Tyndall’s Sound, 1st ed. p. 26.

British Association, Cambridge, 1833. Report, pp. 484–490.

Smithsonian Miscellaneous Collections, vol. xii., the Constants of Nature, part. i. Specific gravities compiled by F. W. Clarke, 8vo. Washington, 1873.

J. W. L. Glaisher, Philosophical Magazine, 4th Series, vol. xlii. p. 421.

Stokes, Philosophical Transactions (1852), vol. cxlii. p. 529.

Admiralty Manual of Scientific Enquiry, 2nd ed. p. 299.

Pouillet, Taylor’s Scientific Memoirs, vol. iv. p. 45.

Baily’s Account of the Rev. John Flamsteed, p. 58.