Xxil 
ROYAL INSTITUTION OF 
GREAT BRITAIN, 
ALBEMARLE STREET, PICCADILLY, W. 
Prof. L. C. Mraz, F.R.S., will on Thursday next, May 25th, at Three 
o'clock, begin a Course of Two Lectures on ‘‘ Water Weeds.”” 
Subscription for this Course, Half-a-Guinea. 
INDIAN GEOLOGICAL SURVEY. 
Required for the Geological Survey of India, a Specialist, who should 
have a thorough training in Field Geology, and experience in carrying out 
Geological Surveys, as well as in conducting economic inquiries in connection 
with Coal-fields. 
Candidates, under 40 years of age, are invited to apply to the Under- 
Secretary ofState, India Office, Whitehall, London, not later than the 
asth June, with Certificates of Qualifications and of Age. 
The Salary of the Post is g00 Rupees a month; and the Appointment will 
be for a term of five years. 
Further particulars will be furnished on written application to the 
REVENUE SECRETARY, India Office, Whitehall. 
A. GODLEY, Under-Secretary of State. 
India Office, 3rd May, 1890. 
SWANSEA MUNICIPAL TECHNICAL 
SCHOOL. 
G. S. TURPIN, M.A., D.Sc., Principal. 
Applications are invited for the Post of ASSISTANT LECTURER in 
MECHANICAL ENGINEERING. 
Candidates must have had Workshop experience anda Scientific training ; 
proved ability to teach would be a strong recommendation 
The Salary offered is £120 per annum. A Statement of Duties may be 
obtained on application from the SECRETARY OF THE SCHOOL. 
Applications, with one set of copies of testimonials, should be received 
not later than Wednesday, May 24th. 
L. COLLWYN LEWIS, Secretary. 
BOROUGH OF SWANSEA. 
INTERMEDIATE AND TECHNICAL SCHOOL 
FOR BOYS. 
An ASSISTANT MASTER will be required in September to teach 
Puysics (THEORETICAL and PRacTICAL) and some MATHEMATICS. 
Candidates must have had experience in teaching, and be well acquainted 
with Laboratory Work in Physics, as taught in Schools. 
The Salary offered is 4150 per annum. Further particulars may be 
obtained on application from the SECRETARY. 
Applications, with one set of copies of testimonials, should be addressed 
tothe Heap Master, and should reach him not later than Wednesday, 
May 24th. 
L. COLLWYN LEWIS, Secretary. 
UNIVERSITY COLLEGE, LONDON. 
JODRELL PROFESSORSHIP OF ZOOLOGY. 
This Chair will be vacant by the resignation of Prof. Weldon at the close 
of the present Session. 
Applications, accompanied by such testimonials as Candidates may wish 
to submit, should reach the Secretary by Monday, June 5, 1899. 
Further information will be sent on application to the SECRETARY. 
The new Professor will enter on his duties in the October following. 
J. M. HORSBURGH, M.A., Secretary. 
~ UNIVERSITY OF ST. ANDREWS. 
CHAIR OF PATHOLOGY. 
In accordance with the terms of Ordinance No. 47 (St. Andrews, No. 6) 
of the Commissioners, under the Universities (Scotland) Act 1889, the 
University Court will appoint a PROFESSOR OF PATHOLOGY, who 
shall conduct Classes at Dundee qualifying for graduation in Medicine ; 
‘the appointment to date from October 1, 1899. Applications, accompanied 
by twenty copies of testimonials, to be lodged by 21st JUNE next, with 
Mr. J. E. Witttams, Secretary of the University, from whom further 
information may be obtained. 
St. Andrews, May 1899. 
UNIVERSITY OF ST. ANDREWS. 
The UNIVERSITY COURT OF ST. ANDREWS will, at a meeting 
to be held in the month of July, appoint an ADDITIONAL EXAMINER 
for Graduation in the subject of NATURAL HISTORY, 
Applications, with testimonials, to be lodged by 21st June next with the 
undersigned, from whom further information may be obtained. 
JNO. E. WILLIAMS, Secretary. 
St. Andrews, May, 1899. 
RESEARCH. 
CHEMISTRY. PHYSICS. — BACTERIOLOGY. 
Well-fitted LABORATORIES can be used for RESEARCH at any hour 
convenient to Workers. Dark Room for PHOTOGRAPHIC and other 
Work. ysimmersion for MICRO-PHOTOGRAPHY. Workshop for 
making Apparatus. ELECTRIC MAINS, powerful Constant Currents. 
