Vitruvius, I Dieci Libri dell' Architettvra di M. Vitrvvio, 1556

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            <s xml:id="echoid-s20469" xml:space="preserve">
              <pb o="240" file="0250" n="259" rhead="LIBRO"/>
            trapporta tutte le diſtanze dalb. </s>
            <s xml:id="echoid-s20470" xml:space="preserve">del Zodiaco alla linea del Cancro per ordine nelle linee delle hore del horologio. </s>
            <s xml:id="echoid-s20471" xml:space="preserve">diſſegnato il Cancro diß-
              <lb/>
            gnerai con la iſteſſa ragione tutte le altre linee ripportando alle linee delle hore dell’horologio le diſtanze del punto b. </s>
            <s xml:id="echoid-s20472" xml:space="preserve">& </s>
            <s xml:id="echoid-s20473" xml:space="preserve">de i punti delle hore
              <lb/>
            ſopra gli altri ſegni come hai fatto del Cancro, & </s>
            <s xml:id="echoid-s20474" xml:space="preserve">coſi hauerai formato i paralelli de i ſegni con mirabile giuſtezza. </s>
            <s xml:id="echoid-s20475" xml:space="preserve">Ma la lmea Equinottia-
              <lb/>
            le ſi forma in queſto modo, piglia dal Zodiaco la distanz a b c. </s>
            <s xml:id="echoid-s20476" xml:space="preserve">& </s>
            <s xml:id="echoid-s20477" xml:space="preserve">portala dal punto à dello horologio ſopra la linea delle 12. </s>
            <s xml:id="echoid-s20478" xml:space="preserve">& </s>
            <s xml:id="echoid-s20479" xml:space="preserve">fa un punto nal
              <lb/>
            quale taglier ai ad anguli giuſti la linea della 12 hora con una linea, laquale ti rappreſentera la linea Equinottiale. </s>
            <s xml:id="echoid-s20480" xml:space="preserve">Il luogo del Gnomone ſi tro
              <lb/>
            ua à queſto modo, piglia dal zodiaco Orizontale lo ſpacio dal b al c. </s>
            <s xml:id="echoid-s20481" xml:space="preserve">& </s>
            <s xml:id="echoid-s20482" xml:space="preserve">poni un piede al punto à dell’horologio, & </s>
            <s xml:id="echoid-s20483" xml:space="preserve">l’altro nella linea dell hora
              <lb/>
            12. </s>
            <s xml:id="echoid-s20484" xml:space="preserve">& </s>
            <s xml:id="echoid-s20485" xml:space="preserve">ti moſtrera doue hai à poner il Gnomone, & </s>
            <s xml:id="echoid-s20486" xml:space="preserve">quello, che detto hauemo dell’horologio Orizontale, ſe intende ancho dell’horologio del mu-
              <lb/>
            ro, ma biſogna trarre ciaſcuno dal ſuo propio zodiaco, & </s>
            <s xml:id="echoid-s20487" xml:space="preserve">noi di ſopra n’hauemo un’eſſempio. </s>
            <s xml:id="echoid-s20488" xml:space="preserve">Ma per deſcriuere un’horologio che
              <lb/>
              <figure xlink:label="fig-0250-01" xlink:href="fig-0250-01a" number="142">
                <variables xml:id="echoid-variables63" xml:space="preserve">♋ ♌ 7 8 9 10 11 12 ♍ a c ♎ b ♏ ♐ ♑</variables>
              </figure>
            guardag iusto à Leuante, & </s>
            <s xml:id="echoid-s20489" xml:space="preserve">un’altro, che riguardi à Ponente, con i ſegni,
              <lb/>
            biſogna apparecchiarli un zodiaco particolare, & </s>
            <s xml:id="echoid-s20490" xml:space="preserve">ſi fa à queſto modo. </s>
            <s xml:id="echoid-s20491" xml:space="preserve">Fa
              <lb/>
              <note position="left" xlink:label="note-0250-01" xlink:href="note-0250-01a" xml:space="preserve">10</note>
            uno zodiaco (come s’è detto) di ſopra, & </s>
            <s xml:id="echoid-s20492" xml:space="preserve">la linea, che riſponde alla Equinottia
              <lb/>
            le ſia a b. </s>
            <s xml:id="echoid-s20493" xml:space="preserve">& </s>
            <s xml:id="echoid-s20494" xml:space="preserve">l’a ſia come centro doue concorrino tutte le linee, & </s>
            <s xml:id="echoid-s20495" xml:space="preserve">dal fonda-
              <lb/>
            mento trapporta lo ſpacio c f. </s>
            <s xml:id="echoid-s20496" xml:space="preserve">nel zodiaco dallo a uerſo b. </s>
            <s xml:id="echoid-s20497" xml:space="preserve">& </s>
