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Printed by RICHARD CLAY AND SONS, LIMITED, at ; & 8 Bread Street Hill, Queen Victoria Street, in the City of London, and published by MACVILLAR

AND Co., LIMITED, at St. Martin's Street, London, W.C., and THE MACMILLAN COMPANY, 66 Fifth Avenue, New York.-THURSDAY, July 13. 1905.

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A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE

"To the solid ground

Of Nature trusts the mind which builds for aye."-WORDSWORTH.
No. 1864, Vol. 72]
THURSDAY, JULY 20, 1905

[Price 15 CENTS Registered as a Newspaper at the General Post Office.)

(All Rights are Reserved.

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R. & J. BECK, Ltd., 68 CORNHILL, LONDON.

PRACTICAL NOTES ON
TELEPHOTOGRAPHY.

Free on application to
R. & J. BECK, Ltd., 68 CORNHILL, LONDON.

Further Particulars and Prices of this and other long range Barometers sent on application

to the ManufacturersNEGRETTI & ZAMBRA,

38 HOLBORN VIADUCT, E.C. Branches: 45 CORNHILL, and 122 REGENT

MINISTRY of PUBLIC INSTRUCTION, BIRKBECK COLLEGE

EGYPT.
POLYTECHNIC SCHOOL OF ENGINEERING.

BREAMS BUILDINGS, CHANCERY LANE, E.C. An INSTRUCTOR in ENGINEERING is required to begin work on

FACULTY OF SCIENCE,
September 30 in the Polytechnic School of Engineering, Ghizeh (near
Cairo).

DAY AND EVENING COURSES.
The Instructor appointed will be engaged in teaching Descriptive
Engineering and Hydraulics.

J. E. MACKENZIE, Ph.D., D.Sc.

Chemistry ... .. . H. WkEn, Ph.D., B.A., B.Sc. Candidates must have had practical experience as engineers, and have been engaged on work of a class intimately related to the subjects to be

ALBERT GRIPPITHS, D.Sc. taught. They should be from 25 to 35 years of age, unmarried, and have a

Physics ... ..

D. OWEN, B.A., B.Sc. robust constitution.

(B. W. CLACK, B.Sc. A University Degree or Diploma in Engineering is an essential qualifi. Mathematics

2. H. SMART, M.A.

... cation.

" W. G. Birt, B.A., B.Scos Salary about £430 per annum (£Eg. 35 per mensem), rising to about

Botany...

JA. B. RENDLE, M.A., D.Sc. 6553 per annum (4 Eg. 45 per mensem). Allowance for passage out to

*** (F. E. FRITSCH, Ph.D., B.Sc. Egypt. Bachelor quarters are provided.

Zoology..

.. H. W. UNTHANK, B.A., B.Sc. Applications, with full statement of qualifications, and accompanied by

Geology & Mineralogy ... Geo. F. HARRIS, F.G.S. copies only of testimonials, must be sent in before July 22, 1905, addressed Assaying, Metallurgy & Mining. Geo. PATCHIN, A.R.S.M. to w. C. MACKENZIE, Esq., D.Sc., 5 The Crescent, Cromer, to whom

RESEARCH in Chemistry and Physics in well-equipped laboratories. candidates may apply for further information.

French, German, Spanish, Russian, Dutch, & Itallan Classes. MINISTRY of PUBLIC INSTRUCTION, EVENING CLASSES also in Biology, Physiology, Practical Geometry, EGYPT

Building and Machine Construction, Steam, Tbeoretical and Applied

Mechanics, Land and Quantity Surveying, and Estimating.
SCHOOL OF AGRICULTURE.

Calendar 6d. (post free 8d.), on application to the SECRETARY.
An INSTRUCTOR in LAND SURVEYING and FARM
ENGINEERING is required to begin work on September 30 in the At the SOUTH-WESTERN POLYTECHNIC,
School of Agriculture, Ghizeb (near Cairo).

erence will be given to candidates having experience of Practice and Manresa Road, Chelsea, S.W., Day College Courses of thirty bours Teaching. They should be from 23 to 33 years of age, unmarried, and bave

per week will be conducted in preparation for the London University a robust constitution.

