[187] Richardson and Watts’ Chem. Tech., 2d edit., 1863, vol. i., part iii., pp. 2 and 3. This old calcarelle furnace has been greatly improved. It must not be described as a “blast-furnace.”
[188] Simmond’s Dict. Trade Products, 1863, art. “Sulphur.”
[189] Quoted in extenso, Appendix, Section III.
[190] Henderson’s Iceland, 1818, Introduction, p. 4.
[191] Ibid., p. 7.
[192] Ibid., vol. i., p. 160.
[193] Ibid., p. 176.
[194] Henderson’s Iceland, 1818, vol. i., pp. 166, 167, 170, 171, 173, 174, 177.
[195] S. Baring-Gould’s Iceland, 1863.
[196] Shepherd’s North-West Peninsula of Iceland, 1867, p. 157.