Jevons in Watts’ Dictionary of Chemistry, vol. ii. pp. 936, 937.

Discovery of Subterraneal Treasure. London, 1639, p. 48.

Laplace, System of the World, translated by Harte, vol. ii. p. 322.

Principia, bk. ii. sect. 6, Prop. xxxi. Motte’s translation, vol. ii. p. 108.

Essayes of Natural Experiments, &c. p. 117.

Hooke’s Posthumous Works, p. 182.

Principia, bk. iii. Prop. vii. Corollary 1.

Keill’s Introduction to Natural Philosophy, 3rd ed., London, 1733, pp. 48–54.

Discovery of Subterraneal Treasure, 1639, p. 52.

Elements of Inductive Logic, 1st edit. p. 175.

Philosophical Transactions, vol. li. p. 138; abridgment, vol. xi. p. 355.

See Bunsen and Roscoe’s researches, in Philosophical Transactions (1859), vol. cxlix. p. 880, &c., where they describe a constant flame of carbon monoxide gas.

Humboldt’s Cosmos (Bohn), vol. i. p. 7.

Gilbert, De Magnete, p. 109.

Principia, bk. iii. Prop. vi.