[27] Ibid.
[28] Huxley’s “Physiography.”
[29] Sir Robert Christison’s “Treatise on Poisons.”
[30] Sea-water contains 2·5 per cent. of the chloride of sodium; some say 4 per cent.; according to others, 5·7.
[31] It is well worth remembering that the Thames carries away from its basin above Kingston 548,230 tons of saline matter annually.
[32] Hence arose the custom of asking for salt at the Eton Montem.
[33] Sir R. S. Murchison, “The Mineral Springs of Gloucestershire and Worcestershire.”
[34] Dr. Mantell’s “Wonders of Geology.”
[35] There are the noted salt-works near Portobello, Edinburgh, which have been so truthfully presented to us on canvas by Mr. Edward Duncan.
[36] In Prussia salt is obtained from the brine-springs of that part of Saxony which is subject to her jurisdiction. It also exists in abundance in Bavaria and Würtemberg; and it is the chief mineral production of the Grand Duchy of Baden.