CONTAINING TITLE-PAGE, INDEX, &c., TO VOLUME XXVII. OXIDE OF IRON. We are prepared to supply, on moderate terms, HYDRATED PEROXIDE OF IRON (BOG OCHRE), INSULATED Makers of every description of Chemical, Colliery, Copper Ore, Gold Makers of the latest Improved Revolving Black Ash Furnace, with Siemens's Patent Gas Arrangement, and as used in the Manufacture of Soda. Improved Valveless Air Engines, and Pumps for Acid Forcing, Air Caustic, Chlorate, Decomposing, and Oxalic Pans. Pyrites Burners for Irish, Norwegian, and Spanish Ores. Photographs, and other information, supplied on receipt of Orders. Chlo hloride of Calcium (Purified Muriate of Lime), total insoluble impurities under per cent. CHLORIDE OF BARIUM (Muriate of Baryta), free from Iron and Lead, total impurities, water excepted, under per cent GASKELL, DEACON, & CO., ALKALI MANUFACTURERS WIDNES. LANCASHIRE. Silicates of Soda and Potash in the state of Soluble glass, or in CONCENTRATED SOLUTION of first quality, suited for the manufacture of Soap and other purposes, supplied on best terms by W. GOSSAGE and Sons, Widnes Soapery, Warrington. London Agents, CLARKE and COSTE, 19 and 20, Water Lane, Tower Street, E.C., who hold stock ready for delivery. SCIENTIFIC PRESENTS.-Collections to important study of Mineralogy and Geology, can be had at 2. 5, 10, 20, Illustrate "Lyell's Elements of Geology," and facilitate the 50, to 500 guineas; also single specimens of Minerals, Rocks, Fossils, and Recent Shells. Geological Maps, Hammers, all the recent pub. lications, &c., of J. TENNANT, Mineralogist to Her Majesty, 149, Strand.-Private Instruction is given in Geology and Mineralogy by Mr. Tennant, F.R.G.S., at his residence, 149, Strand, W.C. PRACTICAL CHEMISTRY. Laboratory, 60, Gower Street, Bedford Square, W.C. Mr. Henry Matthews, F.C.S., is prepared to give Instruction in all branches of PRACTICAL CHEMISTRY, particularly in its application to MEDICINE, AGRICULTURE, and COMMERCE. The Laboratory is open daily, except Saturday, from ten to five o'clock; on Saturday, from ten till one o'clock. Mr. Matthews is also prepared to undertake ANALYSES of every description. For Particulars and Prospectuses, apply to Mr. Henry Matthews the Laboratory, 60, Gower Street, Bedford Square, W.C. kidd, Maker, Commercial Street, Shoreditch, N.E. Also FINISH, FUSEL OIL, and RECT. NAPHTHA. ELECTRICAL J. & W. RICKARD, WIRES. ASHBOURNE ROAD MILLS, DERBY, Manufacture all kinds of Silk and Cotton-Covered Copper Wires. Thorough Insulation. Conductivity go per cent guaranteed Price List on application. GERMAN SILVER WIRES IN SILK OR COTTON COVERING TO Order, SCIENTIFIC APPARATUS. FINEST BERLIN BOHEMIAN GLASS. 101 GRADUATED INSTRUMENTS. HOFMANN'S APPARATUS. M. JACKSON, SON OF J. B. JACKSON, OF THE LATE FIRM OF JACKSON & TOWNSON, 65 BARBICAN, LONDON, E.C. NEARLY OPPOSITE THE ALDERSGATE STREET STATION OF THE METROPOLITAN RAILWAY. PURE CHEMICALS. COMPLETE SETS OF QUALITATIVE, QUANTITATIVE, VOLUMETRIC AND ASSAY APPARATUS. 191 PLATTNER'S BLOWPIPE. EGGERTZ CARBON. 101 WHOLESALE AND EXPORT. AND THOMPSON'S FUEL TEST APPARATUS. Maker of Apparatus to the Laboratories of the Inland Revenue, Royal Arsenal, Royal Military Academy, Science Schools, South Kensington, &c., &c. CATALOGUES POST FREE ON APPLICATION. BISULPHIDE OF CARBON AS FREE AS POSSIBLE FROM ALL UNPLEASANT ODOUR. CHLORIDE of SULPHUR. AMMONIA. BENZOL. TETRACHLORIDE of CARBON. ANTHRACENE. NAPHTHA. JOHN BARROW, DALTON CHEMICAL WORKS, WEST GORTON, MANCHESTER. TOWNSON & MERCER (LATE JACKSON & TOWNSON), 89, Bishopsgate Street Within, BISULPHIDE OF CARBON. ALBION WORKS, KING'S CROSS, LONDON. |