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

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        <div xml:id="echoid-div696" type="section" level="1" n="121">
          <pb o="245" file="0255" n="264" rhead="NONO."/>
          <p style="it">
            <s xml:id="echoid-s20918" xml:space="preserve">Molte belle inuentioni ſono ſtate quelle di Cteſibio, & </s>
            <s xml:id="echoid-s20919" xml:space="preserve">uoleſſe Iddio, che il tempo non ce le haueſſe rubbate. </s>
            <s xml:id="echoid-s20920" xml:space="preserve">Noi eſponeremo la mente di Vitr.
              <lb/>
            </s>
            <s xml:id="echoid-s20921" xml:space="preserve">con quella facilità, è breuità, che ſi puo in coſe tanto difficili. </s>
            <s xml:id="echoid-s20922" xml:space="preserve">Lo analemma deſcritto di ſopra ſer à il modulo del noſtro horologio. </s>
            <s xml:id="echoid-s20923" xml:space="preserve">piglia adun
              <lb/>
            que la line a lacotomus bg. </s>
            <s xml:id="echoid-s20924" xml:space="preserve">& </s>
            <s xml:id="echoid-s20925" xml:space="preserve">quella ſia il diametro d’una colonella fatta giustamente al torno, il circolo de i meſi r.</s>
            <s xml:id="echoid-s20926" xml:space="preserve">c.</s>
            <s xml:id="echoid-s20927" xml:space="preserve">g. </s>
            <s xml:id="echoid-s20928" xml:space="preserve">ſer à la circonferen-
              <lb/>
            za della colonella. </s>
            <s xml:id="echoid-s20929" xml:space="preserve">queſto diuider ai in 22 parti eguali nell’ ultima ſua circonferenza ſopra la teſta della colonella. </s>
            <s xml:id="echoid-s20930" xml:space="preserve">& </s>
            <s xml:id="echoid-s20931" xml:space="preserve">da ciaſcun punto della di
              <lb/>
            uiſione laſcier ai cader à piombo longo la colonnella le linee fin’all’ altra teſta, queste diuiderano lo ſtipite della colonella in dodici parti eguali
              <lb/>
            deputate à gli ſpacij de i dodici ſegni. </s>
            <s xml:id="echoid-s20932" xml:space="preserve">una di quelle linee, che cader à dalla teſta della linea lacotomus ſeruir à al principio del Cancro, l’altra,
              <lb/>
            che cader à dall’ altra parte ſeruir à al principio del Capricorno. </s>
            <s xml:id="echoid-s20933" xml:space="preserve">tir ata poi una linea ſopra la teſta della colonnella in croce alla linea lacoto-
              <lb/>
            mus una di quella linea, che cader à dall’ una delle teſte ci ſeruir à al principio del Montone, l’altra al principio della Bilanza. </s>
            <s xml:id="echoid-s20934" xml:space="preserve">ma le altre linee,
              <lb/>
            che caderanno da gli altri punti ci ſeruiranno à i principij de gli altri meſi, come fanno le linee tirate ne i Cilindri. </s>
            <s xml:id="echoid-s20935" xml:space="preserve">Diſſegnerai anco uolendo
              <lb/>
            di grado in grado le linee per ogni ſegno al modo ſopra poſto, piglia poi dallo analẽma lo ſpacio che è dallo a al n. </s>
            <s xml:id="echoid-s20936" xml:space="preserve">ſopra l’equinottiale & </s>
            <s xml:id="echoid-s20937" xml:space="preserve">quello
              <lb/>
              <note position="left" xlink:label="note-0255-01" xlink:href="note-0255-01a" xml:space="preserve">10</note>
