Gravesande, Willem Jacob 's, Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1

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        <div xml:id="echoid-div2365" type="section" level="1" n="592">
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            <s xml:id="echoid-s15865" xml:space="preserve">
              <pb o="(104)" file="0620" n="684" rhead="PHYSICES ELEMENTA"/>
            diſponintur charta nigra, ut à lumine per feneſtram cubicu-
              <lb/>
            lum intranti vittæ probè illuminentur: </s>
            <s xml:id="echoid-s15866" xml:space="preserve">ſi ſpectator trans
              <lb/>
            priſma vittas intueatur, ut in exp. </s>
            <s xml:id="echoid-s15867" xml:space="preserve">ſtatim memorato, eodem
              <lb/>
            modo, ac in illo experimento, colores ſeparati apparent.</s>
            <s xml:id="echoid-s15868" xml:space="preserve"/>
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        </div>
        <div xml:id="echoid-div2366" type="section" level="1" n="593">
          <head xml:id="echoid-head775" xml:space="preserve">
            <emph style="sc">Experimentum</emph>
          2.</head>
          <p>
            <s xml:id="echoid-s15869" xml:space="preserve">Dentur in R & </s>
            <s xml:id="echoid-s15870" xml:space="preserve">V vittæ ſericæ in Experimento præceden-
              <lb/>
              <note position="left" xlink:label="note-0620-01" xlink:href="note-0620-01a" xml:space="preserve">TAB. XIX.
                <lb/>
              fig. 2.</note>
            ti memoratæ hæc violacea, illa rubra eſt; </s>
            <s xml:id="echoid-s15871" xml:space="preserve">flammâ candelæ
              <lb/>
            illuminentur; </s>
            <s xml:id="echoid-s15872" xml:space="preserve">ad ſex pedum diſtantiam detur lens convexa
              <lb/>
            V, de qua in Exp. </s>
            <s xml:id="echoid-s15873" xml:space="preserve">6. </s>
            <s xml:id="echoid-s15874" xml:space="preserve">cap. </s>
            <s xml:id="echoid-s15875" xml:space="preserve">19; </s>
            <s xml:id="echoid-s15876" xml:space="preserve">ad diſtantiam circiter ſex
              <lb/>
            pedum, in chartâ albâ dabitur in r repræſentatio vittæ R,
              <lb/>
            ad minorem diſtantiam in v aliûs repræſentationem exactam
              <lb/>
            habemus. </s>
            <s xml:id="echoid-s15877" xml:space="preserve">Determinatur ubi repræſentationes ſunt exactæ,
              <lb/>
            ſi fila nigra trajiciant ſuperficiem vittarum, nam hæc fila di-
              <lb/>
            ſtincta apparent in exactâ repræſentatione.</s>
            <s xml:id="echoid-s15878" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s15879" xml:space="preserve">Corporum colores varios dari, quia radii diverſi à corpori-
              <lb/>
              <note position="left" xlink:label="note-0620-02" xlink:href="note-0620-02a" xml:space="preserve">907.</note>
            bus diverſê coloratis reflectuntur, & </s>
            <s xml:id="echoid-s15880" xml:space="preserve">corpus illius coloris ap-
              <lb/>
            parere, qui oritur ex permixtione radiorum reflexorum,
              <lb/>
            non modo ex præcedentibus experimentis deducitur, ſed
              <lb/>
            etiam directis demonſtratur.</s>
            <s xml:id="echoid-s15881" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div2369" type="section" level="1" n="594">
          <head xml:id="echoid-head776" xml:space="preserve">
            <emph style="sc">Experimentum</emph>
          3.</head>
          <p>
            <s xml:id="echoid-s15882" xml:space="preserve">Dentur duo corpora quæcunque unum rubrum, alterum
              <lb/>
            cœruleum, illuminentur hæc ſucceſſivè, in loco obſcuro,
              <lb/>
            coloribus imaginis coloratæ, refractione priſmatis formatæ,
              <lb/>
            ſinguli colores ab ambobus quidem reflectuntur, ſed radii
              <lb/>
            rubri magnâ copia à corpore rubro repercutiuntur, dum pau-
              <lb/>
            cos ex his reflectit corpus cœruleum, ut ex collatione coloris
              <lb/>
            rubri amborum corporum clarè patet; </s>
            <s xml:id="echoid-s15883" xml:space="preserve">contrarium obſer-
              <lb/>
            vatur in radiis cœruleis, qui à corpore cœruleo magnâ co-
              <lb/>
            piâ reflectuntur, dum à corpore rubro pauci tantum, re-
              <lb/>
            flectione redeunt.</s>
            <s xml:id="echoid-s15884" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s15885" xml:space="preserve">Radii, qui à corpore non reflectuntur, in hoc penetrant, ibi-
              <lb/>
            que innumeras reflectiones & </s>
            <s xml:id="echoid-s15886" xml:space="preserve">refractiones patiuntur, ut inter
              <lb/>
            num. </s>
            <s xml:id="echoid-s15887" xml:space="preserve">842. </s>
            <s xml:id="echoid-s15888" xml:space="preserve">& </s>
            <s xml:id="echoid-s15889" xml:space="preserve">843. </s>
            <s xml:id="echoid-s15890" xml:space="preserve">explicavimus; </s>
            <s xml:id="echoid-s15891" xml:space="preserve">donec tandem ſeſe jungant
              <lb/>
              <note symbol="*" position="left" xlink:label="note-0620-03" xlink:href="note-0620-03a" xml:space="preserve">546.</note>
            particulis ipſius corporis . </s>
            <s xml:id="echoid-s15892" xml:space="preserve">Idèo corpus eo citius
              <note position="left" xlink:label="note-0620-04" xlink:href="note-0620-04a" xml:space="preserve">908.</note>
            quo minori copiâ reflectit lumen. </s>
            <s xml:id="echoid-s15893" xml:space="preserve">Idcirco corpus album,
              <lb/>
              <note position="left" xlink:label="note-0620-05" xlink:href="note-0620-05a" xml:space="preserve">909.</note>
            quod ferè omnes radios quibus illuſtratur reflectit ,
              <note symbol="*" position="left" xlink:label="note-0620-06" xlink:href="note-0620-06a" xml:space="preserve">870.</note>
            lentiſſimè incaleſcit, dum corpus nigrum, in quod ferè </s>
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