NEW AND INTERESTING MICROSCOPIC OBJECTS. Bacillus Typhi Abdominalis Bacillus of Diphtheria (L fler) False Membrane from a Child Mildew in Stem of Wheat (Puccinia graminis) Fertile Spike of Chara Fungus on Leaf of Potato (Peronospora infestans) £ s. d. 3:0 3 O Group of 12 different Species of Foraminifera on one Slide, very Stem and Petiole of Virginia Creeper, showing defoliation www 6. о I Protonema of Moss Type-slide of 400 different Species of Diatoms, the name photo- CLASSIFIED LIST, representing a Stock of 40,000 First-class Objects sent post free on application. WATSON & SONS TRIPOD EDINBURGH STUDENT'S MICROSCOPE is suitable for investigations with the highest powers. The qu W. WATSON & SONS, OPTICIANS TO HER MAJESTY'S GOVERNMENT, 60 Prize Medals Awarded to the Firm. BE CAREFUL TO ASK FOR FRY'S PURE CONCENTRATED COCOA. Printed by RICHARD CLAY AND SONS, LIMITED, at 7 and 8 Bread Street Hill, Queen Victoria Street, in the City of London, and Pa MACMILLAN AND Co., at 29 Bedford Street, London. W.C., and 112 Fourth Avenue, New York.-THURSDAY, January rat NATURE A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. NEW CATALOGUE OF ANTERNS AND SLIDES, JUST PUBLISHED, 6d. POST FREE, ontains NEW SETS OF LANTERN SLIDES on HISTOLOGY. (Photo-micrographs.). BEES AND BEE CULTURE. (By T. W. CowAN, Esq.) PROJECTING MICROSCOPES PROJECTING POLARISCOPES, NEWTON & CO., (BY SPECIAL APPOINTMENT TO THE ROYAL INSTITUTION) FLEET STREET, LONDON. NOW READY.-1s., Post Free. 16 RED LION STREET, CLERKENWELL, LONDON, E.C. CO., OUR NEW CATALOGUE OF ELECTRICAL TESTING AND SCIENTIFIC INSTRUMENTS IS NOW READY. www NALDER BROS. & Co. NEGRETTI AND ZAMBRA'S FFIN'S ILLUSTRATED CATALOGUE OPERA, RACE, & FIELD GLASSES OF EVERY DESCRIPTION. 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. UNIVERSITY OF EDINBURGH. The University Court of the University of Edinburgh will on Monday, February 13 next, or some subsequent day, proceed to the appointment of an additional Examiner in each of the following Departments, viz (1) In the Department of CHEMISTRY for Graduation in Arts, Science and Medicine, at a salary of £75 per annum. (2) In the DEPARTMENT OF PUBLIC HEALTH for Graduation in Science, who shall examine in LABORATORY WORK for the First Examination for the Degree of B.Sc. in Public Health, at a salary of £40 per annum, a sum of £10 a year for travelling and other expenses is allowed in the case of each additional Examiner, if not resident in Edinburgh, or the immediate neighbourhood. Each applicant should lodge with the undersigned, not later than Monday, February 6 next, sixteen copies of his application and sixteen copies of any testimonials he may desire to present. One copy of the application should be signed. Applicants who send in Testimonials must not send more than M. C. TAYLOR, Secretary, Univ. Court. four. University of Edinburgh, January 23, 1893. UNIVERSITY OF EDINBURGH. The University Court of the University of Edinburgh will on Monday, February 13 next, or some subsequent day, proceed to the appointment of an additional Examiner, who shall examine in Botany for Graduation in Arts, Science, and Medicine in the University. The Salary is £75 per annum with an allowance of £10 a year for travelling and other expenses, in the case of an Additional Examiner not resident in Edinburgh, or the immediate neighbourhood. Each applicant should lodge with the undersigned