Claims. —(1.) A process for the treatment of complex sulphide ores comprising the roasting of the ore with the object of getting it as far as possible into the form of oxides, and the subsequent reduction of the oxides with carbonaceous material, whereby the zinc is distilled off and the lead reduced to the metallic form, substantially in the manner described. (2.) A process for the treatment of complex sulphide ores comprising roasting the ore, mixing it with carbonaceous material in the furnace for completing the roast, mixing the roasted product with a further portion of carbonaceous material, and treating the mixture in a distilling-furnace, substantially as described. (3.) A process for the treatment of complex sulphide ores comprising roasting the ore with the object of getting it as far as possible into the form of oxides, mixing the roasted product with carbonaceous material, and forming it into briquettes, and treating the briquettes in a distilling-furnace, substantially as described.

(Specification, 4s. 3d.)

No. 12935.—31st August, 1900.—GEORGE WEIR, of 23, Eagle Chambers, King William Street, Adelaide, South Australia, Engineer. Improvements in and relating to ore-dressing machines.

Claims. —(1.) In an inclined ore-dressing table, in combination, a series of longitudinal riffles of equal length extending portion of the distance between the head and the tail of the table, diagonal stops at the ends of such riffles, and transverse riffles between such stops and the upper and lower edges of the table, substantially as described and for the purpose set forth. (2.) The combination in an ore-dressing table of a working part fitted with longitudinal riffles of equal length and a raised portion or stop at one or both ends of said longitudinal riffles, and the whole operated by the specific mechanism described, all substantially as and for the purpose set forth. (3.) An inclined ore-dressing table having a movement whereby the inertia possessed by the particles of mineral under treatment is sufficient to carry them towards the tail of the table, said table being provided with a number of riffles extending longitudinally a portion of the distance between the head and the tail, said riffles being of equal length, the table having one or more raised stops at the ends of such riffles, together with transverse riffles whereby clear water is distributed and delivered on to the working portion of the table for the purpose specified, the excess water compelled to flow off through various channels, and the mineral and gangue guided to predetermined discharge-points, substantially as described. (4.) An inclined ore-dressing table having a differential movement whereby the particles of mineral that are under treatment carry themselves toward the tail of the table, said table being provided with a number of riffles extending longitudinally a portion of the distance between the head and the tail, said riffles being of equal length, the table having one or more raised portions with grooves cut therein whereby clear water is distributed and delivered on to the working portion of the table for the purpose specified, the excess water, together with the very lightest of the gangue, being compelled to distribute itself and flow off through several grooves or channels, and the mineral and gangue guided to fixed discharge-points, substantially as described. (5.) The combination of a diagonally inclined ore-dressing table carried on radius-bars having an upward or downward movement on the forward stroke, said table having a number of longitudinal riffles of equal length extending portion of the distance between the head and the tail of the table, the table being provided with one or more raised stops at the end of such riffles, together with transverse riffles, and means for imparting to the table a longitudinal differential reciprocating movement, comprising a cranked shaft, connecting-rod, slipper-block sliding against the face of a stationary guide, and radius-bar, one end of the radius-bar engaging the slipper-block while the other end engages an adjusting block secured to the movable bridle which is attached to head of table, substantially as described. (6.) The combination of a diagonally inclined ore-dressing table, carried on radius-bars, having an upward or downward movement on the forward stroke, said table having a number of longitudinal riffles of equal length extending a portion of the distance between the head and the tail of the table, the table being provided with one or more raised portions with grooves cut therein, and means for imparting to the table a longitudinal differential reciprocating movement, comprising a cranked shaft, connecting-rod, slipper-block sliding against the face of a stationary guide, and radius-bar, one end of the radius-bar engaging the slipper-block while the other end engages an adjusting block secured to the movable bridle which is attached to head of table, substantially as described. (7.) The combination of a diagonally inclined ore-dressing table, carried on radius-bars, having an upward and downward movement, said table having a series of longitudinal riffles of equal length, the table being provided with one or more raised stops or raised portions situated at the extremities of the longitudinal riffles, means for feeding the material to the upper portion of the table's head, means for discharging water on the raised portion at the upper edge of the table, and an operating mechanism comprising a cranked shaft, connecting-rod, slipper-block and guide, and radius-bar, one end of the radius-bar engaging the slipper-block while the other end engages an adjusting block secured to the movable bridle which is attached to the head of the table, substantially as described.

