NA TURE 



[May 9, 1 90 1 



THE NATIONAL PHYSICAL 

 LABORATORY. 



The Committee propose shortly to consider the appointment 

 of the following members of the Staff, and are prepared to 

 receive applications. 



The Buildings of the Lalioratory will be in the grounds of 

 Bushy House, Teddington. 



(1) SUPERINTENDENT of the ENGINEERING DE- 



PARTMENT. Stipend, ;^400 per Annum. Candidates 

 should have a knowledge of the theory of mechanical 

 and electrical engineering together with experience in 

 workshops. 



(2) ONE OR TWO ASSISTANTS in the PHYSICS 



DEPARTMENT. Stipend, /200 to /250 per Annum. 



(3) ONE ASSISTANT in the PHYSICS DEPARTMENT 



to take charge of such chemical investigations as may be 

 required. These will consist chiefly in the testing and 

 preparation of materials for use in the various Physical 

 Researches. A knowledge of Metallurgy is desirable. 

 Stipend, £200. 



The above will rank as Members of the Staff of the Laboratory 

 ind will be responsible to the Director for the proper perform- 

 ance of such duties as he may assign to them. The appointments 

 will in most cases date from September 29, 1901, and will be 

 subject to six months' notice on either side. Further particulars 

 as to the duties may be obtained from the Director. 



Applications for the above posts, accompanied by a limited 

 number of testimonials, should be made not later than May 24, 

 1901, to the Director, National Physical Laboratory, Old 

 Deer Park, Richmond, .Surrey. 



The Committee are also prepared to receive Applications for 

 a small number of JUNIOR ASSISTANTSHIPS at Salaries 

 of from /'lOO to ^^150 per Annum. 



APPLICATIONS are invited for the Office 



of PUBLIC .\NALYST for the County of Cirdigan. Remuner.ilion. 

 a retaining salary of ;^5 per Annum, with a fee of loj. bd, for every 

 Analysis made ; these have averaged forty-eight a year during the past 

 three years. 

 -Applications, with documentary evidence of competency, must reach the 

 undersigned not later than the 15th instant. 



H. C. FKYER, Clerk of the Council. 

 County Council Office, Aberystwyth, May 4, 1901. 



An EXAMINATION of CANDIDATES for 



entry .as Assistant Engineers for Temporary Service in His .Majesty's 

 Navy will be held by Admiralty Officers on June ly, =0 and 21', ijoi. 

 .■\ge 20 to 23. Must have served for not less than four years at an 

 approved Engine Works, and have been si.v months on Design Work in 

 Drawing Office. Applications to compete to be made to the Secretary 

 of the Admir.-ilty, Whitehall, London, ,S.W. 



TO LABORATORY ASSISTANTS.— 



Wanted an ASSISTANT to help in the Chemical .md Physical 

 Laboratories, Eton College. Must have had e.vperience. Wages 

 ;^2 a week. £,\Oi, per annum.— Apply, with three testimonials, to 

 Hugh de Havilland, Eton College, Windsor. 



BOROUGH POLYTECHNIC 

 INSTITUTE, S.E. 



CHEMISTRY DEPARTMENT. 



A Course of Lectures on ELECTRO-CHEMISTRY will be given at 

 7.30 p.m. by F. MoLLWO Perkin, Ph.D., commencing May 21 ; and an 

 Introductory Course on the Chemistry of the CARBON COMPOUNDS, 

 by E. C. Jee, D.Sc, on Thursday Evenings, starting Thursday, May 23. 



The Laboratories will be open on the Evenings of the Lectures from 

 y.ro p.m. for Practical Work which will be adapted to the individual 

 requirements of the Students. 



C. T. MILLIS, 

 Principal, Education Department. 



COACHING for all EXAMINATIONS, 



PRACTICAL and THEORETICAL, in Chemistry, Physics, Physi- 

 ology and Geology; also Mathematics, Pure or Applied. Well-litted 

 Laboratories for Research Work, SCIENTIFIC or COMMERCIAL, 

 in Chemistry, Electricity, General Physics, Bacteriology, Photography, 

 and Rontgen Ray Work. 

 The Director, 



HE.ATHCOTE LABORATORIES, 



Heathcote Street, Gray's Inn Road. 



iROYAL INSTITUTION OF 

 great: BRITAIN. 



ALBEMARLE STREET, PICCADILLY, W. 



W. M. Flinueks Peti;ie, Esq., D.C.L., Litt.D., LL.D., Professor of 

 Egyptology, University College, London, will on Saturday next (Mayri), 

 at three o'clock, begin a Course of Three Lectures on "The Rise of 

 Civilisation in Egypt." (Illustrated by Lantern Slides.) 



Subscription to the Course Half-a-Guinea. 



Tickets may be obtained at the Office of the Institution. 



ZOOLOGICAL SOCIETY OF LONDON. 



A Lecture will bt delivered in the Society s Meeting Room, at s Hanover 

 Squ.-ire, W., on Thursday, May 16, at 4.30 p.m. (after the General 

 Meeting), by Prof. W. A. Herdman, F.R.S., on " Biological Stations at 

 Home and Abroad " (with lantern illustrations). 



Tickets for this Lecture may be obtained at the Society*.>s Office, price 

 IS. 6d. each. Fellows of the Society can obtain free tickets for themselves 

 and two friends on application. Ladies are admitted. 



ADVERTISER earnestly appeals for finan- 



cial assistance to conduct further experiments and patent two new 

 X-Ray Tubes having great curative powers. Principals only. — G, 

 S.MITH, 37 Daniel Street, Cardiff. 



FOR SALE. — Collection. 80,000 Specimens 



of ONTARIO INSECT FAUNA. Gall-producing Insects and their 

 Parasites fully represented. Believed manyjNewjSpecies to be identi- 

 fied.— Apply, Dr. W. I;i;.UiiE. 40.^ Parliament Street, Toronto, Canada. 



J. BACKHOUSE & SON, 



LIMITED, 



(SCIENTIFIC DEPAIiT.MENT) 



Supply all Botanical Material required for Lecture and Demon- 

 stration purposes and for Class-work. Fresh, or preserved in 

 Alcohol. Insectivorous Plants. Plants for Physiological Experi- 

 ments. Museum Specimens. Microscopical Preparations. 

 Prices sh-irtlij moderate. 



WORKING MODELS, 



ENGINES, BOILERS, &C., 



Second Hand, but of first rale make and in 

 thorough going: order. 



PARTICULARS OF 



A. C. CLARKE. 161 Albion Road, London, N. 



GENUINE WORKING RECIPES, 



IN THE 



OIL, GREASE, SOAP. PAINT. COLOUR, 

 VARNISH, and ALLIED TRADES. 



Latest Up-to-date Processes and Methods— English and Continental 



Household and Trade Specialities, in every line. 



(Many Unpatented). 



Consultations— Correspondence by Letter. 



.Analysis— Samples Matched— Identicals Found— Samples and Articlf 

 Received for Testing and Analysis— Certificates Given— Contrat 

 Work Undertaken. 



WRITE FOR FULL LIST, FREE. 



E. SCOTT, 



Practical Cbemist, Analyst, and Expert. 

 168 Church Street, NORTH SHIELDS. 



GLASS BLOWING. 



All descriptions of Mercury Pumps 

 for High Vacua. 



'•X" RAY TUBES AND ALL KINDS OF 

 VACUUM TUBES. 



COSSOR, 



67 FARRINGDON ROAD, E.G. 



