COUNTY OF LONDON.

1 The London County Council invites applications for the under-mentioned posts at the BEAUFOY INSTITUTE, KENNINGTON, S.E., which will probably be opened in September next as a Day Technical School for boys between 12 and 16 years of age, and an Evening Technical School for boys and girls :

1. HEAD MASTER. Salary, £20 a year, rising by four annual increments of £10 and four of 15 to £350 a year.

2. ASSISTANT MASTER qualified to teach either science and mathematics or English. Salary, £200 a year, rising by annual increments of £10 to a maximum of £250 a year.

The appointed candidates will be required to devote their whole time to the duties of the office to which they are appointed.

Applications should be made on Form T.17, to be obtained, together with particulars of the appointment, from the EDUCATION OFFICER, Education Offices, Victoria Embankment, W.C., to whom they must be returned not later than 11 a.m. on July 9, 1909, accompanied by copies of three testimonials of recent date, All communications on the subject must be endorsed T. and a stamped addressed foolscap envelope must be enclosed. Canvassing, either directly or indirectly, will be held to be a disqualification for employment.

Education Offices,

Victoria Embankment, W.C.,

June 29, 1909.

G. L. GOMME,

Clerk of the London County Council.

COUNTY BOROUGH of PORTSMOUTH.

MUNICIPAL COLLEGE.

SCIENCE MASTERS required in September, (a) for first-grade Public School, good degree and experience essential. Salary from £160; if able to take highest Mathematics not less than £200, increasing. D 19289. (b) For Endowed Secondary School, able also to teach Geography. Salary £150, non-res.; or res. with extra salary for house duties. D 19784. (c) For Endowed School, to teach Chemistry and Botany, 160, non. res. D 20260. (d) Physics Master required for Public School; Oxford or Cambridge Honours Degree essential. £110 to 120, res. D 19930. (e) To teach Mathematics and Science in Proprietary School; good Degree and experience essential. Salary up to £150, res. D 20063. MATHEMATICAL MASTERS required

in September, (a) for Public Secondary School; Mathematical Honour Degree and experience necessary. Non-res., £160. D 19370. (b) For High-class Preparatory School; res., up to £130. D 19850. (c) For Public School, Oxford or Cambridge Mathematical Honour Degree and experience. Res.. £130 to £150. D 19957. (d) Oxford or Cam bridge Mathematical Honour man for Public Secondary School. Res., up to £140, increasing. D 19879.

For further details of these and other vacancies apply, with particulars of qualifications, to Messrs. TRUMAN & KNIGHTLEY, Ltd. Educational Agents, Sheffield House, 158-162 Oxford Street, London, W

LIVERPOOL EDUCATION

on the staff of the Municipal College :

COMMITTEE.

The Committee invite applications for the post of INSTRUCTOR in MANUAL WORK at the LIVERPOOL COLLEGIATE SCHOOL. Candidates should have had workshop experience, and must be fully qualified to teach Mechanical Drawing and Wood-work. A preference will be given to those with teaching or workshop experience in metal-work as well as in wood-work.

For further particulars and forms of application apply to JAMES G. LEGGE, Director of Education, 14 Sir Thomas Street, Liverpool, with whom applications must be lodged not later than July 17, 1909.

EDWARD R. PICKMERE, Clerk to the Local Education Authority.

UNIVERSITY OF MANCHESTER

AND

MANCHESTER ROYAL INFIRMARY.

ENTRANCE MEDICAL SCHOLARSHIPS.

Two Scholarships are cffered and will be awarded to candidates who give evidence of a high standard of proficiency in Arts or Science respectively. Each Scholarship is of the value of £100, and the successful candidates will be required to enter for the full Medical Curriculum in the University and the Infirmary. Applications should be sent on or before

ASSISTANT MASTERS WANTED for Secondary Schools in Cairo and Alexandria, under the Ministry of Education. to teach (1) the English Language and English subjects, especially History, and (2) Science (Experimental Physics and Chemistry) respectively. To enter on duties October 1. About 5co boys in each school, mostly Mohammedans.

