1824
THE NEW ZEALAND GAZETTE.
[No. 71

reaction. (4.) Modified form of the process of claim 1 or 2, characterized in that the whole of the excess hydrogen or part of the excess hydrogen is mixed with the reaction gases after the conversion by the nickel. (5.) Modified form of the process of claim 1, 2, 3, or 4, characterized in that the gas obtained as described in said claims respectively is passed through retorts wherein coal is undergoing distillation, whereby decomposition of the higher hydrocarbons of such coal is largely prevented, the gas passed through the retorts is enriched by said hydrocarbons, and a gas of high calorific and illuminating value can be obtained. (6.) Modified form of the process of claim 1, 2, 3, or 4, characterized in that the gas obtained as described in the said claims respectively is mixed in any desired proportion with coal-gas or other combustible gas to obtain any given illuminating or calorific power. (7.) As a new article of manufacture, a gas for lighting, heating, or power purposes, composed practically entirely of methane and hydrogen, and substantially free from carbon monoxide, said gas being subsequently carburetted or not.
(Specification, 11s. 6d.)

No. 19632.—27th June, 1905.—HERBERT SAMUEL ELWORTHY, of Battlefield Road, St. Albans, Herts, England, Consulting Engineer. Improvements in the production or preparation of nickel.

Claims.—(1.) Method or process for the production or preparation of nickel, characterized in that commercial oxide or other reducible compound or salt of nickel is reduced by hydrogen, water-gas or other reducing gas, and the resulting metallic nickel then heated, preferably in an atmosphere of a gas inert thereto, whereby the nickel becomes pasty and coherent, and when cold can be broken up into porous or spongy grains. (2.) Method or process for the preparation of nickel, characterized in that gaseous nickel carbonyl is led over broken fire-brick, numice stone, asbestos fibre, or like porous material at a sufficient temperature to decompose the nickel carbonyl whereby the nickel is deposited on the porous material. (3.) As a new article of manufacture, nickel in porous or spongy form, such as can be obtained according to claim 1.
(Specification, 3s. 6d.)

No. 19633.—27th June, 1905.—HENRY LIVINGSTONE SULMAN and HUGH FITZALIS KIRKPATRICK-PICARD, both of 44, London Wall, London, England, Metallurgists; and JOHN BALLOT, of 62, London Wall, London, England, Merchant. Improvements in or relating to ore-concentration.

Claims.—(1.) The process of concentrating ores in which finely powdered ore suspended in acidified water is mixed with a small proportion of an oily substance such as oleic acid, amounting to a fraction of 1 per cent. on the ore, and agitated until the oil coated metalliferous matter forms into a froth, which can be separated from the gangue by flotation. (2.) In the process of concentrating ores covered by claim 1, warming the pulp (say, to 30°-40° C.) to facilitate the oiling of the metalliferous matter. (3.) The process of concentrating ores which consists in agitating the finely powdered ore suspended in acidified water with a small proportion of an oily substance such as oleic acid, amounting to a fraction of 1 per cent. on the ore, until the slime mineral forms a froth, separating the froth by flotation, and separating the coarser mineral from the gangue by exposing them alternately to air and water on a shaking-table or the like. (4.) The process of concentrating ores which consists in agitating the powdered ore suspended in the water with a small proportion of an oily substance such as oleic acid, amounting to a fraction of 1 per cent. on the ore, until the oil-coated slime mineral forms a froth, distributing the mixture on the surface of a current of water running over spitzkasten so that the coarser minerals and sands, the finer sands, and gangue slimes successively deposit out while the froth is floated away by the current and separated by filtration. (5.) The process of concentrating ores which consists in mixing the pulp with a soap-solution and a mineral acid whereby the fatty acid is liberated and adheres to the mineral, having an affinity therefor but not to the gangue, substantially as described. (6.) The process of concentrating ores which consists in mixing the pulp with a soap-solution and a mineral acid which liberates the fatty or resin acid therefrom, separating the coated mineral matter from the non-coated gangue, and removing the fatty or resin acid from the metalliferous matter by adding alkali, substantially as described. (7.) In the process of concentrating ores by the use of soap, liberating the fatty or resin acid from the soap by the addition of mineral acid at one stage, and reproducing the soap by the addition of alkali at another stage, substantially as described. (8.) The process of concentrating ores which consists in agitating pulp with a soap-solution and a mineral acid so as to liberate the fatty or resin acids and agglomerate the particles coated therewith into granules or small masses, and then acting on the mixture by a classification apparatus so as to remove the small non-coated particles from the agglomerated masses of coated particles, substantially as described. (9.) The process of concentrating ores which consists in bringing the pulp into intimate contact, first with a soap-solution and a mineral acid which liberates the fatty or resin acid, and thereafter with a gas, substantially as and for the purpose described.
(Specification, 12s.; drawing, 1s.)

