The History of the Conquest of Canada. George Warburton. Читать онлайн. Newlib. NEWLIB.NET

Автор: George Warburton
Издательство: Bookwire
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Жанр произведения: Документальная литература
Год издания: 0
isbn: 4064066393687
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to its present site."—Lyell's Geology.

      "The great earthquake that destroyed Lisbon happened on the 1st of November, 1755, and on Lake Ontario strong agitations of the water were observed from the month of October, 1755."—Lettera Rarissima data nelle Indie nella Isola di Jamaica a 7 Julio del 1503 (Bassano, 1810, p. 29).

      "From some submarine center in the Atlantic, this earthquake spread one enormous convulsion over an area of 700,000 square miles, agitating, by a single impulse, the lakes of Scotland and Sweden, and the islands of the West Indian Sea. Not, however, by a simultaneous shock, for the element of time comes in with the distance of undulation; and, together with this, another complexity of action in the transmission of earthquake movements through the sea, arising from the different rate of progression at different depths. In the fact that the wave of the Lisbon earthquake reached Plymouth at the rate of 2.1 miles per minute, and Barbadoes at 7.3 miles per minute, there is illustration of the law that the velocity of a wave is proportional to the square root of its depth, and becomes a substitute for the sounding line in fixing the mean proportional depth of different parts of this great ocean."—Humboldt.