            <s xml:id="echoid-s20498" xml:space="preserve">ſegna iu! il pun-
              <lb/>
            to c. </s>
            <s xml:id="echoid-s20499" xml:space="preserve">trapporta ancho lo ſpacio che è nel fondamento dal punto c. </s>
            <s xml:id="echoid-s20500" xml:space="preserve">al punto del-
              <lb/>
            l’hora undecima nella linea K l. </s>
            <s xml:id="echoid-s20501" xml:space="preserve">al zodiaco dal punto a ſopra la linea a b. </s>
            <s xml:id="echoid-s20502" xml:space="preserve">& </s>
            <s xml:id="echoid-s20503" xml:space="preserve">il
              <lb/>
            ſimile farai di tutte l’altre hore del fondamento trapportandole ſopra la linea
              <lb/>
            a b. </s>
            <s xml:id="echoid-s20504" xml:space="preserve">& </s>
            <s xml:id="echoid-s20505" xml:space="preserve">facendo i punti ſecondo quelle distanze,. </s>
            <s xml:id="echoid-s20506" xml:space="preserve">Sopra i quali punti paſſar
              <lb/>
            deono le linee ad anguli giuſti con la linea a b. </s>
            <s xml:id="echoid-s20507" xml:space="preserve">& </s>
            <s xml:id="echoid-s20508" xml:space="preserve">tra ſe paralelle, che pasſino
              <lb/>
            dalla linea del Cancro, alla linea del Capricorno, & </s>
            <s xml:id="echoid-s20509" xml:space="preserve">coſi hauerai ſormato
              <lb/>
            l’Analemma, ò zodiaco per gli horologi da Leuante, & </s>
            <s xml:id="echoid-s20510" xml:space="preserve">da Ponente, & </s>
            <s xml:id="echoid-s20511" xml:space="preserve">la fi-
              <lb/>
            gura di queſto zodiaco e la preſente per fare adunque i predetti horologi.
              <lb/>
            </s>
            <s xml:id="echoid-s20512" xml:space="preserve">
              <note position="left" xlink:label="note-0250-02" xlink:href="note-0250-02a" xml:space="preserve">20</note>
            Tira una linea longa attrauerſata, & </s>
            <s xml:id="echoid-s20513" xml:space="preserve">ſopra quella ne cada una ad anguli giu-
              <lb/>
            ſti da una parte appreſſo un capo, & </s>
            <s xml:id="echoid-s20514" xml:space="preserve">un’altra ſimilmente cada dall’aliro ca-
              <lb/>
            po, dapoi piglia dal fondamento ſoprapoſto la diſtanza da f. </s>
            <s xml:id="echoid-s20515" xml:space="preserve">uerſo l. </s>
            <s xml:id="echoid-s20516" xml:space="preserve">al punto
              <lb/>
            dell’hora uendecima, & </s>
            <s xml:id="echoid-s20517" xml:space="preserve">trapportela di ſopra, & </s>
            <s xml:id="echoid-s20518" xml:space="preserve">di ſotto da i punti doue le li-
              <lb/>
            nee ſi tagliano nell’horologio, che dei fare. </s>
            <s xml:id="echoid-s20519" xml:space="preserve">Similmente dal fondamento rip-
              <lb/>
            porta la diſtanza dal f al punto della hora decima ſopra la linea K l. </s>
            <s xml:id="echoid-s20520" xml:space="preserve">al tuo ho-
              <lb/>
            rologio dal detto punto del taglio di quà e di là ſopra la linea perpẽd colare, il
              <lb/>
            ſimile farai trapportando dal fondamento tutte le diſtanze dal punto f a i pun-
              <lb/>
            ti delle hore ſopra la linea K l. </s>
            <s xml:id="echoid-s20521" xml:space="preserve">alla linea perpendicolare del tuo horologio, & </s>
            <s xml:id="echoid-s20522" xml:space="preserve">
              <lb/>
              <note position="left" xlink:label="note-0250-03" xlink:href="note-0250-03a" xml:space="preserve">03</note>
            ſegnati que punti, per esſi ad anguli dritti tirerai le linee paralelle alla linea
              <lb/>
            attrauerſata, & </s>
            <s xml:id="echoid-s20523" xml:space="preserve">la linea, che prima attrauerſata è la linea, che ſerue all’hora
              <lb/>
            ſeſta, & </s>
            <s xml:id="echoid-s20524" xml:space="preserve">nell’horologio da Leuante le prosſime linee ſerueno all’hora qumta,
              <lb/>
            & </s>
            <s xml:id="echoid-s20525" xml:space="preserve">ſettima quella di ſopra alla quinta, quella di ſotto alla ſettima, ma nell’ho-
