Now Ready, Vol. 1., New Series, cloth, 8vo., price 21s., Illustrated with Chromo-Lithograph, MINING, METALLURGY, ENGINEERING, INDUSTRIAL ARTS, Double Spectra. With Chromo-Lithograph and plain Page Plate. By W. MARSHALL The Great Pyramid of Egypt, from a Modern Scientific Point of View. By C. PIAZZI SMYTH, F.R.S., Astronomer-Royal for Scotland. On the Theory of Irrigation. By FREDERIC CHARLES DANVERS, A.I.C.E. War Science. With Three Woodcuts. By H. BADEN PRITCHARD, of the General Photo- graphic Establishment of the War Department. Spectra of Metallic Compounds. With Page Plate. On the Various Tints of Autumnal Foliage. By H. C. SORBY, F.R.S., &c. On the Relations between Chemical Change, Heat, and Force, with a special view to the Economy of Electro-Dynamic Engines. By the Rev. H. HIGHTON, M.A., late Prin- cipal of Cheltenham College, and Fellow of Queen's College, Oxford. A Page of Scientific History. Reminiscences of the Early Days of the Royal College of Chemistry. By A. W. 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CLERK MAXWELL, M.A., LL.D. Edin., F.R.SS. L. and E., Professor of By Professor JOHN TYNDALL, LL.D., F.R.S. Fourth Edition. Crown 8vo., with SOUND: A Course of Eight Lectures delivered at the Royal Institution. By Professor JOHN DIAMAGNETISM, with Plates, &c., price 14s. FARADAY as a DISCOVERER, with 2 Portraits, 3s. 6d. NOTES of LECTURES on LIGHT, Is. sewed; Is. 6d. cloth. NOTES on ELECTRICAL PHENOMENA, &c., Is. and Is. 6d. FRAGMENTS of SCIENCE for UNSCIENTIFIC PEOPLE, price 14s. GANOT'S ELEMENTARY TREATISE ON PHYSICS. A DICTIONARY OF CHEMISTRY AND THE ALLIED BRANCHES OF OF OTHER SCIENCES. By HENRY WATTS, F.C.S., assisted by eminent Scientific and Practical Chemists. 5 vols. 8vo., price £7 3s. SUPPLEMENT, price 31s. 6d., early in January, 1872. ELEMENTS OF MATERIA MEDICA AND THERAPEUTICS. Abridged from Dr. PEREIRA'S Work by ROBERT BENTLEY, M.R.C.S., F.L.S., and THEOPHILUS REDWOOD, Ph.D., F.C.S. With numerous Woodcuts. 8vo., price 31s. 6d. [In January. HANDBOOK OF PRACTICAL TELEGRAPHY. 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London LONGMANS, GREEN, and CO., Paternoster Row. : Demy 8vo., 244 pages, with Illustrations, price 7s. 6d. cloth, THE FUEL OF THE SUN. By W. MATTIEU WILLIAMS, F.C.S. London: SIMPKIN, MARSHALL, & Co. Just Published, price 21s., 700 pp., 8vo. A SYNONYMIC CATALOGUE OF DIURNAL LEPIDOPTERA. By W. F. KIRBY, Author of "A Manual of European Butterflies." Containing the full Synonymy of every Species and an Alphabetical Index of about 10,000 references. "The value of such a work to students is very great. Every naturalist who can afford it should add it to his library, not only for its intrinsic value, but as a recognition of the service bestowed on science by its painstaking author." -Academy. JOHN VAN VOORST, I, Paternoster Row. Now publishing in Monthly Parts, price 2s. 6d. each, medium 8vo., with numerous Illustrations, GRIFFITH & HENFREYS MICROGRAPHIC DICTIONARY. Third Edition, Edited by J. W. GRIFFITH, M.D., &c., assisted by the Rev. M. J. BERKELEY, M.A., F.L.S., and Professor T. RUPERT JONES, F.G.S. JOHN VAN VOORST, I, Paternoster Row. DR. DUDGEON "On the Mechanism of Accommodation for Distant and Near Vision." See "BRITISH JOURNAL OF HOMEOPATHY" for January, 1872, price 5s. TURNER, 77, Fleet Street, E.C. Just Published, in 8vo., price ONE SHILLING, R EMARKS on RECENT OCEANIC EXPLORA TIONS by the BRITISH GOVERNMENT, and on the Supposed Discovery of the Law of Oceanic Circulation by Dr. W. B. CARPENTER, F.R.S. By W. LEIGHTON JORDAN. London: LONGMANS, GREEN, & Co., Paternoster Row. Fourth Edition, Illustrated by 571 Engravings, demy 8vo., pp. 886, price £1 11s. 6d., THE GENERAL OUTLINE OF THE ORGANISATION OF ANIMAL AND KINGDOM, MANUAL OF COMPARATIVE ANATOMY. By THOMAS RYMER JONES, F.R.S., Professor of Comparative Anatomy in King's College, London, &c., &c. JOHN VAN VOORST, I, Paternoster Row. ACKLAND'S MICROSCOPIC LAMP. THIS Lamp is offered to Microscopists as thoroughly efficient, and yet very moderate in price. It embraces all the latest improvements, and is furnished with