Nov. 14.] THE NEW ZEALAND GAZETTE. 3363

rim of any traction-engine (or suitable vehicle or wagon) wheel is alterable to embody this invention. To provide oscillatable bearers, mounted end to end upon the wheel-rim in one or a plurality of (preferably two) circumferential series, and arranged between the flanges around the rim.

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

(Specification, 4s. 6d. ; drawing, 1s.)

No. 23242.—1st August, 1907.—IGNACY MOSCICKI, of Gambach, near Freiburg, Switzerland, Electrician. Improved electrical apparatus for the production of nitro-oxides.

Claims.—(1.) Apparatus for the electrical production of nitro-oxides, having a rotating arc flame in which, for the purpose of obtaining a higher concentration of nitro-oxides without reduction of the exploitation, a cooling of the gases to prevent the decomposition of nitro-oxides is effected or partly effected by their momentary contact with cooled metallic electrodes constructed for the formation of reaction products thereof, and one of which electrodes has educt channels in immediate proximity to the arc flame, substantially as described. (2.) Apparatus as set forth in the preceding claim, in which are cooled metallic electrodes within a strong magnetic field, one of which is set oppositely to the other and intersects said magnetic field perpendicularly, so that the arc flame maintained between said electrodes will rotate over the face of said other electrode while clinging thereto, substantially as described. (3.) Apparatus constructed of the parts or integers for the purposes set forth, substantially as described and explained, and as illustrated in the drawings.

(Specification, 5s. 6d. ; drawing, 1s.)

No. 23463.—14th September, 1907.—WILLIAM PATERSON McINDOE, of Invercargill, New Zealand, Flax-miller. Improved means for use in dressing or trueing-up the surfaces of the beaters of flax-strippers.

Claims.—(1.) Means for dressing the beater-bars of flax-strippers, the same consisting of a grinding-block secured within a bar, such bar being loosely articulated at one end upon a rod mounted in a frame and being supported at its other end upon a cross-piece adjustably secured to the frame, such frame being adapted to rest upon the stripper so that the grinding-block will engage with the beaters thereof as they rotate beneath it, substantially as specified. (2.) Means for dressing the beater-bars of flax-strippers, the same comprising a frame adapted to rest upon the stripper, a rod extending transversely across one end of the frame, a cross-piece extending across the other end of the frame and carried on springs surrounding vertical bolts passing freely through the cross-piece, a bar loosely articulated at one of its ends upon the rod with its free end resting upon the cross-piece, and a grinding-block fixed within such bar, substantially as specified.

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

No. 23517.—21st September, 1907.—RANDOLPH MEREDITH KEMP, of Durham Ox, near Pyramid Hill, Gunbower, Victoria, Australia, Farmer. An improved subsoil cultivator for attachment behind ploughs.

Extract from Specification.—My special cultivator is capable of a rapid backward and forward adjustment along the plough-frame or an extension therefrom, a quick up and down adjustment, its bottom end is easily inclined backwardly or forwardly, the width of the earth-passage between the prongs can be increased or diminished, and the said earth-passage permits the disturbed earth to pass freely between the said prongs. In a modification, my cultivator is so constructed that it lifts and rises above an obstruction when it meets it, the cultivator prong-points are behind a pivot-pin situated above them, the prong-points are raised or lowered by raising or lowering a weight-lever, the position of which can be adjusted by a catch.

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

(Specification, 10s. ; drawing, 1s.)

No. 23518.—21st September, 1907.—FREDERICK GARDNER COTTRELL, Ph.D., of 1512 Hawthorne Terrace, Berkeley, Alameda, California, United States of America, Assistant Professor of Physical Chemistry in the University of California. Manufacture of sulphuric acid.

Claim.—The improvement in the manufacture of sulphuric acid by the contact method, which consists in producing in the contact gases, after coming from the contact mass, non-gaseous particles of sulphuric acid representing substantially the whole of the sulphur trioxide formed in said gases by the contact mass by suitably varying the humidity and temperature of said gases, and then in separating and collecting said particles.

(Specification, 3s.)

No. 23527.—27th September, 1907.—GEORGE LESTER BURTON, of Napier, New Zealand, Acetylene Expert. An improved acetylene-generator.

Claims.—(1.) In acetylene-generators, the combination with a water-tank and a gas-holder fitting therein of a generating-chamber extending downwards from the top of the holder and the bottom end of which is in communication with the space enclosed by the water-tank while the top end is in connection with the upper end of the holder, and a carbide-holder composed of a cylinder fitting within the generating-chamber and formed with an open space extending throughout its length, and with horizontal trays at intervals in its height and provided with a perforated cover extending over the open space, substantially as and for the purposes specified. (2.) The acetylene-generator, substantially as described and explained, and as illustrated in the drawings.

(Specification, 4s. 3d. ; drawing, 1s.)

No. 23535.—1st October, 1907.—HENRY STEPHENSON, of Edenham, Patangata, Hawke’s Bay, New Zealand, Fencer. Improvements in and relating to fencing-standards.

Claims.—(1.) The fencing-standard constructed, arranged, and operated substantially as specified and illustrated in the drawing. (2.) A fencing-standard in combination with means for securing it to the ground, said means comprising a wire loop passing through a hole in the standard and receiving a peg, a second peg being arranged transversely across and above said peg, substantially as specified and illustrated.

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

No. 23538.—1st October, 1907.—THOMAS FREDERICK McGARVA, of Christchurch, New Zealand, Carpenter. An improved baby-cradle.

Claims.—(1.) The combination with a cradle, supported so as to be free to swing, of spring-actuated mechanism reciprocally actuating the lower end of a pivoted lever, the upper end of which is connected to the cradle, substantially as and for the purpose specified. (2.) In combination, a cradle supported so as to be free to swing, spring-actuated mechanism mounted beneath and rotating a disc wheel, a vertically arranged lever pivoted about midway in its height to a fixed point, and connected at its upper end to the cradle, and a connecting-rod pivoted at one end to the lower end of the lever, and eccentrically connected at the other to the disc wheel of the spring mechanism, substantially as and for the purposes specified. (3.) In means for the purpose indicated, and embodying a rocking-lever reciprocated by spring-actuated mechanism, the use of helical spring connections between the upper end of the rocking-lever and the cradle, substantially as and for the purpose specified. (4.) In means for the purpose indicated, and embodying a pivoted rocking-lever connected to the cradle at its upper end, and to spring-actuated mechanism at its lower end, by means of a connecting-rod eccentrically connected to such mechanism, forming the connecting-rod with a weighted extension beyond its point of connection with the rocking-lever, substantially as and for the purpose specified. (5.) The general arrangement, construction, and combination of parts in my improved baby-cradle, substantially as described and explained, as illustrated in the drawings, and for the several purposes set forth.

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