XXXIV 
NATURE 
[FEBRUARY 3, 1923 

NOTICE 
The Index to Vol. 110° of 
NATURE will be issued with 
the number of the journal to 
be published on Saturday, 
February 10. 
Its price will be 2s. 
ST. MARTIN’S STREET, LONDON, W.C.2 

THERESA SEESSEL RESEARCH FELLOWSHIP 
To promote Original Research in Biological Studies. 
YALE UNIVERSITY. 
One FELLOWSHIP, yielding an income of $1500. Pre- 
ference is given to candidates who have already obtained their 
Doctorate, and have demonstrated by their work fitness to 
carry on successfully original research of a high order. The 
holder must reside in New Haven during the college year, 
October to June. Applications should be made to the DEAN 
of the GRADUATE SCHOOL, New Haven, Conn., before May 1, 
1923; they should be accompanied by reprints of scientific 
publications, letters of recommendation, and a statement of the 
particular problem which the candidate expects to investigate. 

EMIL CHR. HANSEN PRIZE, 1923. 
Under the Fund provided by the late Professor EMIL CHR. HANSEN 
and his wife, a Gold Medal bearing an effigy of Prof. Hansen, accompanied 
by a sum of at least 2000 kroner, is awarded at intervals of two or three 
years, on his birthday, May 8. 
It is proposed to award the Medal this year to an author of 
EXPERIMENTAL RESEARCHES IN MARINE MICKOBIOLOGY. 
The Prize is open to scientific workers of all countries. Committee of 
award for 1923: 
Prof. C. O. JENSEN, Veterinary and Agricultural College, Copenhagen. 
Dr. jous. Scumipt, Carlsberg Laboratory, Copenhagen. 
Prof. S. P. L. S6rensEN, Carlsberg Laboratory, Copenhagen. 
Prof. H. H. Gran, University of Christiania, Norway. 
Prof. C. A. Kororp, University of California, Berkeley, U.S.A. 
For further particulars, apply to THE PresipENT, Board of Trustees, 
Emil Chr. Hansen Fund, Copenhagen, Valby. 

RESEARCH FELLOWSHIPS IN 
ACOUSTICS. 
THE RivERBANK LABORATORIES AT GENEVA, ILLINOIS, announce the 
establishment of one or two RESEARCH FELLOWSHIPS in ACOUS- 
TICS: The holder will have an opportunity to devote his entire time to 
study and investigation in a laboratory built, equipped, and manned for the 
study of acoustic problems. Candidates should be college graduates who 
have taken advanced courses in physics and mathematics, and who have 
shown in their work those qualities essential for success in independent 
investigation. Terms of appointment to be determined by the qualifications 
of the appointee. Address, B. Cumminc, Secretary, Geneva, Illinois. 

THE MURDOCH TRUST. 
For the benefit of INDIGENT BACHELORS and WIDOWERS of 
Good Character, over 55 years of age, who have done ‘“‘something” in the 
way of Promoting or Helping some branch of Science. 
Donations or Pensions may be granted to persons who comply with those 
conditions. 
For Particulars apply to Messrs J. and J. Turneutt, W.S., 58 Frederick 
Street, Edinburgh. 
CHELSEA POLYTECHNIC, 
CHELSEA, S.W.3. 
Day and Evening Courses in Science under Recognised Teachers 
of London University. 
» 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 Industri 
Metrology, Calorimetry, Illumination, Acoustics, Electri 
Measurement, Research. 
BIOLOGICAL AND GEOLOGICAL DEPARTMENT. 
Courses for B.Sc., etc., in Botany, Geology, Mineralogy, Zoology, 
Special Courses in Bio-chemistry, Bio-physics, Backers 
Physiology, Hygiene, Entomology, Plant Pathology. Course for 
Tropical Planters, Research. 
Lent Term began on January 9, 1923. 
SIDNEY SKINNER, M.A. 
Principal. 
Telephone: Kensington 8a9. 

BIRKBECK GOLLECE. 
(UNIVERSITY OF LONDON.) 
Principal—GEORGE SENTER, D.Sc., Ph.D., F.I.C. 
EVENING COURSES for the Degrees of the 
University of London in the Faculty of Science and 
for the Geography Diploma. 
Facilities are also provided during both day and 
evening for Post-Graduate and Research Work, 
Calendar, 1s.; by post, 1s. 5d. Prospectus free. 
For full particulars, apply to the SECRETARY, 
Birkbeck College, Fetter Lane, E.C.4. 

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 Principat. 

APPOINTMENTS BOARD 
OF THE 
IMPERIAL COLLEGE OF SCIENCE 
AND TECHNOLOGY, 
SOUTH KENSINGTON, S.W.7. 
EMPLOYERS requiring men who have received a thorough training in 
Science and Technology, and who are Diplomates or Associates of the 
Imperial College, or of one of its three constituent Colleges, are asked to 
make use of the services of the Board. No fees. 
The Imperial College includes The Royal College of Science, The Royal 
School of Mines, and The City and Guilds (Engineering) Colle The 
Associates of the Colleges receive thorough training in Science ar ch- 
nology, including Aeronautics, Applied Optics and Optical Eng’ eering 
Biology, Chemical Technology, Chemistry (all branches), Engineesing (all 
branches, including Metallurgy, Mining, Mining Geology and Oil Tech- 
nology), Geology, Mathematics and Mechanics, and Physics. 

——o 
| 
