624 perspective.-Prof. Blackie read a paper on the most recent PARIS. In Academy of Sciences, April 19.-M. d'Abbadie in the chair. Calculation of the diminution which is experienced by the mean pressure on a fixed horizontal plane, in the interior of a heavy liquid filling a basin and agitated by certain wave motions, by M. J. Boussinesq.-Note by M. Faye accompanying the presentation of celestial photographs obtained at Heidelberg by Dr. Max Wolf, Director of the Observatory. The photographs commented upon by M. Faye are those recently taken of a part of Cygnus, and that on which the trail of a new asteroid was detected; also a picture showing a shooting-star which The photocrossed the field of observation during exposure. graphs were taken by means of a portrait-lens 2 inches in diameter On the optical measure of high temperatures, by M. A. Crova.-Researches on the formation of planets and satellites memoir by M. E. Roger, presented by M. Jordan. The author has developed a complex relation connecting the distances of planets from the sun, and also one connecting the distances of planets from their satellites.-Observations of Swift's comet (1892 March 6), made with the Brunner equatorial of Lyons Observatory, by M. G. Le Cadet. Observations for position were made on April 3, 4, 8, 9, 11, and 15.-On differential invariants of a surface with respect to conformable transformations of space, by M. Arthur Tresse.-On the accuracy of comparisons of a mètre à bouts with a mètre à traits, by M. Bosscha.-Researches on the secondary wood of Apetales, by M. C. Houlbert.-On the relations existing between the form and nature of the beds of andalusite at Ariège, by M. A. Lacroix. It appears that at Ariège the form of the andalusite is characteristic in each bed to such an extent that, given a geological map of the region, it is possible to indicate a priori where the mineral would be found, and conversely, given a specimen of andalusite, the geological nature of the bed from which it was taken could be stated with very little chance of The facts described by M. Lacroix are thus as useful to the geologist as to the mineralogist.-On the loess of Turkestan, by M. Guillaume Capus. error. BRUSSELS. Academy of Sciences, March 5.-The following com- a single respiratory centre, isolated by two transverse sections In a former paper Bacterium Allii, by Dr. A. B. Griffiths. Dr. Griffiths described and named Bacterium Allii-a microThis Bacteria produces a green pigorganism found by him. ment, soluble in alcohol, and possessing a particular absorption spectrum. In the presence of albuminoids, Bacterium Allir gives rise to a crystallizable ptomaine, which furnishes the chloroplatinate, having the formula, according to analyses, (CH,,NHCI) Pt,Cl. The analysis of the base gave formula C10H1N, which corresponds to that of chloroplatinate. 17 a BOOKS, PAMPHLETS, and SERIALS RECEIVED. Books.-The Apodidae: H. M. Bernard (Macmillan)-Tanganyika: E. C. Hore (Stanf rd).-Epidemics, Plagues, and Fevers: Hon. Rollo Russell (Stanford).-Hand-book of Jamaica, 1892 (Stanford).-A Treatise on Physical Optics: A. B Basset (Bell).-The Landfall of Lief Erikson, A.D. 1000: E. N. Horsf rd (Boston, Damrell and Upham) -A Guide to Electric Lighting: S Bottone (Whittaker).- Elementary Lessons in Heat: S. E. Tilman, and edition (Gay and Bird).-Les Altérations de la Personnalité: A. Binet (Paris, Alcan). Thermodynamische Studien : J. W. Gibbs, translated by W. Ostwald (Leipzig, Engelmann)-English Botany, supplement to the 3rd edition. Part 1: N. E Brown (Bell).-Progressive Mathematical Exercises, 2nd series: A. T. Richardson (Macmillan). PAMPHLET.-The Wheat Plant, how it Feeds and Grows: W. Carruthurs (also 8 diagrams) (W. and A K. Johnston). SERIALS.-Proceedings of the Rochester Academy of Science, vol. i. Brochures I and 2 (Rochester, N Y.)-Brain, Part 57 (Macmillan).— Journal of the Bombay Natural History Society, No. 4 vol. vi. (Bombay). Journal of the Institution of Electrical Engineers, No. 97, vol. xxi. (Spon).-Bulletin of the New York Mathematical Society, vol. i. No. 7 (New York).