SOUTH-WESTERN POLYTECHNIC, MANRESA ROAD, CHELSEA, S.W. EVENING CLASSES commence SEPTEMBER 25. The Day College Courses consist of 30 hours per week, and are in preparation for London University degrees of B.Sc. in Mechanical and Electrical Engineering, in Chemistry, Physics and Natural Science. The composition fee for the Session of 3 terms is £15. The Evening Classes consist of similar courses at much reduced rates. The Technical Day Courses are arranged to extend over 3 years and prepare for Engineering, Electrical, Chemical and Metallurgical professions. BEDFORD COLLEGE FOR WOMEN. (UNIVERSITY OF LONDON.) YORK PLACE, BAKER STREET, W. The SESSION 1905-6 will open on THURSDAY, OCTOBER 5. Lectures are given in all branches of General and Higher Education. Taken systematically, they form a connected and progressive Course; but a single Course in any subject may be attended. Courses are held in preparation for all Examinations of the University of London in Arts and Science, for the Teachers' Diploma (London) and for the Teachers' Certificate (Cambridge), and also a special Course of Scientific Instruction in Hygiene. Six Laboratories are open to Students for Practical Work. Two Entrance Scholarships will be offered for competition in June, 1906. The Early English Text Society's Prize will be awarded in June, 1906. Students can reside in the College. DEPARTMENT FOR PROFESSIONAL TRAINING IN HEAD OF THE DEPARTMENT-MISS M. MORTON, M.A. Students are admitted to the Training Course in October and in January. The Course includes full preparation for the examinations for the Teaching Diplomas granted by the Universities of London and Cambridge held annually in December. A Course of Lectures for Teachers on School Hygiene is held on Saturday mornings. Full particulars on application to the PRINCIPAL. CHEMISTRY, ENGINEERING. Separate Laboratories for Elementary, Advanced and Honours students exceptionally large and well equipped. RESEARCH. Special arrangements for students undertaking research during vacation, Full particulars at the Institute or sent on receipt of postcard. REG. S. CLAY, D.Sc., Principal. BACTERIOLOGY AND PATHOLOGY. KING'S COLLEGE, LONDON. (UNIVERSITY OF LONDON.) DEPARTMENT OF GENERAL PATHOLOGY AND Professor R. T. HEWLETT, M.D., M.R.C.P., D.P.H. A Post-Graduate Class in Bacteriology for Medical Practitioners, Veterinary Surgeons, Analysts and others, and for the Diploma in Public Health, will commence on October 2, but students may enter at any later time. Instruction is also given in the Bacteriology of Fermentation, in Chemical Bacteriology, and in Clinical Pathology. A Course of Lectures on Pathology for candidates for the M.H. and other examinations will be given by Professor Hewlett on Tuesdays and Thursdays at 9 a.m., commencing October 5. Fee, La as. For full particulars of these and other classes and of the facilities for private study and original research, apply to the Professor. Prospectus may be obtained from the SECRETARY. MERCHANT VENTURERS' TECHNICAL COLLEGE, BRISTOL. PRINCIPAL-Prof. J. WERTHEIMER, B.Sc., B.A., F.1.C., F.C.S. ENGINEERING-Prof. J. MUNRO, A.R.C.S., M.I. Mech. E.; Prof D. ROBERTSON, B.Sc., A.I.E.E. CHEMISTRY-Prof. J. Wertheimer, B.Sc., B.A., F.I.C., F.C.S. Lecturer: G. P. DARNELL-SMITH, B.Sc., F.I.C., F.C.S. MATHEMATICS-E. S. BOULTON, M.A.; J. W. PULSFORD, B A. In addition to the above the College Staff includes seventy-nine Assistant Lecturers, Demonstrators, and Skilled Artisans. There are eleven Labora tories, eight Workshops, Experimental Engines and Electric Light an Power Station. COURSES for CIVIL, MECHANICAL, MINING and ELECTRI CAL ENGINEERS, CHEMISTS, ARCHITECTS, and BUILDERS UNIVERSITY of LONDON-COURSES for MATRICULATION and INT. and FINAL B.Sc. (including the Engineering Degree) FEE: TEN GUINEAS A YEAR. Calendar (6ď.) or short Prospectus (free) on application to the REGISTRAR. TUITION BY CORRESPONDENCE by an especial unique method for all Examinations in BIOLOGY, BOTANY, CHEMISTRY, GEOLOGY, HUMAN PHYSIOLOGI, HYGIENE, MATERIA MEDICA, PSYCHOLOGY and ZOOLOGY Writing reduced to a minimum. Work directed. Test Papers correcte! and returned. Address Mr. FREDERICK DAVIS, IMPERIAL COLLEGE, 49 and 51 IMPERIAL BUILDINGS, LUDGATE CIRCUS, E.C. MATRIC., INTER., FINAL B.A. & B.Sc. AND OTHER ELEMENTARY AND ADVANCED EXAMS. Preparation by Correspondence and in Small Ora! Classes. Able staff of high qualifications. Single subjects may be taken-Mathematics, Physics, Chemistry, Biology, Botany, &c. French and German for all exams. Moderate Terms-Individual Assistance-Full Notes. Address-Mr. H. J. SMITH, B.Sc. (Lond.), Rosebery House, Breams Buildings, Chancery Lane, London, E.C. For other Scholastic