            diuider ai in dodici parti eguali, il ſimile farai dello ſpacio dallo a al x. </s>
            <s xml:id="echoid-s20938" xml:space="preserve">& </s>
            <s xml:id="echoid-s20939" xml:space="preserve">quelle parti ſiano trapportate nella colonnella ſopra le linee del Mon
              <lb/>
            tone, & </s>
            <s xml:id="echoid-s20940" xml:space="preserve">della Bilancia. </s>
            <s xml:id="echoid-s20941" xml:space="preserve">ſimilmente piglia dallo analemma lo ſpacio che é da y al K. </s>
            <s xml:id="echoid-s20942" xml:space="preserve">& </s>
            <s xml:id="echoid-s20943" xml:space="preserve">dallo ſ al g. </s>
            <s xml:id="echoid-s20944" xml:space="preserve">che è quello isteſſo e partirailo in 12 parti
              <lb/>
            eguali, & </s>
            <s xml:id="echoid-s20945" xml:space="preserve">quelle trapporterai dallo analemma alle linee del Cancro, & </s>
            <s xml:id="echoid-s20946" xml:space="preserve">del Capricorno nella colonnella, ma quelle del Cancro comincierai à
              <lb/>
            ſegnar dal baſſo, & </s>
            <s xml:id="echoid-s20947" xml:space="preserve">anderai all’inſu. </s>
            <s xml:id="echoid-s20948" xml:space="preserve">& </s>
            <s xml:id="echoid-s20949" xml:space="preserve">quelle del Capricorno ſegnerai al contrario dal diſopra al baſſo. </s>
            <s xml:id="echoid-s20950" xml:space="preserve">il ſimile farai tirando nello analem-
              <lb/>
            mairaggi de gli altri ſegni, & </s>
            <s xml:id="echoid-s20951" xml:space="preserve">quella parte de i diametri, che ſer à ſopra l’orizonte e a i. </s>
            <s xml:id="echoid-s20952" xml:space="preserve">partirai in dodici parti, & </s>
            <s xml:id="echoid-s20953" xml:space="preserve">quelle trapportera@ nelia
              <lb/>
            colonnella alle ſue propie linee. </s>
            <s xml:id="echoid-s20954" xml:space="preserve">ſimilmente il reſtante de i diametri ſotto l’orizonte partir ai in dodici parti, & </s>
            <s xml:id="echoid-s20955" xml:space="preserve">quelli trapporter ai, come le al-
              <lb/>
            tre nella colonnella, & </s>
            <s xml:id="echoid-s20956" xml:space="preserve">tutti quelli punti delle diuiſioni fatte legherai con linee, queſte linee ſeranno le linee delle hore creſcenti per ordine, & </s>
            <s xml:id="echoid-s20957" xml:space="preserve">
              <lb/>
            ſcemanti ſecondo il corſo del Sole. </s>
            <s xml:id="echoid-s20958" xml:space="preserve">però le aggiugnerai i loro numeri di ſotto. </s>
            <s xml:id="echoid-s20959" xml:space="preserve">& </s>
            <s xml:id="echoid-s20960" xml:space="preserve">i caratteri, ò le figure de i ſegni celeſti, al ſuo luogo, come ſi
              <lb/>
            fa ne i Cilindri. </s>
            <s xml:id="echoid-s20961" xml:space="preserve">Drizzerai queſta colonnella ſopra un piano, & </s>
            <s xml:id="echoid-s20962" xml:space="preserve">con un perno nel mezzo centro dal baſſo la poner ai in un, foro di modo, che
              <lb/>
            la ſi poſſa girare, ma prima circonder ai il piede della colonna con un cerchiello dentato à torno di 360 denti accioche ſtando la colonna dritta
              <lb/>
              <note position="left" xlink:label="note-0255-02" xlink:href="note-0255-02a" xml:space="preserve">20</note>