not later than Monday, February 6 next, sixteen copies of his application, and sixteen copies of any Testimonials he may desire to present. One copy of the application should be signed. Applicants who send in Testi nonials must not send more than four. M. C. TAYLOR, Secretary, Univ. Court. University of Edinburgh, January 23, 1893. ST. THOMAS'S HOSPITAL MEDICAL SCHOOL, ALBERT EMBANKMENT, LONDON, S.E. TWO NATURAL SCIENCE SCHOLARSHIPS of 150 and £60 respectively, open to First-year Students on entrance in OCTOBER. Special Classes in CHEMISTRY and PHYSICS, BOTANY and ZOOLOGY, are held throughout the Year, and may be joined at any time. Free Scholarships are given to distinguished Pupils of MERCHANT TAYLORS' SCHOOL, the CITY OF LONDON SCHOOL, and EPSOM COLLEGE. Other Scholarships and Prizes of the Value of upwards of £300, the Mead Medal for Medicine, and the Cheselden Medal for Surgery are awarded annually. The Solly Medal and Prize. biennially, for Surgical Reports. Prospectuses and all Particulars may be obtained from the Medical Secretary, Mr. GEORGE RENdle. G. H. MAKINS, Dean. ST. BARTHOLOMEW'S HOSPITAL AND COLLEGE. INSTRUCTION IN PRELIMINARY SCIENCE. Courses of Lectures and Practical Laboratory Instruction in BIOLOGY, CHEMISTKY, and PHYSICS, adapted to the requirements of Students studying for the PRELIMINARY SCIENTIFIC (M.B.) EXAMIN ATION of the University of London are given by the Lecturers throughout the year. Special arrangements are made for Students wishing to go up for Examination in January and for the se who have recently matriculated. Fee for the whole Course of Instruction, £18 185. For Particulars apply Personally or by Letter, Dr. T. W. SHORE, Warden of the College, St. Bartholomew's Hospital, E.C. GRESHAM COLLEGE, BASINGHALL STREET, E.C. A further Course of Lectures on the "Laws of Chance will be delivered by KARL PEARSON, M.A., Greshan Professor of Geometry, on the Evenings The Lectures, which will be of an Elementary Character, are free to the public, and c mmence at 6 p.m. of JANUARY 31, FEBRUARY 1, FEBRUARY 2, and FEBRUARY 3. ROCKS AND MINERALS. PENYWERN HOUSE MILITARY AND ENGINEERING COLLEGE, 2 PENYWERN ROAD, EARL'S COURT, S.W. PRINCIPAL-G. W. DE TUNZELMANN, B.Sc., M.I.E.E. Telegrams-" Tunzelmann, London." PUBLIC SERVICE AND UNIVERSITY DEPARTMENT. -For students preparing for the various branches of the Public Service or for Scholarships at, or entrance into, the Universities and Hospitals. ENGINEERING DEPARTMENT -The Complete Courses qualify Students for entry into Cooper's Hill, the Central Institution, the Royal College of Science and into Engineering Works. Special Courses in Electrical Engineering. The extensive Physical and Chemical Laboratories are fitted up in the most complete manner for both Elementary and Advanced Work. The College is supplied with very complete Geological Collections for practical instruction. Students are regularly sent to the College by Leading Engineers and Scientific Authorities, whose Names are given in the Prospectus. CONTAINING MANY NEW AND INTERESTING SPECIMEN FROM COLORADO, AUSTRALIA, NEW ZEALAND, BRAZ”. HUNGARY, SCOTLAND, WALES, CORNWALL, &c. Now Reduced to 1s. 6d. each. All one Price. SPECIAL SETS FOR PHYSIOGRAPHY. Also Lists of Collections of Minerals, Rocks, and Fossils, Apparams all a Appliances, Single Minerals, Chemical Minerals, Empty Calizets, ko NOVELTIES IN PRECIOUS STONES. ALL