proving bleaching-liquor, he had in, one of them suggested to Mr. Tennant that he would probably attain his end by keeping the lime-water constantly agitated. Mr. Tennant afterwards informed the witness that this method had succeeded. These conversations took place in the year 1796; and Mr. Tennant obtained his patent in 1798. Upon this evidence the plaintiff was nonsuited, Mine of Zinc Ore, A mine of zinc ore, of very superior quality, has lately been discovered at Perranzabular, in Cornwall; it consists of 47 parts in 100 of zinc, when reduced to a metallic state, whereas the calx of iron contained in it is only 4 in 100, List of Patents for Inventions, &c. (Continued from Page 80.) THOMAS BARNETT, of East-street, Lambeth, Surrey, Mathematical Instrument - maker; for an invention whereby a requisite quantity of air will introduce itself into any vessel containing fluids, or a superabundant quantity of air therein, discharge itself so as to preserve the fluid in a constant state for use, Dated November 6, 1802. ROBERT WALKER, of Union-street, St. Mary-le-bone, Middlesex; for dining-tables, upon an entire new construction. Dated November 6, 1802. HENRY SMITH, Lieutenant in his Majesty's Royal Navy; for an improved vessel or barrel for the more safe and expeditious carriage and conveyance of gunpowder. Dated November 13, 1802. SIMON HUGUENIN, of Brook-street, Holborn, Mid dlesex; for a machine for accelerating motion with little friction, to be called the Universal Lever. Dated November 13, 1802. THOMAS MARTIN, of Brook-street, near Brentwood, Essex, Saddler; for a method of applying fire, by means of certain machinery, for the purpose of heating liquors, and applying such liquors when heated to various useful purposes. Dated November 20, 1802. THOMAS DAWSON, of James-street, Long Acre, Middlesex, Tin Plate-worker; for a lamp or lanthorn, upon an improved construction. Dated November 25, 1802. WILLIAM DOBSON, of St. Clement's Danes, Middlesex, Hardwareman; for machinery for the purpose of chasing away flies and venomous insects. Dated November 25, 1802. MARC ISAMBARD BRUNEL, of Gerard-street, Soho, Middlesex, Gentleman; for trimmings or borders of muslin, lawn, or cambric. Dated November 27, 1802. JAMES ROBERTS, of Portsea, Hants, Mechanic, and EDWARD BRINE, of the same place, Coppersmith; för machinery for the purpose of dragging or locking the wheels of carriages of every description, and for instantaneously disengaging the horses therefrom. Dated November 29, 1802, ALEXANDER ROSs, of Bishopsgate - street, London, Perfumer; for gentlemen's peruqes or wigs. Dated November 29, 1802.. DANIEL CRAANER, a native of Holland, but now residing in the city of London Merchant; for a method of making, verdigris in lumps or powder with ingredients the produce of Great Britain, which will not only answer every purpose of foreign verdigris, but can be used as a water-colour upon paper, &c. Dated November 30, 1802, Specification of the Patent granted to GEORGE HODSON, of the City of Chester, Ash-manufacturer; for a new or improved Process or Processes for obtaining, preparing, or manufacturing, the Fossil or Mineral Alkali from various Substances. Dated February 27, 1802. With a Plate. To all to whom these presents shall come, &c. Now KNOW YE, that I the said George Hodson, in compliance with the said proviso, do hereby declare that the nature of my said invention, and the manner in which the same is to be performed, is particularly described and ascertained in the following description, and in the drawing or section hereunto annexed, (see Plate IX. Fig. 2.); that is to say I obtain, prepare, or manufacture, the fossil or mineral alkali from kelp, soda, the caput mortuums, produced from the use of salt-rock, common salt, brine, VOL. II. SECOND SERIES. sea sea-water, from black ashes, nitron salts, produced from soapers' lye, from salt-rock, common salt, brine, seawater, and soapers' spent-lye, in the following manner. In order to obtain the mineral alkali from the salt contained in kelp, I take about two hundred and a half weight of kelp, previously bruised or ground small, one hundred and a half weight of soapers' waste-ashes, and one hundred weight of tanners' waste-bark, and mix them well together. I then pour over them water, or soapers' spent-lye, sufficient to moisten the whole mass. In this state they are thrown into a reverberating-furnace, of the construction represented in the annexed drawing or section, or of any other construction, properly adapted to make the frame reverberate upon the materials which are thrown in by the entrance E, and spread regularly on the bottom of the furnace by means of an iron rake A, or any similar instrument. At intervals of about ten minutes the whole mass should be stirred, and the several parts thereof successively brought to the surface, that they may receive more strongly the action of the reverberatingflame at every such interval two or three spades full of tanners' waste-bark, and two or three gallons of water, are thrown into the furnace, on the top of the materials, and regularly mixed with them. I pursue this process until about ten buckets of water and about three hundred weight of tanners' bark are introduced into the furnace. By this means the materials are preserved in a state resembling garden-soil. Throughout the whole operation a strong and regular heat is kept up, and in about four hours the materials will begin to flux on the top, and in five or six hours the whole mass will be fluxed. In this state, after it has been well stirred with the rake, it must be drawn out of the furnace, and when cold broken up for use. To obtain the mineral alkali from soda : soda and the caput mortuums before mentioned, or others of a similar nature, I proceed exactly in the same way as described above respecting kelp. To obtain the mineral alkali from the salt in black ashes, I take of them two hundred weight, first ground small, which I dissolve in water or soapers' spent-lye. I then take two hundred weight and a balf of soapers' waste-ashes, and one hundred weight and a half of tanners' waste-bark, and mix them intimately together they are then moistened throughout with the lixivium made of the black ashes, and thrown into the furnace. Afterwards I proceed, as in the case of kelp, excepting that I substitute this lixivium in the place of water, which is thrown into the furnace with the bark before each stirring of the materials. until the whole lixivium is used.. I then employ water, as described above with respect to kelp. I proceed precisely in the same way in obtaining the mineral alkali from natron, and also from salts produced from soapers' spent-lye, excepting that the lixivium in the latter instance is made with two hundred and a half instead of two hundred weight of the salts. To obtain the mineral alkali from salt rock and common salt, I take two hundred weight of either of them, and one hundred weight of black ashes, or the same quantity of salts obtained from soapers' spent-lye, I add the soapers' waste-ashes or lime, and the waste-bark, and then proceed exactly as I do with kelp. To obtain the mineral alkali from brine and sea-water,. I evaporate them until they yield their salt; with one hundred weight of which I mix the same quantity of black ashes, or of salts produced from soapers' lye: I then add the soapers' waste-ashes, tanners' bark, water, or spent-lye, and proceed as with the kelp, &c. To obtain the mineral alkali from soapers' spent-lye, I evapo |