Nov. 23.] THE NEW ZEALAND GAZETTE. 2191

pounds which are saponifiable and either liquid or liquefiable at or below 150° centigrade. (2.) The method of forming a solution of paraphenetyl carbamide or its sweet homologues in oils, fats, or waxes, which consists in dissolving the said carbamides in the oil, fat, or wax by means of an acid soluble in the said oil, fat, or wax. (3.) The method of dissolving paraphenetyl carbamide or its sweet homologues in oils, fats, or waxes, which consists in combining the carbamide with an acid soluble in the oil, fat, or wax, and then adding this combination in the oil, fat, or wax. (4.) The method of dissolving paraphenetyl carbamide or its sweet homologues in oils, fats, or waxes, which consists in first acidifying the oil, fat, or wax by either adding an acid which is soluble therein, or by saponifying a portion of it and decomposing the soap, and then digesting the carbamide with the acidified oil, fat, or wax. (5.) The solution in oils, fats, or waxes of paraphenetyl carbamide of any of its sweet homologues and an acid soluble in the oil, fat, or wax.
(Specification, 4s. 3d.)

No. 12156.—10th November, 1899.—ATHANASIOUS TZAMIS, of 52, Stanley Street, Sydney, New South Wales, Tailor. An improved stove for heating irons, particularly irons used and employed by tailors, pressers, and clothing-manufacturers.

Claims.—(1.) The employment of a stove to heat irons as described and explained. (2.) The construction of F and GG in my stove with the space intervening to accommodate irons during the process of heating. (3.) The construction of the spaces between the raised black squares I, I, to hold irons in position whilst being heated. (4.) The employment of O and A, as described, as a safeguard against fire. (5.) The construction and use, as mentioned, of K to carry off smoke and fumes, and, when removed, to permit of access to the stove through J, by means of LL. (6.) The cover O, used as set out. (7.) The use of M to extinguish the fire expeditiously. (8.) The construction of a stove capable of doing what is claimed for my invention, at so small a cost, as explained.
(Specification, 3s. 6d.; drawings, 3s.)

No. 12161.—10th November, 1899.—RUSSELL AVERY, of Sausalito, Marin, California, United States of America, Miner, and HENRY COOK CAMPBELL, of 528, California Street, San Francisco aforesaid, Attorney-at-law. Rock-drill.

Claims.—(1.) In a rock-drill, a casing through which the drill is guided and movable, a fixed support or column, a sleeve slidable longitudinally upon the column, and means for securing it thereto, and a clamp fixed to the drill-carrying casing and turnable about the sleeve, to give direction to the drill, with means for securing it upon the sleeve and preserving alignment. (2.) In a rock-drill having a casing and a support therefor, a drill extending axially through the casing and guided thereby, a mechanism for intermittently turning the drill, and a cord connecting the mechanism with the belt of the hammer-wielder whereby the drill is raised and turned at each swing of the body in making the stroke. (3.) A rock-drill having an adjustably supported guide, a pawl-and-ratchet mechanism connected by a cord with the belt of the hammer-wielder, whereby the drill is intermittently turned between the hammer-strokes, and a mechanism by which the drill is automatically raised from the bottom of the hole after each stroke to allow it to turn.
(Specification, 6s.; drawings, 8s.)

No. 12163.—10th November, 1899.—JOHN SMITH, of Salt Lake City, Utah, United States of America, Inventor. Improvements in the treatment of gold- and silver-ores.

Claim.—The described treatment of ores, tailings, slimes, and other materials containing precious metals capable of extraction by the cyanide process, which consists in mixing the material, before the cyanide process is applied, with caustic lime, thereafter saturating or covering the mixture with water until all the acid present has combined with the lime, and then exposing the material to the action of atmospheric air, substantially as described.
(Specification, 5s.)

No. 12164.—10th November, 1899.—RUDOLF DIESEL, of No. 2, Schack-Strasse, Munich, Germany, Engineer. Improvements in or relating to internal-combustion engines.