Degrees of B.Sc. in Mechanical and Electrical Engineering, in ChemisA University Degree or College Diploma is an essential qualification,

try, Physics and the Natural Sciences. The composition fee for the Salary about £295 per annum (£ Eg. 24 per mensem), rising to about Session of three terms, 1905-1906, is $15. These Courses are recog. 5393 per annum (& Eg. 32 per mensem). Allowance for passage out to

nised for "Internal Students of the University, and consist of Egypt. Bachelor quarters are provided.

lecture and laboratory instruction. The Courses are conducted by :

MECHANICAL ENGINEERING, W. W. F. Pullen, A. Macklow Applications, with full statement of qualifications, and accompanied by

Smith; ELECTRICAL ENGINEERING, A. J. Makower: copies only of testimonials, must be sent in before July 22, 1905, addressed to W. C. MACKENZIE, Esq., D.Sc., 5 The Crescent, Cromer, to whom

CHEMISTRY, J. B. Coleman, J. C. Crocker, and F. H. Lowe; candidates may apply for further information.

MATHEMATICS and PHYSICS, S. Skinner, W. H. Eccles, J. Lister and L. Lownds; BOTANY, H. B. Lacey and T. G. Hill;

GEOLOGY, A. J. Maslen. In the evenings similar Courses will be COUNTY COUNCIL OF THE

conducted, but at £2 per Session. Also TECHNICAL DAY

COURSES of three years' duration are arranged as a preparation for WEST RIDING OF YORKSHIRE.

the Engineering, Electrical and Chemical and Metallurgial pro

fessions. The Laboratories and Workshop are open for RESEARCH EDUCATION DEPARTMENT.

under the direction of The Principal and the Heads of Departments. SECONDARY SCHOOLS.

Further particulars may be obtained on application to The The West Riding Education Committee will require in September the SECRETARY, who will send the Calendar and Prospectus for 314.. or services of ONE ASSISTANT MASTER to teach principally Mathematics.

it may be obtained at the Office, price id. Salary, £150 per annum.

TWO ASSISTANT MISTRESSES to teach principally Science.
Salary, £120 each per annum.
ONE ASSISTANT MISTRESS to teach principally Mathematics and

SCHOOL,
Physical Exercises. Salary, 6120 per annum.
ONE ASSISTANT MISTRESS with special qualifications for pre-

PADDINGTON, W. paratory work. Salary, 6120 per annum.

The WINTER SESSION will begin on OCTOBER 2. ONE ASSISTANT MISTRESS to teach principally English and

The Medical School provides complete courses for the Medical Degrees Physical Exercises. Salary, Eroo per annum

of the Universities of London, Oxford, Cambridge and Durham for the Applications for these posts must be made on forms to be obtained from

Diplomas of M.R.C.S., L.R.C.P.; and for the Naval and Military the Education Department (Secondary), County Hall, Wakefield, where

Medical Services. they must be returned not later than Saturday, July 29, 1905. Copies of PRELIMINARY SCIENTIFIC (M.B.LOND.). -A complete course not more than three recent testimonials must be sent with the application.

of Chemistry, Physics and Biology, under recognised Teachers of the Canvassing will be a disqualification.

University, will begin on October 3.

SIX ENTRANCE SCHOLARSHIPS in Natural Science, value 4145 COUNTY COUNCIL OF THE

to £52 Ios., will be competed for in September.

Calendar and full particulars on application to the DEAN.
WEST RIDING OF YORKSHIRE.
EDUCATION DEPARTMENT.

THE GROCERS' COMPANY'S
HIGHER EDUCATION.

SCHOLARSHIPS. The West Riding Education Committee will require in September the With the object of encouraging original research in Sanitary Science, the services of TWO MASTERS (one qualified in Science and Mathematics, Grocers' Company offer TWU SCHOLARSHIPS, each of 1200 avear. and one in English and General Subjects) for the purpose of conduct with an allowance to meet the cost of apparatus and other expenses ia Courses of Instruction for Groups of Elementary Teachers and undertaking connection with the work, tenable for one year, but renewable for a second some teaching in Secondary Schools, at £200 each per annum.

or third year, subject to the conditions of the scheme under which they Applications for these posts must be made on forms to be obtained from are established. the Education Department (Secondary), County Hall, Wakefield, where The next Election will take place in May, 1906. they must be returned not later than Saturday, July 29, 1905. Copies of

Applications must be sent in before April i to the CLERK OF THE not more than three recent testimonials must be sent with the application.

