Harker, 414; Vesuvius in 1889, Prof. Palmieri, 18; Geo Wharton (Captain W. J. L., F.R.S.): Notes on a Recent Vol. Experiments on, in Italy, Prof. Giglioli, 404 Work, 503 Whitaker (W.), a Deep Channel of Drift in the Valley of the Cam, Essex, 527 White William), British Earthquakes, 202 Whitham Jay M.), Steam-Engine Design, 29. Cyclone of September 11-12, 1889, in Japan, 208; Meteoro- Willem (Victor), the Gizzard in Scolopendridæ, 237 Williams (F. N.): Enumeratio Specierum Varietatumque Explosions in Mines in Relationship to Cosmic and Meteoro Europe, 78 Williams (R. P.) and B. P. Lascelles, Introduction to Chemical Plants of Coal-Measures, 573 298 Wilson William), Practical Observations on Agricultural Grasses Wilson (Woodrow), the State, Elements of Historical and Prac- Wilson-Barker (Captain David), Foreign Substances attached Wimshurst Machine and Hertz's Vibrator, T. A. Garrett and W. Lucas, 515 Wind at Summit of Eiffel Tower, Mean Hourly Velocity of, A. Angot, 67 Winds, Dependence of Force of, upon Surface over which they blow, Dr. Van Bebber, 372 , Physical Properties of, Prof. P. G. Tait, 416 ; Prof. William Ellis, 586 Winlock (Prof.), Progress of Astronomy in 1886, 374 Wolves and Bears in Bosnia, 325 , 182 Wood (Rev. J. G.), the Brook and its Banks, 53; the Zoo, 53 Woodford (C. M.): Further Explorations of Solomon Islands, 403 ; a Naturalist among the Head-hunters, 582 Woodthorpe (Colonel), the Aka Expedition of 1883, 86 Woodward (A. S.), some British Jurassic Fish-remains, 310 World, Library Reference Atlas of the, John Bartholomew, 413 Worthington (Prof. A. M.), Bourdon's Pressure-Gauge, 296, 517 Wright (M. R.), Elementary Physics, 78 Wrightson (Prof. John): Sources of Nitrogen in Soils, 286; How to know Grasses by their Leaves, by A. N. M'Alpine, 557 Wynne (W. P.), Constitution of Tri-derivatives of Naphthalene, Visconti, 380 Yatchevsky (M.), Limits of Ever-frozen Soil in Siberia, 472 Young (Arthur), Travels in France, 294 Young (Dr. Sydney), Exact Thermometry, 152, 271, 488 Yule (Sir Henry), Death of, 207 Zeiss's New Apochromatic Microscope Objective, 494 Zelbr (Dr.), Comet Swift (f 1889, November 17), 115, 233 Zodiacal Light, Maxwell Hall on the Spectrum of the, 351, 402 Zoo, the, Rev. J. G. Wood, 53 Zoogeography: Wolves, &c., in Germany, Dr. Lampert, 182 Zoological Discoveries, N. M. Przewalsky's, 468 F.R.S, 368 Squares, 394 Zoological Floating Station at Isefiord, Denmark, 569 Rat in Cornwall, Thos. Cornish, 161; Snake and Fish, Herr 210, 232, 256, 284, 304, 326, 349, 402, 449, 472, 496, 521, Internal Capsules of Bonnet Monkey, Beevor and Horsley, 166; Heloderma suspectum, the Poisonous Lizard of South- a Milk Dentition in Orycteropus, O. Thomas, 309; the Cata- Hart Merriam, 11, 151; Prof. W. H. Flower, F.R.S., 30 151; Zsigmondy (Dr. Emil), his Alpine Expeditions, 291 A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. “To the solid ground NALDER BROS., & Co., No. 1045, VOL. 41.] THURSDAY, NOVEMBER 7, 1889. [PRICE SIXPENCE. Registered as a Newspaper at the General Post Office.)“. [All Rights are Reserved. NEWTON & CO., SCIENTIFIC. INSTRUMENT Sole Makers of Profs. AYRTON and PERRY'S LATEST TYPE OF SECOHMMETERS. AND STANDARDS OF SELF-INDUCTION. ,132 HORSEFERRY ROAD, WESTMINSTER. TELEGRAPHIC ADDRESS : SECOHM, LONDON, Catalogue of PRICES ON APPLICATION. SECOHMMETER. OF EVERY DESCRIPTION. NEW ILLUSTRATED CATALOGUE OF 144 pages, 6d. Science and Art Department. NEWTON & CO., 3 FLEET STREET, TEMPLE BAR, LONDON, E.C. THE CAMBRIDGE SCIENTIFIC INSTRUMENT COMPANY, ST. TIBB'S ROW, CAMBRIDGE. RADIO-MICROMETER. Phil. Trans. of the Royal Society, vol. 180 (1889), A. 41. QUARTZ FIBRES. Production, Properties, and some Suggested Uses of the Finest Fibres" Now Ready, Vol. X. Complete. BY MICHAEL FOSTER, M.D., F.R.S. Published by the Proprietors and sold on their behalf at ST. TIBB'S ROW, CAMBRIDGE. THE VICTORIA UNIVERSITY. LIVING SPECIMENS FOR THE MICROSCOPE. THE EXTERNAL EXAMINERS OF THE UNIVERSITY, GOLD MEDAL awarded at the FISHERIES EXHIBITION T. ARNOLD, M.A., Fellow of the Royal University of Ireland, Examiner THOMAS BOLTON, 83 CAMDEN STREET, BIRMINGHAS, T. G. BONNEY, D.Sc., LL.D., F.R.S., Professor of Geology in University and description. He also sent out Paludicella Ehrenbergii, Philodina roseola Who last week sent to his subscribers Stentor polymorphus, with sketch E. BRAUNHOLTZ, M.A., Ph.D., University Lecturer in French, Cam Hydrodictyon utriculatum, Leptodora hyalina, Corethra, Floscularia, Clathru bridge Examiner in French Language and Literature. lina elegans, Limnias ceratophylli, Melícerta ringens, Stephanoceros, Volvos J. A. EWING, B.Sc., F.R.S., Professor of Engineering in University globator ; also Amceba, Hydra, Vorticella, Crayfish, Dog-fish, Amphi