Harriot, Thomas, Mss. 6789

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              <s xml:space="preserve">[
                <emph style="bf">Commentary:</emph>
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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>
              . A few preliminary calculations concerning the glass prism in these color experiments. In particular, Harriot calculates
                <math>
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              , the distance between the apex of the prism
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              and the point
                <math>
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              that the eye observes on the prism, as a proportion of the distance between the prism and the card,
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              . As the measurements on f. 190 record,
                <math>
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              inches, and
                <math>
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              feet. If the latter is taken as 10000000, then
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                    <mn>8</mn>
                    <mn>4</mn>
                    <mn>8</mn>
                    <mn>7</mn>
                    <mn>6</mn>
                    <mo>.</mo>
                    <mn>5</mn>
                    <mn>4</mn>
                    <mn>3</mn>
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              . </s>
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          <head xml:space="preserve" xml:lang="lat"> C. De coloribus per prisma vitreum.
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          [
            <emph style="bf">Translation: </emph>
          On colours through a glass prism. ] </head>
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Impressum