clxii 
THE UNIVERSITY OF LIVERPOOL. | 
SESSION 1916-17. 
FACULTY OF ENGINEERING. 
Dean—J. Wemyss AnDERSON, M.Eng., M.Inst.C.E. 
Prospectuses and full particulars of the following may be obtained on 
application to the RecisTrar :—Engineering, Electrical Engineering, 
Civil Engineering, Naval Architecture, Marine Engineering, Enginecring 
Design and Drawing, Refrigeration, Mathematics, Physics, Inorganic 
Chemistry. 
PHYSIOLOGY.—Private lessons given by 
experienced coach for all Medical Exams. and B.Sc., laboratory work, 
practice in ‘‘spotting,”’ &c. Fees reasonable. Easy reach of Central 
London.—Apply “ P.,” Box 25, c/o Nature Office. 
SOUTH AFRICAN SCHOOL OF MINES 
AND TECHNOLOGY, JOHANNESBURG. 
WANTED, a LECTURER for the DEPARTMENT of CHEMISTRY. 
One who has had works experience, with ability for research, would be pre- 
erred. Salary £450 per annum, rising by annual increments of £50 to £600. 
The sum of £50 will be allowed for travelling expenses to South Africa, and 
half salary from date of sailing till arrival in Johannesburg. A three years’ 
engagement will be given. A medical certificate will be required before 
appointment. Members of the staff have to supervise and take part in 
evening work. Applications and testimonials in triplicate, stating age and 
qualifications, to be sent to CuaLMers GuTHrig & Co., Limitep, 9 Idol 
l.ane, London, E.C. No application from those fit for military service will 
be entertained. 
LL 
WANTED, for the Heckmondwike Secon- 
dary School, an ASSISTANT MASTER, must be well qualified in 
mathematics; chemistry or physics or German a recommendation. 
Salary commencing at £170 per annum Application forms, which can 
be obtained at the School, must be returned to the Headmaster on or 
before February 9. 
A. H. REDFEARN, Clerkito the Governors. 
SCIENTIFIC JOURNALS WANTED. 
We buy sets and runs of Journal of the Chemical Society (early 
vols, especially), Proceedings and Transactions of the Royal 
Society, Journal of the Royal Horticultural Society (first 6 vols.), 
Journal of Physiology, Philosophical Magazine, Journal of Botany, 
Geological Magazine, Liverpool Literary and Philosophical Society, 
etc. Also Natural History Books (especially with coloured plates). 
Catalogues Issued. New Books and Journals Supplied. 
JOHN WHELDON & CO., 
38, Great Queen Street, Kingsway, London, W.C. 
Messrs, W. HEFFER & SONS, 
BOOKSELLERS, CAMBRIDGE, 
Are OPEN TO PURCHASE 
complete sets of the following :— 
American Journal of Physiology, 
Berichte der Deut. Chemischen Ges., 
Messenger of Mathematics, 
Philosophical Magazine, 
Zeitschrift fur Physikalische Chemie, 
Flora, etc., etc. 
Librarians, Professors, Executors, and 
others desirous of disposing of the above 
or any other Scientific Periodicals 
and Books, both English and Foreign, 
are invited to communicate with them. 
Best Prices Given. Licensed Valuers for Probate. 
NATURE 
[JANUARY 25, I917 
BIRKBECK COLLEGE, 
BREAMS BUILDINGS, CHANCERY LANE, E.C. 
COURSES OF STUDY (Day and Evening) for Degrees of the 
UNIVERSITY OF LONDON in the 
FACULTIES OF SCIENCE & ARTS 
(PASS AND HONOURS) 
Under RECOGNISED TEACHERS of the University. 
SCIENCE.—Chemistry, Physies, Mathematies (Pure and 
Applied), Botany, Zoology, Geology. 
ARTS.—Latin, Greek, English, French, German, Italian, 
History, Geography, Logie, Economies, Mathematies (Pure 
and Applied). 
Evening Courses for the Degrees in Economics and Laws. 
POST-GRADUATE AND RESEARCH WORK, 
. Day: Science, £17 10s.; Arts, £10 10s. 
SESSIONAL FEES twee Science, Arts, or Economics, £5 5s, 
Prospectus post free, Calendar 3d. (by post sd.), from the Secretary. 
SOUTH-WESTERN POLYTECHNIC 
INSTITUTE, CHELSEA. 
The following Special Course will be given during the Lent term, 1917 :— 
MILK AND MILK PRODUCTs, 
By Mr. Cecit Revis, A.C.G.1., F.C.S., Chief Chemist, 
Messrs. Welford & Sons, Ltd. 
A course of about 8 lectures on Thursday evenings at 7.30 p.m., beginning 
Thursday, February ¢, 1917. A detailed syllabus of the course may be 
obtained on application to the Secretary (Room 44). 
Telephone : Western 899. SIDNEY SKINNER, M.A., Principal. 
CHEMICAL JOURNAL, 1917.—Wanted a 
subscriber willing to sell at a reduced price and deliver month by 
month.—Appiy Box 220, c/o Naruke Office. 
For Advertisement Rates, Terms of 
Subscriptions, Gc., see page cixvii 
of the present issue of “‘ Nature.”’ 
SCIENCE PROGRESS 
A QUARTERLY REVIEW OF SCIENTIFIC 
THOUGHT, WORK, AND AFFAIRS. 
Edited by Lieut-Col. Sir RONALD ROSS, 
K.C.B., R.A.M.C. (T.F.), F.R.S., N.L., M.D., &c. 
CONTENTS FOR JANUARY, Ss. net. 
Articies: Scientific Parliamentary Reform. W. H. 
Cowan, M.P. 
A Theory of Colour Vision. 
D.Se. 
The Jaw of the Piltdown Man. 
F.Z.S., A.L.S. 
What is a Disease? (in part). Dr. CHARLES 
MERCIER. : 
La _ Doctrine Sociologique d’Emile Waxweiler. 
N. Ivanitsxy. F. Van LANGENHOVE. 
Popular Science: The Oldest Flint Implements. 
J. Reto Motr. 
Essay - Review: The 
Ronap Ross). 
Recent Advances.in Science: Philosophy ; 
R, A. Housroun, 
W. P. Pyrcrart, 
Sister of Science (Sir 
Mathematics; Astronomy; Physics; Physical 
Chemistry ; Inorganic Chemistry; Geology; 
Anthropology. 
Correspondence. Notes. 
Essays: The Theory of Integral Equations and 
the Caleulus of Operations and Functions (H. 
BaTeMAN). Humanistic Culture through the 
Study of Science (G. N. Prnarifr). 
Reviews of Books. 
a ee Oo 
JOHN MURRAY, Albemarle Street, LONDON, W. 
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