2
De Morgan’s Trigonometry and Double Algebra, p. 5.
3
English Works of Thos. Hobbes, Edit. by Molesworth, vol. i. p. 95.
4
Confessions, bk. xi. chapters 20–28.
5
Sir G. C. Lewis gives many curious particulars concerning the measurement of time in his Astronomy of the Ancients, pp. 241, &c.
6
Principia, bk. i. Scholium to Definitions. Translated by Motte, vol. i. p. 9. See also p. 11.
7
Rankine, Philosophical Magazine, Feb. 1867, vol. xxxiii. p. 91.
8
Treatise on Natural Philosophy, vol. i. p. 179.
9
Proceedings of the Manchester Philosophical Society, 28th Nov. 1871, vol. xi. p. 33.
10
The Elements of Natural Philosophy, part i. p. 119.
11
See Harris’ Essay upon Money and Coins, part. ii. [1758] p. 127.