            una ruota posta in piano dentata ſimilmente ogni giorno faccia, che la colonnella ſi moua un grado, ma la ruota piana ſera moſſa da un’altra
              <lb/>
            ruota pur in piano da un dentello, che ne l’uno de capi del ſuo perno ſi pone, & </s>
            <s xml:id="echoid-s20963" xml:space="preserve">queſta ruota è gir ata da un’altra con pari denti, ma po-
              <lb/>
            ſta in coltello & </s>
            <s xml:id="echoid-s20964" xml:space="preserve">è dentata in fronte, tal che ognuna di loro girerà una uolta il giorno, ſecondo che ſi mouerà il ſuo perno, ilqual perno hauen-
              <lb/>
            do inuolta una fune dall’uno de i ſuoi capi hauera un ſecchie
              <unsure/>
            llo riuerſcio, & </s>
            <s xml:id="echoid-s20965" xml:space="preserve">dall’altra un contrapeſo di peſo eguale. </s>
            <s xml:id="echoid-s20966" xml:space="preserve">Ma il ſecchiello ſer à in
              <lb/>
            un uaſo, nelquale u’entrerà l’acqua, che cader à giu da un’altro uaſo, & </s>
            <s xml:id="echoid-s20967" xml:space="preserve">coſi montando l’acqua, ſi ſolleuer à il ſecchiello, & </s>
            <s xml:id="echoid-s20968" xml:space="preserve">il contrapeſo far à
              <lb/>
            girar il perno, il perno girerà il Timpano ò la ruot@ in coltello, & </s>
            <s xml:id="echoid-s20969" xml:space="preserve">quella in coltello mouerà la ruota posta in piano, laquale con lo dentel-
              <lb/>
            lo, che hauer à in capo del ſuo perno, dar à il mouimento à quella, che ogni giorno mouer à la colonnella un grado, & </s>
            <s xml:id="echoid-s20970" xml:space="preserve">coſi in capo l’anno la colon
              <lb/>
            nella hauer à fatto un giro. </s>
            <s xml:id="echoid-s20971" xml:space="preserve">Ma per dunoſtrar le hore, egli biſogna temperar l’acqua in queſto modo.</s>
            <s xml:id="echoid-s20972" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s20973" xml:space="preserve">Fa tornire due Mete ò coni di rame con diligenza, una dellequali ſi far à uota, & </s>
            <s xml:id="echoid-s20974" xml:space="preserve">ſer à come femina, laquale nella ſua punta hauer à un foro ſottile
              <lb/>
            fatto in un cauetto d’oro, ò d’una Gemma, l’altra Meta ſer à ſoda, & </s>
            <s xml:id="echoid-s20975" xml:space="preserve">come maſchio entrera nella femina, & </s>
            <s xml:id="echoid-s20976" xml:space="preserve">hauer à attacca a una regola
              <lb/>
              <note position="left" xlink:label="note-0255-03" xlink:href="note-0255-03a" xml:space="preserve">30</note>
            dritta nel mezzo dalla parte piu groſſa, laquale bauerà nel mezzo per longo una apritura, nella qual apritura, hanno ad entr ar alcuni cu
              <lb/>
            nei maggiori, ò minori ſecondo il biſogno della car catura, ò tempra dell’ acqua. </s>
            <s xml:id="echoid-s20977" xml:space="preserve">Et la femina ſia accommodata in un ordimento, ò telaro di le-
              <lb/>
            gname, come nella ſigura ſi uede; </s>
            <s xml:id="echoid-s20978" xml:space="preserve">& </s>
            <s xml:id="echoid-s20979" xml:space="preserve">la regola, ò manico del maſcolo ſia retto, & </s>
            <s xml:id="echoid-s20980" xml:space="preserve">gouernato da due registri, et cunei come il diſſegno d@nostra.