oxus, College, Dundee. Examiner in Engineering. and other Specimeas for Biological Laboratory work. WILLIAM GARNETT, M.A., D.C.L., Principal of Durham College of Weekly announcements will be made in this place of Organisms T. B Science, Newcastle-on-Tyne, Examiner in Physics. is supplying. A. PEARCE GOULD, M.S., F.R.C.S., Surgical Tutor in Middlesex Hospital. Examiner in Surgery. Specimen Tube, One Shilling, post free. A. V. HARCOURT, M.A., F.R.S., Reader in Chemistry in the University of Oxford, Examiner in Chemistry. Twenty-six Tubes in Course of Six Months for Subscription of 41 12.. *MATTHEW HAY, M.D., C.M. Professor of Medical Jurisprudence, or Twelve Tubes for rok. 6d. Portfolio of Drawings, Eleven Parts, 1S. each. OWENS COLLEGE, MANCHESTER. BISHOP BERKELEY FELLOWSHIPS. A. G. 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M.A., Professor of Philosophy in University College, Economic Science. Geology (including Palæontology). Cardiff, Examiner in Philosophy and Political Economy. Pure Mathematics. Physiology. H. M. TAYLOR, M.A., Fellow and Mathematical Lecturer of Trinity Applied Mathematics. Pathology. College, Cambridge, Examiner in Mathematics. Engineering. Pharmacology. G. D. THANE, M.R.C.S., Professor of Anatomy in University College, London, Examiner in Anatomy. A fuller Statement of Particulars and Conditions will be forwarded on D'ARCY W. THOMPSON, B.A., Professor of Zoology in University Col. application. lege, Dundee, Examiner'in Zoology. AUGUSTUS D.'WALLER, M.D., Lecturer on Physiology in St. Mary's HONORARY RESEARCH FELLOWSHIPS. Hospital Medical School, London, Examiner in Physiology. A limited number of Appointments will be made in December next Application must be made on or before NOVEMBER 26. There are no The Examiners against whose names an asterisk (*) is placed retire at emoluments attached to these Fellowships, but Fellows have equal opporthe end of November. Applications are invited for the posts they now fill, tunities for research in scientific subjects to those enjoyed by the Bishop which should be sent in on or before NOVEMBER 30, and may be Berkeley Fellows. accompanied by Testimonials (Copies only) or References, at the Candidate's A fuller statement will be forwarded on application. discretion. The appointments will be for Three Years, at the expiration of HENRY WM. HOLDER, M.A., Registras. which Examiners are not re-eligible. For further Particulars, apply to A. T. BENTLEY, M.A., Registrar. OWENS COLLEGE, MANCHESTER. Manchester, October 1889. The Senate invites Applications for the post of SENIOR DEMONTHE MASON COLLEGE, STRATOR in PHYSIOLOGY, at a Stipend of £150 per Annum. A detailed statement of the duties, &c., may be obtained from the BIRMINGHAM. REGISTRAR. Applications, with Testimonials, should be addressed to the Senate, under PROFESSORSHIP OF THE FRENCH LANGUAGE AND cover to the REGISTRAR, not later than NOVEMBER 20. LITERATURE HENRY WM. HOLDER, M.A., Registrar. The Council invite Applications for the above Professorship, vacant by the Annum, plus one half of the Fees from Day Students, and the whole of the AN UNDERGRADUATE OF LONDON Fees from Evening Students. UNIVERSITY (Honours Man at Preliminary Scientific) is prepared to Applications, accompanied by Ten Copies of Testimonials, should be sent coach or take Classes in Zoology, Botany, Physics, &c. He has already to the undersigned not later than November 30, 1889. had success in passing Pupils. Terms Moderate. First Class Test:The successful Candidate will be expected to enter upon his duties on January 21, 1890. monials.-Address WILFRED MARK WEBB, Biological Laboratory, Candidates are especially requested to abstain from canvassing. Lonsdale Chambers, Chancery Lane. Further Particulars may be obtained from GEO. H. MORLEY, Secretary. A GENTLEMAN engaged in ORIGINAL RESEARCH wishes to meet someone who, being capable, would be BALLIOL COLLEGE, CHRIST CHURCH, willing to employ his spare time in cutting Thin Sections for the Micro scope. --Address by letter, stating terms, to "F.S.S.," 13 Cromwell Crescent, South Kensington. TRINITY COLLEGE, OXFORD. NATURAL SCIENCE SCHOLARSHIPS AND EXHIBITIONS. MR. ERIC STUART BRUCE, M.A. Oxon., A combined Examination for Natural Science Scholarships and Exhibi F.R.Met. Soc., can accept ENGAGEMENTS for the delivery of his tions will be held by the above Colleges, beginning on TUESDAY, eminently successful Popular Lectures on Scientific Questions of the NOVEMBER 19, 1889. Day. Brilliant Experiments.-Address, E. Bruce, Esq., to Observatory Three Scholarships and two Exhibitions will be offered, the Scholarship Avenue, Kensington, London, W. being worth £,80 a year. 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