-Physical Society of London, Proceedings, vol. xi. Part 3 (Taylor and Francis).-Proceedings of the Geologists' Association, vol. xii. Part 7 (Stanford) -Journal of the Royal Microscopical Society, April (Williams and Norgate)-A Manual of Orchidaceous Plants, Part 8 (Veitch).-Notes from the Leyden Museum, vol. xiv. Nos. 1 and 2 (Leyden, Brill)-American Journal of Mathematics, vol. xiv. No. 2 (BaltimoreTransactions of the Royal Society of Victoria, vol. ii. Part 2, 1891 (Melbourne).-Report of the Geological Survey of India, vol. xxv. Part I (Calcutta). CONTENTS. Theoretical Chemistry. By Prof. M. M. Pattison The Travels of a Painter of Flowers. By W. B. H. PAGE 601 602 603 Briggs: "Synopsis of Non-Metallic Chemistry' 604 604 Bonney: "The Year-book of Science 604 Handy Atlas of Modern Geography 605 Aurora.-Geo. M. Seabroke; Arthur Marshall; 605 605 606 606 Atmospheric 606 606 607 Sensitive Water Jets.-W. B. Croft Forestry in America. By Prof. W. R. Fisher Notes Our Astronomical Column: Spectrum of Nova Auriga ALSO Lime Light and Electric Lanterns, Projecting Microscopes, OPTICAL PROJECTION. BY LEWIS WRIGHT. Second Just Published by Longmans, 6s., net 45. 6d., Post free, 45. 10d. LEACH'S PATENT 16 RED LION STREET, NALDER BROS. & CO., CLERKENWELL, LONDON, E.C. NEW PATTERN BALLISTIC Resistance 10,000 Ohms. Prices and full particulars on application. Aneroid Barometer with Altitude Scale, Compass with Patent Dial and Thermometer for Air Temperatures (or a Clinical Thermometer may be substituted). PRICE £4 10s. to £7 10s. ILLUSTRATED PRICE LISTS POSTED FREE TO ALL PARTS OF THE WORLD. The most Perfect Instrument for the purpose for which it is NEGRETTI & ZAMBRA, intended. Price, with fine adjustment, £9. See Pamphlet Catalogue. W. I. CHADWICK, 2 ST. MARY'S STREET, MANCHESTER SCIENTIFIC INSTRUMENT MAKERS TO THE QUEEN, 38 HOLBORN VIADUCT. Branches: 45 CORNHILL; 122 REGENT STREET. Photographic Studio-CRYSTAL PALACE, Sydenham. Negretti & Zambra's Illustrated Catalogue, 1200 Engravings. Price 5. Ed. Telephone No. 6583. Telegraphic Address: "Negretti. London." THE VICTORIA UNIVERSITY. THE EXTERNAL EXAMINERS OF THE UNIVERSITY. ARCHIBALD BARR, D.Sc., Professor of Engineering in the University of Glasgow, Examiner in Engineering. MARCUS BECK, M.D, F.R.CS, Professor of Surgery in University E. G. BRAUNHOLTZ, M.A., Ph.D., University Lecturer in French, D. J. CUNNINGHAM, M.D., Professor of Comparative Anatomy in the Sir DYCE DUCKWORTH, M. D., F R.C. P., Lecturer on Clinical Medi- A. H. GREEN, M.A., F.R.S, Professor of Geology in the University of C. H HERFORD, Litt. D., Professor of English Literature in University College, Aberystwith, Examiner in English Language and Literature. W. M. HICKS, M. A., Professor of Mathematics in Firth College, Sheffield, Examiner in Mathematics. ROBERT MAGUIRE. M D., F.R.C.P., Lecturer on Pathology, St. Mary's Hospital, London, Examiner in Pathology and Morbid Anatomy. G. R. M. MURRAY, F.L.S., Senior Assistant, Department of Natural History, British Museum. Examiner in Botany. A. G. PESKETT, M.A., Fellow and Classical Lecturer, Magdalene College, Cambridge, Examiner in Classics. REGINALD L. POOLE, M.A., Ph D., Lecturer on Modern History in Jesus College, Oxford, Examiner in History. WILLIAM RAMSAY, Ph.D, F.R.S., Professor of Chemistry in University College, London, Examiner in Chemistry. EDMUND ROBERTSON, M.A., M.P. (late), Professor of Roman Law in University College, London, Examiner in Law. C. S. SHERRINGTON, M.B., Lecturer on Physiology in St. Thomas's Hospital, London, Examiner in Physiology. A. R. SIMPSON, M D., F. R.C. P., Professor of Midwifery in the University of Edinburgh, Examiner in Obstetrics and Diseases of Women. THOMAS STEVENSON, M.D., F.R.C.P., Lecturer on Chemical and Medical Jurisprudence, Guy's Hospital, London, Examiner in Forensic Medicine and Public Health. RALPH STOCKMAN, M.D., Examiner in Materia Medica and Pharmacy and Pharmacology and Therapeutics. + D'ARCY W. THOMPSON, B.A., Professor of Zoology in University College, Dundee, Examiner in Zoology. JAMES WARD, M.A., Sc.D., Lecturer on Philosophy in Trinity