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Self-recording Barometers, Self-recording Thermometers, Self-recording Hygrometers, Self-recording Galvanometers, Self-recording Rain-gauges, &c., Should see that they are marked TRADE RE MARK. This mark has been entered by the Inventors and Manufacturer No articles without this Mark are genuine. TO SCIENCE LECTURERS. See Mr. HUGHES'S PATENT COMBINATION OPTICAL LANTERN, used by late W. LANT CARPENTER, Esq., Prof. FORBES. New Triple constructed for B. J. MALDEN, Esq., this season. New Oxyhydrogen Microscope. Grand Results Docwra Triple, Prize Medal, Highest Award. Supplied to the Royal Polytechnic Institution, Dr. H. GRATTAN GUINNESS, Madame ADELINA PATTI, &c. Patent Pamphagos Lantern Science Lecture Sets Novelties Cheapest and Best. Elaborately Illustrated Catalogue 300 pages, 15.; Postage, 5d. Smaller do., 6d. Pamphlets Free.-HUGHES, SPECIALIST, Brewster House, Mortimer Road, Kingsland, N. NO BELLADONNA NEEDED. FOURNET'S REFRACTOMETER. 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C. CHAMPION, F.ZS. J. W. [e W. W. FOWLER, M.A., F L.S., R. McLACH AN, F.R S., E S F.L.S., and LORD WALSINGHAM, M A., LL D., F.R.S. This Magazine, commenced in 1864, contains standard articles an on all subjects connected with Entomology, and especially on the the British Isles. Subscription-Six Shillings per Annum, post free. London: GURNEY & JACKSON (Mr. Van Voorst's Succes N. B.-A Second Series was commenced with the Number for Ja MESSRS. MACMILLAN AND CO.'S NEW BOOKS. NATIONAL LIFE AND CHARACTER: a Forecast. By CHAS. H. PEARSON, 4 late Minister of Education, Victoria. 8vo, 10s. net. By IONEERS OF SCIENCE. BY OLIVER LODGE, F.R.S., Professor of Physics in the Victoria University College, Liverpool. With Portraits and other Illustrations Extra Crown 8vo, Cloth, 7s. 6d. A course of lectures on the lives of epoch-making men, principally in the Department of Astronomy, giving an account of their wrk, and tracing their influence on the development of human thought. The first part of the course, called From Dusk to Daylight," asists of nine lectures on the men from Copernicus to Newton inclusive, especially Tycho, Kepler, Galileo, Descartes, and aims at blaining the scientific aspect of their work in a clear and intelligible manner with copious illustrations. The second part of the urse consists of nine lectures on such subjects as the Velocity of Light; Herschel and the Stars; the discoveries of Asteroids and of ptune; Comets and Meteors; and the Tides; with some biographical details and much scientific exposition addressed to persons literary education. 'HE CHEMICAL BASIS OF THE ANIMAL BODY. An Appendix to Fifth Edition. By A. SHERIDAN LEA, M. A., D.Sc., F.R.S., University Foster's "Text-book of Physiology." Lecturer in Physiology in the University of Cambridge; Fellow of Caius College. 8vo, Cloth, 7s. 6d. The following appendix has been written upon the same lines as in former editions, save that it has been enlarged, and in reality w constitutes a treatise on the chemical substances occurring in the animal body. As in former editions it is entirely the work of . A. Sheridan Lea. The references given, though extensive, are not intended to be exhaustive. An effort has been made to make e references to recent works as complete as possible, other references are to papers, which them elves give full references, and will theree serve as a guide to literature of the subject; and some have been inserted in order to inform the student of the dates at which portant results were first described."-From the Preface. LECTRICAL PAPERS. BY OLIVER HEAVISIDE. 2 vols., 8vo, 30s. net. TEXT-BOOK OF TROPICAL AGRICULTURE. By H. A. ALFORD NICHOLLS, M.D., F.L.S. With Illustrations. Crown 8vo, Cloth, 6s. ICTIONARY OF POLITICAL ECONOMY. Edited by R. H. INGLIS PAL GRAVE, F. R. S. 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R. C. MOSSMAN, Japanned Tin Body; 4-inch Compound Condensers; Double Achromatic Front Lenses, with Rack Adjustment; and powerful Three-wick Lamp, in Strong Wood Case, complete, price £1 12s. 6d. o be obtained of all Opticians and Wholesale Houses. HICKS, 8, 9, & 10 HATTON GARDEN, LONDON. Or with Four-wick Lamp, £1 16s. 6d. This is an admirable Lantern for making Photographic Enlargements. Illustrated Catalogue of Lanterns, 352 pp., Post free. JOHN BROWNING, Optical & Physical Instrument Maker, OF EVERY DESCRIPTION. J. BECK 68, CORNHILL, LONDON, E.C. Barometers, Microscopes, Telescopes, Illustrated Price Lists posted free to all parts of the World. NEGRETTI & ZAMBRA, OPTICIANS AND SCIENTIFIC INSTRUMENT MAKERS TO THE QUEEN, Branches :-45 CORNHILL; 122 REGENT STREET. N. & Z.'s Large Illustrated Catalogue, 1200 Engravings. Price 5s. 6.7 |