The Artist's Repository, Or, Encyclopedia of the Fine Arts (Band 2): Perspective, Architecture (London, 1808)

LECT. iilj ON PERSPECTIVE.

109

PLATE XXXVII.

the sun behind the picture.

No. I. In this fubjecl, the place of the fun in the
picture, is beyond the limits of the picture; but its
half elevation is marked, as S. The place of the
^un being determined, alfo its feat on the horizontal
l>ne as H, rule S B, S C, SD, SE; let fall D to d>
«ten from H rule for the interferons HA, which
S^ves 1 for the fhadow of B; He, which gives 2
for.the fhadow of C; Hrf, which gives 3 for the
^adow of D, He which gives 4 for the fhadow ofE.
^nite 2, 3, 4, to complete the fhadow of C, D, E. .

the-sun before the picture,

No. II. Firft determine the feat of the fun, as
^> and its feat on the horizontal line, as H, rule to
^ from B, C, and D, let fall C to c; interfe£t thefe
^nes by others'to H, as A H, which gives 1 for the
Shadow of Bj cH which gives 2 for the Ihadow
<*C, &c. :S '

Such are the general principles of fliadows occa-
sioned by the fun, in which we are to obferve, firft,
^e parallelifm of the fun's rays; fecondly, the place
°f the fun, and the direction of thofe rays; thirdly,
feat of the fun on the horizontal line, for the
^adows of objects on the horizontal plane, or on
*he vertical line, for the (hadows of objects on the
^ertical plane; and fo of any other plane, as al-
ready fhewn. We fhall add a few examples of
Qlhr objeas.

>*°l. in. Edit,7, ? PLATE