CONTAINING TITLE-PAGE, INDEX, &c., TO VOLUME XXVII. SCIENTIFIC PRESENTS.-Collections to important study of Mineralogy and Geology, can be had at 2, 5. 10, 20, Illustrate Elements of and facilitate the 50, to 500 guineas; 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. r. 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. OXIDE OF IRON. We are prepared to supply, on moderate terms, For Particulars and Prospectuses, apply to Mr. Henry Matthews HYDRATED PEROXIDE OF IRON (BOG OCHRE), the Laboratory, 60, Gower Street, Bedford Square, W.C. Same quality as supplied by us to several of the most extensive Gas Companies, and which has given entire satisfaction. FRANCIS RITCHIE AND SONS, BELFAST. Smith kidd, Licensed Maker, Commercial Street, Shoreditch, N.E. Also FINISH, FUSEL OIL, and RECT. NAPHTHA. — Davic INSULATED ELECTRICAL WIRES. J. & W. RICKARD, ASHBOURNE ROAD MILLS, DERBY, Manufacture all kinds of Silk and Cotton-Covered Copper Wires. Thorough Insulation. Conductivity 90 per cent guaranteed Price List on application. GERMAN SILVER WIRES IN SILK OR COTTON COVERING TO Order, M. JACKSON, SON OF J. B. JACKSON, OF THE LATE FIRM OF JACKSON & TOWNSON, 65 BARBICAN, LONDON, F.C. NEARLY OPPOSITE THE ALDERSGATE STREET STATION OF THE METROPOLITAN RAILWAY. TOWNSON & MERCER (LATE JACKSON & TOWNSON), 89, Bishopsgate Street Within, LONDON. Wholesale and Export Dealers and Manufacturers of CHEMICAL & SCIENTIFIC APPARATUS, PURE CHEMICALS. COMPLETE SETS OF QUALITATIVE, QUANTITATIVE, VOLUMETRIC AND ASSAY APPARATUS. 181 PLATTNER'S BLOWPIPE. EGGERTZ CARBON. 191 WHOLESALE AND EXPORT. Maker of Apparatus to the Laboratories of the Inland Revenue, Royal Arsenal, Royal Military Academy, AND THOMPSON'S FUEL TEST APPARATUS. BISULPHIDE OF CARBON AS FREE AS POSSIBLE FROM ALL UNPLEASANT ODOUR. AMMONIA. CHLORIDE of SULPHUR. BENZOL. TETRACHLORIDE of CARBON. ANTHRACENE. NAPHTHA. JOHN BARROW, DALTON CHEMICAL WORKS, WEST GORTON, MANCHESTER. PHOTOGRAPHIC AND OPTICAL WAREHOUSE. J. SOLOMON, 22, RED LION SQUARE, LONDON, W.C., PATENTEE OF MAGNESIUM LAMP FOR ENLARGING PHOTOGRAPHS. Catalogues on Application. FOR SALE BY J. PATTISON & Co., 137, WEST GEORGE STREET, GLASGOW. HENRY PONTIFEX & SONS, Illustrated Catalogue post free on application. COPPERSMITHS, ENGINEERS, &c., MANUFACTURERS OF JOSEPH HARTLEY, APPARATUS, MACHINERY, AND UTENSILS OF EVERY DESCRIPTION WEST GORTON, MANCHESTER. FOR CHEMICAL WORKS. BISULPHIDE OF CARBON. ALBION WORKS, KING'S CROSS, LONDON. |