              <lb/>
            </s>
            <s xml:id="echoid-s20981" xml:space="preserve">Siano poſte queſte Mete in modo, che dal di ſopra da un uaſo, che Vitr. </s>
            <s xml:id="echoid-s20982" xml:space="preserve">chiama caſtello, ui cada l’acqua dentro, io dico, che ſel maſchio col poner
              <lb/>
            ui de i cunei ſera alzato ſuori della femina, quanto piu d’acqua entrer à nella ſemina, entrando l’acqua con maggior impeto, tanto piu ne uſci-
              <lb/>
            rà di ſotto dal Cauetto in un uaſo per queſto apparecchiato. </s>
            <s xml:id="echoid-s20983" xml:space="preserve">Siche uolendo noi, che eſca piu acqua biſogner à ſegnar il cuneo, ò porui uno mag
              <lb/>
            giore, ò aggiugnerui de gli altri di modo, che la isteſſa regola attaccata al maſchio lo leui piu, ò meno ſecondo il biſogno, l’acqua adunque diſcen
              <lb/>
            dendo in un uaſo alzer à uno ſecchiello riuerſo, ſu ilquale poſer à una regola ò uerga mobile, dallaquale uſcir à una figurina, che uoltata uerſo
              <lb/>
            le hore diſſegnate nella colonnella alzandoſi, & </s>
            <s xml:id="echoid-s20984" xml:space="preserve">abbaſſandoſi ſecondo la tempra dell’acqua, dimoſtrer à ogni giorno le hore, mentre la colon-
              <lb/>
            nella dar à uolta un grado ogni di. </s>
            <s xml:id="echoid-s20985" xml:space="preserve">Et quando i giorni comincier anno à declinare, non ſi piglier a piu l’acqua dal castello, ma ſi apriranno le
              <lb/>
              <note position="left" xlink:label="note-0255-04" xlink:href="note-0255-04a" xml:space="preserve">40</note>
            Mete che ſaranno in ſondo del uaſo per lequale con i loro cunei accommodati al diſcreſcere de i giorni uſcir à l’acqua del uaſo, & </s>
            <s xml:id="echoid-s20986" xml:space="preserve">attaccan-
              <lb/>
            do il ſicchielio al capo del contrapeſo, & </s>
            <s xml:id="echoid-s20987" xml:space="preserve">il contrapeſo à quello, che era attaccato il ſecchiello per lo calar dell’acqua nel uaſo il ſecchiello ſi
              <lb/>
            abbaſſer à & </s>
            <s xml:id="echoid-s20988" xml:space="preserve">la figurina ancor lei ſe uenir à abbaſſando & </s>
            <s xml:id="echoid-s20989" xml:space="preserve">moſtrer à l’hore, & </s>
            <s xml:id="echoid-s20990" xml:space="preserve">i gradi de i ſegni di giorno, in giorno, come e detto di ſopra. </s>
            <s xml:id="echoid-s20991" xml:space="preserve">Et
              <lb/>
            inuero è bella inuentione, conoſciuta dal Marcolino, & </s>
            <s xml:id="echoid-s20992" xml:space="preserve">ci dimostra molte belle coſe, come parer à àchi ne far à la proud.</s>
            <s xml:id="echoid-s20993" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s20994" xml:space="preserve">L’altra forma di horologio è bellißima, & </s>
            <s xml:id="echoid-s20995" xml:space="preserve">molto artificioſa, & </s>
            <s xml:id="echoid-s20996" xml:space="preserve">utile alla dimoſtratione delle coſe celeſti, & </s>
            <s xml:id="echoid-s20997" xml:space="preserve">ſi fa in queſto modo, & </s>
            <s xml:id="echoid-s20998" xml:space="preserve">é diuiſo
              <lb/>
            queſto trattamento da Vitr. </s>
            <s xml:id="echoid-s20999" xml:space="preserve">in due parti, l’una è la compoſitione dello horologio, l’altra è la tempra dell’acqua, ſimilmente la compoſitione
              <lb/>
            dello horologio è diuiſa in due parti, Puna è la deſcruttione delle hore, l’altra è la deſcrittione del Cielo, & </s>