Candidates should not be less than 23 or over 30 years of age, should have a robust constitution, and have taken a University Degree with Honours. They must have experience as teachers. Preference will be given to appli. cants who hold a Diploma in Teaching. Appointment under contract. Salary, £E. 360 per annum. Length of engagement, two years. Allowance for passage out to Egypt and for return at close of contract. Teaching hours, on an average, four daily, Fridays only excepted. Summer vacation not less than two months.

Applications, with full statement of qualifications (school, college, class of degree, experience in teaching), and accompanied by copies only of testimonials, to be sent before July 10 to J. W. CROWFOOT, Esq, at Subdeanery, Lincoln, to whom candidates may apply for further information. COUNTY COUNCIL OF THE WEST RIDING OF YORKSHIRE.

EDUCATION DEPARTMENT.

ELLAND SECONDARY SCHOOL (GIRLS). The West Riding Education Committee will require for the above school or September next, the services of an ASSISTANT MISTRESS to take chiefly Science, Mathematics and Physical Geography (ability to teach Domestic Subjects will be an additional qualification). Commencing salary, £120 per annum.

Forms of application may be obtained from the Education Department (Secondary Branch), County Hall, Wakefield, and should be returned, with copies of not more than three recent testimonials, not later than July 19

COUNTY BOROUGH OF DUDLEY.

EDUCATION COMMITTEE.

PRINCIPAL of TECHNICAL SCHOOL and ORGANISER of EVENING SCHOOL WORK required. He must possess a Science Degree, have had experience in the kind of work desired, and devote his whole time to the duties. Salary, £200 to £250, according to qualifications and experience.

Applications (on forms to be obtained from the undersigned on receipt o a stamped addressed foolscap envelope) to be sent in not later than July 12, 1909, to J. M. WYNNE, Director of Education, Dudley.

SECONDARY SCHOOL OF THE MERCHANT VENTURERS' TECHNICAL COLLEGE, BRISTOL. TEMPORARY MATHEMATICAL MASTER for next Term only, £60 for the Term. Particulars and form of application obtainable by sending a stamped addressed foolscap envelope to the REGISTRAR.

Greece. Required, a Master to teach the English language and all branches concerning the study of Navigation. Salary, 14 a month, non-res. Good school. Address -GRIFFITHS, SMITH, POWELL AND SMITH, Tutorial Agents (Estd. 1833), 34 Bedford St., Strand.

To Science Masters.-Required in Septem

ber, Graduate to teach Botany, Chemistry, and Physics from an agricultural point of view. and Mathematics. Salary, 130 to £140, non-resident. Address-GRIFFITHS, SMITH, POWELL AND SMITH, Tutorial Agents (Estd. 1833), 34 Bedford St., Strand.

Board and Tuition for 1st B.Sc. Lond. or other Science Examination in return for help given in laboratory. Post suitable for boy just leaving school.-Apply by July 10 to HEADMASTER, Trent College, Derbyshire.

The Proprietors of the Patents Nos.:

10495 of 1904 for "Improved method of finding the direction of sound";

10477 of 1904 for "Improvements in apparatus for receiving submarine signals";

10463 of 1904 for "Improved means for producing sound vibrations in water applicable to marine signalling";

3266 of 1903 for "Improvements in apparatus for producing sound vibrations in water";

from a highly qualified chemist or chemical engineer, principally with a view to research in connection with their business. As the firm is operating an important new process of which only some portions are patented, preference will be given to an otherwise suitable applicant willing to invest a few thousand pounds capital in the undertaking after investigation. A Directorship might be available.-Apply, I. C., c/o ELDER. 17 Victoria Street, S.W.

WANTED: RADIUM.-Armbrecht, Nelson & Co., 71 and 73 Duke Street, Grosvenor Square, London, W. SECOND-HAND BOOKS at Half Prices!!

