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Scientific American, Vol. 27, No. 4 (1872) (1872)

leaf 3

An illustration from Scientific American, Vol. 27, No. 4 (1872), 1872, leaf 3
ffices, namely Canada. Our engraving is from the Engineer, The dredger | looks like a big whirligig. The screw, like the one at the| that of impelling the vessel through the water by a drawing : combines in herself the properties of a powerful dredger, a| other end, is made of brass; its diameter… … 28 feet beam. She has a screw at both freshly expressed juice of the electoral

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