Gravesande, Willem Jacob 's, An essay on perspective

Table of figures

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[41] page 64Plate. 18.d v
[42] Fig. 41E b a G F H C B A D
[43] Fig. 42G Q A M I S E H T B L Z F P a X Y N C D R O
[44] page 68Plate. 19Fig. 43B D E a G H I C F L
[45] Fig. 44O V X S H I T
[46] Fig. 45Q F V X S a H B C D E L M P T A
[47] page 72Plate. 20Fig. 46V I X a E M P A T
[48] Fig. 47V F X a Q G H D N A T R
[49] Page 34.Plate. 21Fig. 48F O D X S b a G N A E T B P C
[50] Fig. 49H F O D G X a M N L R Q
[51] Page 36Plate 22Fig. 50O R E G N S M
[52] Fig. 51I H T a X
[53] Fig. 52C D X I H G a F E L b T
[54] Fig. 53H I F T x d X L B C
[55] page 64.Plate 23.Fig. 54O M P Q t A X x Q R N
[56] Fig. 55G F b T L a
[57] Fig. 56I F a X b E T C P
[58] page 66.Plate. 24.Fig. 57E A Z C P B
[59] Fig. 58F O D I a b
[60] Fig. 59F E Z C A B
[61] page 88.Plate. 25.Fig. 60O G F f Z L R P D I T S M a Q E R H N A C B
[62] Plate 26Fig. 61O I F T N S Q S H E R M A
[63] Fig. 62C D S Q L C D R P H
[64] page 96.Plate. 27Fig. 63D E C F M H I G P A Q N
[65] Fig. 64X S D E T C R L F H I G P M B O V Q N
[66] page 98.Plate. 28Fig. 65L M F G D H C E I A B
[67] Fig. 66A B VII VIII IV V H C VI VI P V VII IV S VIII E O I III II I XII XIX IX F D
[68] page 100Plate. 29Fig. 675 6p 7 8 9 10 S V VI VII VIII IX X o XI ll l
[69] Fig. 68c P G e o Q
[70] Fig. 69P c G o e Q
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            <s xml:id="echoid-s676" xml:space="preserve">
              <pb o="24" file="0048" n="51" rhead="An ESSAY"/>
            thod, unleſs by Means of the Point A, the Ap-
              <lb/>
            pearance of ſome other Point taken at Pleaſure
              <lb/>
            upon the Geometrical Plane be found, by Means
              <lb/>
            of which, the Appearance of the Point B may
              <lb/>
            be afterwards gotten; </s>
            <s xml:id="echoid-s677" xml:space="preserve">but in theſe Caſes, the
              <lb/>
            ſhorteſt Way, is to uſe ſome one of the precedent
              <lb/>
            Methods.</s>
            <s xml:id="echoid-s678" xml:space="preserve"/>
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        <div xml:id="echoid-div84" type="section" level="1" n="47">
          <head xml:id="echoid-head49" xml:space="preserve">
            <emph style="sc">Corollary</emph>
          .</head>
          <p>
            <s xml:id="echoid-s679" xml:space="preserve">38. </s>
            <s xml:id="echoid-s680" xml:space="preserve">It appears from this Method, that when
              <lb/>
            the Repreſentations of two Points are found,
              <lb/>
            the Appearance of any third Point whatſoever
              <lb/>
            may be had, without having any Regard to the
              <lb/>
            Situation of the Eye; </s>
            <s xml:id="echoid-s681" xml:space="preserve">becauſe two Lines as E a
              <lb/>
            may be drawn, whoſe Interſection will be the
              <lb/>
            Point ſought.</s>
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        </div>
        <div xml:id="echoid-div85" type="section" level="1" n="48">
          <head xml:id="echoid-head50" xml:space="preserve">
            <emph style="sc">Method</emph>
          VI.</head>
          <p>
            <s xml:id="echoid-s683" xml:space="preserve">39. </s>
            <s xml:id="echoid-s684" xml:space="preserve">The ſame things being given, as in the
              <lb/>
              <note position="left" xlink:label="note-0048-01" xlink:href="note-0048-01a" xml:space="preserve">Fig. 12.</note>
            ſecond Method, let F C be the Geometrical Line.</s>
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        <div xml:id="echoid-div87" type="section" level="1" n="49">
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            <emph style="sc">Operation</emph>
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          <p>
            <s xml:id="echoid-s686" xml:space="preserve">Draw two Lines A F and A C from the given
              <lb/>
            Point A at Pleaſure, cutting the Baſe Line in the
              <lb/>
            Points E and B, and interſecting the Geometri-
              <lb/>
            cal Line in the Points F and C. </s>
            <s xml:id="echoid-s687" xml:space="preserve">From theſe
              <lb/>
            two laſt Points draw the Lines F O and C O to
              <lb/>
            the Eye; </s>
            <s xml:id="echoid-s688" xml:space="preserve">then draw E a through the Point E,
              <lb/>
            parallel to F O, and B a through the Point B,
              <lb/>
            parallel to C O, and the Point a the Interſection
              <lb/>
            of theſe two Lines will be that ſought.</s>
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          </p>
          <p>
            <s xml:id="echoid-s690" xml:space="preserve">Note, We might firſt have drawn the Lines
              <lb/>
            O F and O C at Pleaſure, and then have drawn
              <lb/>
            the Lines AC and A F through their </s>
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