Vitruvius; Philandrier, Guillaume, Gvlielmi Philandri Castilionii ... In decem libros M. Vitruuii Pollionis de architectura annotationes, 1544
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              <pb o="103" file="0121" n="121" rhead="IN LIB. III."/>
            uidetur, quarum vna pars & </s>
            <s xml:id="echoid-s3590" xml:space="preserve">ſemis, Abaco relinquatur,
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            ex reliquis octo, volutæ constituantur, ſed ita vt in quin-
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            ta, quam magna eſt, ducatur circulus, qui oculus dicitur,
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            eo modo cumerit deſcriptus, ab eius centro ad Abacum
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            imum, erũt partes quatuor & </s>
            <s xml:id="echoid-s3591" xml:space="preserve">dimidia, ab eodem deorſum
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            verſus, partes tres & </s>
            <s xml:id="echoid-s3592" xml:space="preserve">dimidia, Per centrum deinde, per-
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            pendenti lineæ reſpondens linea tranſuerſa agatur. </s>
            <s xml:id="echoid-s3593" xml:space="preserve">Eas
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            lineas vocat Tetrantes, quòd efficiant quatuor lineas pa-
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            ribus interuallis distinctas. </s>
            <s xml:id="echoid-s3594" xml:space="preserve">Collocato igitur pede circini
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            immobili in oculi centro, duc pedem mobilem à Tetrante
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            qui ſab Abaco eſt, in proximum Tetrantem extrinſecũ,
              <lb/>
            prior linea longa erit partes quatuor & </s>
            <s xml:id="echoid-s3595" xml:space="preserve">dimidiam, ſequẽs
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            eritlonga quatuor, à qua agetur linea in tertium Tetran-
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            tem cuius linea non amplius demittitur, quàm ſunt partes
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            tres & </s>
            <s xml:id="echoid-s3596" xml:space="preserve">ſemis, à qua in quartum Tetrantem circũacta li-
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            nea non longior erit quàm ſunt partes tres. </s>
            <s xml:id="echoid-s3597" xml:space="preserve">Rurſus agi-
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            tur linea in primum Tetrantem, vbi ab Abaco imo diſtat
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            partes duas. </s>
            <s xml:id="echoid-s3598" xml:space="preserve">Deinde in ſecundum Tetrantem, vbi à cen-
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            tro oculi distat, partes duas, post in tertium Tetrantem,
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            vbi interuallum est partium vnius & </s>
            <s xml:id="echoid-s3599" xml:space="preserve">ſemis, inde in quar-
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            tum Tetrantem, vbi diſtat à cẽtro partem vnam, poſtre-
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            mo in primum Tetrantem, vbi conuenit cũ oculi circun-
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            currente linea. </s>
            <s xml:id="echoid-s3600" xml:space="preserve">Vides de Tetrante in Tetrantem minui
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            quantum eſt medii oculi ſpacium, idest quanta eſt me-
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            dia pars vnius earũin quas diuiſa eſt perpendens linea.
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            </s>
            <s xml:id="echoid-s3601" xml:space="preserve">Illud autem ſcitu dignum eſſe duximus, in periſtyliis, aut
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            locis eis qui per ambitum parietibus adpactas habent co-
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            lũnas, non eſſe eandem angularium, quæ cæterorum me-
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            dianorum capitulorum rationem, Alioquin, nonnullæ in
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            cauum ædium latus haberent obuerſum, cum omnes, </s>
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