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NATURE 
[APRIL 14, 1923 

ROYAL INSTITUTION OF 
GREAT BRITAIN, 
21 ALBEMARLE STREET, W.r1. 
GENERAL COURSES OF LECTURES AFTER EASTER, 1023. 
At Three o'clock. 
Sir ArTHur Kerru, F.R.S., ‘‘The Machinery of Human Evolution.” 
Tuesdays, April 10, 17, 24, May 1. 
Professor A. C, SEWARD, F.R.S., ‘‘ The Ice and Flowers of Greenland,” 
and “ Arctic Vegetation of Past Ages.” Tuesdays, May 8, 15. 
Professor W. M, FLinpers Perrig, F.R.S., ‘ Discoveries in Egypt.” 
Tuesdays, May 22, 29, June 5s. 
Professor A. O. Rankine, “‘Lhe Transmission of Speech by Light.” 
Thursdays, April 12, 19. 
Professor J. T. MAcGREGOR-Morris, ‘‘Modern Electric Lamps.” 
Thursdays, April 26, May 3, 10. 
Professor E. G. Cokur, F.R.S., ‘‘ Engineering Problems solved by 
Photoelastic Methods.” Thursdays, May 17, 24. 
Sir Witt1am M. Bayuiss, F.R.S., ‘The Nature of Enzyme Action.” 
Thursdays, May 31, June 7. 
Sir Owen Seaman, ‘Sonnets and Ballads of Dante Rossetti.” 
days, April 14, 21. 
Dr. Leonarp L. M. Witttams, “The Physical and Physiological 
Foundations of Character." Saturdays, April 28, May s. 
Mr. Joun B. McEwen, “Dance Music,” ‘‘ Harmonic 
“Musical Education.” Saturdays, May 12, 19, 26. 
Dr. ArtHUR W. Hirt, F.R.S., ‘‘ The Vegetation of the Andes,” ‘‘The 
New Zealand Flora.” Saturdays, June 2, 9. 
Subscription (non-Members) to all Courses of Lectures (excepting the 
Friday Evening Discourses and the Juvenile Lectures), Four Guineas. 
Subscription to a Single Course, ‘'wo Guineas or One Guinea. 
The Friday meetings will begin on April 13 at 9 p.M., when Dr. W. H. 
Ecces will give a Discourse on ‘Studies from a Wireless Laboratory.” 
Succeeding Discourses will probably be given by Mr. W. J. S. Lockyer, 
Mr. C. VY. Boys, Professor F. Soppy, Professor W. A. Bone, Mr. W. M. 
Morpey, Sir Aston Wess, Professor H. A. Lorentz, and Miss Joan 
Evans. 
Information as to Membership and other matters connected with the 
Institution can be had at the Secretarial Office, 21 Albemarle Street, W.t. 
Satur- 
Evolution,” 

IMPERIAL COLLEGE OF SCIENCE 
AND TECHNOLOGY, 
SOUTH KENSINGTON, S.W.7. 
DEPARTMENT OF OPTICAL ENGINEERING AND 
APPLIED OPTICS. 
A Special Course of Six Weekly Lectures on ‘‘ THE POLARISATION OF 
Licut AND Some oF 11s TECHNICAL AppLicaTions,” by Professor F. J. 
CHESHIRE, C.B.E., F-.Inst.P., P.R.M.S., commencing on Monday, 
April 30, at 6.30 P.M. 
The Petrological Microscope will receive special attention in these 
Lectures. 
For admission tickets application should be made to the REGISTRAR at 
the above address, or the fee may be paid at the first lecture. Fee, 10s. 

UNIVERSITY OF ABERDEEN. 
BLACKWELL PRIZE ESSAY. 
THE BLACKWELL PRIZE of THIRTY POUNDS, open to Un- 
restricted Competition, will be awarded in 1924 for the Best Essay, provided 
the ‘Trustees are of opinion it is of a sufficiently high standard, on ‘‘ The 
History of the Fishing Industry of the Port of Aberdeen since 1800.” 
Essays must be lodged with the SECRETARY OF THE UNIVERSITY on or 
before January 1, 1924. 
Each Essay must bear a motto, and be accompanied by a sealed envelope 
bearing the same motto, and enclosing the name and address of the writer. 
H, J. BUTCHART, Secretary. 


