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The Artist's Assistant, In the Study and Practice of Mechanical Sciences: Calculated for the Improvement of Genius. Illustrated with Copper-Plates — Birmingham, [ca. 1785]

DOI Page / Citation link:
https://doi.org/10.11588/diglit.19571#0110
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96 THE ARTIST'S ASSISTANT.

landfkape, to difpofe thofe colours near one another,
which mutually aihft and raife each others force
and brifknefs; as red and green, yellow and blue.

To manage them fo, as that they may be accom-
modated to the effe&s of the great parts of light
and colours ; that the ftrong colours lead to the foft
ones, and make them more looked at, bringing them
forwards, or keeping them back, according to the
fituation and the degree of force required.

For the effects of colours, they either regard the
union, or the ceconomy ; with refpect to the firfl,
care muff, be taken that they be laid fo as to be
fweetjy united under the brifknefs of fome prin-
cipal one ; that they participate of the prevailing
light of this piece, and that they partake of each
other by the communication of light, and the help
of reflection.

For the ceconomy in managing their degrees, re-
gard is to be had to the contrail, or the oppofition
intervening in the union of the colours, that, by a
fweet interruption, the brifknefs, which othcrwife
fades and palls, may be raifecl ; to the harmony,
which makes the variety of colours agree, fupply-
ing and fuftaining the weaknefs of fome by the
ftrength of others, neglecting fome places on pur-
pofe to ferve as a bafis or repofe to the light, and to
inhance thofe which are to prevail through the
piece : to the degredation, where the better to pro-
portion the colours that fall behind, fome of the
fame kind are to be preferved in their purity, as a
ftandard, for thofe carried afar off to be compared
by, in order to juftify the diminution : regard being
always had to the quality of the air, which, when
loaded with vapours, weakens the colours more

than
 
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