NA TURE 



[May 25, 1905 



OPTICAL CONVENTION, 1905. 



Prcsidrtit : 



Dr. R. T. GLAZEBROOK, M.A., F.R.S., 



Director of the National Physical Laboratory. 



Vice- Presidents .' 



• Sir Wm. de Wiveleslie Adnev, K.C.B., D.C.L., F.R.S. 

 The Right Hon. The Lord Blythswood. 

 Sir W. H. M. Christie, K.C.B., M.A., F.R.S. , 



Astronomer Royal. 

 The Right Hon. The Earl of Crawford, K.T., LL.D., F.R.S. 

 Mr. Thos. R. Dallmever, F.R.A.S. 

 The Hon. Alban G. H. Gibp.s, M.A., M.P., 



!\Iastero/tlie Worshipful Co. of Spectacle Makers. 



Sir Howard Grubb, F.R.S. 



The Right Hon. The Lord Kelvin, O.M., G.C.V.O., F.R.S. 



The Right Hon. The Lord Rayleigh, O.M., D.C.L., F.R.S. 



The Right Hon. The Earl of Rosse, K.P., D.C.L., F.R.S. 



THE OPTICAL CONVENTION will be held at the North- 

 ampton Institute, Clerkf.nwell, E.G., from May 31 to 



The object of the Convention is to bring into co-operation those 

 interested in Optical Matters, from all sides of the question, theo- 

 retical, practical, and commercial. 



The mornings will be devoted to papers and discussions on Optical 

 subjects. These will be collected in a volume to be issued by the 

 Convention. 



There will be an 



EXHIBITION OF OPTICAL & SCIENTIFIC INSTRUMENTS 



of British manufacture, in the large hall of the Northampton Institute, 

 during the Convention, open daily from 12 to 10 p.m. In connection 

 with this, a catalogue is in preparation, which will be a useful work 

 of reference in regard to instruments manufactured in this country. 



The Subscription for Membership of the Convention will be five 

 .'ihillings. Applications for membership should be addressed to the 

 Hon Sec, Mr. F. J. Selbv, M.A., Elm Lodge, '1 eddington, 

 Middlesex, who will be glad to furnish further particulars if desired. 



ADMISSION to the Exhibition, daily, ONE SHILLING, 



after 7 p.m.. Sixpence. 

 Tickets admitting to the Exhibition at any time while it is upen, 2/6. 



BRITISH ASSOCIATION FOR THE 

 ADVANCEMENT OF SCIENCE. 



BURLINGTON HOUSE, LONDON, W. 



The ANNUAL GENERAL MEETING will be held this year in 

 SOUTH AFRICA, commencing at Cape Town on Tuesday, August 15. 

 Presihent-Elect : 

 Profes.sor G. H. DARWIN, M.A.. LL.D., Ph.D.. F.R.S. 



Owing to the exceptional circumstances of this Meeting, contributions lo 

 the Sectional proceedings have been specially invited. Authors of Papers 

 accepted by the Sectional Committees are reminded that all abstracts 

 (together with the original Papers, if possible) must be sent in to the Office 

 of the Association not later than June 15. Abstracts received after that 

 date will appear in the Annual Report, but cannot be printed before or 

 durinq the Meelin-. 



A, SILVA WHITE, Assistant Secretary. 



UNIVERSITY OF LONDON. 



THE BROWN ANIMAL SANATORY INSTITUTION. 



(Under the Government of the University.) 



Notice is hereby given that, in accordance with the Will of Mr. Brown, a 

 course of Five Lectures will be delivered by the Professor-Superintendent 

 (T. Gregok Brodie. Esq., M.D., B.Sc, F.R.S.) in the Physiological 

 Laboratory of the University of London, South Kensington, S.W., on 

 Tuesdays. May ^o, and June 6, 13, 20 and 27, at Five o'clock each after- 

 noon. Subject : " The Work of the Brown Institution." 



The Lectures are free to the public. 



By Order of the Senate, 



PERCY M. WALLACE, 



May 19, 1Q05. Secretary to the Senate, University of London. 



UNIVERSITY COLLEGE, LONDON. 



(UNIVERSITY OF LONDON.) 



The Council will shortly proceed to fill the vacan:y in the Chair of Civil 

 Engineering and Surveying occasioned by the resignation of Professor 

 Vernon-Harcourt. 



Candidates for the a 

 (accompanied by at lea; 

 may wish to submit) nc 

 from whom fnll pariicul; 



ntment are requested to send their applications 

 venty printed copies of any testimonials they 

 Lter than June ro to the Acting Secretary, 

 nay be obtained. 