            <s xml:id="echoid-s21000" xml:space="preserve">Zodiaco, la deſcrittione delle
              <lb/>
            hore è preſa dallo analemma, ma Vitr. </s>
            <s xml:id="echoid-s21001" xml:space="preserve">non inſegna à che modo, ſimilmente ancho egli non ce inſegna il modo di deſcriuere il cielo, & </s>
            <s xml:id="echoid-s21002" xml:space="preserve">il Zodia
              <lb/>
            co, però partitamente to eſponerò ſecondo, che io la intendo. </s>
            <s xml:id="echoid-s21003" xml:space="preserve">Lo analemma adunque ſi piglia dalla sfera poſta in piano con ragione di proſpet
              <lb/>
            tiua, ſecondo, che ſi deſcriue una tauola dello A ſtrolabio. </s>
            <s xml:id="echoid-s21004" xml:space="preserve">Il modo é queſto. </s>
            <s xml:id="echoid-s21005" xml:space="preserve">Sia fatto un circolo a b c d. </s>
            <s xml:id="echoid-s21006" xml:space="preserve">in quattro parti da due diametri diui-
              <lb/>
              <note position="left" xlink:label="note-0255-05" xlink:href="note-0255-05a" xml:space="preserve">50</note>
            ſo, Queſto circolo rappreſenta il tropico del Capricorno, dentro delquale ſi ba à formare, & </s>
            <s xml:id="echoid-s21007" xml:space="preserve">lo equinottiale, & </s>
            <s xml:id="echoid-s21008" xml:space="preserve">il tropico del Cancro, iquali
              <lb/>
            circoli ſono minori per ragione di proſpettiua, perche noi ſe imaginamo di tener l’occhio noſtro nel polo oppoſto al noſtro, & </s>
            <s xml:id="echoid-s21009" xml:space="preserve">guardar uerſo
              <lb/>
            il noſtro polo: </s>
            <s xml:id="echoid-s21010" xml:space="preserve">certo è che il circolo del Capricorno ci uerr à prima incontro, dapoiuerr à l’equinottiale, & </s>
            <s xml:id="echoid-s21011" xml:space="preserve">in fin il tropico del Cancro, & </s>
            <s xml:id="echoid-s21012" xml:space="preserve">an
              <lb/>
            cho il tropico del Capricorno ci parer à maggiore, perche ſi ueder à ſotto maggior angulo, & </s>
            <s xml:id="echoid-s21013" xml:space="preserve">per eſſer piu uicino all’occhio, & </s>
            <s xml:id="echoid-s21014" xml:space="preserve">il tropico del
              <lb/>
            Cancro ci parer à minore, & </s>
            <s xml:id="echoid-s21015" xml:space="preserve">per eſſer piu lontano ſi ueder à ſotto angulo piu stretto, & </s>
            <s xml:id="echoid-s21016" xml:space="preserve">coſi l’equinottiale ſer à maggiore del tropico del Can-
              <lb/>
            cro, & </s>
            <s xml:id="echoid-s21017" xml:space="preserve">minore del tropico del Capricorno per le iſteſſe ragioni, & </s>
            <s xml:id="echoid-s21018" xml:space="preserve">queſto ſi deue auuertire, perche è coſa bella, & </s>
            <s xml:id="echoid-s21019" xml:space="preserve">ſecreta, per formare adu
              <gap/>
            -
              <lb/>
            que l’equinottiale, egli ſi piglia la declination del Sole dal punto b uerſo la a. </s>
            <s xml:id="echoid-s21020" xml:space="preserve">& </s>
            <s xml:id="echoid-s21021" xml:space="preserve">ſi ſegna al ſuo termine il punto f. </s>
            <s xml:id="echoid-s21022" xml:space="preserve">dalquale ſi tirano due linee l’u
              <lb/>
            na al centro e. </s>
            <s xml:id="echoid-s21023" xml:space="preserve">l’altra al punto c. </s>
            <s xml:id="echoid-s21024" xml:space="preserve">& </s>
