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Updated: May 21, 2025
From some cause and many causes might be imagined this earth-and-water surface of say two hundred miles in circumference, sank into the interior of the earth, and the boiling lava came to the surface. We can scarcely conceive of the awful effect when the Antarctic Sea poured over the circumference of this mass of boiling earth and metal.
Thus, prior to 1800 almost every type of mechanism for the propulsion of steamboats had been suggested and tried; and in 1804, Stevens's twin-screw propeller completed the list. It is not alone Fitch's development of the devices of the endless chain, paddle wheel, and screw propeller and of his puzzling earth-and-water creature that gives luster to his name.
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