Advertisements, see pages ccxxiii and ecxMIT, COUNTY BOROUGH of SUNDERLAND THE TECHNICAL COLLEGE, SUNDERLAND. Owing to the appointment of the present holders to Lectureships at the Manchester School of Technology, the Governors invite applications for the posts of SENIOR and JUNIOR ASSISTANT. The standard is that of a University College, and applicants for either post should be able to give instruction of that character. A special knowledge of laboratory work is desirable for the senior post, and of drawing office practice for the unior. Applications to be sent in not later than October 16. Education Department, 15 John Street, Sunderland, October 3, 1905. T. W. BRYERS, Secretary. BROWNING'S MICRO-CAMERAS. ("MICROKAM "-REGD.) A simple yet perfect Instru ment for Photographing Objects under the Microscope. No. 1.-Mahogany No. 2.-Do., with Focussing 5s. 16s. 6d. Screen and Double Dark Do. do. (34 square) 31s. 6d. Scope 9d. 3s. 6d. MICROSCOPE TUBE Science Gossip says:-"From a personal experience we can vouch for the fact that it is capable of doing fairly critical work, and it is therefore specially suitable for students in the photographing of botanical, entomological and histological speciniens." Knowledge (Microscopical Editor) says:-"I have seen this class of camera used by ardent photographers who have wished to secure a photograph of a unique or interesting specimen." JOHN BROWNING, Manufacturing Optician, 78 STRAND, LONDON, W.C. RADIUM OF 1,800,000 ACTIVITY. We have just received a limited consignment of the above, and are open to supply same in 5 mg. tubes at a REASONABLE PRICE. W. MARTINDALE, Manufacturing Chemist, 10 NEW CAVENDISH STREET, LONDON, W. Telephone: 1797 Paddington. Telegrams: Martindale, Chemist, London. COMMITTEE. (HIGHER EDUCATION.) MUNICIPAL TECHNICAL INSTITUTE. The Committee invite applications for the position of ASSISTANT LECTURER for CIVIL ENGINEERING. Salary, £125 per annum, rising by £5 increments to £150. Application Forms and particulars to be obtained from the PRINCIPAL at the Technical Institute, to whom Forms should be returned not later than Tuesday, October 10. UNIVERSITY COLLEGE OF SOUTH WALES AND MONMOUTHSHIRE, CARDIFF. (A CONSTITUENT COLLEGE OF THE UNIVERSITY OF WALES.) The Council invites applications for the post of LECTURER in PURE MATHEMATICS at a salary of £180. The appointment will be for one year. Applications, with testimonials or references, should be sent on or before Saturday, October 14, 1905, to the undersigned, from whom further particulars may be obtained. J. AUSTIN JENKINS, B.A., Registrar. University College, Cardiff, September 27, 1905. UNIVERSITY COLLEGE OF NORTH WALES, BANGOR. (A CONSTITUENT COLLEGE OF THE UNIVERSITY OF WALES.) Applications are invited for the Post of JUNIOR DEMONSTRATOR in CHEMISTRY now vacant. Applications and Testimonials should be received not later than Saturday, October 14, by the undersigned, from whom further particulars may be obtained. September 21, 1905. JOHN EDWARD LLOYD, M.A., To SCIENCE and MATHL. MASTERS.Immediate Vacancies (1) Mathematical Master for School in W. London. University man preferred. £150, non-resident. (2) Graduate in Science Honours for Public College. Chemistry and Physics. £200, non-resident. (3) Mathematical Master for County School. Graduate. £140, non-resident.-For particulars of the above and many other vacancies, address GRIFFITHS, SMITH, POWELL AND SMITH, Tutorial Agents (Estd. 1833), 34 Bedford Street, Strand, London. DARLINGTON EDUCATION AUTHORITY. WANTED immediately, an ASSISTANT in the TECHNICAL COLLEGE to take charge of the Chemical Department and to teach some other Elementary Science in the Day Classes. Salary, 150 per annum. Applications, stating full particulars, to be sent as soon as possible to Education Office, Darlington. THE SECRETARY. For other Scholastic Advertisements, see pages ccxxii and ccxxiii. Sales by Auction. SALE OF NATURAL HISTORY SPECIMENS. MR. J. C. STEVENS will Offer at his On view day prior two to five, and morning of sale application. Catalogues on THE CONTENTS OF THE OBSERVATORY AT MR. J. C. STEVENS has received instruc tions from the Executors of the late Dr. Isaac Roberts to Sell by Auction, on the premises as above, the contents of the Observatory, comprising a 20-inch Photo Reflecting Telescope with two mirrors; Two Astro. Stellar Cameras; a 7-inch Object Glass, Cooke Refractor; the Equatorial Stand, with Driving Clock, by Grubb; Transit Instru ment; Sidereal Clock, by Palmer; Micrometers; Two-day Ship Chronometer, by Farquhar; Spectroscopes; Lathe and Tools, and other important effects. May be viewed week prior from ten to four, and morning of sale. Catalogues and all