October 12, 1905] 



NA TURE 



CCXXXIU 



COUNTY BOROUGH of SUNDERLAND 

 EDUCATION AUTHORITY. 



THE TECHNICAL COLLEGE, SUNDERLAND. 



ASSISTANT LECTURESHIPS IN ENGINEERING. 

 Salaries, ^£175 and ^150. 

 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. Tlie 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 



Applications to be sent in not later than October 16. 

 For further particulars apply to 



T. W. BRYERS, Secretary. 

 Education Department, 



15 John Street, Sunderland, 

 October 3, 1905. 



COUNTY BOROUGH OF SALFORD 

 EDUCATION COMMITTEE. 



ROYAL TECHNICAL INSTITUTE. 



Princu'al H. B. KNOWLES, M.A. 



Applications are invited for the position of CHIEF LECTURER in 

 the ELECTRICAL ENGINEERING DEPARTMENT, vacant by 

 reason of the appointment of Mr. Burnie to the Principalship of the 

 Croydon Polytechnic. 



The commencing salary will be ^^250 per annum. 



Applicants bhould possess Hoth workshop and teaching experience, and 

 also adequate laboratory training. 



Applications mast be received on or before Thursday, October 19, 1905. 

 Further particulars and forms of application may be obtained from the 

 undersigned. 



OGILVIE DUTHIE, Director of Education. 

 Education Office, Chapel Street, Saiford, 

 October 5, igot;. 



ARMSTRONG COLLEGE, 

 NEWCASTLE-UPON-TYNE. 



(In the Universitv of Durham.) 



The Council will shortly appoint a LECTURER in APPLIED 



MATHEMATICS 



Salary to commence at ^£200 pe 



The Lecturer will be required 

 the Mathematical Department. 



Candidates should send three copies of th^ 

 to the undersigned, on or before November i 



Armstrong College, Newc 



stie 



,-Tyn 



n the general te.iching work of 



application and testimonials 



905. 



F. H. Pruen, Secretary. 



BRISTOL EDUCATION COMMITTEE. 



FAIRKIKLD SECONDARY SCHOOL. 



WANTED, experienced FIRST LADY ASSISTANT, who must be 

 graduate or hold equivalent Diploma, qualified in Mathematics, Hygiene, 

 and ordinary Form subjects. Among other duties she will be required to 

 supervise under the Principal all the girls, to organise school games, &c. 

 Salary, ^120, rising by annual increments of ^5 to £,1^0 per annum. 

 Application forms, which may be obtained of the Secretary, must be 

 received not later than October 25. 



Education Offices, Guildhall. Bristol. 



ROYAL AGRICULTURAL COLLEGE, 

 CIRENCESTER. 



CHAIR OF MATHEMATICS AND PHYSICS. 



IN-COLLEGE RESIDENT PROFESSORSHIP. 



pplications for the above, vacant at 

 Fixed Stipend of j^iso pe 



The Governing Body invite 

 Christmas next. Emoluments : 

 Capitation Fees of about £35 pei ai 

 during Session. Applications, with ; 

 testimonials, &c., in lie addressed to 



the Pr 



SCIENCE MISTRESS wanted immediately 



for Girls' School near London Botany, Chemistry, Physics, B.Sc. or 

 equivalent essential. £\oo to jCi20. non-resident. Experience neces- 

 sary. Address Griffiths, Smith, Powell & Smith, Educational 

 Agents, 34 Bedford Street. Strand, London. 



TO SCIENCE AND MATHEMATICAL 



MASTERS.— Janu 

 qualified Masters ^ 

 term should apply : 



ry (1906) Vacancies. 

 eking posts in Publ 

 once, giving full det 

 tts, Smith. Po 



-Graduates and other wel 

 ; and other Schools for nexl 

 ils as to qualifications, &c.^ 

 & Smith, Tutorial Agent; 

 Strand, London. Immediate notice 

 e and Mathl. Masters will be sent. 



WANTED, a gentleman who has good 



knowledge of the Microscope and Microscopical Apparatus combined, 

 with Commercial ability to represent Manufacturers of these goods 

 having a world-wide reputation. His services would be required to 

 introduce the above to Hospitals, and to demonstrate before Societies. 

 —Address Box 1876, c/o Nature. 



' Tabloid'' Brand I 



Intensifier. 



The best cure for weak, thin 

 or flat negatives. Intensifies 

 the shadow details as well as 

 the denser deposits in one 

 operation. No risk of stain. 

 Economical, portable and keeps. 



Sold in tubes by all chemists. 

 LEAFLETS GRATIS. 



Burroughs Wellcome & Co. 



London, Sydney and Cape Town. 



Chief Offices— Sno-n Hill Buildings, London. 



Binocular Microscope, full size, by Smith and Beck 



Universal action, mechanical stage, revolving selinite stage, 7 eye-pieces, 

 6 finest objectives, 2, lA, i, \, \, n'^ in., magnifies 25 to 8000 times 

 achromatic, buU's-eye, and parabolic condensers, revolving nose-piece, 

 diaphragms, silver side reflector frog stage, nicol prism, camera lucida 

 tourmaline lens, polariscope, draw tube, forceps, slides, live boxes, &c. 

 Cost ;^So; bargain, 28 Gns. Approval; Deposit. — Tabor, 6 Monu 

 ment Street, E.C. 



FOR SALE.— 18-inch Spark Induction Coil, 



Newton-Apps, in perfect condition ; also several lo-inch Spark Coils, 

 Newton-Apps, and others, jet breaks and accessories.— -G. Bowron, 

 57 Edgware Road, London, W. 



FOR SAL^.— Chemical Society Journal, 



alsi Berichte, 1894 to date ; both well bound and com- 

 " McK.," Birkbeck College, E.C. 



1876 I 



Sale b^ Huctton. 



THE CONTENTS OF THE OBSERVATORY AT 

 "STARFIELD," CROWBOROUGH. 

 TUESDAY, OCTOBER 17, at 12.30. 



MR. J. C. STEVENS has received instruc- 

 tions from the E.\ecutors 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 Farqubar ; Spectroscopes ; Lathe and Tools, and 

 other important effects. 

 May be viewed week prior from ten to four, and mornin,g of sale. 

 Catalogues and all p.trticulars on application to Mr. J. C. Stevens, 



:,S King Street. Covent Garden, London. W.C. 



TABLE OF RARE ELEMENTS. 



By E. L. N. ARMBRECHT. 



Symbols, Atomic Weight, Di^co\'erer, Isolater, Specific Gravity, Prim 

 Source, Melting Point, Properties, Salts of, Price, &c. 



ARMBRECHT, NELSON & CO., 

 71 & 73 Duke Street, Grosvcnor Square, W. 



N.B.— Sent Free on application. 