College, Cambridge, Examiner in Philosophy and Political Economy. The Examiners against whose names a dagger (4) is placed retire at the end of November. Applications are invited for the posts they now fill, which should be sent in on or before NOVEMBER 28, and may be accompanied by Testimonials (Copies only) or References, at the Candidate's discretion. The appointments will be for Three Years, at the expiration of which Examiners are not eligible for re-election. For further Particulars, apply to Manchester. October 1891. BALLIOL COLLEGE, CHRIST CHURCH, A. T. BENTLEY, M.A., Registrar. AND TRINITY COLLEGE, OXFORD. NATURAL SCIENCE SCHOLARSHIPS AND EXHIBITIONS. A combined Examination for Natural Science Scholarships and Exhibitions will be held by the above Colleges, beginning on TUESDAY, NOVEMBER 17. 1891. Three Scholarships and Two Exhibitions will be offered, the Scholarships being worth £80 a year. The subjects for examination will be Physics, Chemistry, and Biology, but Candidates will not be expected to offer themselves in more than two of these. Particulars may be obtained by application to A. VERNON HARCOurt, Christ Church. Oxford. BEDFORD COLLEGE, LONDON 8 and 9 YORK PLACE, BAKER STREET, W. The HALF TERM will BEGIN on THURSDAY, NOVEMBER 12. All inquiries to be made of LUCY J. RUSSELL, Honorary Secretary. THE AGRICULTURAL COLLEGE, PRINCIPAL DR. H. J. WEBB, B.Sc. Thorough practical and scientific Training in Agriculture. Preparation for the Colonies. Students gained the First, Third, and Fourth Scholar. ships of the Royal Agricultural Society, 1888; First in Agriculture Junior Scholarships. 1889: First in Agriculture Senior Scholarships, 1890 CONCHOLOGY. New and Interesting Shells from New Guinea, Borneo, Philippine Islands, &c. COLLECTIONS PURCHASED. All kinds of Glass-Topped Boxes, &c., at Moderate Prices. HUGH FULTON, Dealer in Recent Shells, 89 FULHAM ROAD LONDON, S.W. LIVING SPECIMENS FOR THE MICROSCOPE. Volvox globator, Conochilus volvox, Melicerta ringens, Lophopus crystallinus, and other specimens of Pond-life-Amoeba, Vorticella, Hydra, Chara, &c. 15. Fer Tube, Post Free. THOMAS E. BOLTON, FARLEY ROAD, MALVERN LINK, WORCESTERSHIRE. MODELS OF DIAMONDS. As exhibited in the Loan Collection in South Kensington 1.-Facsimile of 28 of the most celebrated White and Coloured Diamonds, executed in Crystal Glass, of great lustre. to which has just been added a Model of the Black (unique) Diamond of Punnah, in the possession of the Maharajah of Punnah, in handsome Morocco Case with descriptive Catalogue. Price £10 10s. 2-30 Models natural Crystals of Diamonds and Coloured Precious Stones, artistically and beautifully cut in imitation of originals, exhibited in Paris Exhibition of 1878, and obtained the Bronze Medal: in handsome Morocco Case. Price £6 65. Richly gilt Model and facsimile of the "Welcome" Gold Nugget, of Australia, largest known. Original weight 2166 oz. Value of the Gold, £8376 10s. 1od. Price £3 35., or in handsome Glass Shade, 22 x 11, £5 5. Set of imitations of "Precious Stones" in Morocco Case, 48 sp., Price 305. Address-ROBERT F. DAMON, Weymouth. F. H. BUTLER, M.A. Oxon., Assoc.R.S.Mines, NATURAL HISTORY AGENCY, 158 BROMPTON ROAD, LONDON, Dealer in Rocks, Minerals, Fossils, and other Objects of Scientific Interest. Now on view: numerous recently acquired Jurassic fossils, Chalk Echinoderms, including Marsupites from Burpham; a fine series of palatal teeth of Halodus, Sanda'odus, Oracanthus, Tomodus, Deltodus, and Orodus, besides a large collection of well-characterized corals from the Black Rocks of Clifton, Bristol, now no longer worked; also excellent examples of Tremadoc Trilobites, e.g. species of the genera Neseuretus and Angelina, from Garth, Og of Velvet, and other classical localities; and Devonian fish-remains from Caithness and Banff. Among the recent additions to the stock of minerals are various old Cornish species, and a few Gloucestershire Celestines of abnormal habit. TO GEOLOGICAL, &c., STUDENTS. JAMES R. GREGORY can now supply Special Sets of Microscopic Slides and Sections to illustrate Physiography and Geology, prepared expressly for him in the best manner. Series A contains 6 Slides (Physiography) in Case, 6s. 6d.; Post, 2d. 12 Slides 12s. 6d. ; 3d. 18s. Post free. 12 Slides, Sedim. and Metam. Rocks, in Case, 18s. Post free. B (ditto) C 12 Slides, Typ. Ign. Rocks D " Lists of Contents of these Sets Free on application. All Sections in General Lists of Rock Sections. Several Hundred Varieties many rare and interesting. REDUCED to 18. 