            <s xml:id="echoid-s21025" xml:space="preserve">doue la linea f c. </s>
            <s xml:id="echoid-s21026" xml:space="preserve">taglia la linea b d. </s>
            <s xml:id="echoid-s21027" xml:space="preserve">che in queſto caſo è la linea meridiana, ſi fa punto b. </s>
            <s xml:id="echoid-s21028" xml:space="preserve">& </s>
            <s xml:id="echoid-s21029" xml:space="preserve">allargata la ſe-
              <lb/>
            ſta dal centro e, al punto b. </s>
            <s xml:id="echoid-s21030" xml:space="preserve">ſi fa un circolo, ſh K z. </s>
            <s xml:id="echoid-s21031" xml:space="preserve">ilquale ci ſerue per lo equinottiole, & </s>
            <s xml:id="echoid-s21032" xml:space="preserve">la doue la linea f c. </s>
            <s xml:id="echoid-s21033" xml:space="preserve">taglia l’equinottiale, ſi fa il pun-
              <lb/>
            to i, & </s>
            <s xml:id="echoid-s21034" xml:space="preserve">dal punto i al punto K ſi tira una linea, la doue ella taglia la linea b d. </s>
            <s xml:id="echoid-s21035" xml:space="preserve">ſi fa il punto l, & </s>
            <s xml:id="echoid-s21036" xml:space="preserve">allargata la ſesta dal centro e al punto l. </s>
            <s xml:id="echoid-s21037" xml:space="preserve">ſi fa
              <lb/>
              <note position="left" xlink:label="note-0255-06" xlink:href="note-0255-06a" xml:space="preserve">60</note>
            un circolo, che ci ſerue per lo tropico del Cancro, & </s>
            <s xml:id="echoid-s21038" xml:space="preserve">coſi hauemo tre circoli due tropici, & </s>
            <s xml:id="echoid-s21039" xml:space="preserve">uno equinottiale. </s>
            <s xml:id="echoid-s21040" xml:space="preserve">biſogna poi ſegnari l’orizonte
              <lb/>
            à queſto modo, piglia la eleuatione del polo, che qui ſer à 45 gradi nella quarta K b. </s>
            <s xml:id="echoid-s21041" xml:space="preserve">dello equinottiale cominciando à numerare dal punto K. </s>
            <s xml:id="echoid-s21042" xml:space="preserve">et
              <lb/>
            dal punto della eleuatione, che ſer à m. </s>
            <s xml:id="echoid-s21043" xml:space="preserve">per lo centro ſi tiri una linea alla parte oppoſta nell’equinottiale, & </s>
            <s xml:id="echoid-s21044" xml:space="preserve">doue ella termina ſia ſegnato n. </s>
            <s xml:id="echoid-s21045" xml:space="preserve">da
              <lb/>
            poi dal punto K al punto n ſia tir ata una linea, & </s>
            <s xml:id="echoid-s21046" xml:space="preserve">doue quella taglia la linea b d. </s>
            <s xml:id="echoid-s21047" xml:space="preserve">ſia ſegnato ò ſimilmente dal punto K ſia tirata un’altra linea
              <lb/>
            per lo punto m, che paßi fin alla linea b d. </s>
            <s xml:id="echoid-s21048" xml:space="preserve">prolongata, & </s>
            <s xml:id="echoid-s21049" xml:space="preserve">la doue ella tocca la linea b d ſi ſegna p. </s>
            <s xml:id="echoid-s21050" xml:space="preserve">& </s>
            <s xml:id="echoid-s21051" xml:space="preserve">tra lo p & </s>
            <s xml:id="echoid-s21052" xml:space="preserve">lo o ſi troua il mezzo ſopra
              <lb/>
            la linea p b d & </s>
            <s xml:id="echoid-s21053" xml:space="preserve">iui ſi ſegna q. </s>
            <s xml:id="echoid-s21054" xml:space="preserve">& </s>
            <s xml:id="echoid-s21055" xml:space="preserve">allargata la ſeſta dal q allo o, ſi fa dentro del circolo del Tropico del Capricorno una parte di circolo r o t.
