XcVviil ; NATURE 

-UNIVERSITY OF ABERDEEN. 
VACATION COURSE, JULY 16-27, 1923. 
SHORT COURSES BY PROFESSORS AND LECTURERS. 
Group I. Literary anp Artistic Stupres, including: Present-day 
Germany; Recent Advances in Education; The Study of Words; 
Celtic Literature ; Public Speaking ; Recent Advances in Palezography. 
Group II. Sociar anp Historica StupieEs, including: The Economic 
Evolution of the X1Xth Century: The Settlement of St. Columba in 
Iona; The Call of John Knox to Reformed Ministry, at St. Andrews ; 
Scottish Civilisation in the Early Centuries, a.p. ; Cosmogonies, Old 
and New; Recent Excavation in Palestine; The Chapel, King’s Col- 
lege ; The Law of Insurance; Johann Sebastian Bach ; Bach’s Original 
Hymn Tunes, illustrated by a choir of voices. 
Group III. Scrence, including ; Evolution ofa Land Flora; Bio-Chemistry ; 
Modern Science and Garden Craft; The Applications of Meteorology 
to Aviation, Gunnery, etc. ; Public Health; The Nervous System of 
Man; Sidelights on Human Disease from the Comparative Pathology 
Standpoint ; Some Recent Advances in Physiology ; The Hive Bee in 
Health and Disease; Recent Progress in Parasitology; Catalysis and 
its Industrial Application. 
The lectures will be given in the forenoons. 
Historical and Scientific Excursions will be arranged for the afternoons. 
Fee Two Guineas for the whole Course ; One Guinea for a week. 
For further particulars apply to the SECRETARY tothe UNIVERSITY 
OF ABERDEEN. 

DICKINSON RESEARCH 
TRAVELLING SCHOLARSHIP IN MEDICINE. 
The Trustees invite applications for the Dickinson Research Travelling 
Scholarship in Medicine. 
The Scholarship is of the value of £300, tenable for one year. Candi- 
dates must have graduated at the University of Manchester in Medicine and 
Surgery in any one of the three academic years immediately preceding the 
award of such Scholarship, and must have earned distinction in so doing. 
A copy of the Regulations governing the Scholarship can be obtained 
from the undersigned, to whom six copies of application should be sent not 
later than Tuesday, May 1, 1923. 
FRANK G. HAZELL, 
Manchester Royal Infirmary, 
March 2, 1923. Secretary to the Trustees. 

ROYAL HOLLOWAY COLLEGE 
(UNIVERSITY OF LONDON). 
The Easter Term commences on Monday, April 23, 1923. THE 
SCHOLARSHIP EXAMINATION in 1924 will be held in Marcu in- 
stead of Aprit, and the closing date of entry will be FEBRUARY 9, 1924. 
Further particulars may be obtained from the Secrerary, Royal Holloway 
College, Englefield Green, Surrey. 

H.M. SIGNAL SCHOOL, 
R.N. BARRACKS, PORTSMOUTH. 
Applications are invited for two vacancies for ENGINEERS, GRADE 
Il., in the LABORATORY SECTION of the above School. The duties 
concern the development of Wireless Telegraphy, etc., for Naval purposes. 
Preference given to candidates possessing an Honours Degree in Physics or 
Electrical Engineering. 
The salary scale is £150, rising by annual increments of £10 to £300 per 
annum, plus bonus based on the average cost of living figure. The minimum 
pay plus bonus at present is £244 per annum. 
The appointments are not established and the Federated Universities 
Superannuation Scheme is applicable. 
Applications giving full particulars of the candidate’s experience, War 
Service, etc., should be addressed to ‘HE SECRETARY OF THE ADMIRALTY 
(C.E.), Admiralty, S.W.1, from whom further particulars of the duties, etc., 
can be obtained. 

UNIVERSITY OF LONDON. 
The Senate invite applications for the ASTOR CHAIR of PURE 
MATHEMATICS tenable at University College. Salary £1000 a year. 
Applications (12 copies) must be received not later than first post on May 24, 
1923, by the Acapemic ReGistRAR, University of London, South Ken- 
sington, S.W.7, from whom further particulars may be obtained. 

