In 1810 it was still fifteen fathoms below the surface of the
sea, but in 1830 it had risen to within three or four. It rises steeply
like a great cone, from the bottom of the sea, and the continuous activity
of the submarine crater is obvious from the circumstance that sulphurous
acid vapors are mixed with the sea water, in the eastern bay of Neokaimeni,
in the same manner as at Vromolimni, near Methana. Coppered ships lie at
anchor in the bay in order to get their bottoms cleaned and polished by this
natural (volcanic) process. (Virlet, in the 'Bulletin de la Societe
Geologique de France', t. iii., p. 109, and Fiedler 'Reise durch
Griechenland', th. ii., s. 469 and 584.)
Similar insular elevations, and almost always at regular intervals of 80 or
90 years,* have been manifested in the island of St. Michael, in the Azores;
but in this case the bottom of the sea has not been elevated at exactly the
same parts.**
[footnote] *Appearance of a new island near St. Miguel, one of the Azores,
11th of June, 1638, 31st of December, 1719, 13th of June, 1811.
[footnote] **[My esteemed friend, Dr. Webster, professor of Chemistry and
Mineralogy at Harvard College, Cambridge, Massachusetts, U. S., in his
'Description of the Island of St.
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