[558] Stewart’s Elementary Treatise on Heat, p. 80.

[559] Jevons, Proceedings of the Manchester Literary and Philosophical Society, 6th March, 1877, vol. xvi. p. 164. See also Mr. W. E. A. Axon’s note on the same subject, ibid. p. 166.

[560] A Treatise on Logic, or, the Laws of Pure Thought, by Francis Bowen, Professor of Moral Philosophy in Harvard College, Cambridge, United States, 1866, p. 315.

[561] Proceedings of the Royal Society, November, 1873, vol. xxi. p. 512.

[562] Lectures on the Elements of Comparative Anatomy, 1864, p. 1.

[563] Essai sur la Philosophie des Sciences, p. 9.

[564] Lectures on the Elements of Comparative Anatomy, and on the Classification of Animals, 1864, p. 3.

[565] Ossemens Fossiles, 4th edit. vol. i. p. 164. Quoted by Huxley, Lectures, &c., p. 5.

[566] Chambers, Descriptive Astronomy, 1st edit. p. 23.

[567] Philosophical Magazine, 4th Series, vol. xxxix. p. 396; vol. xl. p. 183; vol. xli. p. 44. See also Proctor, Popular Science Review, October 1874, p. 350.