Leonardo, da Vinci, 1452-1519, Rigaud, J. F. (John Francis), 1742-1810, Brown, John William · London : J.B. Nichols and Son ... · leaf 281
roved. Chap. CXCVIII.—Why Colours experience noapparent Change, though placed in differentQualities of Air. It may happen that a colour does not alter,though placed at different distances, when thethickness of the air and the distance are in thesame inverse proportion. It is proved thus:—letA be… … Two degrees of ditto. Three degrees of ditto. 3 degrees of distance. cause the second degree above, A M N L, con-tains a thinner air by one-half, which air conveysthis colour, it foUows that this colour will appearas if removed double the distance it was at before,viz. at two degrees of distance, A…
Leonardo, da Vinci, 1452-1519 · Painting · Drawing · Perspective
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