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yellow, you will see a new colour, participating of the red and the yellow.

Chap. CCXXXVIII.—That the Beauty of a Colour is to be found in the Lights.

As the quality of colours is discovered to the eye by the light, it is natural to conclude, that where there is most light, there also the true quality of the colour is to be seen; and where there is most shadow the colour will participate of, and be tinged with the colour of that shadow. Remember then to shew the true quality of the colour in the light parts only^[1].

Chap. CCXXXIX.—Of Colours.

The colour which is between the light and the shadow will not be so beautiful as that which is in the full light. Therefore the chief beauty of colours will be found in the principal lights^[2].

1. This rule is not without exception: see chap. ccxxxiv.
2. See chap. ccxxxviii.