Vitruvius, M. Vitrvvivs Per Iocvndvm Solito Castigatior Factvs Cvm Figvris Et Tabvla Vt Iam Legi Et Intelligi Possit, 1511
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            <s xml:id="echoid-s1659" xml:space="preserve">
              <pb file="0068" n="68" rhead="LIBER"/>
            craſſitudini relinquatur, & </s>
            <s xml:id="echoid-s1660" xml:space="preserve">ex reliquis octo volutæ conſtituãtur, Tunc
              <lb/>
            ab linea quæ ſecundum abaci extremam partem demiſſa erit, in interio-
              <lb/>
            rem partẽ alia recedat vnius & </s>
            <s xml:id="echoid-s1661" xml:space="preserve">dimidiatæ partis latitudine, Deinde eæ li-
              <lb/>
            neæ diuidantur ita, ut quatuor partes & </s>
            <s xml:id="echoid-s1662" xml:space="preserve">dimidia ſub abaco relinquan-
              <lb/>
            tur, Tunc in eo loco qui locus diuidit quatuor & </s>
            <s xml:id="echoid-s1663" xml:space="preserve">dimidiam & </s>
            <s xml:id="echoid-s1664" xml:space="preserve">tres & </s>
            <s xml:id="echoid-s1665" xml:space="preserve">
              <lb/>
            dimidiam partem, centrum oculi ſignetur, ducatur ex eo centro ro-
              <lb/>
            tunda circinatio tam magna in diametro, ꝗ̃
              <unsure/>
            vna pars ex octo partibus
              <lb/>
            eſt, ea erit oculi magnitudine, & </s>
            <s xml:id="echoid-s1666" xml:space="preserve">in ea catheto reſpõdens diametros aga-
              <lb/>
            tur, Tunc ab ſummo ſub abaco inceptum in ſingulis tetrantorum actio
              <lb/>
            nibus dimidiatum oculi ſpatium minuatur, donicum in eũdem tetran-
              <lb/>
            tem, qui eſt ſub abaco, veniat, Capituli autem craſſitudo ſic eſt facienda,
              <lb/>
            vt ex nouem partibus & </s>
            <s xml:id="echoid-s1667" xml:space="preserve">dimidia tres partes præpendeant infra aſtraga-
              <lb/>
            lum ſummi ſcapi. </s>
            <s xml:id="echoid-s1668" xml:space="preserve">Cymatio adempto abaco & </s>
            <s xml:id="echoid-s1669" xml:space="preserve">cannali reliqua ſit pars,
              <lb/>
            Proiectura autem cymatii habeat extra abaci quadram oculi magnitu-
              <lb/>
            dinem, Puluinorum balthei ab abaco hanc habeãt proiecturam, vti cir-
              <lb/>
            cini centrum vnum cum ſit poſitum in capituli tetrante, & </s>
            <s xml:id="echoid-s1670" xml:space="preserve">alterum di-
              <lb/>
            ducatur ad extremum cymatium, circumactum baltheorum extremas
              <lb/>
            partes tangat, Axes volutarum ne craſſiores ſint, ꝗ̃
              <unsure/>
            oculi magnitudo, vo
              <lb/>
            I
              <unsure/>
            utæ ipſæ ſic cedantur, vti altitudinis habeant latitudinis ſuæ duodeci
              <lb/>
            mam partem.</s>
            <s xml:id="echoid-s1671" xml:space="preserve"/>
          </p>
          <figure number="40">
            <description xml:id="echoid-description23" xml:space="preserve">a. cymatiũ
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            b. abacus
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            c. uoluta</description>
            <variables xml:id="echoid-variables22" xml:space="preserve">a b c</variables>
          </figure>
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