Watts, Dictionary of Chemistry, vol. ii, p. 39, &c.

De Morgan’s Budget of Paradoxes, p. 291.

Life of Faraday, vol. ii p. 396.

Experimental Researches in Electricity, 1st Series, pp. 24–44.

Airy, On Tides and Waves, Encyclopædia Metropolitana, p. 348*

Lib. i. cap. 74.

Taylor’s Scientific Memoirs, vol. v. p. 241.

Airy’s Mathematical Tracts, 3rd edit. p. 312.

Young’s Works, vol. i. p. 412.

Lloyd’s Wave Theory, Part ii. pp. 52–58. Babbage, Ninth Bridgewater Treatise, p. 104, quoting Lloyd, Transactions of the Royal Irish Academy, vol. xvii. Clifton, Quarterly Journal of Pure and Applied Mathematics, January 1860.

Encyclopædia Metropolitana, art. Sound, p. 753.

Tyndall’s Sound, pp. 261, 273.

Whewell’s History of the Inductive Sciences, vol. ii. p. 471. Herschel’s Physical Geography, § 77.

Maxwell’s Theory of Heat, p. 174. Philosophical Magazine, August 1850. Third Series, vol. xxxvii. p. 123.

Philosophical Transactions, 1858, vol. cxlviii. p. 127.