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PURIFYING OIL.—J. P. Wilson, of London, patentee.—This improvement consists in de priving oleic acid of its objectionable smell, so as to render it fit for preparing wool tor ma nufacturing. (He is evidently not acquainted with the American invention of using steam for the same purpose.) The bad odor of the oleic acid is dispelled by heating it in a vessel heated with high pressure steam, and kept at a temperature of 400 Fah., for about two hours. It is afterwards cooled down by the introduction of cold water, when it is fit for use. ANOTHER OF THE SAME —George Hutchin-son, of Glasgow, patentee.—This invention consists in imparting additional fluidity to lard or tallow oil, or other oils of a naturally viscid character by combining them with chloric ether, so as to give them a character resembling sperm oil. The chloric is found to produce the best effect when used in the pro portion of one pa A to two parts by measure of neutral tallow oil. REFINING SUGAR.—John Mclntosh, of Sur-ry, patentee.—The improvement consists in placing evaporating pans used in the concen-centration of saccharine fluids in rooms, the air of which is heated to such a temperature as will evaporate the fluid. A current of air is made to circulate through the room, so as to carry off the vapors "as the saccharine fluids are raised by endless bands passing over and under rollers in and above the pans, to expose an extended surface to the action of the heated air. This is nearly the same kind of an invention as that recently secured by Mr. Bessemer, of London, in this country, the claims of whose patents were recently published in our columns. INDIA RUBBER AND COAL TAR.—Mr. C. Goodyear, of this city, has recently taken out a patent in England, for a new compound, composed of india rubber and coal tar vulcan ized with sulphur. Coal tar is heated in an open boiler until it acquires the consistency of melted rosin, when it is mixed with india rubber, in proportions which may vary ac cording to the character of the material to be produced for a specific purpose. It is mixed with sulphur and thenTieated to vulcanize it. INDIA RUBBER TEETH—This article, in the form of purified white india rubber, has been patented in England, for making artificial teeth, gums, and palates. By its adoption ma ny advantages hitherto impossible to be at tained, have been introduced. The adhesion is complete, it can be moulded with perfec tion, to suit every inequality ot the gums and teeth, and supplies an artificial periosteum, as it were, to the teeth, when become painful by the wasting away of the gum, added to these is the elasticity of the material, which com pletely obviates tlfc inconveniences that arise from any motion with artificial teeth as made by other means. [Condensed and selected from the " London Expositor," " Mechanics' Magazine," " Arti san," " Repertory of Inventions," and " Genie Industriel," Paris.
