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

Table of Notes

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            do colores ſequentes ad rubrum uſque. </s>
            <s xml:id="echoid-s15778" xml:space="preserve">Si, poſitis annulis
              <lb/>
            coloris cujuſcunque, diametri exactè menſurentur ci culo-
              <lb/>
            rum, qui in medio latitudinis ſingulorum annulorum conci-
              <lb/>
            piuntur, quadrata diametrorum erunt inter ſe ut numeri im-
              <lb/>
            pares 1. </s>
            <s xml:id="echoid-s15779" xml:space="preserve">3. </s>
            <s xml:id="echoid-s15780" xml:space="preserve">5. </s>
            <s xml:id="echoid-s15781" xml:space="preserve">&</s>
            <s xml:id="echoid-s15782" xml:space="preserve">c. </s>
            <s xml:id="echoid-s15783" xml:space="preserve">& </s>
            <s xml:id="echoid-s15784" xml:space="preserve">eodem modo, menſuratis diametris cir-
              <lb/>
            culorum, in medio ſingulorum interſtitiorum inter annu-
              <lb/>
            los, illarum quadrata erunt, ut numeri pares 2. </s>
            <s xml:id="echoid-s15785" xml:space="preserve">4. </s>
            <s xml:id="echoid-s15786" xml:space="preserve">6. </s>
            <s xml:id="echoid-s15787" xml:space="preserve">&</s>
            <s xml:id="echoid-s15788" xml:space="preserve">c.
              <lb/>
            </s>
            <s xml:id="echoid-s15789" xml:space="preserve">Cùm autem agatur de vitris ſphæricis, craſſities laminæ aëreæ,
              <lb/>
            in circulis memoratis, ſunt ut numeri pares & </s>
            <s xml:id="echoid-s15790" xml:space="preserve">impares.</s>
            <s xml:id="echoid-s15791" xml:space="preserve"/>
          </p>
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        <div xml:id="echoid-div2354" type="section" level="1" n="590">
          <head xml:id="echoid-head772" xml:space="preserve">
            <emph style="sc">Definitio</emph>
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          <p>
            <s xml:id="echoid-s15792" xml:space="preserve">Color homogencus, in laminâ medii cujuſcunque, dicitur
              <lb/>
              <note position="left" xlink:label="note-0618-01" xlink:href="note-0618-01a" xml:space="preserve">897.</note>
            primi ordinis, ſi lamina fuerit omnium tenuiſſima, quæ talem
              <lb/>
            colorem reflectit; </s>
            <s xml:id="echoid-s15793" xml:space="preserve">in laminâ, cujus craſſities tripla eſt, dici-
              <lb/>
            tur ſecundi ordinis, &</s>
            <s xml:id="echoid-s15794" xml:space="preserve">c.</s>
            <s xml:id="echoid-s15795" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s15796" xml:space="preserve">Color primi ordinis eſt omnium maximè vividus; </s>
            <s xml:id="echoid-s15797" xml:space="preserve">& </s>
            <s xml:id="echoid-s15798" xml:space="preserve">ſucceſ-
              <lb/>
              <note position="left" xlink:label="note-0618-02" xlink:href="note-0618-02a" xml:space="preserve">898.</note>
            ſivè, in ordinibus ſequentibus, ſecundo, tertio, &</s>
            <s xml:id="echoid-s15799" xml:space="preserve">c, minus
              <lb/>
            ac minus vividus eſt .</s>
            <s xml:id="echoid-s15800" xml:space="preserve">
              <note symbol="*" position="left" xlink:label="note-0618-03" xlink:href="note-0618-03a" xml:space="preserve">893.</note>
            </s>
          </p>
          <p>
            <s xml:id="echoid-s15801" xml:space="preserve">Quando radiis hæterogeneis illuſtratur lamina aërea, inter
              <lb/>
