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widest sense, as we often find it used in Leonardo's writings. The
title "pro" has here been understood to mean Prospettiva, in
accordance with the suggestion afforded by page 10b of this same
MS., where the first section is headed Prospettiva in full (see
No. 94), while the four following sections are headed merely "pro"
(
see No. 85).]
2
83.
WHAT PORTION OF A COLOURED SURFACE OUGHT IN REASON TO BE THE
MOST
INTENSE.
If a is the light, and b illuminated by it in a direct line,
c, on which the light cannot fall, is lighted only by reflection
from b which, let us say, is red. Hence the light reflected from
it, will be affected by the hue of the surface causing it and will
tinge the surface c with red. And if c is also red you will see
it much more intense than b; and if it were yellow you would see
there a colour between yellow and red.
On the use of dark and light colours in painting (284--286).
2
84.
WHY BEAUTIFUL COLOURS MUST BE IN THE [HIGHEST] LIGHT.
210
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