Benedetti, Giovanni Battista de, Io. Baptistae Benedicti ... Diversarvm specvlationvm mathematicarum, et physicarum liber : quarum seriem sequens pagina indicabit ; [annotated and critiqued by Guidobaldo Del Monte]

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page |< < (131) of 445 > >|
DE PERSPECT.
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          <div xml:id="echoid-div308" type="chapter" level="2" n="2">
            <div xml:id="echoid-div326" type="section" level="3" n="10">
              <p>
                <s xml:id="echoid-s1590" xml:space="preserve">
                  <pb o="131" rhead="DE PERSPECT." n="143" file="0143" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/163127KK/pageimg/0143"/>
                inter
                  <var>.o.i.</var>
                et
                  <var>.p.E.</var>
                intercedebat, altitudinem oculi ab orizonte ſignificabat. </s>
                <s xml:id="echoid-s1591" xml:space="preserve">Signa-
                  <lb/>
                ui etiam lineam
                  <var>.i.G.</var>
                perpendicularem lineæ
                  <var>.E.p.</var>
                cui affigi poſſet non nihil chartæ
                  <lb/>
                quotieſcunque volebam in perſpectiua aliquid delineare. </s>
                <s xml:id="echoid-s1592" xml:space="preserve">Quod cum facere deſi-
                  <lb/>
                derabam, ponebam perfectum optimè affixum in quadrangulo
                  <var>.E.G</var>
                : & in quadran
                  <lb/>
                gulo
                  <var>.E.i.</var>
                aliquod folium papyri affigebam. </s>
                <s xml:id="echoid-s1593" xml:space="preserve">Ponamus nunc, me voluiſſe conſtitaere
                  <lb/>
                  <reg norm="punctum" type="context">punctũ</reg>
                  <var>.b.</var>
                  <reg norm="ſumebam" type="context">ſumebã</reg>
                  <reg norm="angulum" type="context">angulũ</reg>
                  <reg norm="rectum" type="context">rectũ</reg>
                  <reg norm="materialem" type="context">materialẽ</reg>
                , ſeu
                  <reg norm="normam" type="context">normã</reg>
                , & eius vnum latus, iuxta latus
                  <var>.
                    <lb/>
                  B.c.</var>
                ponebam, atque aliud per punctum
                  <var>.b.</var>
                tranſire faciebam, & vbi hoc latus
                  <reg norm="lineam" type="context">lineã</reg>
                  <lb/>
                  <var>E.p.</var>
                diuidebat, punctum .c ſignabam per quod efficiebatur, vt regula
                  <var>.i.M.</var>
                tranſiret,
                  <lb/>
                quieſceretq́ue aliquantulum aliquo modo in huiuſmodi ſitu, opera deinde circini
                  <lb/>
                interuallum
                  <var>.b.c.</var>
                ſumebam, & in
                  <var>.p.E.</var>
                à puncto
                  <var>.x.</var>
                verſus
                  <var>.E.</var>
                punctum
                  <var>.m.</var>
                  <reg norm="ſignabam" type="context">ſignabã</reg>
                : </s>
                <s xml:id="echoid-s1594" xml:space="preserve">per
                  <lb/>
                quod faciebam, vt tranſiret regula
                  <var>.o.Q.</var>
                quæ lineam
                  <var>.x.i.</var>
                in puncto
                  <var>.f.</var>
                diuidebat.
                  <lb/>
                </s>
                <s xml:id="echoid-s1595" xml:space="preserve">Angulum deinderectum materialem accipiebam, cuius vnum latus
                  <var>.A.B.</var>
                ponebam,
                  <lb/>
                aliud verò per punctum
                  <var>.f.</var>
                tranſibat, quod quidem latus regulam
                  <var>.i.M.</var>
                in puncto
                  <var>.k.</var>
                  <lb/>
                (quod ſtatim ſuper folio papyri ſignabatur) interſecabat, atque hoc erat
                  <reg norm="punctum" type="context">punctũ</reg>
                ,
                  <lb/>
                quod quærebam, puncto
                  <var>.b.</var>
                correſpondens. </s>
                <s xml:id="echoid-s1596" xml:space="preserve">Huiuſmodi effectus rationes ab ijs, quæ
                  <lb/>
                ſuperius dixi eliciuntur. </s>
                <s xml:id="echoid-s1597" xml:space="preserve">Atque hæc ad baſes rerum, vt in ſubſcripta figura eluceſcit,
                  <lb/>
                ſpectabant.</s>
              </p>
              <figure position="here">
                <image file="0143-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/163127KK/figures/0143-01"/>
              </figure>
            </div>
            <div xml:id="echoid-div327" type="section" level="3" n="11">
              <head xml:id="echoid-head187" xml:space="preserve">CAP. XI.</head>
              <p>
                <s xml:id="echoid-s1598" xml:space="preserve">
                  <emph style="sc">Ad</emph>
                degradandas deinde altitudines, vſus ſum mea figura tam
                  <var>.H.</var>
                  <reg norm="quam" type="context">quã</reg>
                  <reg norm="ent" type="context">ẽt</reg>
                  <var>.H.H.</var>
                  <lb/>
                vt milii ſeſe offerebat occaſio. </s>
                <s xml:id="echoid-s1599" xml:space="preserve">In primis ratione modi figuræ
                  <var>.H.</var>
                  <reg norm="curabam" type="context">curabã</reg>
                , vt </s>
              </p>
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