GROCERS' COMPANY, Grocers' Hall, London, E.C., from whom a form of Canvassing will be a disqualification.

application and further information may be obtained. BIOLOGY.-Wanted, an Assistant to help

generally in Biological Laboratory on four afternoons and four eveni per week ; must be qualified to take Elementary Board of Education

MATRICULATION, INTERMEDIATE, FINAL. Class in Physiology. Salary, 6so, and free admission to other classes

PREPARATION by CORRESPONDENCE and ORAL TUITION in College.-Apply to PRINCIPAL, BIRKRECK COLLEGE, Breams Buildings, E.C.

on a THOROUGHLY INDIVIDUAL SYSTEM. Fees based on success.

The STAFF includes Graduates of Oxford, Cambridge, London, and BIRKBECK COLLEGE.

Royal Universities, Science Medallists, Prizemen, Scholars, &c. The Council invite applications for tbe appointment of ASSISTANT

SINGLE SUBJECTS TAKEN: Science, Mathematics, Logic, LECTURER in MATHEMATICS. Cominencing salary, 6175. to date

Psychology, Political Economy, Latin, Greek, French, German, &c. from September 15 next.

For terms, &c., address Mr, J. CHARLESTON, B.A. (Lond. and Oronha Applications, stating age, degrees and qualifications, teaching experi. Burlington Correspondence College, Clapham Common, Londo ence, and enclosing testimonials, must reach the PRINCIPAL not later than August 30. Birkbeck College, Breams Buildings, Chancery Lane, E.C.

For other Scholastic Advertisements, see pages cxiii ani cxix.

ST. MARY'S HOSPITAL MEDICAL

B.A. AND

B.Sc. EXAMS.

TRADE MARK

Brand

INDIAN FOREST SERVICE. THE SECRETARY OF STATE FOR INDIA IN COUNCIL gives notice that, in view of the late date at which the Regulations for the Appointment of Probationers to the Indian Forest Service were published this year, he has decided to modify them(a) by extending till Tuesday, August 1, the period within which appli.

cations wil be received ; (6) by admitting to the examination candidates who undertake to pass

Responsions or its equivalent before October next, failing which

their selection would be cancelled; (c) by permitting candidates to offer Zoology at their discretion.

Applications for admission to the examination must be made on a printed form to be obtained (with the revised Regulations) from the SECRETARY, Judicial and Public Department, India Office, Whitehall, London, S.W.

The age limits are 18 to 20 years on January 1, 1905.
Not less than 13 candidates will be selected, if fully qualified.
India Omnce,

A. GODLEY,
July 5, 1905.

Under Secretary of State.

BOROUGH POLYTECHNIC

INSTITUTE.

ENGINEERING DEPARTMENT. The Governors of this Institute will be prepared to receive applications from persons qualified to teach the following subjects in Evening Classes >

MECHANICAL ENGINEERING (City and Guilds of London Institute course). STEAM and HEAT ENGINES with Laboratory work.

JUNIOR ASSISTANT in ENGINEERING LABORATORY and in DRAWING OFFICES

INSTRUCTOR for ELECTRIC WIRING and FITTING.
For furtber particulars apply to

C. T. MILLIS, Principal. Borough Polytechnic Institute,

103 Borough Road, London, S.E.

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WRITE FOR BOOKLET GRATIS BURROUGHS WELLCOME AND CO.

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THE GLASGOW AND WEST OF SCOTLAND TECHNICAL COLLEGE.

The Governors invite applications for a post about to be created in the Administrative Department of the College. The principal duty of the officer appointer will be to secure the co-ordination of ibe work of the Continuation Classes in Mathematics, Engineering Drawing and Building Construction, conducted by the School Boards of Glasgow and Govan, with the College Evening Classes in the same subjects. His work in this connection will be under the supervision of a Joint Committee representing the School Boards and the College ; in regard to his other duties, he will be under the direction of the Governors of the College, and must place bis whole time at their disposal. Candidates must have a sound knowledge of two of the subjects named, as well as experience in teaching them. Salary not less than 6300 per annum. Applications must be sent to the SECRETARY, Technical College, Glasgow, on or before July 29.

COUNTY BOROUGH OF BURY.

MUNICIPAL TECIINICAL SCHOOL. WANTED, to begin duties on September 1, 1905, well qualified TEACHER of THEORETICAL and PRACTICAL PHYSICS, who will be required to give instruction to Pupil Teachers during the daytime for about iwelve hours a week, and (for about thirty weeks in the year) to students of the Evening Classes on five evenings a week.

Salary, 150 per annum.

Applications, stating age, qualifications, and teaching experience, should reach the undersigned not later than July 27, 1905.

ROBERT WILKINSON,

Director of Education, Education Offices, Bank Street, Bury,

July 14, 1905.

