[358] See Bunsen and Roscoe’s researches, in Philosophical Transactions (1859), vol. cxlix. p. 880, &c., where they describe a constant flame of carbon monoxide gas.
[359] Humboldt’s Cosmos (Bohn), vol. i. p. 7.
[360] Gilbert, De Magnete, p. 109.
[361] Principia, bk. iii. Prop. vi.
[362] Philosophical Magazine, 3rd Series, vol. xxvi. p. 375.
[363] Opticks, 3rd edit. p. 159.
[364] Watts, Dictionary of Chemistry, vol. iii. p. 637.
[365] Faraday’s Life, by Bence Jones, vol. ii. p. 5.
[366] Preliminary Discourse, &c., p. 185.
[367] Philosophical Magazine, July, 1857, 4th Series, vol. xiv. p. 24.