Claims.—(1.) An internal-combustion engine for liquid and gaseous combustibles in which a mixture of air and combustible is compressed, and is artificially ignited near the inner dead point (inner end of the stroke), whereupon the combustion is regulated during its progress by the admission of a secondary combustible, whose quantity, time of injection, and the admission-period are regulated by the engine, as described. (2.) An internal-combustion engine for liquid and gaseous combustibles in which a mixture of air and combustible is so highly compressed that, although the compression-temperature does not attain the igniting-temperature of the mixture, yet the igniting-temperature of a second and more easily ignited combustible is reached or exceeded, so that the injection of the latter into the compressed mixture results in the ignition of this mixture. (3.) An internal-combustion engine for liquid and gaseous combustibles in which a mixture of air and combustible is so highly compressed that, although the compression-temperature does not attain the igniting-temperature of the mixture, yet the igniting-temperature of a second and more easily ignited combustible is reached or exceeded, so that the injection of the latter into the compressed mixture results in the ignition of this mixture, whereupon the combustion is regulated during its progress by the admission of the secondary combustible, whose quantity, time of injection, and admission-period are regulated by the engine, as described. (4.) An internal-combustion engine for liquid and gaseous combustibles in which pure air is so highly compressed that the temperature resulting from its compression is higher than the igniting-temperature of the combustible to be used, whereupon the supply of combustible commences near the inner dead point (inner end of the stroke), and the combustion resulting from the ignition is regulated during its progress by regulating the quantity, the time of injection, and the admission-period of the combustible by means of the engine mechanism, as described. (5.) An internal-combustion engine for liquid and gaseous combustibles according to claims 1, 2, 3, and 4, in which the supply of the secondary combustible is effected by placing the compression-chamber of the engine into communication with a vessel L for air or gaseous combustibles (Fig. 3), which pass over, under excess pressure, into the compression-chambers of the engine when the nozzle-plug n is opened, and in doing so carry along with them the liquid combustibles which have been mixed with them on the way. (6.) An internal-combustion engine for liquid and gaseous combustibles according to claims 1, 2, 3, and 4, in which the regulation of the quantity, the time of injection, and the admission-period of the combustible is effected by a liquid-combustible pump, with valves, of which one leads to the engine and the other to the reservoir A, the latter valve being kept closed for a longer or shorter time by a spring-rod T, which ascends and descends with the plunger K, with interposition of a wedge r, which is actuated by the governor, as described. (7.) In an internal-combustion engine for liquid and gaseous combustibles according to claims 1, 2, 3, and 4, the regulation of the quantity, the time of injection, and the admission-period of the combustible by varying the pressure in the vessel L (Fig. 3) by means of an overflow-valve actuated by the governor, as described. (8.) In an internal-combustion engine for liquid and gaseous combustibles according to claims 1, 2, 3, and 4, the automatic generation of the compressed air for the starting and the introduction of the combustible by means of the main piston of the engine, as described. (9.) An internal-combustion engine for liquid and gaseous combustibles according to claims 1, 2, 3, and 4, in which the starting is effected by working the engine for a short time as a compressed-air engine, as described. (10.) An internal-combustion engine constructed, arranged, and operating as described with reference to and shown in the drawings.
(Specification, 10s.; drawings, £1 8s.)

No. 12176.—15th November, 1899.—WILLIAM GEORGE MUNT and EDWARD MUNT, of St. John’s Hill, Battersea, Surrey, England, Pianoforte-manufacturers. Improvements in pianofortes.

Claims.—In a pianoforte in which extra strings are provided adapted to give a double sound, or diapason tone, when desired: (1.) The construction or arrangement of the bridges, and parts co-operating therewith, substantially as and for the purpose set forth. (2.) The constructions and arrangements of parts for supporting and adjusting the extra or diapason strings relatively to the usual strings, whereby the strings producing the extra tone or sound are carried over the belly-bridge without necessitating injurious cutting or weakening of that bridge, substantially as and for the purpose set forth and shown by the drawings. (3.) The construction or arrangement of the parts of the bridges for the extra strings for the diapason tone in combination with the means for obtaining an up-bearing, or down-pull, or draught on the