998
THE NEW ZEALAND GAZETTE.
[No. 34

sugar or sugar-solutions. Another object is to produce a new cleansing-body, which, when mixed with impure sugar, will absorb or seize the impurities, including the invert sugar, and, when separated from the mass under treatment, will retain the absorbed or seized impurities. Prior to our invention, efforts had been made to wash or cleanse a mass containing sugar, usually in the form of sugar-crystals, by treating the same with a saturated solution of sugar, or with alcohol; but the saturated solution of sugar was only a non-solvent of the sugar when its full strength was maintained, and its use, in any event, resulted only in the transfer of a certain proportion of impurities from one body containing sugar to another of nearly equal quantity. The process of treating with alcohol was difficult to practise, owing to the volatile character of the material, and the large losses necessarily incident to its use. Moreover, the percentage of refined sugar recovered or produced in both of the above attempts was unsatisfactory both in amount and in quality of product. We are also aware that it has been proposed to wash a mass containing sugar-crystals with a liquid consisting of a mixture of water and paraffine-oil; but the employment of paraffine-oil in such process was only for the purpose of diminishing the amount of water used, and so lessening the dissolving effect upon the sugar-crystals, and the mixture had little or no effect upon the earthy or metallic salts, or the invert sugar, in the mass under treatment. We are further aware of the common practice of filtration of sugar-liquor or dissolved sugar, containing impurities, through a mass of bone-black or other comminuted material for the special purpose of removing colouring-matter, and which process incidentally partially removes other impurities; but it does not act to remove the salts or invert sugar, which remains and interferes with final crystallization, and forms molasses therein. The object of our invention is to avoid these tedious, expensive, and imperfect processes. Our process is practised by mixing the impure sugar with a defecating or cleansing liquid having greater affinity or absorbent properties for the earthy or metallic salts, and for the invert sugar and caramel, ordinarily found associated with sugar or sugar-bearing bodies, than the adherence of such substances to the sugar itself, and subsequently separating the sugar from the said cleanser containing the absorbed impurities.. For this purpose we have devised, and employ, cleansing-materials which can be made from members of a class of bodies all having certain common characteristics as set forth.

[NOTE.—The number and length of the claims in this case preclude them from being printed, and the foregoing extract from the descriptive part of the specification is inserted instead.]

(Specification, 14s.)

No. 14752.—17th April, 1902.—ROBERT WLADISLAS DE MONTALK, of Queen Street, Auckland, New Zealand, Architect. An improved method of and means for constructing fireproof floors and ceilings.

Claims.—(1.) In the construction of fireproof floors and ceilings, the use of hollow tiles, made of any suitable material, and with sides shaped so as to enclose a space of greater width at the top than at the bottom, an opening in the bottom of such tile to allow of the tile being placed upon the building-joists, flanges upon the outer faces of the tile, and a covering adapted to fit and close the bottom opening of the tile as specified. (2.) In the construction of fireproof floors and ceilings, a tile shaped approximately as shown in Figs. 5 and 6, such tile being adapted to fit against the side of a girder, and, in conjunction with a corresponding tile upon the other side of the girder, to encircle the bottom thereof, such tiles being formed with holes therein through which the building-joists are passed, and with or without holes for the admission of insulating-material as set forth. (3.) The improved method of constructing fireproof floors and ceilings as described and explained, and as illustrated in the sheet of drawings.

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

No. 14753.—17th April, 1902.—LOUIS CARNEGY AULDJO, of Equitable Building, George Street, Sydney, New South Wales, Consulting Engineer. Improvements in air or gas compressors.

Claims.—(1.) In air or gas compressors, the combination of the piston b with the passages k and k' and ports 1, substantially as described and shown on the drawings and for the purpose set forth. (2.) In air or gas compressors, the combination of the passages k and k' with the ports 1, substantially as and for the purpose set forth. (3.) In air or gas compressors, the combination of the piston b with the valve f', the passages k and k' and ports 1, substantially as and for the purpose set forth. (4.) In air or gas compressors, the combination of the piston b with the valves e and e', passages g and g', valves f and f', passages k and k',

and ports 1; substantially as and for the purpose set forth. (5.) An air or gas compressor having both ends of the cylinder connected, substantially as and for the purpose set forth. (6.) The air or gas compressor as a whole, substantially as described and shown on the drawings, and for the purpose set forth.

