Harriot, Thomas, Mss. 6789

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              <s xml:space="preserve">[
                <emph style="bf">Commentary:</emph>
              </s>
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            <p>
              <s xml:space="preserve"> This page is part of Harriot's
                <ref target="http://echo.mpiwg-berlin.mpg.de/content/scientific_revolution/harriot/maps/9.2.3_colour.pt"> experiments on refractive colours</ref>
              . As Harriot wrote on
                <ref target="http://echo.mpiwg-berlin.mpg.de/ECHOdocuView?url=%2Fmpiwg%2Fonline%2Fpermanent%2Flibrary%2F0VGM2B80&start=381&viewMode=image&pn=379"> f. 190</ref>
              , the 58° glass prism he used for his first experiments was irregularly shaped, and the observations were 'not to be trusted'. Most likely this is the reason that he recalculated, over two pages, the colour-producing cardinals for a regularly-shaped, 60° glass prism, using the same method as in the earlier pages on prismatic colours. </s>
              <s xml:space="preserve">]</s>
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          <head xml:space="preserve" xml:lang="lat"> A2. De coloribus per angulum vitreum
            <lb/>
          [
            <emph style="bf">Translation: </emph>
          On colours through a 60° glass prism ]</head>
          <p xml:lang="lat">
            <s xml:space="preserve"> Numeratio per primarios cardinales.
              <lb/>
            Numeratio per cardinales
              <lb/>
            [
              <emph style="bf">Translation: </emph>
            Calculation for primary cardinals.
              <lb/>
            Calculation for secondary cardinals. ]</s>
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