particulars on application to Mr. J. C. Stevens, WARNING. Observe that the Regulator of Burner, Body of Furnace, and Hood are all dis tinctly stamped in the metal "BREWSTER, SMITH & Co., LONDON." Beware of imitations that do not contain the essential feature of this burner's success. Ltd., 20-26 Sardinia Street, Lincoln's Inn Fields, W.C. Co., TOWNSON & MERCER, 34 Camomile Street, E.C. MARBLE REDUCED TO QUICKLIME IN 10 MINUTES with our NEW BLAST BUNSEN BURNER AND MIDGET FURNACE. We make these in two sizes at present," and ", and the prices are-Burners only, 1/6 and 2/6; complete with Furnace, 4/6 and 6/ The consumption of gas is the same as with an ordinary Bunsen, but the heat derived is three times as great, and a number of interesting experiments can be performed with them, which have only been possible before with very expensive furnaces. We are the SOLE MAKERS. NATURE says:-"The combination of furnace and burner is very convenient. These little furnaces are not only useful for reducing calcium carbonate to lime, but also work very well in fusion experiments." BREWSTER, SMITH & CO.. 6 CROSS ST., FINSBURY PAVEMENT, LONDON. Makers and Importers of every description of Scientific Apparatus and Chemicals. LABORATORIES FITTED & FURNISHED THROUGHOUT. Our NEW CHEMICAL APPARATUS LIST post free, 1/ LOSCOPE PATENT SCREEN PITCH BLENDE (PATENT). Shows a magnificent display of scintillations, showers of sparks, direct from the mineral Pitch. blende, Radium, Polonium, Uranium, Thorium, or any radio-active substance, even a Welsbach mantle contains sufficient Thorium to excite the very sensi. tive screen of the Scintilloscope, which is far more sensitive than the Spinthariscope. The Scintil loscope rivals the most delicate Electroscope as a detector of Alpha rays. The eye sees an inexhaustible shower of stars of white light, giving a very realistic idea of the ceaseless activity of these marvellous substances which are producing the terrific bombardment causing this beautiful display. See NATURE, September 29, page 535. Glew's Scintilloscope Superior Lens, with Extra-sensitive Pitchblende and Polonium Screens, giving brilliant effects, Complete, 75. 6d., Post free, U.K. Foreign Postage extra, weight 2 ounces. Pieces of Pitchblende mineral, ground flat and polished, with Sensitive Screen attached, for use in Scintilloscope or with any strong pocket magnifier, from 7s. 6d. each, according to size. Radio-active supplies of every description, on Sale or Hire. Radium Bromide 1,800,000 units on hire for lectures. F. HARRISON GLEW, Radiographer (Silver Medallist, Paris, 1900), 156 Clapham Road, London, S. W. HEELE LOND THE SANGER-SHEPHERD X-RAY PLATE is undoubtedly the best plate at present Its advantages are: (1) Great sensitiveness to X-Rays, thereby lessening exposure. (2) As the result of shortened exposure enormously increased detail of structure shown in the developed plate. (3) The emulsion is in a single thin film, which does not frill and reduces by half the time usually taken to develop and fix. Already in use at the principal London Hospitals. Prices of standard sizes, Pamphlet, including Developers, &c., free on application to the AGENTS FOR THE SALE OF THIS PLATEHARRY W. Cox, Ltd., ACTUAL MAKERS of X-Ray, &c., Apparatus to the Admiralty, War Office, Colonial Office, Indian Government, &c., 1a ROSEBERY AVENUE, & 15-21 LAYSTALL ST., LONDON, E.C. VOGEL'S SPECTROGRAPH. Two prisms of dense flint-glass enclosed in a strong brass case, to which the collimator and the camera are attached; collimator of in. aperture and 18in. focal length, with adjustable slit with micrometerscrew and dividing drum; the camera is furnished with an achromatic double objective of 2in. aperture and 29in. focal length; size of plate, 7in. by 5in. Can be seen at my Showrooms DELIVERY FROM STOCK. PETER HEELE. 115 HIGH HOLBORN, LONDON, W.C. Maker of Physical, Chemical, and other Instruments, and every kind of Spectroscope and Polarimeters. GRAND PRIX, PARIS, 1900; ST. LOUIS, 1904. Telegrams: "ARCTITUDE, LONDON." BROCA GALVANOMETER. A suspended-needle instrument which is almost perfectly astatic. of far higher sensibility than galvanometers of the suspended coil type. Almost uninfluenced by stray magnetic fields. Sensibility adjustable through a wide range by raising or lowering the tiny controlling magnet. The coils exchanged in a few moments for others of different resistance. Price of Broca Galvanometer, complete, as illustrated, with one pair of Coils (Resistance about 50 ohms, unless otherwise ordered), £7 10 0 Extra pairs of Coils (Resistance about 4 ohms or 1600 ohms), per pair 15s. THE CAMBRIDGE SCIENTIFIC INSTRUMENT COMPANY, LTD., CAMBRIDGE, ENGLAND. |