              <lb/>
            </s>
            <s xml:id="echoid-s21056" xml:space="preserve">queſto è l’orizonte obliquo. </s>
            <s xml:id="echoid-s21057" xml:space="preserve">Dapoi per ſegnar le hore ſi partono tutti gli archi de i circoli fatti di ſopra l’orizonte ciaſcuno in dodici parti
              <lb/>
            eguali, & </s>
            <s xml:id="echoid-s21058" xml:space="preserve">coſi gli archi di ſotto in dodici parti, & </s>
            <s xml:id="echoid-s21059" xml:space="preserve">per la regola di trouar il centro de i tre punti ſi legano inſieme i punti de i tropici, con i
              <lb/>
            punti equinottiali, i primi con i primi, i ſecondi con i ſecondi, & </s>
            <s xml:id="echoid-s21060" xml:space="preserve">coſi per ordine. </s>
            <s xml:id="echoid-s21061" xml:space="preserve">& </s>
            <s xml:id="echoid-s21062" xml:space="preserve">à queſto modo ſeranno ſegnate le hore, lequali Vitr. </s>
            <s xml:id="echoid-s21063" xml:space="preserve">uuole
              <lb/>
            che ſiano fatte di uerge di rame, perche ſotto di eſſe ui ha da andare un Timpano, che ba il Zodiaco, & </s>
            <s xml:id="echoid-s21064" xml:space="preserve">il Cielo diſſegnato, però accioche ſi ue
              <lb/>
              <note position="left" xlink:label="note-0255-07" xlink:href="note-0255-07a" xml:space="preserve">70</note>
            da di ſotto, è neceſſario far queſte uirgule, i cui quadretti io ho adombrati, perche s’intenda, che ſono tagliati, e forati. </s>
            <s xml:id="echoid-s21065" xml:space="preserve">Dapoi queſto egli ſi
              <lb/>
            fa un Timpano, & </s>
            <s xml:id="echoid-s21066" xml:space="preserve">ſe gli dipigne ſopra le Stelle & </s>
            <s xml:id="echoid-s21067" xml:space="preserve">il Zodiaco, queſti ſimilmente è preſo dalla rete dello Aſtrolabio, & </s>
            <s xml:id="echoid-s21068" xml:space="preserve">ſi fa in que@to modo for
              <lb/>
            maſi un’ altro piano con i tre cerchi fatti di quella grandezza, & </s>
            <s xml:id="echoid-s21069" xml:space="preserve">con quella ragione di prima poi egli ſi piglia lo ſpacio di mezzo tr a il pun-
              <lb/>
            to b. </s>
            <s xml:id="echoid-s21070" xml:space="preserve">& </s>
            <s xml:id="echoid-s21071" xml:space="preserve">il punto x. </s>
            <s xml:id="echoid-s21072" xml:space="preserve">ſopra la linea b c d. </s>
            <s xml:id="echoid-s21073" xml:space="preserve">& </s>
            <s xml:id="echoid-s21074" xml:space="preserve">iui poſta la ſeſta, & </s>
            <s xml:id="echoid-s21075" xml:space="preserve">allargatta fin al punto x. </s>
            <s xml:id="echoid-s21076" xml:space="preserve">ſi fa un circolo, questi ci rappreſenta la uia del Sole.
              <lb/>
            </s>
            <s xml:id="echoid-s21077" xml:space="preserve">Eccliptica nominata, ſopra laquale s’hanno à porre i gradi de i ſegni, ilche ſi fa in queſto modo, partirai lo equinottiale in parti 360 </s>
          </p>
        </div>
      </text>
    </echo>
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