml:space="preserve">Percioche hauẽdo à trattare del diſegno del ſito egli è
              <lb/>
            cõueniẽte, che noi trattiamo prima di quelle coſe cõ lequali ſi fa detto diſegno.</s>
            <s xml:id="echoid-s864" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s865" xml:space="preserve">Ogni diſegno adúque ſi fa di linee et di angoli, le linee ſono quello vltimo di
              <lb/>
            ſegno, che chiude intorno lo intero ſpatio del ſito. </s>
            <s xml:id="echoid-s866" xml:space="preserve">La parte della ſuperficie,
              <lb/>
            ſuggetta à queſto diſegno che è cõtenuta da due linee che ſi toccano l’una l’al-
              <lb/>
              <note position="left" xlink:label="note-025-03" xlink:href="note-025-03a" xml:space="preserve">15</note>
            tra, ſi chiama angolo. </s>
            <s xml:id="echoid-s867" xml:space="preserve">Percioche dall’interſecatione di due linee l’una cõ l’altra
              <lb/>
            ſi fanno quattro angoli. </s>
            <s xml:id="echoid-s868" xml:space="preserve">De quali ſe qual ſiè luno, ſarà vguale à vno ꝑ vno à tut
              <lb/>
            ti tre gli altri, ſi chiamerãno à ſquadra, & </s>
            <s xml:id="echoid-s869" xml:space="preserve">quelli che ſarãno minori, ſi chiamerã-
              <lb/>
            no ſotto ſquadra, & </s>
            <s xml:id="echoid-s870" xml:space="preserve">i maggiori, ſopra ſquadra. </s>
            <s xml:id="echoid-s871" xml:space="preserve">Le linee ancora, alcune ſono di
              <lb/>
            ritte, & </s>
            <s xml:id="echoid-s872" xml:space="preserve">alcune torte, delle linee a chiocciola, & </s>
            <s xml:id="echoid-s873" xml:space="preserve">delle auuolte nõ fa qui meſtiero
              <lb/>
              <note position="left" xlink:label="note-025-04" xlink:href="note-025-04a" xml:space="preserve">20</note>
            cheio raccõti. </s>
            <s xml:id="echoid-s874" xml:space="preserve">La linea diritta è vn filo tirato da vn pũto ad uno altro, talmẽte
              <lb/>
            ch’e’ nõ vi ſe ne poſſa tirare altro minore. </s>
            <s xml:id="echoid-s875" xml:space="preserve">La linea torta è vna parte di vn cer-
              <lb/>
            chio, il cerchio è quel diſegno fatto da lo vno de duoi punti, & </s>
            <s xml:id="echoid-s876" xml:space="preserve">girato talmẽte in
              <lb/>
            la medeſima ſuperficie, che in tutto il ſuo aggiramento, nõ ſia mai ne piu preſſo,
              <lb/>
            ne piu lontano, da quello immobile del mezo, che e’ ſi fuſſe quãdo e’ cominciò
              <lb/>
              <note position="left" xlink:label="note-025-05" xlink:href="note-025-05a" xml:space="preserve">25</note>
            da prima à girarſeli intorno. </s>
            <s xml:id="echoid-s877" xml:space="preserve">Ma a queſte coſe ſi dee aggiugnere, che la linea
              <lb/>
            torta, la qual noi dicẽmo ch’era parte d’vn cerchio, appreſſo dinoi qui Architet
              <lb/>
            tori, ꝑ via di ſimilitudine ſi chiamerà arco. </s>
            <s xml:id="echoid-s878" xml:space="preserve">Et quella linea che dai duoi pũti del
              <lb/>
            la linea torta ſi parte, & </s>
            <s xml:id="echoid-s879" xml:space="preserve">va diritta, ſi chiamerà ꝑ la medeſima ſimilitudine corda.
              <lb/>
            </s>
            <s xml:id="echoid-s880" xml:space="preserve">Et quella linea che partẽdoſi dal pũto del mezo della corda, & </s>
            <s xml:id="echoid-s881" xml:space="preserve">che laſciãdoſi da
              <lb/>
              <note position="left" xlink:label="note-025-06" xlink:href="note-025-06a" xml:space="preserve">30</note>
            ogni lato angoli vguali, andrà inſino all’arco, ſi chiamerà ſaetta. </s>
            <s xml:id="echoid-s882" xml:space="preserve">Et quella che
              <lb/>
            partẽdoſi dal pũto immobile ch’è dẽtro al cerchio, andrà ꝑ inſino alla linea tor
              <lb/>
            ta del cerchio ſi chiamerà raggio. </s>
            <s xml:id="echoid-s883" xml:space="preserve">Et queſto punto immobile che è dentro nel
              <lb/>
            mezo del cerchio ſi chiama centro. </s>
            <s xml:id="echoid-s884" xml:space="preserve">Et quella linea che paſſando per il cẽtro,
              <lb/>
            toccherà da amendue le bande il giro del cerchio, ſi chiamerà diametro.</s>
            <s xml:id="echoid-s885" xml:space="preserve"/>
          </p>
          <note position="left" xml:space="preserve">35</note>
          <figure number="3">
            <image file="025-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/025-01"/>
          </figure>
          <note position="left" xml:space="preserve">40</note>
          <p>
            <s xml:id="echoid-s886" xml:space="preserve">Gli archi ancora ſono differenti, percioche alcuno è intero, alcuno è ſcemo,
              <lb/>
            & </s>
            <s xml:id="echoid-s887" xml:space="preserve">alcuno è compoſto. </s>
            <s xml:id="echoid-s888" xml:space="preserve">Intero è quello che occupa la metà di vn cerchio, </s>
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