Sept. 5.] THE NEW ZEALAND GAZETTE. 2797

No. 23202.—25th July, 1907.—DUDLEY HIRAM NORRIS, a citizen of the United States of America, residing at 10 West 49th Street, City, County, and State of New York, United States of America, Lawyer. Concentration of metallic ores.

Extract from Specification.—Briefly stated, the method described consists in creating infinitesimally small nascent bubbles of air continuously in a flowing mixture of pulverised ore and water, said bubbles rising and attaching themselves to the metallic particles of the ore, and thus carrying said metallic particles to the surface of the mixture where they are collected for metallurgical treatment, the barren or rocky particles of the ore, together with the water, passing out of the receptacle into which the flowing mixture is introduced. These infinitesimally small nascent bubbles of air are created in the mixture by introducing a stream of water (containing air in solution) into the lower end of the receptacle into which the flowing mixture of pulverised ore and water is introduced. The apparatus shown for practising this method consists of an open-ended receptacle or tank 1 that is preferably conical-shaped at its opposite ends and is provided at its lower end with a discharge-pipe 2. The pipe 3 that leads from a mixer, not shown, in which the pulverised ore and water are thoroughly mixed together, enters the upper end of the receptacle or tank 1 for conveying the flowing mixture into said tank, and surrounding the contracted portion 4 at the upper end of the tank is a cup-shaped member 5 having a discharge-conduit 6 leading therefrom.

[NOTE.—The above extract from the specification is inserted in place of the claims.]

(Specification, 6s. 9d. ; drawing, 1s.)

No. 23204.—25th July, 1907.—BENJAMIN HALL, of Post-office Box 87 Nevada City, Nevada, California, United States of America, Manufacturer. Process for the extraction of gold and silver from ores.

Claims.—(1.) The process of recovering gold and silver from their ores, said process consisting in mixing the dry ore with a cyanide-solution, then loosening up the mass and admitting air thereto. (2.) The process of recovering gold and silver from their ores consisting in pulverising the ore, mixing a cyanide-solution therewith, subjecting the mass to a suction or vacuum to remove excess of the solution, loosening the mass to allow air to permeate therethrough, and finally leaching the mass and subjecting the dissolved metals to the action of metallic zinc. (3.) The process of recovering gold and silver from their ores consisting in pulverising the ore, mixing a cyanide-solution therewith, subjecting the mass to a suction or vacuum to remove excess of the solution, loosening the mass to allow air to permeate therethrough, and finally leaching the mass and subjecting the dissolved metals to the action of metallic zinc. (4.) The process of recovering gold and silver from their ores, said process consisting in mixing the pulverised ore with a cyanide-solution, then expelling the excess of solution to form a moist pulverulent mass, loose ing said mass, and exposing it to the circulation of air there-through.

(Specification, 2s. 9d.)

No. 23205.—25th July, 1907.—ALBERT LINCOLN JOHNSON, of Frisco Building, St. Louis, Missouri, United States of America, Civil Engineer. Improvement in corrugated bars.

Extract from Specification.—In the present construction each of two opposite sides or faces of the bar is provided with a series of alternate parallel ribs 1, and depressions or intervening spaces 2, arranged transversely but inclined at an angle to the axis of the bar.

[NOTE.—The above extract from the specification is inserted in place of the claims.]

(Specification, 7s. 3d. ; drawing, 1s.)

No. 23217.—27th July, 1907.—FRANCIS REGINALD SIMMONDS, of Napier, New Zealand, Flax-miller. Improved means for washing flax and other fibres.

Claims.—(1.) In means for washing flax and like fibres, an inclined water-trough, a number of pairs of rollers mounted transversely at intervals within the water-trough, an endless travelling band carried between the rollers of each pair of rollers and travelling up the incline of the trough, apertures formed at intervals in the length of such band, and a pair of squeezing-rollers mounted at the top end of the trough between which the band is carried, substantially as specified. (2.) The improved means for washing flax and like fibres substantially as described and explained, and as illustrated in the drawings.

(Specification, 2s. 6d. ; drawing, 1s.)

No. 23224.—26th July, 1907.—ADAIR-USHER PROCESS, LIMITED, of 82, 83, 84 Exploration Buildings, Commissioner Street, Johannesburg, Transvaal, a company registered under the Limited Liability Laws of the Transvaal (assignees of Charles Edwin Draper Usher, of 16A Overbeek Street, Troyeville, Johannesburg aforesaid, Assayer). Improvements in treating slimes and the like with solvent or washing liquid.

Claims.—(1.) In the wet treatment of slimes, the process which consists in passing liquid upwardly through a mass of slimes in such a manner and at such a rate as to maintain the slimes in a homogeneous state of suspension, and collecting the clear liquid above the slimes. (2.) In the wet treatment of slimes, the process which consists in passing liquid upwardly through a mass of slimes in such a manner and at such a rate as to maintain the slimes in a homogeneous state of suspension, collecting the clear liquid above the slimes, and returning the same for further percolation through the mass. (3.) Apparatus for treating slimes with liquids consisting of a vat, means for supplying liquid at a large number of points into the lower part of the vat, means for controlling the rate at which the liquid is supplied, and means for withdrawing clear liquid from the upper part of the vat. (4.) In apparatus as specified in claim 3, means for returning the clear liquid collected at the surface for further percolation through the slimes. (5.) Apparatus as specified in claims 3 or 4, wherein the liquid is supplied through a large number of orifices, which are directed tangentially and downwardly towards the bottom of the vat. (6.) In apparatus as specified in claim 5, means for feeding the slimes tangentially into the vat. (7.) The apparatus for treating slimes with solvent or wash water, substantially as described.

(Specification, 4s. 9d. ; drawing, 1s.)

No. 23227.—26th July, 1907.—FREDERICK PETERS, Tinsmith, and WILLIAM PETER SMITH, Gentleman, both of 507 Flinders Street, Melbourne, Victoria, Australia. Improved apparatus for cooling milk or alternatively for heating milk and other suitable fluids.

Claims.—(1.) In apparatus for cooling or alternatively for heating milk or other suitable fluids, in combination, a corrugated cylinder as A, in which is placed a supply-pipe as J, having at its end a spray-box as K, said spray-box being arranged in the top portion of said cylinder so that the cooling or heating medium discharging therefrom will flow down the interior of the corrugated cylinder A to an outlet pipe as M, and on its way affect the temperature of the metal cylinder A, substantially as and for the purposes set forth. (2.) The general combination and arrangement of the several parts to form a complete apparatus for cooling or alternatively for heating milk and other suitable liquids, substantially as described, and as illustrated on the sheet of drawings.

(Specification, 3s. ; drawing, 1s.)

No. 23231.—31st July, 1907.—GEORGE WILLIAM BELDAM, M.A., Cantab., of Boston Lodge, Ealing W., Middlesex, England, Engineer. An improved engine or machine packing.

Claims.—(1.) Improved engine or machine packing comprising a body of materials as specified, and a metal bar or bars, or strip or strips of white-metal or other suitable metal or metal mixture, of a section which causes it to become imbedded within the fabric of the body in such a manner that it is “keyed” in the body-material, one edge of the bar or bars, or strip or strips, lying on the working-face of the packing, substantially as set forth. (2.) Improved engine or machine packing comprising a body made of materials as specified, and a metal bar or bars, or strip or strips of white-metal or other suitable metal or metal mixture, and of con-