CXXIi 


RONTGEN SOCIETY 
THE SILVANUS THOMPSON 
MEMORIAL LECTURE 

The Sixth Annual SILVANUS THOMPSON 
MEMORIAL LECTURE will be delivered by 
Mr. C. THURSTAN HOLLAND, D.L., Ch.M., 
Honorary Consulting Radiologist, Liverpool Royal Infirmary, 
on TUESDAY, May 1, 1923, at 
The Institution of Electrical Engineers, Savoy 
Place, Victoria Embankment, London, W.C.2, 
at 8.15 P.M. Entrance free to those who are interested. 

UNIVERSITY OF LONDON. 
A Course of Eight Lectures on ‘‘ Nurrition” will be given by Prof. 
Vv. H. MOTTRAM, M.A. (Professor of Physiology in the University), at 
Kinc’s CoLLeGe FoR WOMEN, HOUSEHOLD AND Sociat Science Depart- 
MENT (61 Campden Hill Road, W.8), on Monpvays and WEDNEsPAays, 
April 30, May 2, 7, 9, 14, 16, 23, and 28, at 4.30 p.m. ADMISSION 
FREE, WITHOUT TICKET. 
EDWIN DELLER, Academic Registrar. 
UNIVERSITY OF LONDON. 
The following Lectures have been arranged : 
A Lecture on “ PropteMs oF FUNDAMENTAI AsTRONOoMY ” by Professor 
W. ve SITTER (Professor of Astronomy in the University of Leiden) in 
the department of Physics, Imrertat COLLEGE oF ScinNCE AND TECHNO- 
Locy, Imperial Institute Road, South Kensington, S.W., on Monpay, 
May 7, at 5-15 7.M. The Chair will be taken by the Astronomer-Royal 
(Sir Frank Dyson, LL.D., F.R.S.). 
A Lecture on “THe Evecrric CHarce or Cortoips” by Dr. H.R. 
KRUYT (Professor of Physical Chemistry in the University of Utrecht) in 
the department of Chemistry, University Co-cece, London (Gower Street, 
W.C.), on TuEspay, May 8, at 5 P.M. The Chair will be taken by Professor 
F. G. Donnan, C.B.E., F.R.S. (Professor of Chemistry in the University). 
A Course of Three Lectures on ‘‘ PHASES OF INDIAN GEoLoGcy” by ‘The 
Hon. Sir THOMAS H. HOLLAND, K.C.S.1., K.C.LE., F.R.S. (Rector 
of the Imperial College of Science and Technology), at University 
CoLLEGE, London (Gower Street, W.C.), on WEDNESDAYS, May a, 23, and 
30, at 5.15 p.m. At the First Lecture the Chair will be taken by The Right 
Hon. Lord Cuetmsrorp, G.C.M.G., G.C.S.1., G.C.1.E., G.B.E. 
ADMISSION TO THE LECTURES IS FREE, WITHOUT 
TICKET. 
EDWIN DELLER, Academic Registrar. 
BEDFORD COLLEGE FOR WOMEN 
(UNIVERSITY OF LONDON), 
REGENT’S PARK, N.W.1. 
Princtpal—Miss M. J. Tuke, M.A. 
Degree Courses in Arts and Science. Course of Training in Social Work. 
For Resident and Day Students, 
Easter Term begins THurspay, April 26, 1923. 
AGRICULTURAL RESEARCH. 
The MINISTRY OF AGRICULTURE AND FISHERIES is pre- 
pared to receive, not later than May 15 next, applications for grants in aid 
of scientific investigations bearing on agriculture to be carried out in 
England and Wales during the academic year commencing October 1, 1923. 
The conditions on which these grants are offered are set out on the pre- 
scribed form of application (A. 230/1), of which copies may be obtained from 
2 ere Ministry of Agriculture and Fisheries, Whitehall Place, 
S.W.x. 
April 1923. 
MUSEUM OF PRACTICAL GEOLOGY, 
28 JERMYN STREET, LONDON, S.W.1. 
The Museum is closed for repairs till further notice. 
The offices and library of the Geological Survey are open to callers, 
April 13, 1923. JOHN S. FLETT, Director. 
TUITION BY CORRESPONDENCE 
Rapid preparation by highly qualified tutors for 
MATRICULATION, 
Intermediate and Final B.A. and B.Sc., 
OXFORD AND CAMBRIDGE LOCALS. 
Single subjects may be taken :—Latin, Greek, Hebrew, French, 
Mathematics, Chemistry, Logic, etc. For terms address— 
Mr. J. CHARLESTON, B.A. (Hons. Oxon, & Lond.), 
14 Elsham Road, Kensington, W.14. 

NATURE 

[APRIL 21, 1923 

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 1. Salary £350 to £400 a year, in accordance with quali- 
fications and experience. It is desirable,ybut 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. 
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. 
2 er a Se apply to the Secrerary, Bedford College, Regent's 
ark, . Ie 

INDUSTRIAL TRAINING AND TECHNICAL EDUCATION. 4 
Appointment desired as DIRECTOR ; fifteen years British, Continental, 
and Colonial experience. Fighting service with His Majesty's Forces, 
1915-1919. Physically fit. Will proceed any part of Empire. 
Address: ‘‘'CEME,” c/o NaturE. 
N.&.—Transit letter and reply takes 40 days. : 
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, 8.W.s. 
WANTED to purchase set Geological 
Magazine, also collection of geological and geographical books as 
nucleus of a University library. Teaching collections and apparatus 
“8 required. Professor L. DupLey Sramp, Killiecrankie, Sidcup, 
Cent. 
FOR SALE—“ Electrician,” Vol. 42 to Vol 48 
inclusive (Bound). ‘‘ Journal of Institution of Electrical Engineers,” 
Vol. 46 to Vol. 60 inclusive (Unbound). 
Apply H. T., 4 York Mansions, Battersea Park, S.W.11. 
STUDENT desires useof calculating machine 
—anywhere in London. H1trcucock, 36 Adelaide Road. Brockley. 





ACCURATE CHEMICAL THERMOMETERS.— 
110° C., 150° C., 250° F., 300° F., 25.; 200° C., 25. 6d. ; 360° C., 400° F, 
35. ; 500" C., gasfilled, special glass, ros, Beckmann’s Thermometers with 
Auxiliary Scale, y45° C., 22s. 6d. each, Approval.—CuEeLp, Chesham. 


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