            vitra Teleſcopiorum, aut lamina ſimilis ex aliâ quacunque
              <lb/>
            materiá, ut in Exp. </s>
            <s xml:id="echoid-s15802" xml:space="preserve">1. </s>
            <s xml:id="echoid-s15803" xml:space="preserve">& </s>
            <s xml:id="echoid-s15804" xml:space="preserve">2. </s>
            <s xml:id="echoid-s15805" xml:space="preserve">varii ex annulis, in ultimo ex-
              <lb/>
            perimento viſis, inter ſe confunduntur, & </s>
            <s xml:id="echoid-s15806" xml:space="preserve">color videtur,
              <lb/>
            qui ex horum permixtione conflatur; </s>
            <s xml:id="echoid-s15807" xml:space="preserve">nam eadem laminæ
              <lb/>
              <note position="left" xlink:label="note-0618-04" xlink:href="note-0618-04a" xml:space="preserve">899.</note>
            craſſities, ad colores diverſos, variorum or dinum, reflecten-
              <lb/>
            dos, ſæpè requiritur: </s>
            <s xml:id="echoid-s15808" xml:space="preserve">ſic lamina, quæ violaceum tertii ordi-
              <lb/>
            nis reflectit, etiam repercutit rubrum ſecundi ordinis, ut,
              <lb/>
            ad hoc attendendo, ex ultimo experimento deducitur: </s>
            <s xml:id="echoid-s15809" xml:space="preserve">ideò-
              <lb/>
            que in Exp. </s>
            <s xml:id="echoid-s15810" xml:space="preserve">1. </s>
            <s xml:id="echoid-s15811" xml:space="preserve">& </s>
            <s xml:id="echoid-s15812" xml:space="preserve">2.</s>
            <s xml:id="echoid-s15813" xml:space="preserve">, violaceus annulus tertius cum parte ex-
              <lb/>
            teriori annuli rubri ſecundi confunditur, & </s>
            <s xml:id="echoid-s15814" xml:space="preserve">color datur pur-
              <lb/>
            pureus; </s>
            <s xml:id="echoid-s15815" xml:space="preserve">non tamen omnis ruber color ſecundi ordinis abſor-
              <lb/>
            betur; </s>
            <s xml:id="echoid-s15816" xml:space="preserve">quia annulus ruber violaceum latitudine ſuperat.</s>
            <s xml:id="echoid-s15817" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s15818" xml:space="preserve">Quo magis augetur laminæ craſſities, eo plures colores re-
              <lb/>
              <note position="left" xlink:label="note-0618-05" xlink:href="note-0618-05a" xml:space="preserve">900.</note>
            flectit, varios, ex diverſis ordinibus. </s>
            <s xml:id="echoid-s15819" xml:space="preserve">Lamina violacea de-
              <lb/>
            cimi ordinis, congruit cum cæruleâ noni ordinis, & </s>
            <s xml:id="echoid-s15820" xml:space="preserve">flavâ
              <lb/>
            octavi ordinis, & </s>
            <s xml:id="echoid-s15821" xml:space="preserve">tandem cum rubrâ ſeptimi ordinis, & </s>
            <s xml:id="echoid-s15822" xml:space="preserve">color
              <lb/>
            laminæ ex permixtione horum colorum conflatur.</s>
            <s xml:id="echoid-s15823" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s15824" xml:space="preserve">Si, in Exp. </s>
            <s xml:id="echoid-s15825" xml:space="preserve">1. </s>
            <s xml:id="echoid-s15826" xml:space="preserve">& </s>
            <s xml:id="echoid-s15827" xml:space="preserve">2.</s>
            <s xml:id="echoid-s15828" xml:space="preserve">, obliquè ſpectator intueatur laminas,
              <lb/>
              <note position="left" xlink:label="note-0618-06" xlink:href="note-0618-06a" xml:space="preserve">901.</note>
            aëream, & </s>
            <s xml:id="echoid-s15829" xml:space="preserve">aqueam, dilantantur annuli cum oculi </s>
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