[218] See Harris’ Essay upon Money and Coins, part. ii. [1758] p. 127.
[219] Philosophical Magazine, (1868), 4th Series, vol. xxxvi. p. 32.
[220] Proceedings of the Royal Society, 20th June, 1872, vol. xx. p. 438.
[221] Kater’s Treatise on Mechanics, Cabinet Cyclopædia, p. 154.
[222] Grant’s History of Physical Astronomy, p. 156.
[223] Clerk Maxwell’s Theory of Heat, p. 79.
[224] Treatise on Electricity and Magnetism, vol. i. p. 3.
[225] Chemistry for Students, by A. W. Williamson. Clarendon Press Series, 2nd ed. Preface p. vi.
[226] Introduction to Chemistry, p. 131.
[227] Philosophical Transactions (1859), vol. cxlix. p. 884, &c.