་ NEW AND INTERESTING MICROSCOPIC OBJECTS. Bacillus Typhi Abdominalis Bacillus of Diphtheria (Lffler) False Membrane from a Child Mildew in Stem of Wheat (Puccinia graminis) Fertile Spike of Chara Fungus on Leaf of Potato (Peronospora infestans) о O о Group of 12 different Species of Foraminifera on one Slide, very perfect ... Stem and Petiole of Virginia Creeper, showing defoliation Sieve Tubes in Vegetable Marrow Type-slide of 400 different Species of Diatoms, the name pèxte Group of about 150 Diatoms from Sendai, Japan, very perfect CLASSIFIED LIST, representing a Stock of 40,000 First-class Objects sent post free on application. MICROSCOPES AND APPARATUS. WATSON & SONS' TRIPOD EDINBURGH STUDENT'S MICROSCOPE is suitable for investigations with the highest powers The para 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. "OPTIMUS" MAGIC LANTERNS "OPTIMUS" ENLARGING APPARATUS Adapted for use with limelight. For dissolving, two lanterns are necessary Printed by RICHARD CLAY AND SONS, LIMITED, at 7 and 8 Bread Street Hill, Queen Victoria Street, in the City of London and NEW CATALOGUE OF LANTERNS AND SLIDES, JUST PUBLISHED, 6d, POST FREE, Contains NEW SETS OF LANTERN SLIDES on HISTOLOGY. (Photo-micrographs.), PROJECTING MICROSCOPES PROJECTING POLARISCOPES, NEWTON & & CO., (BY SPECIAL APPOINTMENT TO THE ROYAL INSTITUTION) FLEET STREET, LONDON. NOW READY.-1s., Post Free. RIFFIN'S ILLUSTRATED CATALOGUE Now ready, Negretti & Zambra's Encyclopaedic Catalogue of Mathematical, Philosophical, Op- Royal 8vo, Cloth, Gilt Lettered, price 5s. 6d. NEGRETTI & ZAMBRA, Opticians and Scientific Instrument Makers To Her Majesty the Queen, HOLBORN VIADUCT, 45 CORNHILL, & 122 REGENT STREET, LONDON. PRICE LISTS FREE BY FOST TO ALL PARTS OF THE WORLD. The University Court invite applications from Candidates for FOUR EXAMINERSHIPS for DEGREES in MEDICINE to which Appointments are about to be made. In filling up these Vacancies the Court will take into account the Special Qual fications of Candidates for one of the Appointments to Examine in PATHOLOGY, for another to Examine in SURGERY, for a third to Examine in MEDICINE, and for a fourth to Examine in PHYSIOLOGY. The Annual Fee in each case is £30, and the Term of Office is till DECEMBER 31, 1896. Candidates should lodge 20 Printed Copies of their Applications and Testimonials with the Subscriber, on or before MARCH 11, 1893. ALAN E. CLAPPERTON, Secretary of the Court. 91 West Regent Street, Glasgow. 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. 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-" Tunselmann, 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. QUARTZ FIBRES. FOR SUSPENDING GALVANOMETER NEEDLES, &c. (See Phil. Mag., vol. xxiii. p. 489). The Advertiser, who makes the above for Prof. C. V. Boys, is prepared to send a Frame containing 8 Fibres (each 11 inches long), for 6s. Special lengths and diameters can be supplied by arrangement. W. WATSON, 20 ROSSETTI MANSIONS, S.W. BIOLOGY.-A London Graduate coaches in BIOLOGY for all Exams.-"F.L.S.," NATURE Office. ALBERT EDWARD JAMRAC (Late CHARLES JAMRACH), 180 ST. GEORGE STREET EAST. Implements of Savage Warfare, Idols, Sacred Masks, Peruvian Netsukis, China, Lacquer, Gongs, Shells, and other Curios F. H. BUTLER, M.A. Oxon., Assoc.R.S.M NATURAL HISTORY AGENCY, 158 BROMPTON ROAD, LONDON Dealer in Rocks, Minerals, Fossils, and other Ot of Scientific Interest. NOW ON VIEW:-A large and varied assortment of Rock-speci cently obtained from West Shropshire and North Wales, including Diabases, variegated Volcanic Ash, Agglomerate, and Brecca from the Stiper Stones, Spotted Schists, and Granitite; also, a C exceptionally fine polished examples of Labradorite, Green A Quartz, Agate, Jasper, and other Ornamental Stones; Pyrite afir tite from Cornwall: Chalk Polyzoa from Kent; and a Comm Ostrich Eggs. COLLECTIONS OF MINERALS ROCKS, OR FOSSILS, For the Use of Students, Science Teachers, Prospectors, &c., as illustrate the leading Text-books, in Boxes, with Trays. 