In January, 1907, the Senate will proceed to appoint a whole time officer 25 REGISTRAR of the UNIVERSITY on a salary of Rs.800 per mensem, rising to Rs.1oco in five years by four annual increments of Rs. 50. Appli cations for the post must reach the undersigned on or before December 17, 1906. Candidates are required to send printed copies of their testimonials. Canvassing will be considered a disqualification. The Registrar will be appointed in the first instance for five years only, but at the end of every such term he may be re-appointed. He must be a graduate of position with experience of University affairs. He may be a member of the Senate, but not of the Syndicate. The duties of the Registrar will be as follows:- (a) To be the custodian of the Records, Library, Common Seal, and such other property of the University as the Syndicate will commit to his charge. (b) To act as Secretary to the Syndicate and to attend all meetings of To conduct the official correspondence of the Syndicate and the To issue all notices convening meetings of the Senate, Faculties, (e) To perform such other work as may be, from time to time, pre- It is competent to the Syndicate to grant to the Registrar, on full pay, leave of absence for one month in a year, or for an accumulated period not exceeding four months in five years. It is also competent to the Syndicate to grant him, on half pay, leave of absence which may be added to the period of leave on full pay for a period not exceeding eight months in five years. It is competent to the Syndicate to grant to the Registrar a gratuity or pension regulated as follows: (a) After a service of less than ten years, a gratuity not exceeding one month's salary for each completed year of service. (5) After a service of not less than ten years up to twenty-five years, a pension not exceeding one-sixtieth of the average salary (ie., the average calculated upon the last three years of service) multiplied by the number of years of completed service. (c) The pension will, in no case, exceed Rs 5000 per annum. In case of misconduct or neglect of duty, the Registrar shall be liable to suspension by the Syndicate, and to dismissal by the Senate on the report of the Syndicate. The selected candidate will be required to join his post by the middle o February, 1907. He will continue to hold office not later than March 31, 1912. BALLIOL COLLEGE, CHRIST CHURCH, AND TRINITY COLLEGE, OXFORD. A Combined Examination for Natural Science Scholarships and Exhibitions will be held by the above Colleges, beginning on TUESDAY, DECEMBER 4, 1906. Three Scholarships and two Exhibitions will be offered; with one exception the value of these endowments will be £80 a year. The Subjects for Examination will be Physics, Chemistry, and Biology. AGRICULTURAL COLLEGE, Close to Seaside and Lake District. Situated in one of the finest Stock-raising Districts of the Country. Six farms, dairy, and workshops. Principal J. SMITH HILL, B.A., B.Sc. (Lond.), Assoc. Surveyors' Institution. TUITION BY CORRESPONDENCE (Residence abroad no impediment). For MATRICULATION, B.A., B Sc., RESPONSIONS, SCHOLAR. 1 he staff includes graduates of Oxford, Cambridge, London, and Royal Universities. Address Mr. J. CHARLESTON, E.A., Burlington Correspondence College, Clapham Common, London, S. W. Science Teacher required, Elementary In January, 1907, the Senate will proceed to appoint a salaried INSPECTOR for the purpose of inspecting Colleges affiliated to this University. Applications for the post are hereby invited, and they must reach the undersigned on or before December 17, 1906. Candidates are required to send printed copies of their testimonials. Canvassing will be considered a disqualification. The appointment will be made by the Senate subject to the approval of Government. The Inspector of Colleges will be appointed in the first instance for five years only, but at the end