No. 19634.—27th June, 1905.—HENRY LIVINGSTONE SULMAN and HUGH FITZALIS KIRKPATRICK-PICARD, both of 44, London Wall, London, E.C., England, Metallurgists; and JOHN BALLOT, of 62, London Wall, London, E.C., England, Merchant. Improvements in or relating to ore-concentration.

Claims.—(1.) The process of separating metalliferous matter from gangue in which the powdered ore having been freely exposed to air is brought to the edge or surface of water (preferably acidified), whereby the metalliferous matter floats and is separated from the gangue which sinks. (2.) The process of separating metalliferous matter from gangue, in which the dry powdered ore is fed on to the surface of a current of water (preferably acidified), whereby the gangue penetrates the surface and sinks, while the metalliferous matter floats and is carried away by the current. (3.) The process of separating metalliferous matter from gangue which consists in mixing the mineral pulp with oil, exposing the mineral particles to a free air surface, and thereafter bringing the mineral on to the surface of water or other liquid, whereby the oiled metalliferous particles, having been exposed to the air, float and are separated from the un-oiled gangue which sinks. (4.) The process of separating metalliferous matter from gangue in which the powdered ore, mixed with water, and with or without oil, is distributed in a thin layer upon a surface such as a vanning apparatus so moved that the water alternately leaves the ore exposed to the air, and returning causes the metalliferous matter to float, while the gangue sinks. (5.) The process of separating metalliferous matter from gangue which consists in mixing the powdered ore with water, and with or without oil, distributing the pulp in a thin layer on a shaking-table, vanning apparatus, belt, or the like, and directing jets or currents of air on to the surface to expose the mineral to a free air surface, whereby the metalliferous matter floats and is separated from the gangue which sinks. (6.) In an apparatus for separating metalliferous matter from gangue, the combination with an inclined vanning-table longitudinally reciprocated and having a transverse stream of liquid, of a series of perforated air pipes moved above the table so as to direct currents of air on to the surface of the table and expose the mineral to a free air surface, substantially as described, and illustrated in Fig. 1 of the drawings. (7.) An apparatus for separating metalliferous matter from gangue consisting of a continuous inclined concave belt driven upwardly on the top side, and carried in a frame which is laterally rocked or reciprocated, substantially as described, or illustrated in Fig. 2 or in Fig. 3 of the drawings.
(Specification, 9s.; drawings, 2s.)

No. 19635.—27th June, 1905.—HEMAN COULTHURST, of No. 1, Avondale Road, Darwen; JESHURUN COULTHURST, of No. 51, Blackburn Road, Darwen, aforesaid; ARMENA COULTHURST, of No. 7, Amelia Road, Darwen, aforesaid; MATTHEW YARROW, of No. 9, Ivy Road, Smithills, Bolton; and WALTER RAYMOND HAWORTH, of No. 16, Ivy Road, Smithills, Bolton, aforesaid, all in Lancaster, England, Engineers. Improvements in machines for making earthenware pipes.

Claims.—(1.) In machines of the class described, means whereby the newly formed pipe may be cut off from the substance of which it is produced, by the withdrawal of the core in said machines, substantially as specified. (2.) In machines for the production of earthenware pipes, moulds for forming annular flanges thereon, and means for separating said moulds to allow the withdrawal or detachment of the pipe produced from the machine, substantially as specified. (3.) In machines of the class described, means whereby the interior and exterior parts of a pipe are produced by the movements of the parts, shaping or giving form to said interior and exterior parts, substantially as specified.
(Specification, 6s.; drawing, 4s.)