Obfervations on Soda, Magnesia, and Lime contained in Sea Wa- On the Nature of the Varieties of engrafted Fruit. By T. S. D. 352 361 409 Description of the Life-boat invented by Mr. THO. GReathead, Papers tranflated from Foreign Works. - Method of rendering White-wash made with Lime durable; also a Procefs for preparing Oxyd of Iron, or Martial Ethiops. By M. Experiments on the Action of fome newly-discovered Metals and Description of a new Process of Refining. By M. DArcet, Experiments on the Caufes of the Coagubility of faponaceous Solu- tions, and Indication of a Method of difcovering the Quality of On the Wax-tree of Louifiana and Pennfylvania. By C. L. CADET, 132 New Method of expeditiously obtaining Nitric Ether, by Distilla- tion without external Heat. By M. BRUGNATELLI, New Obfervations on the Converfion of fixed Oils into Wax, By New Method of making Cements for Terraces, and on the Em- ployment of Liquid Pitch to render them impermeable to Water, and capable of refifting Froft, By CASIMIR PUYMAURIN, On the Extraction of Spirit from Potatoes. By M. Bertrand, Obfervations on the Decomposition of Acetite of Lead by Zinc in Obfervations on Precipitates formed by Pruffiates in Acid Solu- M. ROBERT, on the Inflammation of combuftible Bodies, by their Contact with Sulphuric Acid; with additional Experiments. By Meffrs. CADET and BOULLAY, M. EKEBERG, on fome Properties of Yttria compared with those of Glucine, and on two Substances in which he has found a new Method of preparing the Extract of Opium. By M. BARRIER, Method of correcting fome Inconveniencies arifing from the in- equality of the Fire in Distillation on a large Scale. By. M. On the Application of Platina to Porcelain. By M. KLAPROTH, 459 Experiments demonftrating the Prefence of Pruffic Acid com- Account of the Proceedings of Societies for promoting useful Knowledge. Society of Sciences of Harlem, 75 Academy of Arts, Sciences, and Belles Lettres, of Dijon, 75 Society of Sciences, Belles Lettres, and Arts of Bordeaux, Royal Society, Smithfield Cattle and Sheep Society, Agricultural Society of the Department of the Seine, 78 145, 233 151 156 Monthly Intelligence relating to Arts, Manufactures, &'c. Trial for alledged Infringement of Mr. Tennant's Patent for a Discovery of a Mine of Zinc-ore, French Patent for Improvements on Wheel Carriages, Method of augmenting the Force of Gun-powder, 319 397 New Lamp-Difcovery of a Spring of Petroleum, Cultivation of Hops in Ruffia-Galvanic Experiments by Aldini, 398 · 399 471 Improvement of Iron Manufactures-Vaccine Inoculation, 399, 472 THE REPERTORY OF ARTS, MANUFACTURES, AND AGRICULTURE. NUMBER VII. SECOND SERIES. DEC. 1, 1802. Specification of the Patent granted to THOMAS MARTIN, of Goswell-street, Clerkenwell, in the County of Middlesex, Saddler, Collar, Harness-maker, and Tawer; for Improvements in the Art of Tanning and Dressing Hides and Skins. Dated April 19, 1802. To all to whom these presents shall come, &c. Now KNOW YE, that in compliance with the said proviso, I the said Thomas Martin do hereby declare my invention to be described in manner following; that is to say: My invention consists in placing a boiler, of convenient size, as near a reservoir of water as the nature of circumstances will admit, with a pipe near the edge of the boiler, to convey the warm water into a tub or vat, which should be placed near to, and rather higher than, the vats in which it is intended to place the raw goods, and those working out of the limes; so that the first may empty itself into a second and third vat, or into as many VOL. II. SECOND SERIES. B as as may be deemed necessary. These vats must have false bottoms, for the reception of the sand and filth. But a pipe, with a cock between the vats, is preferable to the method of flowing. The first tube or vat is not intended for goods, but only to regulate the warmth of the water. The blood and filth congealed in the pores of the pelt, when the animal was dying, together with the dirt collected in the slaughter-house, markets, &c. &c. will, by the application of the water, rather warmer than blood heat, be more readily separated from the skins, and will sink under the false bottoms, whence it may be conveyed into a sewer by pulling out a plug from the real bottoms. The application of warm water will revive dried hides, and will greatly expedite the process of tanning or dressing by expanding the pores for the reception of the ooze, alam-liquor, &c. The hair, and particularly wool, in this manner will be more easily cleansed of the dirt. The raw hides may, however, be immersed in cold water to cleanse them from the external blood and filth previous to their being put into the warm water. By this method the hides or skins will not require so much drenching (if any) in sours, as in the mode commonly used. The hides being perfectly cleansed from blood and extraneous matter in the usual manner, with a knife, on a beam, are ready for the limes: when they are sufficiently limed, and the hair taken off, they should be worked out clean from the lime with warm water: any remaining blood or lime in the pores prevents the ooze or other materials for tanning, tawing, currying, or dressing, of leather, from penetrating into the fibres, and renders the leather hard when tanned, or otherwise dressed. Having described my method of preparing the goods for the ooze, and the subsequent processes, I shall now proceed |