Philosophical Magazine, (1868), 4th Series, vol. xxxvi. p. 32.

Proceedings of the Royal Society, 20th June, 1872, vol. xx. p. 438.

Kater’s Treatise on Mechanics, Cabinet Cyclopædia, p. 154.

Grant’s History of Physical Astronomy, p. 156.

Clerk Maxwell’s Theory of Heat, p. 79.

Treatise on Electricity and Magnetism, vol. i. p. 3.

Chemistry for Students, by A. W. Williamson. Clarendon Press Series, 2nd ed. Preface p. vi.

Introduction to Chemistry, p. 131.

Philosophical Transactions (1859), vol. cxlix. p. 884, &c.

Théorie Analytique de la Chaleur, Paris; 1822, §§ 157–162.