CXXX 
THE SIR JOHN CASS TECHNICAL 
INSTITUTE, 
JEWRY STREET, ALDGATE, E.C. 
The following Special Courses of Instruction will be given during the 
Lent Term, 1917 :— 
BREWING. 
By ARTHUR R. LING, F.1.C. 
A Course of 20 Lectures and assoriatel Laboratory work, Tuesday 
evenings, 7 to 19 pm., commencing TUESDAY, JANUARY 16, 1017. 
THE MECHANICAL TESTING OF METALS 
AND ALLOYS. 
By E. M. BOOTE. 
A Course of Lectures with associated Laboratory work, ‘hursday 
evenings, 7 to 10 p.m., commencing THURSDAY, JANUARY 18, 1917. 
Detailed Syllabus of the Courses may be had upon application at the 
Office of the Institute, or by letter to the Principat. 
UNIVERSITY COLLEGE OF SOUTH 
WALES AND MONMOUTHSHIRE. 
Coleg Prifathrofaol Deheudir Cymru A Mynwy. 
, d f ynwy: 
The Council of the College invites applications for the post of Temporary 
lecturer in Chemistry to Medical Students and ‘lemporary Assistant 
Lecturer and Demonstrator in Chemistry. Salary £200 per annum. 
Further particulars may be obtained from the undersigned, by whom 
applications, with testimonials (which need not be printed), must be received 
on or before January 8, 1917. 
D. J. A. BROWN, Registrar. 
University College, Cardiff, 
December 10, 1916. 
COUNTY BOROUGH OF HUDDERS- 
FIELD TECHNICAL COLLEGE. 
HUDSON, M.A., B.Sc. 
Applicaticn: are invited for the following posts :— 
ASSISTANT LECTURER IN CHFMISTRY. 
DEMONSTRATOR IN BIOLOGY. 
Women eligible. 
Principat - - J. F. 
Salary £150. 
Further particulars on applicaticn. 
T. THORP, Secretary. 
CHEMIST (man or woman), thoroughly 
trained in Organic Chemistry, required for an important Research. 
Applications, stating training, qualifications, and experience in Research, 
and accompanied by testimonials or references, to be lodged not later 
than January 3, 1917. Further particulars can be had on application 
Salary according to qualifications and experience.—Box 268, ROBERTSON 
AND Scort, 21 Hanover Street, Edinburgh, 
ORIENTAL STUDIES. 
THE SCHOOL OF ORIENTAL STUDIES, London Institution, 
Finsbury Circus, K.C., will be OPENED on JANUARY 18, 1917. Courses 
will be held in the Principal Languages of the Near, Middle, and Far East, 
and of Africa. Courses will also be given on Oriental Religions and 
Customs 
Intending Students are invited to apply at once to the undersigned. 
E. DENISON ROSS, Director. 
For Advertisement Rates, Terms of 
Subscriptions, Gc.,see page cxxXxv 
of the present issue of “‘ Nature.’’ 
NATURE 
[DECEMBER 28, 1916 
BIRKBECK COLLEGE, 
BREAMS RUILDINGS, CHANCERY LANE, E.C. 
COURSES OF STUDY (Day and Evening) for Degrees of the 
UNIVERSITY UF LONDON in the 
FACULTIES OF SCIENCE & ARTS 
(PASS AND HONOURS) 
Under RECOGNISED TEACHERS of the University. 
SCIENCE.—Chemistry, Physics, Mathematics (Pure and 
Applied), Botany, Zoology, Geology. 
ARTS.—Latin, Greek, English, Freneh, German, Italian, 
History, Geography, Logic, Economies, Mathematies :Pure 
and Applied). 
Evening Courses for the Degrees in Economics and Laws 
POST-GRADUATE AND RESEARCH WORK. 
aii Day: Science, £17 10s.; Arts, £10 10s. 
SESSIONAL .FEES { Evening: Science, Arts, or Economics, £5 5s, 
Prospectus post free, Calendar 3d. (by post 5d.), from the Secretary. 
SOUTH-WESTERN POLYTECHNIC 
INSTITUTE, CHELSEA. 
Day and Evening Courses in the Faculty of Science and 
Engineering. 
Technical Chemical Courses. 
Pharmacy and Dispensing Courses. 
Particulars may be obtained on application to the Secretary 
(Room 44), SIDNEY SKINNER, M.A., Principal. 
Telephone; Western 800. 
SECOND-HAND BOOKS. 
Librarians, Executors, Private Students, and 
others desirous of either disposing of or 
buying Scientific Books, Periodicals, or 
Books in General Literature, are invited to 
communicate with 
W. HEFFER & SONS, L??: 
CAMBRIDGE, 
Valuers for Probate. 
Catalogue No. 148, Scientific Books and Periodicals, 
post free on application. 
Telegrams and Cables: Herren, CAMBRIDGE. 
Telephone; 862 (two lines). 
SECOND-HAND 
MICROSCOPES, TELESCOPES, SURVEYING AND DRAWING 
INSTRUMENTS, AND OTHER SCIENTIFIC APPARATUS AND 
ACCESSORIES BY ALL THE BEST MAKERS. 
338 HicH HOLBORN, CLARKSON’S 
(Opposite Gray's Inn Road.) 
LONDON, W.C. 
