SEPT. 20.] THE NEW ZEALAND GAZETTE. 2493

the electric motor is broken; but in the meantime the magnetic clutch has become dead, so that upon the breaking of the motor-circuit there is practically no load upon the motor, and the sparking at the switch-electrodes is thereby minimised to a marked degree. The invention also comprises certain improvements in the method of establishing the circuit through said clutch upon the depression of one of the special keys, and also includes certain improvements connected with the circuit-establishing devices controlled by said special keys.

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

(Specification, £1 1s.; drawings, 3s.)

No. 21626.—13th August, 1906.—FREDERICK ARTHU-LAKIN, of Napier, Hawke’s Bay, New Zealand, Travelling Machinery Expert. Improved means for securing fencing wires to standards and droppers.

Claims.—(1.) For the purpose indicated, a staple having a loop for the reception of a fencing-wire, substantially as set forth. (2.) A tool for bending the ends of staples, consisting of a handle, a head integral with the handle and having a gap, a fulcrum upon one side of the gap, and a lug upon the other side of the gap, substantially as set forth. (3.) In a tool constructed as described in claim 2, stems upon the fulcrum and lug adapted to pass into holes provided in the head, and split pins for retaining the fulcrum and lug in position, substantially as set forth.

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

No. 21632.—29th September, 1905.—GEORGE HERBERT EARP-THOMAS, of 32 Manners Street, Wellington, New Zealand, Doctor of Dental Surgery, temporarily residing at 400 Bloor Street West, Toronto, Ontario, Canada. Process of preparing and growing and distributing organisms which fix or gather atmospheric nitrogen.

[NOTE.—This is an application under section 106 of the Act, the date given being the official date of the application in the United States of America.]

Extract from Specification.—The process essentially consists of growing the bacteria in corked and sealed vessels by a nitrogen-free medium for a given period until the organisms reach a stage of exalted virulence. The growth being very profuse in the medium permits immediate and direct inoculation of the seed or soil.

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

(Specification, 11s.)

No. 21633.—14th August, 1906.—ERNEST ROBERT GODWARD, of Invercargill, New Zealand, Engineer. Improved means for preventing vibration of gas-burners and the like.

Extract from Specification.—The means devised consist of a hollow elastic ball of any approved shape, that is interposed between the burner and the bracket or other fittings, and is connected to them by means of tubes passing through the ball and telescoping into one another within the ball. A flexible pneumatic connection is thus provided, which will prevent any vibration or concussion given the fitting being communicated to the burner.

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

(Specification, 2s. 9d.; drawing, 1s.)

No. 21635.—15th August, 1906.—JOHN RANDOLPH PARKS, of 1927 Second Avenue, Spokane, Washington, United States of America, Mining Engineer. Improvements in machines and processes of treating ores.

Extract from Specification.—One of the principal objects of this invention is to enable the valuable particles of metals contained in the most finely pulverised ore to be intermixed with sufficient liquid containing the desired ingredients to form a slime, and then economically extracted by the simultaneous application of air, a current of electricity, and sufficient agitation to maintain the particles of minerals in suspension during such treatment. In the known process the ore is crushed in such a manner as to produce as few slimes as possible, the object being to remove all valuable minerals from the slimes; while in the described process the ore is crushed and treated in such a manner as to collect the greater proportion of the valuable minerals in the slimes for the electro-chemical treatment—separating from the slimes only the clean, coarse particles of mineral which are not amenable to economical treatment by cyanide—for subsequent recovery of their values by smelting or any other process.

By this means all particles of precious metal-bearing minerals occurring in the ore, and which are amenable to the cyanide process, are thus prepared and left in the slimes for their most economic extraction by means of the further steps of the process described.

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

(Specification, £1 17s.; drawings, 8s.)

No. 21637.—23rd February, 1906.—CHARLES ROBERT MAYO, A.M.I.M.E., of 9 Mostyn Avenue, Wembley, Middlesex, England, Mechanical Engineer. Improvements in spark-arresters.

[NOTE.—This is an application under section 106 of the Act, the date given being the official date of the application in Great Britain.]

Claims.—(1.) The combination and arrangement in a smoke-box of a cage made in halves linked or articulated together, screens each hinged near one side of the smoke-box, and each having hinged or articulated to it the upper part of one of the half cages, and means for supporting the cage and screens in position for use, the arrangement being such that the cage and screens can be raised together, so as to readily afford access to the fire-tubes. (2.) In a smoke-box the combination with a short blast-pipe of a cage which encloses a space around and above the outlet of the blast-pipe, and the tube-plate side of which is solid so as to form a spark-pulverising deflector which may have wing-like side extensions, the remainder of the cage being adapted to allow the passage of products of combustion but to arrest sparks, substantially as described. (3.) The combination and arrangement in a smoke-box of a cage such as referred to in claim 2, made in halves, linked or articulated together at their lower ends, screens each hinged near one side of the smoke-box, and each having hinged or articulated to it the upper part of one of the half cages, means for supporting the cage and screens in position for use, and a dead plate arranged across the smoke-box next the tube-plate, substantially as described. (4.) Spark-arresters according to claim 1 or claim 3, wherein the screens are constructed of metal plate having there through holes, the edges of which are upwardly flanged to facilitate the upward flow of the gases on their way to the chimney. (5.) Spark-arresters of the kind referred to in claim 1 or claim 3, wherein the screens are constructed as described with reference to and illustrated in Figs. 6 and 7, or Figs. 8 and 9, or Figs. 10 and 11, or Figs. 12 and 13. (6.) The improved spark-arrester described with reference to and illustrated in Figs. 1 to 3 inclusive of the drawings, or modified as described with reference to Fig. 14 thereof.

(Specification, 4s. 6d.; drawings, 2s.)

No. 21638.—15th August, 1906.—RICHARD PIERCE, of Rowan, Stratford, Taranaki, New Zealand, Farmer. An improved grip for holding fencing-wires and the like.

Extract from Specification.—The grip comprises two members, one of which has a cam of ordinary construction adapted to force a wire into a V shaped groove provided upon the other member. The ends of the members are provided with links through which the ring of a chain is passed. This construction is well known for drawing the members together.

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

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

No. 21643.—16th August, 1906.—JOHANN FRIEDRICH LINKE, of Yellangip, Victoria, Australia, Blacksmith, and MARTIN SAMUEL NOACK, of Hopevale, Victoria, Australia, Farmer. Improvements in disc-ploughs and the like cultivators.

Claims.—(1.) In disc-ploughs and the like cultivators, in combination, a detachable frame, lugged blocks, a curved crank-axle, a draft-pressure guide composed of a lever draft-chain, an adjustable swingletree connected to the lever, one end of said swingletree being attached to the frame, the other end being connected to a link-rod, an adjustable swing-bar, means for connecting the swing-bar with a second link-rod, and means for attaching the end of the second link-rod to the frame, substantially as and for the purposes described. (2.) In disc-ploughs and the like cultivators, in combination, a tumbler constructed of outwardly curved metal plates connected at the rear and open at the front, means for securing tumbler to spindle, means for attaching the spindle embracing a lug-plate that fits on and grips the side bars, a spindle bearing an adjustable split pressure-ring, a clamping link, a detachable plate, countersunk cups to