Gravesande, Willem Jacob 's, An essay on perspective

Table of Notes

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page |< < (vi) of 237 > >|
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              <pb o="vi" file="0014" n="14" rhead="The PREFACE."/>
            ing purſued at first, tho’ it requires a little more
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            Application, does afterwards ſave a great
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            many Hours Study, in an Art that always
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            appears difficult enough.</s>
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          </p>
          <p style="it">
            <s xml:id="echoid-s102" xml:space="preserve">A Painter, in a ſhort Time, may learn this
              <lb/>
            Work, and make the Rules thereof familiar to
              <lb/>
            him: </s>
            <s xml:id="echoid-s103" xml:space="preserve">And if this Study be repeated from
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            time to time, for a few Days, he will find
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            the Benefit thereof, in diminiſhing his Labour
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            and Trouble.</s>
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          </p>
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            <s xml:id="echoid-s105" xml:space="preserve">But, that any one himſelf may ſee what
              <lb/>
            I promiſe in this Eſſay; </s>
            <s xml:id="echoid-s106" xml:space="preserve">take the following
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            ſhort Abſtract thereof. </s>
            <s xml:id="echoid-s107" xml:space="preserve">It is divided into
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            Nine Chapters: </s>
            <s xml:id="echoid-s108" xml:space="preserve">The Firſt, being as an In-
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            troduction to the reſt, ſhews the Uſefulneſs
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            of Perſpective, and gives you the Definiti-
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            ons of the Terms neceſſary for underſtanding
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            this Treatiſe.</s>
            <s xml:id="echoid-s109" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s110" xml:space="preserve">The whole Theory is contain’d in the Se-
              <lb/>
            cond Chapter: </s>
            <s xml:id="echoid-s111" xml:space="preserve">Where, what has been found
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            moſt uſeful in that Matter, is therein re-
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            duced to Three general Theorems; </s>
            <s xml:id="echoid-s112" xml:space="preserve">viz. </s>
            <s xml:id="echoid-s113" xml:space="preserve">the
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            firſt, ſecond, and fourth: </s>
            <s xml:id="echoid-s114" xml:space="preserve">All the reſt is de-
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            duced from them, by way of Corollary. </s>
            <s xml:id="echoid-s115" xml:space="preserve">To
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            theſe Theorems, already known, are added
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            ſome new ones, ſerving for the Demonſtra-
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            tion of ſome neceſſary Propoſitions. </s>
            <s xml:id="echoid-s116" xml:space="preserve">Perhaps
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            it might be wiſh’d, that I had ſhewn the Way
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            that led me to the Truths which I diſcover:</s>
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