Heron Alexandrinus, Di Herone Alessandrino De gli automati : ouero machine semoventi, libri due, 1589

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          <pb o="38" file="0079" n="79" rhead="LIBRO SECONDO."/>
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            <s xml:id="echoid-s864" xml:space="preserve">Chiuſa poi, & </s>
            <s xml:id="echoid-s865" xml:space="preserve">aperta la tauola, noi diciamo, che
              <unsure/>
            niente al
              <lb/>
            tro ſi vede, eccetto che aere, emare dipinto, e dopo que-
              <lb/>
            ſto, chele naui cominciano à paſſare oltra nauigando.
              <lb/>
            </s>
            <s xml:id="echoid-s866" xml:space="preserve">Fare
              <unsure/>
            mo dunque, quãto s’aſpetta alla nauigatione, in que
              <unsure/>
            -
              <lb/>
            ſto modo. </s>
            <s xml:id="echoid-s867" xml:space="preserve">Dilà, & </s>
            <s xml:id="echoid-s868" xml:space="preserve">di quà dalle partite vicino à i gan-
              <lb/>
            gheri hauerà la tauola luoghi vacui circondati di tauole,
              <lb/>
            iquali di fuori habbiano ſomiglianza di ſtipiti. </s>
            <s xml:id="echoid-s869" xml:space="preserve">Dentro
              <lb/>
            queſtiluoghivacui circondati di tauole, ſi pongono rigo-
              <lb/>
            letti quadri, e di lati eguali, e diritti, gli angoli de
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            li ſaranno ſinuſſati. </s>
            <s xml:id="echoid-s870" xml:space="preserve">Queſti ſaranno d’abete, accioche
              <lb/>
            eſſendo ſottilinon ſitorcano, dalla parte di loro, che ſtà
              <lb/>
            diſotto, ſaranno punte di metallo ben tornite, ſotto le-
              <lb/>
            quali ſaranno moggioletti, accioche poſſano faciliſsima-
              <lb/>
            me
              <unsure/>
            nte girarſi. </s>
            <s xml:id="echoid-s871" xml:space="preserve">La parte poi da cima haueranno rotonda, e
              <lb/>
            pulita, e fi caccieranno nel lato della caſſetta di ſopra, che
              <lb/>
            è forata; </s>
            <s xml:id="echoid-s872" xml:space="preserve">di maniera che non vi ſtringano, nè anco vi ſtia-
              <lb/>
            no troppo da largo nel voltarſi. </s>
            <s xml:id="echoid-s873" xml:space="preserve">Fatte queſte coſe, biſo-
              <lb/>
            gna, pigliando vna carta ſottiliſsima di quelle, che ſi chia
              <lb/>
            mano reali, tagliar tanto della longhezza ſua, che co- pratutta l’altezza del piano della tauola infino alle tele a-
              <lb/>
            uiluppate; </s>
            <s xml:id="echoid-s874" xml:space="preserve">e tagliando l’eſtremità della carta, l’incollere-
              <lb/>
            mo al rigoletto, che è dalla parte deſtra dellatauola,
              <note symbol="10" position="left" xlink:label="note-0079-02" xlink:href="note-0079-02a" xml:space="preserve"/>
            maniera, chein luogo dell’eſtremità, vi ſia incollato il ri-
              <lb/>
            goletto; </s>
            <s xml:id="echoid-s875" xml:space="preserve">voltando poiquella parte del rigoletto, che ſo-
              <lb/>
            prauanza ſopra la tauola, v’auilupperemo la carta. </s>
            <s xml:id="echoid-s876" xml:space="preserve">Que-
              <lb/>
            ſto ſi gira tanto, mentre le
              <unsure/>
            partite ſono ſerrate, che ſi cuo-
              <lb/>
            pre tutto il piano della tauola con la carta, ilche
              <unsure/>
            è quan-
              <lb/>
            do ſiè accoſtata all altr
              <unsure/>
            o rigolo. </s>
            <s xml:id="echoid-s877" xml:space="preserve">Ilche fatto, ſe ve ne auan-
              <lb/>
            za, ſitaglia. </s>
            <s xml:id="echoid-s878" xml:space="preserve">Biſogna in collare in capo dela carta vna li-
              <lb/>
            ſtetta ſottiliſsima. </s>
            <s xml:id="echoid-s879" xml:space="preserve">Stiaſi dunque il viluppo naſcoſto die-
              <lb/>
            trolo ſtipite di maniera, che aperta la tauola non ſi veda.
              <lb/>
            </s>
            <s xml:id="echoid-s880" xml:space="preserve">Attacco poi corde ſottili alla liſtetta, che è incollata nel
              <lb/>
            capo della carta, vna da baſſo dello ſtipite dellatauola, &</s>
            <s xml:id="echoid-s881" xml:space="preserve"/>
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