Note 610 — Chapter VII

Compare Powell on Radiant Heat (Brit. Assoc. vol. i. p. 287), with Lloyd's Report on Physical Optics, 1834, p. 338. For the remarks on colours, see Boyle's Works, vol. ii. pp. 1–40; and for the account of his experiments, pp. 41–80; and a slight notice in Brewster's Life of Newton, vol. i. pp. 155, 156, 236. It is, I think, not generally known, that Power is said to be indebted to Boyle for originating some of his experiments on colours. See a letter from Hooke, in Boyle's Works, vol. v. p. 533.