Vitruvius, M. Vitruvii ... de architectura libri decem, ad Augustum Caesarem accuratiß conscripti: & nunc primum in Germania qua potuit diligentia excusi, atq[ue] hinc inde schematibus non iniucundis exornati

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              <pb o="221" file="0275" n="275" rhead="DE ARCHITEC. LIB. IX."/>
            Solæquinoctiali tẽpore Ariete Libra{qúe} uerſando, quas ex gnomone par
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            tes habet nouẽ, eas umbræ facit octo in declinatione cœli quæ est Romæ.
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            </s>
            <s xml:id="echoid-s4572" xml:space="preserve">Item{qúe} Athenis quãmagnæ ſunt gnomonis partes quatuor, umbræ ſunt
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            tres. </s>
            <s xml:id="echoid-s4573" xml:space="preserve">Ad ſeptem Rhodo quing;</s>
            <s xml:id="echoid-s4574" xml:space="preserve">. At Tarentinouem adundecim. </s>
            <s xml:id="echoid-s4575" xml:space="preserve">Alexan-
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            driætres ad quin. </s>
            <s xml:id="echoid-s4576" xml:space="preserve">Cæteris{qúe} omnibus locis aliæ alio modo umbræ gno-
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            monum æ quinoctiales ab natura rerum inueniuntur diſparatæ.</s>
            <s xml:id="echoid-s4577" xml:space="preserve"/>
          </p>
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            <s xml:id="echoid-s4578" xml:space="preserve">Ita in quibuſcun locis horologia erunt deſcribenda, eo loci ſumen
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            da est æquinoctialis umbra: </s>
            <s xml:id="echoid-s4579" xml:space="preserve">et ſierunt (quemadmodum Romæ) gnomo-
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            nis partes nouẽ, umbræ octonæ. </s>
            <s xml:id="echoid-s4580" xml:space="preserve">Deſcribatur linea in planitia, & </s>
            <s xml:id="echoid-s4581" xml:space="preserve">ex me-
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            dia πρὸς ὀρθ@@ erigatur, uti ſit ad normam quæ dicitur gnomon, & </s>
            <s xml:id="echoid-s4582" xml:space="preserve">à
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            linea, quæ erit planities, in finem gnomonis circino nouem ſpatia dimetià-
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            tur, & </s>
            <s xml:id="echoid-s4583" xml:space="preserve">quo loco nonæ partis ſignum fuerit, centrum cõſtituatur, ubierit
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            litera A, & </s>
            <s xml:id="echoid-s4584" xml:space="preserve">diducto circino ab eo centro ad lineam planitiæ, ubi erit lite
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            ra B, circinatio circuli deſcribatur, quæ dicitur, meridiana. </s>
            <s xml:id="echoid-s4585" xml:space="preserve">Deinde ex
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            nouem partibus, quæ ſunt à planitia ad gnomonis centrum, octo ſuman-
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            tur, & </s>
            <s xml:id="echoid-s4586" xml:space="preserve">ſignentur in linea, quæ est in planitia, ubierit litera C. </s>
            <s xml:id="echoid-s4587" xml:space="preserve">Hæc autẽ
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            erit gnomonis æquinoctialis umbra: </s>
            <s xml:id="echoid-s4588" xml:space="preserve">& </s>
            <s xml:id="echoid-s4589" xml:space="preserve">ab eo ſigno & </s>
            <s xml:id="echoid-s4590" xml:space="preserve">litera C, per cen-
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            trum ubi est litera A, linea perducatur, ubierit Solis æquinoctialis radi-
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            us. </s>
            <s xml:id="echoid-s4591" xml:space="preserve">Tunc ab centro diducto circino ad lineam planitiæ æquilatatio ſigne-
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            tur, ubierit litera E ſiniſteriore parte, & </s>
            <s xml:id="echoid-s4592" xml:space="preserve">I dexteriore in extremis line-
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            is circinationis, & </s>
            <s xml:id="echoid-s4593" xml:space="preserve">per centrum perducẽda linea, ut æque duo hemicyclia
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            ſint diuiſa. </s>
            <s xml:id="echoid-s4594" xml:space="preserve">Hæc autem linea à mathematicis dicitur Orizon. </s>
            <s xml:id="echoid-s4595" xml:space="preserve">Deinde cir
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            cinationis totius ſumenda pars est quintadecima, & </s>
            <s xml:id="echoid-s4596" xml:space="preserve">circini centrum col-
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            locandum in linea circinationis, quo lociſecat eam lineam æquinoctialis
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            radius, ubierit litera F, & </s>
            <s xml:id="echoid-s4597" xml:space="preserve">ſignandum dextra ac ſiniſtraubiſunt literæ
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            G H. </s>
            <s xml:id="echoid-s4598" xml:space="preserve">Dcinde ab his & </s>
            <s xml:id="echoid-s4599" xml:space="preserve">per centrum, lineæ, uſ ad lineam planitiæ perdu
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            cendæ ſunt, ubi erunt literæ T R, itaerit Solis radius, unus hybernus, al-
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            ter æſtiuus. </s>
            <s xml:id="echoid-s4600" xml:space="preserve">Contra autem E, litera I erit, ubi ſecat circinationem linea
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            quæ est traiect a per centrum, & </s>
            <s xml:id="echoid-s4601" xml:space="preserve">contra G & </s>
            <s xml:id="echoid-s4602" xml:space="preserve">H, literæ erunt K & </s>
            <s xml:id="echoid-s4603" xml:space="preserve">L,
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            & </s>
            <s xml:id="echoid-s4604" xml:space="preserve">contra C & </s>
            <s xml:id="echoid-s4605" xml:space="preserve">F & </s>
            <s xml:id="echoid-s4606" xml:space="preserve">A, erit litera N. </s>
            <s xml:id="echoid-s4607" xml:space="preserve">Tunc perducendæ ſunt diame-
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            triab G ad L, & </s>
            <s xml:id="echoid-s4608" xml:space="preserve">ab H ad K. </s>
            <s xml:id="echoid-s4609" xml:space="preserve">Quod erit inferior, partis erit æſtiuæ,
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            ſuperior hybernæ. </s>
            <s xml:id="echoid-s4610" xml:space="preserve">Quæ diametri ſunt æque mediæ diuidendæ, ubierunt
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            literæ M & </s>
            <s xml:id="echoid-s4611" xml:space="preserve">O, ibi{qúe} centra ſignanda, & </s>
            <s xml:id="echoid-s4612" xml:space="preserve">per ea ſigna & </s>
            <s xml:id="echoid-s4613" xml:space="preserve">centrum A,
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            linea ad extremas lineas circinationis est perducenda, ubierunt literæ </s>
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