of every such term he may be re-appointed. He must be a person of high academic standing and one possessing some experience of Indian Colleges. He will be a whole-time officer of the University, and his salary will be Rs. 800 per mensem, rising to Rs. 1000 in five years by four annual increments of Rs. 50. He may be a Fellow of the University, but must not be a member of the Syndicate. The duties of the Inspector of Colleges will be : (a) To report on Colleges applying for affiliation. (b) To inspect affiliated Colleges, and (c) To inspect such Schools as may, from time to time, be indicated by the Syndicate. It is competent to the Syndicate to grant to the Inspector of Colleges, on full pay, leave of absence for one month in a year, or for an accumulated period not exceeding four months in five years. It is also competent to the Syndicate to grant him, on half pay, leave of absence which may be added to the period of leave on full pay for a period not exceeding eight months in five years. The Inspector of Colleges may, with the permission of the Syndicate, avail himself of the College vacations. The Syndicate may grant to the Inspector of Colleges a gratuity or pension regulated as follows: (6) (a) After a service of less than ten years, a gratuity not exceeding one month's salary for each completed year of service. After a service of not less than ten years, up to twenty-five years, a pension not exceeding one-sixtieth of the average salary (¿.e., the average calculated upon the last three years of service) multiplied by the number of years of completed service. (c) The pension will, however, in no case, exceed Rs.5000 per annum. In case of misconduct or neglect of duty, the Inspector of Colleges will be liable to suspension by the Syndicate and to dismissal by the Senate on the report of the Syndicate. The selected candidate will be required to join his appointment by the middle of February, 1907. He will continue to hold office not later than the Annual Meeting of the Senate in January, 1912. Wanted, a Teacher for Classes in Woodwork, Metal Work, and Drawing. Must satisfy the Department of Agriculture, Dublin, as to competency. State experience and salary expected. None need apply except such as have a facility in controlling boys and communicating knowledge to them.-Address reply to "S. S. H.," Messrs. EASON & SON, Ltd., Donegall Street, Belfast. To Tutorial Colleges. A University Graduate Mining Engineer offers services to Correspondence College to give instruction in mining on scientific basis.-" Engineer," c/o NATURE Office. Science Graduate, sometime University Lecturer in Chemistry, good linguist, desires part-time tutorial, journalistic, or consulting work.-Replies to "X.," c/o NATURE. Chemistry, Hygiene and Physiology. Two afternoons each week from, Consulting Chemist requires Pupil.—Apply Mondays, 2 to 6, Fridays, 2 to 5.-State terms and experience by letter to Box No. 239, STREET'S, 8 Serle Street, London, W.C. R. A. EARP, Buckfastleigh, Devon. WILLIAMS & NORGATE. PART I. NOW READY. Will be completed in FOUR PARTS, demy 40), sewn, 15s. each net. Cloth, 16s. 6d. net. SUBSCRIPTION for the Four Parts tayable in advance, £2 14s., sewn. Cloth, £3. THE SURGICAL ANATOMY OF THE HORSE. By JNO. T. SHARE-JONES, M.R.C. V.S., Lecturer in Charge of the Department of Veterinary Anatomy in the University of Liverpool; Formerly Tutor in Surgery and Demonstrator of Anatomy at the Royal Veterinary College, London, &c. The Work is well in hand, and will be completed as soon as practicable. It will comprise above 100 full-page plates, a large number of which will be in colours. Each Part will consist of about 160 pages of text. Descriptive prospectus, containing a specimen of colour and black and white plates, post free upon application. The Work is divided into four parts : WITH BRIEF DESCRIPTIVE TEXT BY JNO. T. SHARE-JONES, M.R.C.V.S. FORE LIMB, INNER