Casati, Paolo, Terra machinis mota : dissertationes geometricae, mechanicae physicae hydrostaticae

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        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="018/01/098.jpg" pagenum="84"/>
              autem opticus DB terram tangens facit cum
                <lb/>
              ſemidiametro angulum DBC rectum. </s>
              <s>Igi­
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              tur recta AB ab angulo recto ad B cadens iņ
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              baſim perpendicularis, eſt medio loco pro­
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              portionalis inter ſegmenta DA & AC. </s>
              <s>Qua­
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              rè diuiſo quadrato maximæ visûs diſtantiæ
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              AB per altitudinem AD, prouenit quæſitą
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              terræ ſemidiameter AC. </s>
              <s>Verùm arcum
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              pro rectâ lineâ aſſumere parùm Geometri­
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              cum eſt. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="note40"/>
                <emph type="italics"/>
              XXXX
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              Abuſus li­
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              neæ curuæ
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              pro rectą,
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              inutilis.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>
                <emph type="italics"/>
              Merſ.
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              </s>
              <s> Ideò paruipendendendam cenſui
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              methodum, quæ mihi aliquando occurrit
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                <arrow.to.target n="note41"/>
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              per circulos Azimuthales; ſi nimirùm duo­
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              rum locorum, quorum alteruter ex alterius
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              editâ turri conſpici queat, nota fuerit diſtan­
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              tia, & poli altitudo. </s>
              <s>In ſummâ enim turri
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              planum horizontale conſtituatur, in eoque
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              meridiana linea deſcribatur: tum obſeruetur
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              ſub quo Azimutho locus alter conſpicuus
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              appareat: & ex his datis quæſita eruantur. </s>
              <s>
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              Sit PAC loci Meridianus, vbi obſeruatio in­
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              ſtituitur
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              ; Verticalis per vtrumque locum
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              tranſiens AB, cum Meridiano faciat angu­
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              lum CAB obſeruatum; P verò ſit Polus, &
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              AP, BP ſint complementa nota datarum
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              poli eleuationum. </s>
              <s>Cum itaque in triangu­
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              lo ſphærico BAP nota ſint duo latera AP,
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              BP, & angulus BAP complementum angu­</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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