Mémoires de l'Académie, 1785, p. 612. or Ency. Britann. First Supp. vol. i. p. 614.

Philosophical Transactions, 1834, p, 212.

Philosophical Transactions, 1776, p. 197.

Annales de Chimie, xxi. pp. 127, 178, or Quarterly Journal of Science, xv. 145.

Philosophical Transactions, 1834, p. 230

Ibid. 1821, p. 431.

See 1699-1708.—Dec. 1838

Annales de Chimie, lviii. 60. and lxiii, 20.

Bibliothèque Universelle, 1835, lix. 263. 416.

Quarterly Journal, xxvii. 407. or Bibliothèque Universelle, xl. 205. Kemp says sulphurous acid is a very good conductor, Quarterly Journal, 1831, p. 613.