AND OUTER ASPECTS. HIND LIMB, INNER AND OUTER ASPECTS. The models were originally prepared by Mr. Share-Jones for his own use, and it was only afterwards that their extreme value for almost every member of the Veterinary Profession was realised. The persons to whom they will prove of more especial value are: Students of Senior Anatomy: Students of Surgery: Practitioners with Pupils will find the models particularly useful in demonstrating the superficial anatomy of the limbs during examination for soundness, &c., but finally they are of interest to all students of the Horse for comparing the models with the living subject; the superficial markings and the underlying structures that cause them can be studied, and thus knowledge of the greatest value obtained. 1 Set, Four Limbs, 20 Guineas. Or separately: Hind Limb, Inner Aspect, £6 6s. Outer Aspect, £6 6s. Fore Limb, Inner Aspect, £6 16s. 6d. Outer Aspect, £6 16s. 6d. LIVERPOOL UNIVERSITY INSTITUTE OF COMMERCIAL RESEARCH Just Ready. No. 3. 25. net. Botanic Gardens at Konakry, French Guinea. By Viscount MOUNTMORRES and LEO FARMAR. Notes on a District of the Gold Coast. By FRANCIS Analysis of Mollendo Biscuit Rubber. By D. SPENCE. The Possibilities of Ramie. By D. EDWARDS-RADCLYFFE THE IRISH NATURALIST. A Monthly Magazine of Irish Zoology, Botany, and Edited by GEO. H. CARPENTER, B.Sc., and R. LLOYD Annual Subscription, 5s. Post Free to any Address. London: SIMPKIN, MARSHALL, HAMILTON, KENT & CO. Ltd. NATURE. The number for last week (October 4) contained :Reviews: The Evolution of the Globe, by A. H.-The Genesis of the Inventor, by W. H. S.-Biological Philosophy. — Biology of the Frog, by F. W. G. Our Book Shelf: Morphologie und Biologie der Algen, by GEORGE MURRAY, Letters to the Editor :- Measurement of Resemblance (Illustrated), by Dr. FRANCIS The Quatercentenary Celebrations of the University of Aberdeen. (Illustrated.) Two Books on Angling. (Illustrated.) By J. J. Notes. Our Astronomical Column. Botany at the British Association. The Archæological Congress at Vannes. A New Specimen of the Okapi. University and Educational Intelligence. Societies and Academies. Copies can be obtained through any bookseller, or post-free from the Publishers, St. Martin's Street, London, W.C., on WILLIAMS & NORGATE, 14 Henrietta St., Covent Garden, receipt of 6d. from residents in the British Isles, or of 74. CAMBRIDGE UNIVERSITY PRESS. THE THEORY OF SETS OF POINTS. This book is an attempt at a simple presentation of one of the most recent branches of mathematical science. A few of the most modern books on the Theory of Functions devote some pages to the establishment of certain results belonging to the subject and required for their special purpose, but the present work is the first attempt at a systematic exposition of the subject as a whole. Cambridge Tracts in Mathematics and Datbematical Physics. No. 3. QUADRATIC FORMS AND THEIR CLASSIFICATION BY MEANS OF INVARIANT 35. 6d. The chief purpose of this series is to assist in the maintenance of a high standard in English mathematical teaching by the continued infusion of new methods and more accurate modes of treatment, and by the extension of knowledge of recent mathematical research. Mr. J. G. Leathem, M.A., and Mr. E. T Whittaker, M.A, F.R.S., have been appointed to act as General Editors. A Prospectus of the Series will be sent on application. The Cambridge Physical Series. NOW READY. SECOND EDITION. CONDUCTION OF ELECTRICITY THROUGH GASES. By J. J. THOMSON, D.Sc., LL.D., Ph.D., F.R S., Cavendish Professor of Experimental Physics. Demy 8vo. 165. Extract from Preface to Second Edition."I have made many additions to this edition, and a considerable part of it has been re-written in the hope of introducing new material in a more logical and connected form than could be done by merely adding new paragraphs to the old edition. This has increased the size of the book; on the other hand the publication, since the first edition of this book, of Rutherford's Radioactivity has enabled me to omit some matter fully treated by Rutherford." RADIO-ACTIVITY. By E. Rutherford, D.Sc., F.R.S., F.R.S.C., Macdonald Professor of Physics, McGill University, Montreal. Second Edition, Revised and Enlarged. Demy 8vo. 12s. 6d. net. Extract from Preface to the Second Edition.