WANTED for WOLMER'S SCHOOL,

KINGSTON, JAMAICA, by September 12, 1905, an ASSISTANT MASI ER to iake charge of the Science Teaching (Physics and Chemistry) throughout the School, and to teach ordinary class , ubjects in addition, Salary, 150 (One Hundred and Fifty Puunds) per annum, non-resident. Passage money to Jamaica (£18) will be pa d, but must be refunded by tbe Master appointed if he resigns within twelve months; 612 to be refunded on resignation in the second year; 46 on resignation in the third year Medical certificate of healih required. Apply, stating scientific qualifications, subsidiary subjects, &c., and enclosing testimonials, to w. CowPER, M.A., Headmaster, Wolmer's School, Kingston, Jamaica. Applications made in response to this advertisement (those already made need not be repeated) should be posted not later than Thursday, July 27.

for about iwelus to give instruction and PRACTICAL Well qualified

urs a week, and for Pupil Teachers du"HYSICS, who

MASTERSHIPS VACANT FOR SEP.

TEMBER. - Physics, College in India, 6320, and passage ;
Mathematical, Public College, England, 6700 ; Several Science
Graduates, Public College, London University Teaching Centre, £150
to £300; Ditto, Matbematical, £150 to 6300; English, must be in
Honors, £150 to £175; English and French, £150 to 4175; 200
Vacancies for Senior, Junior, and Foreign.
ORELLANA & Co.

Send List to all Candidates,
80 WIGMORE STREET, LONDON, W.

COUNTY OF LONDON. JUNIOR ASSISTANT NATURALIST, HORNIMAN MUSEUM. * Applications are invited for the post of JUNIOR ASSISTANT to the Naturalist at the Horniman Museum, Forest Hill, S.E. Preference will be given to applicants who have made a practical study of some branch of Natural History, and have a general knowledge of Zoology. Importance will be attached to good handwriting, and an acquaintance with photo. graphic methods is desirable. Commencing wages, 155. a week. Appli. Cations in the candidate's own handwriting, with copies of not more than three testimonials, must be sent to the undersigned not later ihan 10 a.m. on July 28, 19o5.

G. L. GOMME, County Hall, Spring Gardens,

Clerk of the Council. July 20, 1905.

MUNICIPAL TECHNICAL SCHOOLS,

LIMERICK. A PRINCIPAL is required for the above Schools who would also undertake to teach Electricity in the evenings.

Salary, 1200 to £250, according to qualifications and experience of organising work.

Application to be sent before July 31 to THE SECRETARY, 69 George Street, Limerick.

To SCIENCE and MATHL. MASTERS.

REQUIRED (1) Master qualified to teach Theoretical and Practical Science, &c. Commencing salary, 6150, non-res. Secondary School near London. (2) Assistant Master for General Elementary Science. Degree not necessary. 22 hours' work a week. Technical Institute in Keot. 10 to 6160, non-res. (3) Two Masters required for Physics and Chemistry under Dept. of Agriculture and Technical Instruction, Aroo cach, resident. Grammar School. For particulars of the above and many other vacancies, address :-GRIFFITHS, SMITH, POWELL & SMITA, Tutorial Agents (Estd. 1833), 34 Bedford Street, Strand.

KENT EDUCATION COMMITTEE. TECHNICAL INSTITUTE, TUNBRIDGE WELLS.

Applications are invited for the post of ASSISTANT in the SCIENCE DEPARTMENT. Salary, £150. Apply to H. W. Cook, Principal.

For other Scholastic Advertisements, see tages cxii and cxiv,

By using ...

Service

THE SYTAM Bottle &Specimen Partette

HANDSWORTH EDUCATION

COMMITTEE.

TECHNICAL SCHOOL. WANTED for September next, an ASSISTANT SCIENCE MASTER for the Technical School. The person appointed to devote the whole of his time to the duties connected with the appointment. Chief subjects, Physics and Mathematics. Classes every evening and part day. Salary, £140 per annum.

For form of application and further particulars please send stamped addressed foolscap envelope to

THOMAS H. MOON, Secretary. Education Offices, Handsworth (Staffs.), July 18, 1905.

GUY'S HOSPITAL. PRELIMINARY SCIENTIFIC (M.B. London). The next Course of LECTURES and PRACTICAL CLASSES for this Examination will begin on October 2, Full particulars may be obtained on application to the DEAN, Guy's Hospital, London Bridge, S.E.

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