HAILE'S Porcelain Shade, which, whilst shielding the observer's eyes from the glare of the Lamp, acts as a reflector to increase the brilliancy of the illumination. The glass reservoir is shallow, so that the paraffin rises freely and feeds the wick regularly. The reservoir rotates in the arm, B, so that the flat or edge side of the flame can be used. The shade can be adjusted to a proper position, as regards the flame, by sliding up or down the arm D, and the lamp fixed at any required height by the clamping screw, c. As the tube E carries the tube D, when the Lamp and shade are properly adjusted, the whole may be raised or depressed without deranging that adjustment by sliding up or down the arm B. The brass wick-mount is hinged, so that the gallery or chimney can be turned back to facilitate turning and lighting. HORNE BARKER'S IMMERSION PARABOLA, For dark ground illumination, with high powers, giving effects hitherto unattainable. Price £111. 6d. Illustrated Catalogue of Microscopes and accessories sent on receipt of Two Stamps. Opticians, Philosophical and Photographic Instrument Makers in Ordinary to Her Majesty, 122 & 123, NEWGATE STREET, LONDON, E.C. LONDON LIBRARY, 12, ST. JAMES'S SQUARE, LONDON. (FOUNDED IN 1841.) Patron-His Royal Highness the Prince of Wales. The following are the terms of admission to the Library, which contains 85,000 volumes of Ancient and Modern Literature, in various Languages: Subscriptions, £3 a year, or £2, with entrance fee of £6; Life Membership, £26. Fifteen volumes are allowed to country and ten to town members. Reading-room open from ten to half-past six. Prospectuses on application. Catalogues, price 15s.; to members, 10s. 6d. ROBERT HARRISON, Secretary and Librarian. BROWNING'S NEW LARGE AUTOMATIC ELECTRIC LAMP. In this Lamp both carbons are moved by the electricity of the battery employed (without the aid of clockwork); the light remains uniform in height, and more steady in action than any of the expensive regulators previously introduced. Any number, from 20 to 50-quart Grove's Cells, or 2-quart Bunsen's, may be used with this Lamp. Price £8 8s. JOHN BROWNING begs to announce that he has prepared, with peculiar care, a great number of Diagrams to illustrate recent discoveries in Spectrum Analysis and other branches of Observational Astronomy. These Slides can be had either plain or exquisitely coloured. Prices-3s. 6d. plain, and from 4s. 6d. to ios. 6d. coloured. A list of subjects priced on application. Photographs of Microscopic Objects for the Lantern, 3s. each. Lists on application. ELECTRIC LAMPS, either separately or with Lantern Apparatus, for Public Exhibitions and Lectures. for showing Diagrams or Spectrum Experiments on Screen, or for Illuminating Halls or Buildings, on hire, either in town or country. Qualified Assistants sent if desired. Terms on application. To Her Majesty's Government, the Royal Society, III, MINORIES, LONDON, E. Just published, demy 8vo., with 42 Woodcuts, price 14s., THE ANTISEPTIC SYSTEM; A Treatise on Carbolic Acid and its Compounds, with an Enquiry into the Germ Theories of Putrefaction, Fermentation, and Infection, the Theory and Practice of Disinfection, and the Employment of Antiseptics in Practical Medicine and Surgery. By A. E. SANSOM, M.D., Lond., M.R.C.P. LONDON: HENRY GILLMAN, BOY COURT, LUDGATE HILL, E.C. ROYAL INSTITUTION OF GREAT BRITAIN, The ALBEMARLE STREET, W. he next ACTONIAN PRIZE, or PRIZES, will be awarded in the year 1872 to an Essay, or Essays, illustrative of the Wisdom and Beneficence of the Almighty. The Subject is "THE THEORY OF THE EVOLUTION OF LIVING THINGS." The Prize Fund is Two Hundred Guineas, and it will be awarded as a single Prize, or in sums of not less than One Hundred Guineas cach, or withheld altogether, as the Managers in their judgment shall think proper. Competitors for the Prize are requested to send their Essays to the Royal Institution, on or before June 30, 1872, addressed to the Secretary; and the adjudication will be made by the Managers in December, 1872. December, 1871. H. BENCE JONES, Hon. Sec. R.I. |