The Conquest of Canada (Vol. 1&2). George Warburton

The Conquest of Canada (Vol. 1&2) - George Warburton


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sketches of Upper Canada, says that the current of the river has formed a circular excavation in the high and perpendicular banks, resembling a bay. The current, which is extremely rapid, whenever it reaches the upper point of this bay, forsakes the direct channel, and sweeps wildly round the sides of it; when, having made this extraordinary circuit, it regains its proper course, and rushes with perturbed velocity between two perpendicular precipices, which are not more than 400 feet asunder. The surface of the whirlpool is in a state of continual agitation. The water boils, mantles up, and wreaths in a manner that proves its fearful depth, and the confinement it suffers; the trees that come within the sphere of the current are swept along with a quivering, zigzag motion, which it is difficult to describe. This singular body of water must be several hundred feel deep, and has not hitherto been frozen over, although in spring the broken ice that descends from Lake Erie descends in such quantities upon its surface, and becomes so closely wedged together, that it resists the current, and remains till warm weather breaks it up. The whirlpool is one of the greatest natural curiosities in the Upper Province, and its formation can not be rationally accounted for."—Martin's History of Canada, p. 139.

      "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.


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