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"> 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>
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              <s xml:space="preserve"> The problem of finding the time of flight of a projectile formulated on the upper part of
                <ref target="http://echo.mpiwg-berlin.mpg.de/ECHOdocuView?url=/permanent/library/0VGM2B80/&start=50&viewMode=image&pn=51">f. 26</ref>
              is adequately reformulated in terms of a compound diagram of motion. The result is noted as an equation as well as a proportion. </s>
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          <head xml:space="preserve"> 5.) For oblique motions. </head>
          <p>
            <s xml:space="preserve"> Data. ∆.
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            .
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            ∆.
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            .
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            .
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            .
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            . </s>
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          <p>
            <s xml:space="preserve"> Quaesitum: Ducere lineas
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            , et
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            ita vt
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            et
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            sint aequales
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            et
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            ad
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            sit
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            in ratione, αδ ad δι.
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            hoc est:
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            ad
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            […] </s>
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