[538] De Morgan, Cambridge Philosophical Transactions, vol. xi. Part ii. p. 246.

[539] Life of Faraday, vol. i. p. 216.

[540] Babbage, The Exposition of 1851, p. 1.

[541] Daubeny’s Atomic Theory, p. 76.

[542] Bakerian Lecture, Philosophical Transactions (1868), vol. clviii. p. 2.

[543] Principia, bk. ii. Prop. 20. Corollaries, 5 and 6.

[544] Treatise on Natural Philosophy, vol. i. p. 50.

[545] Maxwell’s Theory of Heat, (1871), p. 175.

[546] Galton, on the Height and Weight of Boys. Journal of the Anthropological Institute, 1875, p. 174.

[547] Grant’s History of Physical Astronomy, p. 116.