Harriot, Thomas, Mss. 6789

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          <pb file="0061.jpg" o="31r" n="61"/>
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              <s xml:space="preserve">[
                <emph style="bf">Commentary:</emph>
              </s>
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            <p>
              <s xml:space="preserve"> The page is part of Harriot’s
                <ref target="http://echo.mpiwg-berlin.mpg.de/content/scientific_revolution/harriot/harriot-bl/maps/8.1.1_Compound.pt">introduction of compound diagrams of motion</ref>
              , a group of folios on which Harriot eventually succeeds in deriving, by means of such diagrams, a general expression for the time of flight of a projectile
                <ref id="Schemmel_2008">(Schemmel 2008, Section 8.2)</ref>
              . </s>
              <s xml:space="preserve">]</s>
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            <p>
              <s xml:space="preserve"> Algebraic expressions are derived for the final degree of velocity of a downward motion (or, equally, for the first degree of an upward motion) along an inclined plane of equal length to a given vertical line, assuming the final degree of velocity of the motion of fall along the vertical and the inclination of the plane are given
                <ref id="Schemmel_2008">(Schemmel 2008, 307-8)</ref>
              . </s>
              <s xml:space="preserve">]</s>
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          <head xml:space="preserve"> The velocity of a diagonall oblique supposed
            <lb/>
          aequall to the upright. </head>
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