-"The rearrangement is so extensive as to constitute almost a new work." Nature." Professor Rutherford's book has no rival as an authoritative exposition of what is known of the properties of radio-active bodies. A very large share of that knowledge is due to the author himself. His amazing activity in this field has excited universal admiration." THE THEORY OF EXPERIMENTAL ELECTRICITY. By W. C. D. WHETHAM, M.A., F. R.S., Fellow of Trinity College. Demy 8vo. 8s. net. Guardian.-"We strongly recommend this book to those University students who require an introduction to modern scientific electricity. The research atmosphere of Cambridge is here brought before us, and the student is guided into the paths along which great progress has been made in recent years." NEW EDITION, READY IMMEDIATELY. CONCISE AND EXPLANATORY. By H. J. H. Extract from Preface.-"In the present edition the general aim, scope, and arrangement of the book remain unchanged; but, in view of recent advances and developments in the science, it has been found necessary to make a complete revision of the whole work, and to re-write a considerable portion of it." THE STEAM-ENGINE, AND OTHER Electrical Review-"Probably no other book on the steam-engine has had compressed between its two covers so much sound information in so readable a form. It should be in every student's hands." THE STRENGTH OF MATERIALS. By The Cambridge Biological Series. General Editor, A. E. SHIPLEY, M.A., F.R.S., Fellow A TEXT-BOOK OF ZOOGEOGRAPHY. THE ELEMENTS OF BOTANY. By PRACTICAL PHYSIOLOGY of PLANTS. By FRANCIS DARWIN, M.A., F.R.S., and E. HAMILTON ACTON, M.A. Crown 8vo. With 45 Illustrations. Second Edition. 4s. 6d. MORPHOLOGY and ANTHROPOLOGY. THE ORIGIN AND INFLUENCE of An Elementary Text-Book. TREES : a Handbook of Forest Botany A A MANUAL AND DICTIONARY OF LONDON: CAMBRIDGE UNIVERSITY PRESS WAREHOUSE, Fetter Lane; C. F. CLAY, MANAGER. COUNTY OF LONDON. The London County Council invites applications for the post of ASSISTANT MISTRESS, specially qualified in experimental science and mathematics, in the Thomas Street Higher Grade Girls' School, Limehouse, E. The salary will be in accordance with the London County Council scale, particulars of which are set out upon the form of application. Applications should be made on Form 40 H.G., to be obtained from the CLERK OF THE COUNCIL, Education Offices, Victoria Embankment, W.C., to whom they must be returned not later than 10 a.m. on October 22, 1906, accompanied by copies of three testimonials of recent date. Candidates applying through the post for the form of application should enclose a stamped and addressed envelope. Candidates, other than successful candidates, invited to attend the Committee, will be allowed third-class return railway fare, but no other expenses. Canvassing, either directly or indirectly, will be considered a disqualification. PHOTOMICROGRAPHY. For Sale:-Cooke Anastigmat Lens, 1 inch focus, £1; ditto, 2'37 inch focus, £1; Ross-Goerz Anastigmat, 1 inches focus, iris diaphragm, £3 10s.; Beck Unofocal Anastigmat Lens, 5 inches focus, f45, unrivalled for projection or enlarging, £4; Watson's Traveller's Microscope Projection Eye-piece, one-twelfth dry objective by Himmler, Berlin, £3 10s.; Quarter plate Hand or Stand Camera, by Underwood, all movements, turn-table, Beck unofocal anastigmat lens, 45, ThorntonPickard time and instantaneous shutter, three double dark-slides, £6 6s. ; ditto, by Lancaster, Cooke lens, 65, Thornton Pickard shutter, three double dark-slides, £5 5s.; ditto, "Frena" by Beck, for films or plates, Beck Steinheil orthostigmat lens, 6 8. 