(Specification, 7s. 6d.; drawings, £1 1s.)

No. 12946.—3rd September, 1900.—GEORGE SMITH CASE FORD, of Harriett Street, Thorndon, Wellington, New Zealand, Government Messenger. Improvements in glazing or polishing shirt-fronts, collars, cuffs, and other articles.

Claims. —(1.) My improvements in glazing or polishing shirts, collars, and the like, consisting of applying a composition of boric acid and benzoic acid, after the article has been starched and ironed in the usual way, and finally burnishing the article with a suitable instrument, substantially as described. (2.) The use of a composition consisting of boric acid and benzoic acid substantially as and for the purposes described. (3.) The instrument for the purposes set forth, substantially as described, and as illustrated by drawings.

(Specification, 1s. 6d.; drawings, 3s.)

No. 12961.—6th September, 1900.—JAMES WILLIAM FAULKNER, of Dunedin, New Zealand, Mechanical Engineer and Ironworker. Improvement in revolving screens, especially for gold-saving dredges.

Claims. —(1.) In revolving screens, especially for gold-dredging, the combination of the revolving screen with internal obstructions that may also be utilised in the connection of the plates of the screen, such as D, E, E¹, E², or may form the obstructions needed only, such as D¹, E, E¹, E², all substantially as illustrated in the drawing and described. (2.) In revolving screens, in combination a revolving screen A, working at the usual angle of inclination in the usual way, with obstructions D, E, E¹, or E², forming also part of the screen, or similar obstructions D¹, placed where considered necessary, either alone or combined with E, E¹, E², as required, with the usual shoots and tables, all substantially as shown and described, and for the purposes set forth. (3.) In combination, a screen A, with circular obstructing plates and angles D, E, and grinding balls or lumps J, substantially as shown and described, and for the purposes set forth.

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

No. 12963.—8th September, 1900.—EDWARD KERSEY COOPER, of Thames, Auckland, New Zealand, Gentleman. Improvements in or relating to ore-crushing and gold-saving batteries for the purpose of saving fine and float gold.

Claims. —(1.) In an ore-crushing and gold-saving battery, a roller suitably fixed to the table at the sides of the ripple at the end of the plate, and connected by belting to the cam-shaft or other suitable form of power, so as to rotate in said ripple for the purpose set forth, substantially as described and illustrated. (2.) In an ore-crushing and gold-saving battery, in combination, a splashboard fixed in front of the ripple, a roller suitably fixed to the table at the sides of the ripple at the end of the plate, and connected by belting to the cam-shaft or other suitable form of power, so as to rotate in said ripple, all for the purpose set forth, substantially as described and illustrated.

(Specification, 2s. 6d.; drawings, 3s.)

No. 12964.—11th September, 1900.—HECTOR MARSHALL, of 227, Bay Street, Port Melbourne, Victoria, Boot and Shoe Architect. An improved attachment for boot- and shoe-sewing machine.

Claims. —(1.) An improved attachment for boot- and shoe-sewing machines consisting of a welt-strip guide affixed to or integral with the rest situated between the needle and the awl, all as and for the purposes described, and as illustrated in the drawings. (2.) An improved attachment for boot-and shoe-sewing machines, a welt-strip guide consisting of a holder, an extension thereon having a needle-hole therethrough, a thrust step or shoulder, and a welt strip guiding-hole formed by a bridge, an adjusting piece or pieces in the said extension, all as and for the purposes described, and as illustrated in the drawings. (3.) An improved attachment for boot- and shoe-sewing machines consisting of a welt-strip guide forming a rest, and having a thrust step or shoulder thereon, and a welt-strip guiding-hole regulated in width by adjusting-pieces, all as and for the purposes described, and as illustrated in the drawings.

(Specification, 4s. 6d.; drawings, 5s. 6d.)