BEDFORD COLLEGE FOR WOMEN 
(UNIVERSITY OF LONDON). 
POST-GRADUATE SCHOLARSHIP. 
The Council of Bedford College for Women invite applications for a 
POST-GRADUATE SCHOLARSHIP in SCIENCE to be awarded in 
June 1923. Open to graduates of Bedford College only. Value £125 a 
year for two years. 
For further information apply to the SecreTarRy, Bedford College, 
Regent's Park, N.W.1. 

UNIVERSITY OF LONDON. 
DIXON FUND. 
_ Applications for grants from the DIXON FUND for assisting scientific 
investigations, accompanied by the names and addresses of two references, 
must be made to the Acapemic REGisTRAR, University of London, South 
Kensington, S.W.7 (from whom further particulars may be obtained) before 
May 1I5, 1923. 

CHELSEA POLYTECHNIC, 
CHELSEA, S.W.3. 
Day and Evening Courses in Science under Recognised Teachers 
of London University. 
I. INDUSTRIAL CHEMISTRY DEPARTMENT. ’ 
Technical Courses in Analytical and Manufacturing Chemistry, 
Pharmacy, Food and Drugs, A.I.C. Courses, Metallurgy, Assaying, 
Foundry Work, Research. 
Il. INDUSTRIAL PHYSICS DEPARTMENT. 
Practical work in General Physics, Applications to Industries, 
Acoustics, Electrical 
Metrology, Calorimetry, Illumination, 
Measurement, Research. 
BIOLOGICAL AND GEOLOGICAL DEPARTMENT. 
Courses for B.Sc., etc., in Botany, Geology, Mineralogy, Zoology, 
Special Courses in Bio-chemistry, hoes Bacteriology, 
Physiology, Hygiene, Entomology, Plant Pathology. Course for 
Tropical Planters, Research. 
Easter Term begins on April 17. 
SIDNEY SKINNER, M.A., 
Principal. 
Telephone: Kensington 8a9. 

BATTERSEA POLYTECHNIC. 
LONDON, S.W.11. 
Principal—RosBert H. PicKarp, D.Sc., F.R.S. 
COURSES FOR WOMEN. 
Full-time day courses for women preparing to be teachers of Domestic — 
Subjects. 
Preparation for posts as Institutional Matrons and Housekeepers and for 
colonial and home life. 
Full-time day courses of training for Women Health Visitors and Infant 
Welfare Workers. : 
Evening courses of training for Sanitary Inspectors, Health Visitors, 
Meat and Food Inspectors, Smoke Inspectors, ete. 
Day and Evening courses in Art, Music, and Domestic Science. 
Hostels for Women Students. Large Athletic Ground and numerous 
clubs and societies. 

NATIONAL UNION OF SCIENTIFIC 
WORKERS. 
Tue AIM or THE NATIONAL UNION or SCIENTIFIC © 
WORKERS is to bring together into one professional organisa- 
tion all qualified scientific workers, viz, : 
Those engaged (a2) In Higher Educational and Research 
Institutions. 
(6) In Industry and Consultative Practice. 
(c) In State and Municipal Scientific De- 
partments. 
Applications for membership are invited from all scientific 
workers with university degree or equivalent professional quali-— 
fication. Further particulars may be obtained from 
THE GENERAL SECRETARY, N.U.S.W., ~ 
25 Victoria Street, S.W.1. q 

TO SCIENTISTS AND RESEARCH STUDENTS. — 
THE INTERNATIONAL BIBLIOCRAPHICAL SERVICE BUREAU, 
employed by British Government Departments, University Professors, etc., 
supplies complete Continental and American bibliographies on any scientific, — 
literary, or medical subject. Chemical work a speciality. Extracts made. — 
Headquarters: Vienna. ap ed representative; ‘‘ALEXANDRIAN,” IA 
Longridge Road, Earl's Court, 5. W.5. 

UNIVERSITY OF LEEDS. 
DEPARTMENT OF MATHEMATICS. 
The Council will shortly proceed to the appointment of an ASSISTANT 
LECTURER in the DEPARTMENT OF MATHEMATICS. Duties 
to begin October r. Salary £350 to £400 a year, in accordance with quali- 
fications and experience. It is desirable, but not essential, that the selected 
candidate shall possess a competent knowledge of the higher portions of 
some branch of Applied Mathematics. Applications, stating academic 
career and subjects of special study, together with testimonials (one copy) 
and references, should reach the REGIsTRAR, The University, Leeds, on or 
before April 27, 1923. 
.- ers 
