of the most complicated combinations. That we are compelled in this case to assume three leading colours has been already remarked by other observers.
61.
When in this completeness the elements of which it is composed are still appreciable by the eye, the result is justly called harmony. We shall subsequently endeavour to show how the theory of the harmony of colours may be deduced from these phenomena, and how, simply through these qualities, colours may be capable of being applied to æsthetic purposes. This will be shown when we have gone through the whole circle of our observations, returning to the point from which we started.
VI.
COLOURED SHADOWS.
62.
Before, however, we proceed further, we have yet to observe some very remarkable cases of the vivacity with