New Books at 25 per cent. Discount! Rooks in all branches of SCIENCE, TECHNICS, MATHEMATICS, and NATURAL HISTORY, and for all Examinations (Elementary and Advanced). Sent on approval. Catalogues free. State wants. Books bought; best prices given.-W. & G. FOVLE, 135 Charing Cross Road, London. TYPE-WRITING UNDERTAKEN BY HIGHLY EDUCATED WOMEN ACCUSTOMED TO SCIEN.

TIFIC MSS. (Classical Tripos, Intermediate Arts, Cambridge Higher Local). Modern Languages. Research, Revision, Translation, Shorthand. Dictation Room. The Cambridge Type-writing Agency, To Duke Street, Adelphi, W.C

mission of sound for submarine purposes and to apparatus therefor ";

13287 of 1902 for "Improvements relating to apparatus for the transmission of sound for submarine purposes";

18570 of 1906 for "Improvements in devices for producing sound signals in. water,"

are desirous of entering into arrangements by way of licence and otherwise on reasonable terms for the purpose of exploiting the same and ensuring their full development and practical working in this country. All communications should be addressed in the first instance to :

HASELTINE, LAKE & CO.,

Scrap, &c., valued or purchased.

SPINK & SON, Ltd.,

30 CORNHILL, E.C., & 17 & 18 PICCADILLY, LONDON, W.

ESTD. 1772.

Gems for experimental work at moderate prices.

HAND.

SECOND-HAND TELESCOPES ON STOCK. Dollond, £8 10s.; " Wray, £12 10s.; 3" Cooke, £22 10s. Cooke, £30: 3" Dollond (Student), £10; 31" Wray, £14; 34" Cooke, £25; and others. EYEPIECES from 7s. 6d. each. Prismatic Binoculars by every known Maker. Exchanges arranged. NEW PRISMATIC, 8X. £4 4s.: 12X, £6 6s.

BROADHURST, CLARKSON & CO., Manufacturing Opticians. 63 Farringdon Road, London, E.C. (30 years at 28 Bartlett's Bldgs.).

EVERY LABORATORY REQUIREMENT. Illustrated Catalogue of Apparatus, with Price List of Chemicals, free on application.

Telegraphic Address-"APPARATUS, MANCHESTER."

Telephone Number-2038.

NOTICE.

The Publishers of NATURE will be pleased to send on receipt of a postcard a list of the Steel and Photogravure Portraits contained in the "Scientific Worthies" series.

ST. MARTIN'S STREET, LONDON, W.C.

61 OLD COMPTON ST., SOHO, LONDON, W.

TYPEWRITERS

DENT'S ASTRONOMICAL CLOCKS, SIDEREAL OR MEAN TIME CLOCKS FOR OBSERVATORIES, £21 & UPWARDS. Nature says: "Should find its way into many observatories where an accurate instrument is required at a moderate cost. For the sum of £21 they supply a clock with a 10-inch dial, dead-beat escapement, and wooden rod seconds pendulum in a solid mahogany case and after examining the instrument we have no hesitation in pronouncing it a marvel of cheapness."

E. DENT & CO., Ltd., Watch, Clock, and Chronometer Makers By Special Appointment to H. M. the King. Makers of the Great Westminster Clock, Big Ben. Makers of the Standard Clock of the Royal Observatory, Greenwich, and the Principal Observatories throughout the World.

And 4 ROYAL EXCHANGE, LONDON. ¶ Grand Prizes and 1 Gold Medal, Franco-British Exhibition.

THE IRISH NATURALIST.

A Monthly Magazine of Irish Zoology, Botany, and Geology. Price 6d.

Edited by GEO. H. CARPENTER, R. Sc., R. LLOYD PRAFGER, B A., and ROBERT PAITERSON, F.L.S. Annual Subscription, 5s. Post Free to any Address. Dublin: EASON & SON, LTD., 40 Lower Sackville Street (to which Address Subscriptions should be sent).