Gravesande, Willem Jacob 's, An essay on perspective

Table of figures

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[11] Plate 4.Page 24.Fig. 10.f F O G g V D N L a P E H I M A
[12] Plate 5.page 26.Fig. 11.O Y b X a E Z A B
[13] Fig. 12.M O Y F S C L D X a E B Z A
[14] Plate 6.page 28.Fig. 13.O D c b a g E G B A C
[15] Fig. 14.O b 1 2 3 a c 1 2 3 g D A C 3 1 2 2 1 3 B G
[16] page 28.Plate. 7Fig. 16Fig. 15O G F I Vl d c e m n b a h B A H M N C E P D L
[17] page 36.Plate 8Fig. 17O G F c d b a A B D C
[18] Page 36.Plate 9Fig. 18.G F C S V I E B A
[19] Fig. 19.O i M X L D @ b a
[20] Fig. 20.S x G n H S V D l R f Q m P t
[21] Fig. 21.I X f T L B N A C l M E F
[22] page 38Plate 10.Fig. 22.V F I N a G H M P D E B C L A
[23] Fig. 23.O F I H a G D E B C L A M
[24] Fig. 24.@ o f X a e A
[25] page 42Plate 11.Fig. 25.S F V M I N P H a L D E G C A B
[26] Fig. 26.Fig. 27.S V P Q R n l g h G H B N I A C M L
[27] page 46Plate 12.Fig. 28.
[28] Fig. 29.F S V q q q E L p p p I G H q D P n n n T R m m m C B Q A
[29] Fig. 30.O X E L N M G Z Y D
[30] Fig. 31.f 3 c l n m g 4
[31] page 48.Plate 13.Fig. 32.V S R L P B D Q T M I F A E Y C G O H Z N
[32] page 52.Plate. 14.Fig. 34D C F G A B H L E
[33] Fig. 33S X 8 1 h 6 g 3 z q 9 m 2 4 m a 5 Y
[34] Fig. 35O M D P T Q R m p q B A S C
[35] page 56.Plate. 15F H O Z D G
[36] Fig. 36T N M L a R Q E I A C P B
[37] Fig. 37F S V T I E M A N X P C B
[38] page 58.Plate. 16Fig. 39Fig. 38F Q O p l r s 1 2 3 4 G
[39] page 60.Plate. 17F V
[40] Fig. 40c θ b e a F G H I K L A B E C D
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          <pb o="v" file="0013" n="13" rhead="The PREFACE."/>
          <p style="it">
            <s xml:id="echoid-s82" xml:space="preserve">The Practice of Perſpective may be made
              <lb/>
            eaſy, by the Three following Things in this
              <lb/>
            Treatiſe: </s>
            <s xml:id="echoid-s83" xml:space="preserve">Viz. </s>
            <s xml:id="echoid-s84" xml:space="preserve">1. </s>
            <s xml:id="echoid-s85" xml:space="preserve">In giving ſeveral new
              <lb/>
            and eaſier Ways (than thoſe commonly uſed)
              <lb/>
            of ſolving the moſt general Problems upon
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            which the whole Practice is founded: </s>
            <s xml:id="echoid-s86" xml:space="preserve">And the
              <lb/>
            Reaſon why we have laid down ſeveral So-
              <lb/>
            lutions, is, becauſe the ſame Way is not always
              <lb/>
            equally convenient in all Caſes; </s>
            <s xml:id="echoid-s87" xml:space="preserve">whence it is
              <lb/>
            neceſſary to have ſeveral, that ſo we may
              <lb/>
            chuſe one beſt ſuiting our Purpoſe. </s>
            <s xml:id="echoid-s88" xml:space="preserve">2. </s>
            <s xml:id="echoid-s89" xml:space="preserve">The
              <lb/>
            general Methods, which have been us’d hi-
              <lb/>
            therto, not being practicable on ſome particu-
              <lb/>
            lar Occaſions; </s>
            <s xml:id="echoid-s90" xml:space="preserve">to remedy this, we have ad-
              <lb/>
            ded others to them; </s>
            <s xml:id="echoid-s91" xml:space="preserve">which are indeed more
              <lb/>
            difficult, but (in ſome Caſes) there is an ab-
              <lb/>
            ſolute Neceſſity for them. </s>
            <s xml:id="echoid-s92" xml:space="preserve">3. </s>
            <s xml:id="echoid-s93" xml:space="preserve">When it is ve-
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            ry difficult to reſolve a particular Problem,
              <lb/>
            by means of general ones; </s>
            <s xml:id="echoid-s94" xml:space="preserve">then we have
              <lb/>
            thought it convenient to give a particular So-
              <lb/>
            lution thereof.</s>
            <s xml:id="echoid-s95" xml:space="preserve"/>
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          <p style="it">
            <s xml:id="echoid-s96" xml:space="preserve">By this means, the Study of Perſpective
              <lb/>
            becomes indeed more difficult; </s>
            <s xml:id="echoid-s97" xml:space="preserve">but the Diſ-
              <lb/>
            advantage is well recompenſed by the Faci-
              <lb/>
            cility of the Practice, which we have entire-
              <lb/>
            ly had in view. </s>
            <s xml:id="echoid-s98" xml:space="preserve">It is true, that a few ge-
              <lb/>
            neral Rules do not ſo much burthen the Me-
              <lb/>
            mory; </s>
            <s xml:id="echoid-s99" xml:space="preserve">but when one has ſeveral general
              <lb/>
            ones, and alſo particular ones, by them we
              <lb/>
            can abridge Matters. </s>
            <s xml:id="echoid-s100" xml:space="preserve">And this Method </s>
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