e liquid column after it, naturally 675 feet from the piers, and a central lever connecting is expelled from the meshes by sharply blowing against to the greatest height, where there is the least liquid or the ends of the cantilevers. As shown in the engrav- them. If now the cup is held as shown… … IMPROVED DOUBLE-HULLED AND DROP-KEELED STEAMSHIPS. readily navigate shallow waters. trait, and a deseription'of his antics, was The cut shows the manner of applica- published in the Scientific American tion of the adj ustable or drop keel. When in actual use, we substitute mercury—a fluid which…
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