—“ 'T.” 9 Heathcote Street, Gray's Inn Road. 
NATURE 
[May 18, 1899 
BIRKBECK INSTITUTION, — 
Breams Buildings, Chancery Lane, E.C, 
Principat: G. ARMITAGE-SMITH, M.A. 
DAY AND EVENING CLASSES. 
UNIVERSITY OF LONDON.—Complete Day Courses for all the 
Examinations in Science, and Complete Evening Courses for all the 
Examinations for the Science, Arts, and Law Degrees. 
SCIENCE CLASSES in every Branch, with Practical Work.  Well- 
equipped Laboratories for Chemistry, Physics, Biology, Botany, 
Geology, Mineralogy, and Metallurgy. 
CONJOINT BOARD : Lectures and Practical Work in Chemistry, Physics, 
Biology, and Practical Pharmacy. NEW TERM for Conjoint Board 
and Inter. M.B. Examinations has just commenced. 
Prospectus, Calendar (6d.), and Syllabuses of Classes on application to the 
Secretary. 
EGYPTIAN GOVERNMENT SCHOOLS. 
FIVE ASSISTANT MASTERS REQUIRED, to begin work in 
October, in Cairo Secondary School, under Ministry of Public Instruction. 
Masters to teach in English exclusively—one of them principally Physics 
and Chemistry, two of them principally Mathematics, and the two others 
principally English. Over three hundred boys. English Head Master. 
Teaching hours on an average, three daily—Fridays excepted. Summer 
vacation not less than two months annually. Graduates of Oxford or 
Cambridge preferred. Salary about £295 per annum (L. Eg. 288), rising 
to about £393. Civil Service Pension Scheme. 
Allowance for passage out to Egypt. ; : Z 
Applications, accompanied by copies only of testimonials, must be sent in 
before June 30, 1899, marked outside “* English Masterships,” and addressed 
to the SECRETARY-GENERAL, Ministry of Public Instruction, Cairo, Egypt, 
to whom Candidates may apply for further information. 
MUNICIPAL TECHNICAL SCHOOLS, 
PLYMOUTH. 
WANTED, an ASSISTANT MASTER (Undergraduate in Science 
preferred), mainly for School of Science work. Must have good teaching 
experience. Salary £roo per annum, rising by annual increments of £10 to 
4120. Full particulars from 
T. W. BYFIELD, Secretary. 
RESEARCH (Biological). — COLLABOR- 
ATEUR (or PUPIL) WANTED by Man of Science in important 
work to be shortly published. Use Laboratory. Terms by arrange- 
ment. Good Mathematics and Physics preferred.—Write ‘‘ ScrENCE,” 
c/o NATURE. 
TUITION._ALL EXAMINATIONS 
—MEDICAL AND SCIENTIFIC. Well-fitted Laboratories.— 
**R.C.," 9 Heathcote Street, Mecklenburgh Square. 
PALAZARCTIC MOLLUSCA.— One of the 
largest Collections in Europe, containing many Types, together with an 
extensive Malacological Library, for Sale.—For particulars and price 
apply to ‘“*G. W.,” c/o of Goutp's Advertising Offices, 54 New Oxford 
Street. 
‘ Sale by Huction. 
TUESDAY, MAY 30. . 
A VALUABLE COLLECTION OF BRI'tISH AND FOREIGN 
BIRDS AND EGGS. 
MR. J. C. STEVENS will Sell the above 
by Auction, at his Great Rooms, 38 King Street, Covent Garden, as 
above, at 12.30. s 
On view the Day prior, 10-4, and Morning of Sale, and Catalogues had. 
FREDK. JACKSON & Go. 
(Late MOTTERSHEAD & CO.), 
[44 CROSS STREET, MANCHESTER, 
Goods Entrance: 10 Half-Moon Street, 
LABORATORY FURNISHERS, 
Importers, Manufacturers, and Dealers in 
CHEMICAL AND PHYSICAL 
APPARATUS 
Of every Description. 
Fine Chemicals, Volumetric Solutions, 
Plain and Stoppered Bottles, 
AND EVERY LABORATORY REQUIREMENT. 
Illustrated Catalogue of Apparatus, with Price 
of Chemicals, free on application. 
Telegraphic Address—‘‘ APPARATUS, MANCHESTER.” 
Telephone Number—2038. 
Apparatus for estimation of sulphur in spent oxide. 
