OF SCIENCE AND TECHNOLOGY 
SOUTH KENSINGTON, LONDON, s.W. 
The following Special Courses of Advanced Lectures will be 
given, commencing in October next, at the 
ROYAL COLLEGE OF SCIENCE. 
Subject. Conducted by 
z Prof. A. R. ForsyTH, Se.D., 
CALCULUS OF VARIATIONS Math.D., LL.D., F.RS. 
FUNCTIONS OF Two oR More) Prof. A. R. ForsyTH, Sc. D., 
CoMPLEX VARIABLES Math.D., LL.D., F.R.S. 
THe THEORY OF Sets OF PoINTs Assist.-Prof. RICHARDSON 
AND THE THEORY OF A REAL AS RCS, B.Sc. c 
VARIABLE nat a Re 
Assist.-Prof. FOWLER, 
SPECTROSCOPY ... 44 fs A.R.C.S., F.R.A.S., 
F.R.S. 
Assist. -Prof. SCHRYVER, 
Bio-CHEMISTRY ... -D.Sc., Ph.D. 
Soi BACTERIOLOGY Mr. S. G. PAIng, B.Sc., 
RylG: 
LAPworTH, 
ENGINEERING GEOLOGY, Part of M. Inst 
(of 3 Courses) in Economic 5 
GEOLOGY a iS vai C.E., F.GS. 
For further particulars of these and other Courses to follow, 
application should be made to THE REGISTRAR. 
SESSION OPENS 29th SEPTEMBER, 1013. 
EAST LONDON COLLEGE 
(UNIVERSITY OF LONDON). 
FACULTIES OF ARTS, SCIENCE, AND 
ENGINEERING. 
FEES: TEN GUINEAS PER ANNUM. 
NO ENTRY FEE AND NO REGISTRATION CHARGES. 
Special fees and facilities for Post Graduate 
and Research Students in all Faculties. 
M.A. CLASSES FOR MATHEMATICS. 
Calendar, with lists of Graduates, University and College 
Scholarships, Academic and other distinctions, post free on 
application to the Registrar, or the Principal, 
J. L. S. HATTON, M.A. 
Telephone No.: East 3384. 
ENGINEERING AND TECHNICAL OPTICS. 
NORTHAMPTON POLYTECHNIC INSTITUTE, 
CLERKENWELL, LONDON, E.C. 
MECHANICAL AND ELECTRICAL ENGINEERING. 
Full Day Courses in the Theory and Practice of the above Subjects will 
commence on Monday, September 29, 1913. The courses in Mechanical 
Engineering include specialisation in Automobile and Aéronautical 
Engineering, and those in Electrical Engineering include specialisation in 
Radio-Telegraphy. ENTRANCE EXAMINATION on Wednesday and 
Thursday, September 24 and 25. These courses include periods spent in 
Commercial Workshops, and extend over four years. They also prepare 
for the degree of B.Sc. in Engineering at the University of London. Students 
well grounded in Science, Mathematics and Drawing may be admitted 
direct to the second year’s course. Fees, £15 or £11 per annum. 
THREE ENTRANCE SCHOLARSHIPS of the value of £52 each will 
be offered for competition at the Entrance Examination in September next. 
TECHNICAL OPTICS. 
Full and Part Time Day Courses in all branches of this important 
department of Applied Science given in specially equipped laboratories 
and lecture rvoms. 
Full particulars as to fees, dates, &c., and all information respecting the 
work of the Institute, can be obtained at the Institute or on application to 
R. MULLINEUX WALMSLEY, D.Sc., Principal: 
NATURE 
[SEPTEMBER 18, 1913 
THE SIR JOHN CASS TECHNICAL 
INSTITUTE, 
JEWRY STREET, ALDGATE, E.C. 
The following Special Courses of Instruction will be given 
during the Autumn Term, 1913. 4 
THE THEORY AND APPLICATIONS OF 
MATHEMATICAL STATISTICS. 
By E. C, SNOW, M.A., D.Se. 
A Course of 10 Lectures on the modern mathematical methods 
of dealing with statistical data in Social, Educational, Economic, 
and Medical problems, suitable to teachers and siudents of — 
economics, Opportunity will be given to students to take up 
problems on their own account, and assistance and direction 
will be given for such work. 
Thursday, 5.30 to 6.30 p.m. The first Lecture of the Course 
will be given on Thursday, October 9, 1913. 
THE METHODS OF DIFFERENTIAL AND INTEGRAL 
CALCULUS, AND THEIR APPLICATION TO 
CHEMICAL AND PHYSICAL PROBLEMS. 
By R. S. WILLOWS, M.A,, D.Sc. 
A Course of 10 Lectures for those engaged in Chemical and 
Electrical industries and students of Physical Chemistry, in 
which the subject will be treated more as a means of 
chemical and physical investigation rathet than from the 
mathematician’s standpoint. 
The standard of Mathematics required on joining the class 
will not go beyond an elementary knowledge of Algebra. 
Friday, 7 to8 p.m. The first lecture of the Course will be 
given on Friday, October 10, 1913. 
Detailed Syllabus of the Courses may be had upon application 
at the Office of the Institute, or by letter to the PRINCIPAL. 
THE SIR JOHN CASS TECHNICAL © 
INSTITUTE, ; 
JEWRY STREET, ALDGATE, E.C. 
The following Special Course of Instruction will be given during the 
Autumn Term, 1913 :— 
COLLOIDS. 
The Methods employed in their Investigation 
and their Relation to Technical Problems. 
By E. HATSCHEK, 
A course of ro Lectures and Demonstrations on the nature and 
properties of Colloidal substances, of the methods employed in their 
Investigation, and of the bearing of Colloidal phenomena on Chemical 
and allied Industries. 
Tuesday Evenings, 7 to 8.30 p.m. 
The first lecture of the Course will be held on Tuesday, October 7, 
at 7 p.m. 
Detailed Syllabus of the Course may be had at the Office of the 
Institute, or by letter to the Principat. 
CITY OF LONDON COLLEGE. 
AOTING IN CONJUNOTION WITH THE LONDON CHAMBER OF COMMERCE. 
WHITE S8T., and ROPEMAKER ST., MOORFIELDS, E.C. 
(Near Moorgate and Liverpool Street Stations). 
PRINCIPAL: SIDNEY HUMPHRIES, B.A., LL.B. (Cantab.) 
Michaelmas Term begins Monday, September 20th. 
EVENING CLASSES in SCIENCE. Well-equipped 
LABORATORIES for Practical Work in CHEMISTRY, 
BOTANY, GEOLOGY. 
Special Courses for Pharmaceutical and other examinations. Classes 
are also held in all Commercial Subjects, in Languages, and Literature. 
Art Studio. All Classes are open to both sexes. 
DAY SCHOOL OF COMMERCE. Preparation fora COMMERCIAL 
or BUSINESS career. 
¥ spectuses, and all other information, gratis on application. 
DAVID SAVAGE, Secretary. 