6d. EACH. Collections, Specimens, Apparatus, &c., as usual. JAMES R. GREGORY, 88 CHARLOTTE STREET, FITZROY SQUARE, W. MINERALOGY. SAMUEL HENSON, 97 REGENT STREET, LONDON, W. ESTABLISHED 1840. Late 277 STRAND. Choice Mineral Specimens, Gem Stones, Carved Opals, Polished Agates, Rock Crystal Balls, Fossils, Rocks, and Rock Sections. LATEST ARRIVALS. Fine Native Silvr with Green Blende, Orange Yellow Wulfenites, Brown Vanadinite. large series of beautiful Mocha Stones, very interesting and beautiful groups of Crystallized Calcite, Barytes, and Specular Iron with Quartz. MICRO-PETROLOGY. Rock Sections for the Microscope, of special value and interest :-Por phyritic Basalt, Lion's Haunch, Edinburgh; Dlerite with Porphyritic Augite. Crawford John, Lanarkshire; Perlitic Pitchstone, Saxony; Pikrite, Inchcolm, Firth of Forth; Thulite, Norway; Siliceous Oolite, Pennsyl vania; a Siliceous Rock with a perfect oolitic structure. Is. 6d. each; extra large Sections, Is. 9d. and 2s. Collections of Minerals and Rocks for Prospectors and Students. THOMAS D. RUSSELL, 78 NEWGATE STREET, LONDON, E.C. STANLEY Mathematical Instrument Manufacturer to H.M. Government. 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In contact with the glands at the moment they are excited by the act of sucking, the glycerine in these agreeable confections becomes actively healing. Sold only in Boxes, 74d., and Tins 1s. 1d., Labelled: JAMES EPPS & CO., Homœopathic Chemists, LONDON. HOLLOWAY'S PILLS THIS MEDICINE THE ZOOLOGIST : A MONTHLY MAGAZINE OF NATURAL HISTORY. Third Series. Edited by J. E. HARTING, F.L.S., F.Z.S., member of the British Ornithologists' Union; contains Original Articles by well-known naturalists in every branch of zoology; habits of animals; arrival and departure of migratory birds; occurrence of rare birds; distribution and migration of British fresh-water fish; new or rare marine fish; local aquaria; British reptiles; British land and fresh. water mollusca, with remarks on the haunts and habits of the species; and other matters of general interest to those who delight in natural history. Reports of the Linnean, Zoological, and Entomological Societies. Reviews of natural history books. Occasional translations from foreign zoological journals of important and interesting articles in various branches of zoology. There are occasional woodcuts. SIMPKIN, MARSHALL, & CO., Stationers' Hall Court. Yearly. Half-yearly. Quarterly : 900 I IO 6 0 15 6 080 I 12 6 O 16 6 0 8 6 CHARGES FOR ADVERTISEMENTS. Price 18. 3d. Subscription for One Year, payable in advance, 125. London: WEST, NEWMAN, & CO., 54 Hatton Garden, E.C. OFFICE: 29 BEDFORD STREET, SIRAND, W.C. RECENT VOLUMES in the INTERNATIONAL SCIENTIFIC SERIES. Crown 8vo, 55. each. COLOUR BLINDNESS AND COLOUR PERCEPTION. By F. W. EDRIDGE-GREEN, M.D. With 3 Coloured Plates, illustrating misconceptions of Colour which, within the Author's knowledge, have occurred to the "colour-blind." INTRODUCTION TO FRESH-WATER ALGE. With an Enumeration of all the British Species. By M. C. COOKE. 13 Plates. "Fills a distinct vacuum in botanical literature."-Academy. "We can recommend this as a useful work of reference." Spectator. 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THE PRACTICAL TELEPHONE HANDBOOK and GUIDE to the TELEPHONIC EXCHANGE. By JOSEPH POOLE (Wh. Sc. 1875), Chief Electrician to the late Lancashire and Cheshire Telephonic Exchange Company. With 227 Illustrations, 35. 6d. [Ready. 'Contains readable accounts of all the best-known and most widelyused instruments, together with a con-iderable amount of fresh information not hitherto published in book form."-Electrician. |