Clavius, Christoph, Geometria practica

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          <pb o="51" file="081" n="81"/>
          <figure number="17">
            <image file="081-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/081-01"/>
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        <div xml:id="echoid-div98" type="section" level="1" n="44">
          <head xml:id="echoid-head47" xml:space="preserve">GEOMETRIÆ
            <lb/>
          PRACTICÆ
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          LIBER SECVNDVS.</head>
          <p>
            <s xml:id="echoid-s2093" xml:space="preserve">Linearum rectarum per Quadrantem Aſtrono-
              <lb/>
            micum Dimenſionem explicans.</s>
            <s xml:id="echoid-s2094" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s2095" xml:space="preserve">NOMINE linearum rectarum intelligim{us} diſtanti{as} loc@-
              <lb/>
            rum, ſeu interualla, longitudineſue: </s>
            <s xml:id="echoid-s2096" xml:space="preserve">altitudines turrium,
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            ædificio
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            rum, arborum, & </s>
            <s xml:id="echoid-s2097" xml:space="preserve">montium: </s>
            <s xml:id="echoid-s2098" xml:space="preserve">ac poſtremo profun-
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            ditates puteorum, vallium, atque foſſarum. </s>
            <s xml:id="echoid-s2099" xml:space="preserve">Ad harum Di-
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            menſiones varii varia adhibent inſtrumenta; </s>
            <s xml:id="echoid-s2100" xml:space="preserve">quibuſdam
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            enim placet ſcala altimetra in dorſo Aſtrolabii, ſeu plani-
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            ſphærii deſcripta. </s>
            <s xml:id="echoid-s2101" xml:space="preserve">Aliis radi{us} Aſtronomic{us} Gemmæ Friſii, vel radi{us} dict{us}
              <lb/>
            Latin{us}, qu@d à Domino Latino Vrſino nobili Romano excogitat{us} ſit; </s>
            <s xml:id="echoid-s2102" xml:space="preserve">vel
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            bacul{us} Iacob: </s>
            <s xml:id="echoid-s2103" xml:space="preserve">Aliis annul{us} Aſtronomic{us}, vel Holometrum; </s>
            <s xml:id="echoid-s2104" xml:space="preserve">Aliis deniq{ue}
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            alia inſtrumenta arrident. </s>
            <s xml:id="echoid-s2105" xml:space="preserve">Mihi vero præ cæteris probatur Quadrans Aſtro-
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            nomic{us} in 90. </s>
            <s xml:id="echoid-s2106" xml:space="preserve">grad{us} diſtribut{us}: </s>
            <s xml:id="echoid-s2107" xml:space="preserve">& </s>
            <s xml:id="echoid-s2108" xml:space="preserve">Quadratum Geometricum tum ſtabile,
              <lb/>
            tum pendulum, cui{us} duo latera in cert{as} quaſdam partes æquales ſint diuiſa.
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            </s>
            <s xml:id="echoid-s2109" xml:space="preserve">Hoc autem 2. </s>
            <s xml:id="echoid-s2110" xml:space="preserve">lib. </s>
            <s xml:id="echoid-s2111" xml:space="preserve">qua ratione per Quadrantem Aſtronomicum Dimenſio
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            linearum rectarum perficiatur, docebim{us}. </s>
            <s xml:id="echoid-s2112" xml:space="preserve">Quæ ratio vt intelligatur, in
              <lb/>
            promptu, & </s>
            <s xml:id="echoid-s2113" xml:space="preserve">ad manum eſſe debent tabulæ ſinuum, Tangentium, atque ſecan-
              <lb/>
            tium in noſtro Theodoſio, & </s>
            <s xml:id="echoid-s2114" xml:space="preserve">in aliorum auctorum libris deſcripræ, vnde peten-
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            dæ erunt. </s>
            <s xml:id="echoid-s2115" xml:space="preserve">Superuacaneum enim eſſe duxim{us}, eaſdem hic repetere, ne op{us} in
              <lb/>
            maiorem formam excreſcat.</s>
            <s xml:id="echoid-s2116" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2117" xml:space="preserve">DISTANTIAM in plano, ſiue acceſſibilis ea ſit, ſiue inacceſſibilis
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            per duas ſtationes in eodem plano factas per Quadrantem metiri,
              <lb/>
            quando in eius extremo erecta eſt altitudo aliqua perpendicularis,
              <lb/>
            etiamſi infimum eius extremum non cernatur. </s>
            <s xml:id="echoid-s2118" xml:space="preserve">Atque hinc altitudi-
              <lb/>
            nem quoque ipſam elicere.</s>
            <s xml:id="echoid-s2119" xml:space="preserve"/>
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