� tientifit �meritan� I preference being for large and singnlarly I rigged vessels-three-masted, with yards and I sqnare sails on the foremast, common "fore and aft" &ails on the other mas ts, and the small quantity due to Canadian trilde, is given' through a slot on the side next the window. at 45,126 tuns-about one· twelfth of the U. S. This pin connects by a short li�k, H, to the ==== == == == == == == == : whole hnll and rigging somewhat wea.ker Notes o n Science and Forcll.m I nvention.. I

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... than those employed on the ocean-large Case Hardening Iron and Steel.-It is a com-propellers, with little or no rigging, and mon practice to harden the surface of various magnificent side-wheel steamers, rivalling articles of iron and 80ft steel , by coating them those on Long Island Seund a.nd other par i with the prussiate of potash ground into powtia]]y exposed and well patronized seaboard . der, and