[428] Brewster’s Life of Newton, 1st edit. chap. vii.

[429] Discourse on the Study of Natural Philosophy, p. 151.

[430] Ibid. p. 229.

[431] Novum Organum, bk. ii. Aphorism 36.

[432] Principia, bk. i. Sect. xiv. Prop. 96. Scholium. Opticks, Prop. vi. 3rd edit. p. 70.

[433] Airy’s Mathematical Tracts, 3rd edit. pp. 286–288.

[434] Jamin, Cours de Physique, vol. iii. p. 372.

[435] Young’s Lectures on Natural Philosophy (1845), vol. i. p. 361.

[436] Paris, Life of Davy, p. 274.

[437] Opus Majus. Edit. 1733. Cap. x. p. 460.