[635] “Terræ sudor;” according to Aristotle, Meteor. ii. 4: this opinion was adopted by some of the ancients.
[636] The commentators discuss at considerable length the relative merits of the three hypotheses here proposed, to account for the saltness of the ocean; all of which are equally unfounded. See Hardouin in Lemaire, i. 434, 435. Aristotle’s opinion on this subject is contained in his Meteor.
[637] It is not easy to ascertain the origin of the very general opinion respecting the peculiar physical action of the moon. The alleged facts are, for the most part, without foundation, and I am not aware of any circumstance which could, originally, have made them a part of the popular creed of so many nations, ancient as well as modern. Perhaps some of the effects which have been ascribed to the specific action of the moon, may be explained by the lower temperature and greater dampness of the air, during the absence of the sun.
[638] There appears to be some doubt respecting the history of the person here referred to: according to the account of Hardouin, Fabianus was a naturalist, who enjoyed a high reputation; he lived in the time of Tiberius: see Lemaire, i. 188.
[639] This would be a depth of 3125 yards, not very far short of two miles; see Adam’s Rom. Antiq. p. 503.
[640] “Βαθέα Ponti;” Aristotle refers to this as one of those parts where the sea is unfathomable; Meteor. i. 13.
[641] A distance of nearly nine and a half miles.
[642] The specific gravity of sea water varies from 1·0269 to 1·0285. The saline contents of the water of the English Channel are stated to be 27 grs. in 1000. Turner’s Chem. p. 1289, 1290.
[643] The modern names of the rivers and lakes here mentioned are the Liris, communicating with the Lago di Celano; the Adda, with the Lago di Como; the Ticino, with the Lago Maggiore; the Mincio, with the Lago di Guarda; the Oglio, with the Lago di Sero; and the Rhone with the Lake of Geneva. There may be some foundation for the alleged fact, because the specific gravity and the temperature of the lake may differ a little from that of the river which passes through it.
[644] According to Brotier, “fons ille olim nobilissimus, nunc ignobile est lavacrum, cujus aqua marino sapore inficitur.” He conceives that there is no actual foundation for this so frequently repeated story; and conjectures that it originated from the similitude of the names, the fountain in Sicily and the river in the Peloponnesus being both named Alpheus. He goes on to mention some examples of springs of fresh water rising up on the sea-coast; Lemaire, i. 438. The allusion to the fountain of Arethusa, by Virgil, in the commencement of the 10th eclogue, is well known to all classical scholars. The lines of Virgil have been elegantly imitated by Voltaire, in the Henriade, ix. 269, 270.