50 Specimens, 10s. 6d.; 100 do., 21s.; 200 de New Price List of Minerals, Rocks, and Stratigraphical Series": Post Free. ROCK SECTIONS for the MICROSC PE from 15. 6d. each, P CATALOGUES Gratis. CABINETS, GLASS-CAPPED BOXES, TRAYS, HAMMER always in Stock. THOMAS D. RUSSELL 78 NEWGATE STREET, LONDON, EC MINERALOGY. SAMUEL HENSON, 97 REGENT STREET, LONDON, W ESTABLISHED 1840. Late 277 ST Choice Mineral Specimens, Gem Stones, Carved Opals, Polish Rock Crystal Balls, Fossils, Rocks, and Rock Sections. LATEST ARRIVALS. Mr. HENSON has just received some good Groups of Japanes S interesting Quartz Crystals inclosing Rutile and other Substa Very Fine Rock Crystal Ball, 4 inches diameter, perfectly free F small Crystal Balls, with inclosures, Rock Crystal Carvings. 1Crystallised Hydrargillite, Bertrandite, Polybaste. Dian trichite, Arizona, Yellow Terminated Beryls, Geikielite, and l Diatomaceous Earth from Hakodati, Japan. WORKS BY SIR ARCHIBALD GEIKIE, F.R.S. XT-BOOK OF GEOLOGY. By Sir ARCHIBALD GEIKIE, LL.D., F.R.S.; ASS-BOOK OF GEOLOGY. Medium 8vo, 28s. By the Same. TLINES OF FIELD GEOLOGY. By the Same. New and Revised Edition. Extra Fcap. 8vo, 3s. 6d. EMENTARY LESSONS IN PHYSICAL GEOGRAPHY. By the Same. HE TEACHING OF GEOGRAPHY. Suggestions regarding Principles and Methods for the use of Teachers. By the Same. Globe 8vo, 25. [Geographical Series. OGRAPHY OF THE BRITISH ISLES. By the Same. Pott 8vo, IS. [Geographical Series. E SCENERY OF SCOTLAND VIEWED IN CONNEXION WITH ITS PHYSICAL GEOLOGY. With a Geological Map and Illustrations. By the Same. Second Edition. Crown 8vo, 12s. 6d. NEW WORK BY A. T. SCHOFIELD, M.D. ELEMENTARY PHYSIOLOGY & STUDENTS By ALFRED T. SCHOFIELD, M.D., M.R.C.S., &c., Author of "Physiology for Schools," &c. With Two Coloured Plates and numerous Wood Illustrations. We do not recall any volume of the kind which has made a more favourable impression upon us; and the illustrations and index are alike worthy of the text."-Leeds Mercury. CASSELL & COMPANY, Limited, SCIENCE INSTRUMENTS. An Illustrated, Priced, and Descriptive Catalogue of the Instruments of Science which are used in teaching and demonstrating every branch of Physical Science, as well as of the Instruments which are used in Original Research and in the applications of Science to Technical Industries and Pursuits. PRICE TO NON-CUSTOMERS, 2s. 6d. POST FREE. CONTENTS of No. 13, for MARCH 1893 NOTES AND COMMENTS. 1. THE NUCLEUS IN SOME UNICELLULAR ORGYBy Rev. W. H. DALLINGER, LL.D., F.R.S. II. ARE GREAT OCEAN DEPTHS PERMANENT III. THE ORIGIN AND CLASSIFICATION OF ISLAN IV.-BIOLOGICAL THEORIES.-III. THE RECAPITULA VI.-ANIMAL TEMPERATURE. By M. S. PEMBERY. NEWS OF UNIVERSITIES, MUSEUMS, AND SOCIETIES. LONDON AND NEW YORK: MACMILLAN $ PUBLICATIONS OF THE ZOOLOGI SOCIETY OF LONDON. Transactions, Vol. XIII., Part V., price 155. containing "C" the Anatomy of the Anthropoid Apes." By Frank E. Bet Prosector to the Society and Lecturer on Biology at Guy's Hi nine plates. To be obtained at the Society's Office (3, Hanover → or through any bookseller. |