LISTS FREE OF JAMES R. GREGORY, 88 CHARLOTTE ST., FITZROY SQUARE, W TO SCIENCE LECTURERS. ON SALE BY See Mr. HUGHES'S PATENT COMBINATION OPTICAL LAN MACMILLAN & BOWES, TERN, used by late W. LANT CARPENTER, Esq., Prof. FORBES. New Triple constructed for B. J. MALDEN, Esq., this season. New Oxyhydrogea 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 Illusrated Catalogue 300 pages, 15.; Postage, 5d. Smaller do., 6d. Pamphets Free-HUGHES, SPECIALIST, Brewster House, Mortimer Road, Kingsland, N. MITRA FULtoni, CONCHOLOGY. & CAMBRIDGE. COMPTES RENDUS HEBDOMADAIRES DES SÉANCES DE L'ACADÉMIE DES SCIENCES. Vols. 4 to 23, 26 to 33, 42, 43, 45 to 87, 90, 91. 28 Vols. Half Calf, the rest in Numbers. (4 Tables, 2 Titles, and 7 Numbers wanting.) In all 75 Vols. 1837 to 1880. 10 10s. A long Series of this important Work, containing Articles by Aoust, Arago, Bailly, Berthelot, Bertrand, Biot, Cauchy, Chasles, Dupin, Encke, Faye, Gauss, Hermite, Jacobi, Jamin, Jordan, Lacroix, Leverrier, Libri, Moigno, Monge, Poinsot, Poisson, Poncelet, Saint Venant, Secchi, Serret, Sylvester, Verdet, and many others. H. F. has just acquired the grand COSMOS. Revue encyclopédique hebdomadaire des progrès des Sciences et de leurs applications aux Arts et l'Industrie. Fondée par COLLECTIONS OF MINERALS, For the Use of Students, Science Teachers, Prospectors, &c., and to 50 Specimens, 10s. 6d. ; 100 do., 21s.; 200 do., 42s. New Price List of Minerals, Rocks, and Stratigraphical Seriesof Fossils Post Free. ROCK SECTIONS for the MICROSCOPE from is. 6d. each, Pos Free. CABINETS, GLASS-CAPPED BOXES, TRAYS, HAMMERS, &c., THOMAS D. D. RUSSELL, 78 NEWGATE STREET, LONDON, E.C. 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:-A large and varied assortment of Rock-specimens recently obtained from West Shropshire and North Wales, including numerous Diabases, variegated Volcanic Ash, Agglomerate, and Breccia, Quartzite from the Stiper Stones, Spotted Schists, and Granitite; also, a Collection of exceptionally fine polished examples of Labradorite, Green Aventurine Quartz, Agate, Jasper, and other Ornamental Stones; Pyrite after Pyrrhotire from Cornwall: Chalk Polyzan from Kent; and a Consignment of EDUCATIONAL TIMES. A Monthly Journal of Education, Science, and Literature. Vols. 4 to 43. 1850 to December 1890. 41 Vols. in 20, Cloth, and 2 in Numbers. £4 10S. Sets of this important Journal are very scarce. It contains valuable mathematical questions and solutions, the republication of which, in book form, did not commence until 1864. Pages 25 to 48 of Vol. 4, and the Title and Contents of Vol. 40 are wanting; otherwise it is perfect. THROAT AND COUGH Soreness and Dryness, Tickling and Irritation, inducing Cough, and affecting the Voice. For these symptoms use EPPS'S GLYCERINE JUJUBES. 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., Homoeopathic Chemists, LONDON. SECOND YEAR of ISSUE. READY SHORTLY, PRICE 7s. 6d. The Year-Book of Science. EDITED BY L. REEVE & CO.'S NEW WORKS The PHYSIOLOGY of the INVERT BRATA. By A. B. GRIFFITHS, Ph.D., F.R.S.(Edin) With 81 Illustrations, 155. net. Complete int volume. The HEMIPTERA HETEROPTERA the BRITISH ISLANDS. By EDWARD SAUNDERS Small Edition, with a Structural Plate, 145. Large Edin Coloured Plates, 48s. net. The LEPIDOPTERA of the BRITIS ISLANDS. By CHARLES G. BARRETT, F.E.S. 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