BEDFORD COLLEGE FOR WOMEN 
(UNIVERSITY OF LONDON). 
The Council of Bedford College invite applications for the posts of 
(i) DEMONSTRATOR in ORGANIC CHEMISTRY; (ii) DEMON- 
STRATOR in [INORGANIC and PHYSICAL CHEMISTRY; (iii) 
PART-TIME ASSISTANT in LATIN. 
Candidates must have an Honours Degree or its equivalent. 
Applications must be received not later than Saturday, April 28. 
be Le eotaoae apply to the Secrerary, Bedford College, Regent's 
Park, N.W.x1. 


[MaRcH 31, 1923 
UNIVERSITY OF LONDON. 
The Senate inyite applications for the following UNIVERSITY 
READERSHIPS tenable at Bedford College : 
READERSHIP in GEOGRAPHY, salary £700 a year. 
READERSHIP in MATHEMATICS, salary £500 a year. 
Applications (12 copies) for either post must be received not later than 
first post on April 13, 1923, by the AcaBemic REGISTRAR, University of 
Lone South Kensington, S.W.7, from whom further particulars may be 
obtained. 


UNIVERSITY OF LONDON. 
The Senate invite applications for the following posts : 
UNIVERSITY CHAIR of PHYSIOLOGY tenable at King’s College. 
Salary £800 a year. 
UNIVERSITY READERSHIP in Physics tenable at Guy's Hospital 
Medical School. Salary £400 a year. 
Applications (12 copies) must be received not later than first post on 
May 19 and 16, 1923, respectively, by the AcapEmic REGISTRAR, University 
a Ponda South Kensingten, S.W.7, from whom further particulars may 
be obtained. 
UNIVERSITY OF LONDON, KING’S 
COLLEGE. 
The Delegacy require the services of a DEMONSTRATOR in BOTANY 
(man). Salary £250 per annum. The duties will commence in April. 
Opportunities will be given for research work. 
*Applications, with two copies of not more than three recent testimonials, 
should be received not later than April 10 by the Secretary, King’s 
College, Strand, W.C.2, from whom further particulars may be obtained. 
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 Manvfacturing 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, 
Metrology, Calorimetry, Illumination, Acoustics, Electrical 
Measurement, Research. 
BIOLOGICAL AND GEOLOGICAL DEPARTMENT. 
Courses for B.Sc., etc., in Botany, Geology, Mineralogy, Zoology, 
Special Courses in Bio-chemistry, Bio-physics, Bacteriology, 
Physiology, Hygiene, Entomology, Plant Pathology. Course for 
Tropical Planters, Research, 


SIDNEY SKINNER, M.A., 
Telephone: Kensington 89. Principal. 
- BATTERSEA POLYTECHNIC. 
LONDON, S.W.11. * 
Principal—Rosert H. Pickarp, D,Sc., F.R.S. 

Full-time day courses in Engineering (Mechanical, Civil and Electrical), 
Chemistry, Flour Milling, Physics, Mathematics. 
Students prepared for University of London Internal Degrees, A.I.C. 
Examination, and Polytechnic Diplomas. 
Evening courses in Engineering, Chemistry, Physics, Mathematics, and — 
Music in preparation for Internal Degrees in the Faculties of Science, 
Engineering and Music. 
Library, Writing Room, Common Rooms, Refreshment Rooms, large 
Athletic Ground, etc. 
Particulars on application to the PrincipaL. 

TO SCIENTISTS AND RESEARCH STUDENTS. 
THE INTERNATIONAL BIBLIOGRAPHICAL 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. English representative: ‘‘ALEXANDRIAN,” IA 
Longridge Road, Earl's Court, S.W.5. ‘ 
FIRM OF CONSULTING CHEMISTS 
in North of England require Chemist with experience in organic work. 
Apply, giving particulars of training, experience, etc., to Box No. 68, 
c/o Nature Office. 4 
JUNIOR CHEMIST WANTED for Hos- 
pital Laboratory in North Wales. Graduate with training in physio- 
logical chemistry preferred. Reply stating age, particulars of training 
and salary required to Box 67, c/o Nature Office. 




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