Gravesande, Willem Jacob 's, An essay on perspective

Table of handwritten notes

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            <caption xml:id="echoid-caption67" style="it" xml:space="preserve">page 100
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            Plate. 29
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            Fig. 67</caption>
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            <variables xml:id="echoid-variables67" xml:space="preserve">c P G e o Q</variables>
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          <figure number="70">
            <caption xml:id="echoid-caption69" style="it" xml:space="preserve">Fig. 69</caption>
            <variables xml:id="echoid-variables68" xml:space="preserve">P c G o e Q</variables>
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