              <lb/>
            rologio da Ponente quella di ſopra ſerue alla ſettima quella di ſotto alla quinta, & </s>
            <s xml:id="echoid-s20526" xml:space="preserve">coſi uanno ſeguitando, lo ſtile ſi pone ad anguli giusti ſu’l
              <lb/>
            toccamento dell’hora ſeſta, & </s>
            <s xml:id="echoid-s20527" xml:space="preserve">dell’Equinottiale, che ſono le due prime linee la attrauer ſata, & </s>
            <s xml:id="echoid-s20528" xml:space="preserve">la perpendicolare, formato l’horologio pone-
              <lb/>
            rai il zodiaco à queſto modo, piglia la diſtanza dal punto c. </s>
            <s xml:id="echoid-s20529" xml:space="preserve">alla linea del Cancro nel zodiaco, & </s>
            <s xml:id="echoid-s20530" xml:space="preserve">ripportela alla linea dell’hora ſeſta poncndo
              <lb/>
            il piede nel toccamento della linea dell’hora ſesta, & </s>
            <s xml:id="echoid-s20531" xml:space="preserve">dell’Equinottiale, & </s>
            <s xml:id="echoid-s20532" xml:space="preserve">l’altro nella destra ſopra la detta linea nell’horologio da Leuante, & </s>
            <s xml:id="echoid-s20533" xml:space="preserve">
              <lb/>
            nella ſiniſtra nel horologio da Ponente. </s>
            <s xml:id="echoid-s20534" xml:space="preserve">Dipoi piglia la diſtanza nel zodiaco dell’hora undecima della linea dell’Equinottiale alla linea del Can
              <lb/>
            cro, & </s>
            <s xml:id="echoid-s20535" xml:space="preserve">riponela dal taglio dell’hora ſettima con l’Equinottiale, dalla destra, dell’horologio da Leuante, & </s>
            <s xml:id="echoid-s20536" xml:space="preserve">dalla ſiniſtra del horologio da Ponen
              <lb/>
              <note position="left" xlink:label="note-0250-04" xlink:href="note-0250-04a" xml:space="preserve">40</note>
            te, & </s>
            <s xml:id="echoid-s20537" xml:space="preserve">coſi trapporterai dal zodiaco tutte le diſtanze delle hore, ne gli horologi, & </s>
            <s xml:id="echoid-s20538" xml:space="preserve">finita la linea del Cancro, ripponerai la linea del Leone e
              <lb/>
            della Vergine, & </s>
            <s xml:id="echoid-s20539" xml:space="preserve">de gli altri ſegni allo iſteſſo modo, & </s>
            <s xml:id="echoid-s20540" xml:space="preserve">quello, che hauerai fatto de i ſegni da una parte, lo faraidall’ altra uerſo il Capricorno.
              <lb/>
            </s>
            <s xml:id="echoid-s20541" xml:space="preserve">Continuando per longo con le lor linee i punti impresſi, e tratti dal zodiaco, la longhezza dello ſtile ſi piglia nel zodiaco triangolare dallo ſpa
              <lb/>
            cio, che è dallo a. </s>
            <s xml:id="echoid-s20542" xml:space="preserve">al c. </s>
            <s xml:id="echoid-s20543" xml:space="preserve">Et quì appreſſo ſono le figure. </s>
            <s xml:id="echoid-s20544" xml:space="preserve">Posto hauemo gli horologi nel piano, nel muro, & </s>
            <s xml:id="echoid-s20545" xml:space="preserve">nella ſoperficie Equinot-
              <lb/>
            tiale, ci reſtano tre coſe da fare, Puna
              <lb/>
            è la deſcrittione de gli horologi, che ſono
              <lb/>
              <figure xlink:label="fig-0250-02" xlink:href="fig-0250-02a" number="143">
                <variables xml:id="echoid-variables64" xml:space="preserve">11 ♊ ♋ ♌ ♈ orientale ♎ ♓ ♏ ♒ ♑ ♐ ſtilo ♑ ♐ ♏ ſtilo ♎ ♓ occidentale ♍ ♉ ♌ ♉ ♋ ♊ 8 7 6 5 4 3 2 1</variables>
              </figure>
            nel muro in altre facciate, che nel mezzo
              <lb/>
            di, nel Leuante, & </s>
            <s xml:id="echoid-s20546" xml:space="preserve">nel Ponente uero.
              <lb/>
            </s>
            <s xml:id="echoid-s20547" xml:space="preserve">L’altra la deſcrittione de gli horologi, che
              <lb/>
            hanno le hore, che cominciano dal tram-
              <lb/>
              <note position="left" xlink:label="note-0250-05" xlink:href="note-0250-05a" xml:space="preserve">50</note>
            mottar del Sole, & </s>
            <s xml:id="echoid-s20548" xml:space="preserve">uanno per hore 24.
