Next to the fisheries, the preparation of sea salt constitutes one of the leading industries of the Mediterranean coast-lands. But this industry, too, is frequently carried on in a primitive way, and only in the course of the present century have scientific methods been introduced in connection with it. The Mediterranean is admirably suited for the production of salt, for its waters have a high temperature, they hold a very large quantity of salt in solution, the rise and fall of the tides are inconsiderable, and flat seashores alternate with steep coasts and promontories. The most productive salt marshes of the Mediterranean are probably those on the Lagoon, or Étang de Thau, near Cette, and on the littoral of Hyères; but considerable ones may also be met with on the coasts of Spain, in Italy, in Sardinia, Sicily, Istria, and even on the “limans” of Bessarabia, bordering upon the Black Sea. The annual production of salt is estimated at more than a million tons, and exceeds, therefore, the entire tonnage of the commercial marine of France.[10] But this quantity, large as it is, is infinitesimal if we compare it with the saline contents of the sea, and science will enable us one day to raise a far more abundant treasure from its sterile depths.[11] III.—COMMERCE AND NAVIGATION. Whatever advantages may be yielded by fisheries and salt-works, they shrink into insignificance if we compare them with the great gain—material, intellectual, {32} and moral—which mankind has derived from the navigation of this inland sea. It has repeatedly been pointed out by historians that the disposition of the coasts, islands, and peninsulas of the Mediterranean of the Phœnicians and Greeks admirably favoured the first essays in maritime commerce. Many causes have contributed to make this sea the cradle of European commerce: the faint summits of distant lands visible even before the port has been quitted; numerous nooks along the coasts where a safe refuge may be found in case of storms; regular land and sea breezes; an equability of climate which makes the sailor feel at home wherever business takes him; and, moreover, a great variety of productions resulting from the diverse configuration of the Mediterranean coast-lands. And this commerce, does it not lead to a peaceful intercourse between peoples on neutral ground, and to mutual enlightenment, brought about by an interchange of ideas? Every coast-line which facilitates the intercourse between nations is, therefore, of immense value as a means of developing civilisation.