Philosophical Magazine, 4th Series, vol. i. p. 182.

Maxwell, Theory of Heat, p. 123.

Prior Analytics, ii. 2, 8, and elsewhere.

Hofmann’s Introduction to Chemistry, p. 198.

Stewart’s Elementary Treatise on Heat, p. 80.

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.

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.

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