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DYEING.—Louis J. J. Malegue, of Paris,patentee.—The inventor prepares his coloring composition for dyeing rose color thus :—Four ounces of ammoniacal cochineal are dissolved in a quart ot hot water and boiled for ten minutes, after which 88 grains of salt of tin, 140 grains of crystals of tartar or bitartrate of potash, 1 oz. of saturated aqueous solution of sulphurous acid, and 140 giains of the solution of tin are added; the whole is then boiled for about half an hour and then allowed to cool in a glass or earthenware vessel, and afterwards decanted into another vessel. Two ounces of the carmine of safranum are then added, and well mixed with the solution. A small quantity of this composition is then mixed with a quantity of hot water, and tar-taric acid is added in the proportion of about 1 oz. to 8 or 10 gallons of water, and then an additional quantity of the dye added sufficient to produce the required rose-tint. The solution ot tin above mentioned is formed by dissolving 9 parts, by weight, of pure tin in 3 parts of nitric acid and 18 parts of muriatic acid. The ammoniacal cochineal is produced by boiling finely ground cochineal in twice its weight of solution of ammonia for several hours. The mixture should be well stirred, and when it becomes thick it should be placed upon a cloth stretched on a piece of wicker work and dried in a stove, and then cut or broken into pieces. The salt of tin is prepared by dissolving pure tin filings or grains in muriatic acid, to which has been added one-fifth part of its weight of nitric acid, and then evaporating the solution in a water-bath till the solid salt is obtained. For dyeing purple the process is the same, with the exception that 350 grains of solution of tin are employed instead of 140, and 1 oz. of carmine of safranum instead of 2 ozs. Balloons.—J. H. Johnson, London.—The apparatus specified under this patent consists of a balloon of an elongated form, from which is suspended a platform or frame to cafrry the propelling, directing, and governing machinery, and the aeronauts. There are four wheels fixed at the extremity of two transverse para-rallel shafts, set in motion by a gmall steam engine, which, with its boiler, is placed in any convenient part of the frame, and a number of wings extending from the shafts of these wheels, for the purpose ot counteraf-tiag the effect of the air against the balloon; on each side of the platform is an apparatus similar to an umbrella or parachute, which, by alternately opening and closing, exerts a propelling power. A s-eriss of horizontal wings, form a means of regulating the ascent and descent of the balloon, and sliding weights are used, by which the centre of gravity of the whole can be changed, and its angle of inclination determined. The balloon is furnished with a rudder similar to that of a ship, by which its course through the air may be governed.
