Light visible and invisible : a series of lectures delivered at the Royal Institution of Great Britain, at Christmas, 1896 (1897)
Thompson, Silvanus Phillips, 1851-1916, Royal Institution of Great Britain · New York : Macmillan · leaf 105
colours desired to be mixed, is capable of extension to other cases. Suppose we wish, for example, to mix red and green, or blue and orange together, we have only to paint 1 The colour-whirler actually shown was lent by Messrs. Harveyand Peak, who use strips of brilliantly tinted paper pasted upon…
Light · X-rays
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