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Show DEEPER HARBORS FOR MODERN BOATS Steam Dredges Play an Important Part in Present Day Navigation. Navi-gation. Special to The Tribune. T. LOUIS. April 10. Models, of flvo R vessels, one sailing ship, .thrco types of steamships and a monster steam kJr dredge form part of tho exhibit made by tho United Slates War department depart-ment at tho World's fair. Tho dredge, which will be used to dig tho Ambrose channel. Is constructed on tho line of a steamship, and Is 2$S feet long. H Is the twin-screw type, but in the placo of a hold has two hoppors, one forward nnd one aft. Into which the sand from tho bottom of the bay can bo drawn. On cither side of tho vessel, about midship, mid-ship, are twenty-Inch auction pipes eighty feet long. Tho other models aro lo be used at tho World's fair to demonstrate tho necessity for deepening tho channel entering the port of New York. The full-rlggod model shows the typo of a vessel used In lHXi. It had a depth of but eleven feet ami could safely pass Into tho harbor at all times. Another model shows the Britannia, Britan-nia, the first side-wheeler to cross to this port from England. Tho next model Is that of tho Borussla. built In 1Eo7. which drow sixteen feet of water, and could enter tho port only at high water. Three years later, when the Arizona, tho llrst of tho big ocean greyhounds, grey-hounds, was built, the Government undertook under-took to deepen the approaches to New York, and in 1SS1 tho excavating of tho channels began. The Arizona drew twenty-two foot of water and the channel was aiado thirty feot deep, but a model of lhe now vessel, Occarlc. shows fven the Ihlr-ty-foot channel to be Inadequate for the accommodation of the largo ocean craft. |