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

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          <p style="it">
            <s xml:id="echoid-s21077" xml:space="preserve">
              <pb o="246" file="0256" n="265" rhead="LIBRO"/>
            do dal punto ſ. </s>
            <s xml:id="echoid-s21078" xml:space="preserve">& </s>
            <s xml:id="echoid-s21079" xml:space="preserve">paſſando per lo punto o K h. </s>
            <s xml:id="echoid-s21080" xml:space="preserve">fin che ſi torni al punto ſ, dapoi ſi numer a dal punto ſ, uerſo il punto o l’aſcendimento dritto
              <lb/>
            di ogni ſegno, ilche ſi fa à questo modo. </s>
            <s xml:id="echoid-s21081" xml:space="preserve">Entra nella tauola ſottopoſta con l’intiero ſegno del Montone, cioè con trenta gradi di eſſo, & </s>
            <s xml:id="echoid-s21082" xml:space="preserve">troucrai
              <lb/>
            all’incontro gradi 27 minuti 54, queſti numererai nello equinottiale dal punto ſ uer ſo il punto o. </s>
            <s xml:id="echoid-s21083" xml:space="preserve">& </s>
            <s xml:id="echoid-s21084" xml:space="preserve">la doue termineranno fa un punto, & </s>
            <s xml:id="echoid-s21085" xml:space="preserve">da
              <lb/>
            quel punto al centro tira una linea occulta, & </s>
            <s xml:id="echoid-s21086" xml:space="preserve">la doue ella taglia la Eccliptica fa un punto iui ſerà il termine del Montone, coſi trouerai nella
              <lb/>
            tauola 37 gradi, & </s>
            <s xml:id="echoid-s21087" xml:space="preserve">minuti 48 per lo dritto aſcendimento di tutto il Toro, & </s>
            <s xml:id="echoid-s21088" xml:space="preserve">iripporterai allo iſteſſo modo dal centro ſopra la Eccliptica, & </s>
            <s xml:id="echoid-s21089" xml:space="preserve">
              <lb/>
            iui ſer à il fine del Toro, & </s>
            <s xml:id="echoid-s21090" xml:space="preserve">coſi di mano in mano compartirai con l’aiuto della tauola tutta la Eccliptica, non ſolamente ſegnandoui i principi
              <lb/>
            de i Segni, ma ancho i gradi, & </s>
            <s xml:id="echoid-s21091" xml:space="preserve">in ogni grado farai un foro nella circoferenza della Eccliptica, nel qual foro di giorno in giorno trapporterai
              <lb/>
            la bolla, che Vitr. </s>
            <s xml:id="echoid-s21092" xml:space="preserve">intende per lo Sole, che moſtra le hore ne gli horologi, il Timpano coſi diſſegnato ſer à poſto drieto le linee delle hore, & </s>
            <s xml:id="echoid-s21093" xml:space="preserve">o-
              <lb/>
            gni di ſi uolta compiut amente una uolta, ma la bolla stando ferma per un di nel grado, & </s>
            <s xml:id="echoid-s21094" xml:space="preserve">nel foro di quel Segno doue ſi troua il Sole moſtrerà
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            l’arco diurno, & </s>
            <s xml:id="echoid-s21095" xml:space="preserve">le hore, ſecondo il creſcere, & </s>
            <s xml:id="echoid-s21096" xml:space="preserve">il calar de i giorni, & </s>
            <s xml:id="echoid-s21097" xml:space="preserve">delle hore, il Timpano ſi uolge come s’ è detto di ſopra hauendo nel mez
              <lb/>
            zo fitto un fuſo, d’intorno ilquale è una catena molle come dice Vitr. </s>
            <s xml:id="echoid-s21098" xml:space="preserve">cioè di anelli ritorti e corti come la lettera S. </s>
            <s xml:id="echoid-s21099" xml:space="preserve">di modo, che la ſi uolga fa
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            cilmente, & </s>
            <s xml:id="echoid-s21100" xml:space="preserve">da uno capo ha uno ſecchiello, & </s>
            <s xml:id="echoid-s21101" xml:space="preserve">dall’altro un contrapeſo di peſo di peſo eguale al ſecchiello, ilqual ſecchiello eſſendo dall’acqua ſolleuato
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            fa che la catena ſi ſuolge, & </s>
            <s xml:id="echoid-s21102" xml:space="preserve">il fuſo ſi moue, & </s>
            <s xml:id="echoid-s21103" xml:space="preserve">il fuſo moſſo uolta il Timpano. </s>
            <s xml:id="echoid-s21104" xml:space="preserve">Ma come eg li ſi habbia à temprar l’acqua, accioche ogni gior-
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            no ſi ueda queſta differenza delle hore Vitr. </s>
            <s xml:id="echoid-s21105" xml:space="preserve">ce lo inſegna. </s>
            <s xml:id="echoid-s21106" xml:space="preserve">Ma prima che io lo eſpona ponerò la tauola de i dritti aſcendimenti de i ſegni, fa-
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            cendo auuertito chi legge, che ſopra queſto Timpano egli ſi puo porre le ſtelle come ſtanno nel cielo, & </s>
            <s xml:id="echoid-s21107" xml:space="preserve">uedere i loro naſcimenti, le altezze, i
              <lb/>
            cadimenti, le latitudini, & </s>
            <s xml:id="echoid-s21108" xml:space="preserve">tutte quelle coſe, che nello Aſtrolabio ſi uedono, ilche porta diletto & </s>
            <s xml:id="echoid-s21109" xml:space="preserve">utile, à chi l’intende.</s>
            <s xml:id="echoid-s21110" xml:space="preserve"/>
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          <figure number="146">
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          <head xml:id="echoid-head122" xml:space="preserve">TAVOLA DE I DRITTI
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          ASCENDIMENTI.</head>
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