BIRKBECK COLLEGE 



BREAMS BUILDINGS. CHANCERY LANE, E.G. 

 FA.CTJLi'r'y OF scie:iii'ce:. 



DAY AND EVENING COURSES.- 

 _. . . /I. E. Mackenzie, Ph.D., D.Sc, 



Chemistry \H. Wren, Ph.D., B A., B.Sc. 



Physics 



Mathematics 

 Botany 



THS, D.Sc. 

 ...{D. Owen, B.A., B.Sc. 

 Ib. W. Clack, B.Sc. 

 f E. H. Smart, M.A. 

 ••■ I W. G. BiRT, B.A., B.Sc. 



f A. B. Rendle, M.A., D.Sc. 

 - I F. E. Fritsch, Ph.D., B.Sc. 



Zoology - H. W. Unthank, B.A., B.Sc. 



Geology & Mineralogy ... Geo. F. Harris, F.G.S. 

 Assaying, Metallurgy & Mining. Geo. Patchin, A.R.S.M. 



RESEARCH in Chemistry and Physics in well-equipped lahoratories. 



French, German, Spanish, Russian, Dutch, & Italian Classes. 

 EVENING CLASSES also in Biology, Physiology, Practical Geometry,' 

 Building and Machine Construction, Steam, Theoretical and Applieti 

 Mechanics, Land and Quantity Surveying, and Estimating. 

 Calendar td. (post free Si/.), on application to the Secretary. 



BIRKBECK COLLEGE, 



BREAMS BUILDINGS, CHANCERY LANE, E.G. 



HISTORY OF CHEMISTRY. 



A Course of Nine Lectures will be given by Dr. J. E. Mackenzie 

 Saturdays, commencing May 27, at 12 noon. 

 Fee for the Course, 5^. 



BEDFORD COLLEGE FOR WOMEN. 



(UNIVERSITY OF LONDON.) 

 YORK PLAGE, BAKER STREET, LONDON, W^. 



A Reid Scholarship in Arts, annu,ll value li\ loj. first year, liZ 71. 

 second and third years, and an Arnott Scholarsllip in .Science, annual value 

 ^£48, bolh tenable for three years, will be awarded on the results of an 

 e.'iamination to be held at the College on June 28 and 29. For further 

 information apply to the Principal. 



DEPARTMENT FOR PROFESSIONAL TRAINING IN 

 TEACHING. 



Students are admitted to the Training Course in October and January. 



Two Scholarships, each of the value of ;£ 10, will be awaided for the 

 course of Secondary Training beginning in October, 1905. 



Applications should reach the Head of the Training Department 

 not later than July 7, 1905. 



EAST LONDON TECHNICAL 

 COLLEGE. 



A Course of Four Lectures on Electrical Measurements will be gi\ 

 the East London Technical College on Wednesdays, May 31, June 

 21, at S.30 p.m. Fee for the Course, 5^. 



WALTER W, SiiTON, M.A., Acting Secretary, 



TUITION BY 

 CORRESPONDENCE. 



For MATRICULATION, B.A., SCHOLARSHIPS, and PRO- 

 FESSIONAL PRELIMINARIES. Tuition in Latin, Greek. French, 

 German, Italian, Mathematics, Mechanics, Physics, Chemis- 

 try, Psychology, Logic, Political Economy, Bool<-keeping. 



The Staff includes Graduates of 0.\ford, Cambridge, London, and Royal 

 Universities.— Address Mr. J. Charleston, B.A., Burlington Correspond- 

 ence College, Clapham Common, London, S.W. 



TO SCIENCE MASTERS, especially those 



taking ELECTRICITY as a special subject. Wanted by July i next 

 for important College, well-qualified Master for Electricity, One who 

 ha,s had some experience in the organisation of the work of a local 

 Technical Instruction Committee. Salary, ^£150 to £100 per annum. 

 Candidates for the above and those seeking posts for the term com- 

 mencing in September next should apply forthwith, giving details as 

 to qualifications and enclosing copies of testimonials, to Griffiths, 

 Smith, Powell & Smith, School Agents (Estd. 1833I, 34 Bedford 

 Street, Strand, London. 



MEERUT COLLEGE. 



(NORTHERN INDIA.) 

 Applications are invited for the FIRST (European) PROFESSORSHIP 

 (PHYSICS). Salarj', .£320 per annum (£50 passage money). Candidates 

 ■' ' " " ■' '" ' -'-- -^- 30 years of age, and 



should be University Graduates, under 30 years of age, and unmar 

 For particulars apply to Professor Worthington, Mohuns, Tavistock 



For ftkef Scholastii Aih'erlise)iienls,see pa^es ■!t.-^\\\ and ■^■>iit.v . 