              <lb/>
            </s>
            <s xml:id="echoid-s20549" xml:space="preserve">fin all’ altro trammontar del Sole. </s>
            <s xml:id="echoid-s20550" xml:space="preserve">La ter-
              <lb/>
            za, la deſcrittione di alcunihorologi, che
              <lb/>
            ſi mouono. </s>
            <s xml:id="echoid-s20551" xml:space="preserve">Quanto al deſcriuere gli ho
              <lb/>
            rologi, che ſono in facciate, che declinano
              <lb/>
            dal mezzo io dico, che la uia commoda, é
              <lb/>
            quella de gli ſtrumenti, e ſpecialmẽte uſan
              <lb/>
            do la mezza ſphera, laquale noi hauemo
              <lb/>
            deſcritta di ſopra. </s>
            <s xml:id="echoid-s20552" xml:space="preserve">Queſta ſi fora ne i
              <lb/>
            termini delle hore, & </s>
            <s xml:id="echoid-s20553" xml:space="preserve">nelle interſecatio-
              <lb/>
              <note position="left" xlink:label="note-0250-06" xlink:href="note-0250-06a" xml:space="preserve">60</note>
            ni de i circoli delle hore, con i paralelli de
              <lb/>
            i ſegni, & </s>
            <s xml:id="echoid-s20554" xml:space="preserve">per la punta del Gnomone, & </s>
            <s xml:id="echoid-s20555" xml:space="preserve">
              <lb/>
            per quelli fori ſi guarda, ò ſul piano Ori-
              <lb/>
            zontale, ò ſul piano Verticale, ò in qua-
              <lb/>
            lonche altra ſoperſicie, dapoi, che ſi ha-
              <lb/>
            uera giuſtata la mezza sfera al mezzodi
              <lb/>
            con la ſua linea Meridiana, & </s>
            <s xml:id="echoid-s20556" xml:space="preserve">che non
              <lb/>
            pieghi piu in una parte, che in un’altra, & </s>
            <s xml:id="echoid-s20557" xml:space="preserve">la doue ſopra le oppoſte ſoperficie riſpondera la uista, che paſſa per lo centro, & </s>
            <s xml:id="echoid-s20558" xml:space="preserve">per li ſori predetti
              <lb/>
            ſi faranno i ſegni, ò punti, che termineranno le hore, ecco ſe uuoi ſopra un muro fare un’horologio, ſia in che facciata eſſer ſi uoglia il muro,
              <lb/>
            poni la mezza palla dal muro tanto diſcoſta, quanto uuoi longo lo ſtile, & </s>
            <s xml:id="echoid-s20559" xml:space="preserve">fa che la line a Meridiana della mezza palla ſia uolta al mezzodi,
              <lb/>
              <note position="left" xlink:label="note-0250-07" xlink:href="note-0250-07a" xml:space="preserve">70</note>
            & </s>
            <s xml:id="echoid-s20560" xml:space="preserve">che la non pieghi à niuna parte, poi mira dal cẽtro, ò dalla punta dello ſtile per lo foro fatto nel tropico del Cãcro ſul mezzodi, & </s>
            <s xml:id="echoid-s20561" xml:space="preserve">la doue ti
              <lb/>
            porta la uiſta ſul muro fa un punto. </s>
            <s xml:id="echoid-s20562" xml:space="preserve">& </s>
            <s xml:id="echoid-s20563" xml:space="preserve">non uariando il ſito della mezza palla riguarda tuttauia per la punta dello ſtile, & </s>
            <s xml:id="echoid-s20564" xml:space="preserve">per lo foro fatto
              <lb/>
            nel tropico del Capricorno ſul mezzodi, et la doue ti porta la uiſta ſul muro fa un punto, & </s>
            <s xml:id="echoid-s20565" xml:space="preserve">coſi hauerai due pũtimeridiani, l’uno ſul tropi-
              <lb/>
            co del Cancro, l’altro ſul tropico del Capricorno, & </s>
            <s xml:id="echoid-s20566" xml:space="preserve">queſti congiugnerai con una linea, questa linea ti rappreſenta la linea Meridiana,
              <lb/>
            per tutto l’anno quando ſeràmezzodì, l’ombra della punta dello stile ti cadera ſu quella linea, quando poi uorrai ſegnar l’hora prima dopo
              <lb/>
            mezzodi ſtando tuttauia fermo lo ſtrumento mira a per la punta dello ſtile, & </s>
            <s xml:id="echoid-s20567" xml:space="preserve">per lo foro fatto nel tropico del Cancro ſull’hora prima, & </s>
            <s xml:id="echoid-s20568" xml:space="preserve"/>
          </p>
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      </text>
    </echo>
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