5. 84, and 10 inches focus, £6 6s.; Half-quarter plate Camera by Shew, Ross Goerz 1 ns, 68, ThorntonPickard shutter, six double dark-slides, £6 17s. 6d. Apply J. EDWARDS, Colesborne, Cheltenham. Scientific Assistant. In an old-established business with a large connection, an Assistant to travel occasionally. Must have a practical acquaintance with the sale and despatch of orders of Physical and Chemical Apparatus, be well educated and have a good address.-Apply, stating full particulars of experience, age, present salary and references, with photo (to be returned), to "X. Y.," c/o Messrs. HORNER & SONS, Mitre Square, Aldgate, London, E.C. SECOND-HAND BOOKS at Half Prices!! New Books at 25 per cent. Discount! Books in all branches of SCIENCE, TECHNICS, and NATURAL HISTORY, and for all Examinations (Elementary and Advanced) supplied. Sent on approval. Lists free. State wants. Books bought; good prices given. -W. & G. FOYLE, 135 Charing Cross Road, London, W.C. Well-equipped Varnish and Paint Manu facturing Company desires correspondence with a firm of merchants selling their products, with a view to possible amalgamation of interests. -Box 1928, c/o NATURE. DIFFRACTION GRATINGS. SPECTROSCOPES. Mr. Ives' Simplex, Duplex, and Innovation Diffraction Spectroscopes, equalling in resolution and definition instruments costing several times as much. COLOUR PHOTOGRAPHY. Mr. Ives' Krōmsköp Process and Professor Wood's Dif. fraction Process, giving hitherto undreamed-of perfection in the rendering of colours. Send for Circulars 325 and 348, describing these and other interesting optical novelties. Sent post free on request THE SCIENTIFIC SHOP. ALBERT B. PORTER, APPARATUS BY STANDARD MAKERS, IN PERFECT WORKING ORDER, AT As supplied to the National Physical Laboratory; Aberdeen, Aberystwyth, BROWN & SON, Clifton, Heriot Watt and Yorkshire Colleges; and twenty other Scientific Engineers, Coppersmiths, and Joiners, MURIEL STREET, & CHARLOTTE STREET, LONDON, N. Institutions, Polytechnics, &c. NATURE says: "Teachers requiring efficient apparatus at a la cost for lecture or laboratory purposes, might consult the list with advantage." L LEWIS, PUBLISHER & BOOKSELLER. 136 Gower St., London, w.c. TELEGRAMS: TELEPHONE: PUBLICAVIT, LONDON." 10721 CENTRAL. COMPLETEST STOCK of TEXT-BOOKS and RECENT SCIENTIFIC LITERATURE. Special attention to Orders by Post. SCIENTIFIC & MEDICAL CIRCULATING LIBRARY. ANNUAL SUBSCRIPTION from ONE GUINEA. Detailed Prospectus, with List of over 500 Recent Books, on application, ALUMINIUM RECTIFIERS. FREDK. JACKSON & Co. THE ELECTRICAL COMPANY, Ltd., DENT'S ASTRONOMICAL CLOCKS, SIDEREAL OR MEAN TIME CLOCKS FOR OBSERVATORIES, £21 & UPWARDS. Nature says: "MESSRS. E. DENT & Co. have lately E. DENT & CO., Ltd., tory, Greenwich, and the Principal Observatories throughout the World. Only Addresses 61 STRAND, TRADE MARK DENT And 4 ROYAL EXCHANGE, LONDON. SECOND-HAND TELESCOPES. Rods, Tapes, Wire, &c. Invar Compensation Pendulums in three grades. The calculations are T. M. F. TAMBLYN-WATTS, Scientific Apparatus Maker. LISTS POST FREE. YORKS. 5 in Dallmeyer, Equatorial Mount by Cooke, £65. in. Cooke, THORIONITE. SECOND-HAND Equatorial, Garden Stand and Iron Column, £50. 3 in. Student, with STANDARD BAROMETER by Pastorelli & Rapkin. Perfect Ordinary, 4/- per oz. Typical Cubes, all picked, and in. diameter, NEW and EXTENDED EDITION of TABLE of RARE ARMBRECHT, NELSON & CO., Scientific Chemists, 71 & 73 Duke Street, Grosvenor Square, London, W. HARVEY & PEAK (BY APPOINTMENT TO THE ROYAL INSTITUTION OF GREAT BRITAIN.) WAVE MOTION. Makers of the new Apparatus illustrating Wave Motion, designed and used by Dr. J. A. FLEMING in the Christmas Lectures at the Royal Institution. READING MICROSCOPES, RESISTANCE COILS, &c. 56 CHARING CROSS ROAD, LONDON, W.c. |