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

No. 14757.—17th April, 1902.—ADAM McCRACKEN, of Greensborough, Victoria, Pastoralist. An improved process of manufacturing a safety explosive.

Claims.—(1.) In the manufacture of a safety explosive, the combination of picric acid and glycerine, and the neutralisation thereof by the addition of carbonate of ammonia, substantially as described. (2.) In the manufacture of a safety explosive, the combination of picric acid and glycerine, and the neutralisation thereof by the addition of carbonate of ammonia, with the further addition of infusorial earth, and so producing the picrated mixture, substantially as described. (3.) In the manufacture of a safety explosive, the combination of picric acid and glycerine, and the neutralisation thereof by the addition of carbonate of ammonia, with the further addition of infusorial earth, and the production of the picrated mixture with the still further addition of nitrate of potash, substantially as described. (4.) In the manufacture of a safety explosive, the combination, method, or process described, comprising the association of picric acid and glycerine, the neutralisation thereof by the addition of carbonate of ammonia, the further addition of infusorial earth, and the production of the picrated mixture, to which is added nitrate of potash, together with a small percentage of sulphur, after which the drying operation is carried out, substantially as described, as and for the purpose set forth.

(Specification, 2s.)

No. 14758.—17th April, 1902.—HENRY GRASS, of Flowerdale, near Broadford, Victoria, Grazier. An improved dropper for pasty material such as the phosphorized pollard used in rabbit-destruction.

Claims.—(1.) In a tool of the class indicated, a reservoir having a nozzle, and having a movable foot having an attachment for the closing and opening of said nozzle, substantially as set forth. (2.) In a tool of the class indicated, a spring-actuated foot substantially as and for the purposes set forth. (3.) In a tool of the class indicated, a nozzle having an extension as B⁴, and openings as at B¹ and B⁵, substantially as and for the purposes set forth. (4.) In a tool of the class indicated, a plug as D⁴ adapted to operate as set forth. (5.) In a tool of the class indicated, the combination and arrangement of all the parts shown in Fig. 3 of the drawings. (6.) In a tool of the class indicated, having a reservoir with piston, auxiliary means for pressing down the said piston, substantially as set forth. (7.) In a tool of the class indicated, having a reservoir with piston, auxiliary adjustable means for pressing down the said piston, substantially as set forth. (8.) In a tool of the class indicated, a reservoir having a piston and piston-rod in combination with a cylinder enclosing a spring, and an adjustable finger as I arranged relatively to said spring, substantially as set forth. (9.) The general combination as a whole of the parts A to K described, substantially as and for the purposes set forth.

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

No. 14759.—17th April, 1902.—ALLGEMEINE BELEUCHTUNGS UND HEIZ - INDUSTRIE ACTIEN - GESELLSCHAFT, of Behrenstrasse, 67, Berlin W., Germany, Manufacturers (assignees of Paul Lucas, of Neue Winterfeldstrasse, 31, Schoneberg, near Berlin aforesaid, Engineer). Improvements in incandescent gas-lamps.

Claims.—(1.) A method of producing high illuminating-power in incandescent gas-lamps with normal gas-pressure, in which, owing to the suctional effect of a lengthened draught-tube, the burner is always supplied through the mixing-tube of the lamp with a mixture of air and gas containing a higher proportion of gas than is required to produce pure oxyhydrogen with coal-gas more than 6 : 1, for the purpose set forth. (2.) A modification of the method described in claim 1, in which the surplus of air sucked in through the burner-tube is correspondingly reduced, in some cases to below the proportion of 6 : 1, by cooling the burner-head by means of air supplied from outside the head, and subsequently also serving for combustion. (3.) An incandescent gas-lamp working with normal pressure, having a draught - tube of more than ordinary width and length combined, with a burner-tube widened to receive a surplus of air beyond the quantity of