The artists repository and drawing magazine: exhibiting the principles of the polite arts in their various branches — 3.1789

Page: 106
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very much contributes. If to the idea of
clouds and their intervals, you add a brisk
wind impelling them in rapid succdTion after
each other, you may easily imagine its esfect
upon the light, and its perpetual change of
illuminated appearances; every objedt being
by turns enlightened, and darkened; now re-
splendent, now gloomy; presently emerging
from obscurity into demi-tint; or from derm-
tint becoming obscure.
It is nevertheless very certain, that thefe ac-
cidents, although exceptions to general rules,
by no means supersede their utility: they only
prove that Nature osfers an infinite variety for
our amusement, recreation, and study. Happy
the Genius, whose enlightened skil] attains to
an agreeable imitation of them ! Happy the
Artist, whose works, instead of tedious simi-
larity, present those siriking and energetic com-
positions, which are visible alone to the inge-
nious and well-informed!
This may be a proper place to enquire by
what principles some objedts, or parts of ob-
jects appear to advance, and others to retire.
It is, because the light from the nearesl part of
the surface has so much greater force than that
from the further end: this effiedt, although
dependent on the principles of perspedtive, is
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