COUNTY BOROUGH OF WEST HAM. WEST HAM MUNICIPAL TECHNICAL INSTITUTE, ROMFORD ROAD, STRATFORD, E.

COLLEGE OF SCIENCE AND ENGINEERING. Full Day or Evening Courses of Preparation under recognised Teachers of the University of London for the degree of B.Sc. in Science, or in Civil, Mechanical or Electrical Engineering. Also Course for Matriculation, and "Technical" Courses in Architecture, Surveying, Art, &c. Further particulars may be obtained from the PRINCIPAL.

Day Courses commence September 30.
Evening Classes commence September 27.
September 18, 1909.

FRED. E. HILLEARY, Town Clerk.

THE UNIVERSITY OF SHEFFIELD.
Courses are held and Degrees are awarded in the following Faculties:-
ARTS, PURE SCIENCE, MEDICINE, LAW, APPLIED
SCIENCE (including Engineering, Metallurgy and Mining).
ALL COURSES ARE OPEN TO MEN & WOMEN STUDENTS
ALIKE.

The SESSION 1909-10 commences OCTOBER 6, 1909.
Prospectuses giving full information may be obtained free from

W. M. GIBBONS, Registrar.

AERIAL NAVIGATION.-Mr. Eric Stuart BRUCE, M.A., Oxon., F.R.Met. Soc., Member of Council and late Honorary Secretary Aeronautical Society of Great Britain, VicePresident Aerial League of the British Empire, Membre d'Honneur Aéro Club of France, can accept engagements for his eminently successful lecture, "AIRSHIPS, BALLOONS, AND FLYING MACHINES," profusely illustrated by elaborate experiments and working models, also for shorter demonstrations at Soirées, Exhibitions, &c. Now booking for Winter Season. For prospectus, terms, &c., address E. S. BRUCE, Esq., Airth, Sunningdale, Ascot.

UNIVERSITY OF MANCHESTER.

A Platt Biological Scholarship of the value of £50 is offered for award. The Scholarship is open to persons who have studied Zoology or Botany in any University or College Laboratory, and the successful candidate will be required to devote himself to research in the Zoological or Botanical Laboratory of the University during the tenure of the Scholarship. Applications should be sent on or before October 15 to the REGISTRAR, from whom further particulars may be obtained.

For other Official Advertisements, see pages clxxxiv and clxxxvi.

THE JOURNAL OF ECONOMIC BIOLOGY.

Edited by

WALTER E. COLLINGE, M.Sc., F.L.S., F.E.S., with the co-operation of

Prof. A. H. REGINALD BULLER, D.Sc., Ph.D.; Prof. GEO. H. CARPENTER, B.Sc., M. R.I.A.; Prof. PERCY GROOM, M.A. (Cantab. & Oxon.), D.Sc., F.L.S.; ROBERT NEWSTEAD, M.Sc., A.L.S.;

and A. E. SHIPLEY, M.A., Hon. D.Sc., F.R.S.

Vol. IV., Part 4, now ready.
CONTENTS:-

On the Relation of Certain Cestode and Nematode Parasites to Bacterial Disease. (With Fig.) By A. E. SHIPLEY, M.A., Hon. D.Sc., F.R.S.Note on the Biology of Pestalozzia hartigii, Tubeuf. (With Plt. vii.) By CECIL E. C. FISCHER.-The Breeding of the Common Housefly during the Winter Months. By F. P. JEPSON, B.A., F.E.S.-The Role of Collembola in Economic Entomology. (With Fig.) By WALTER E. COLLINGE, M.Sc., F.L.S.-Notes on Some Collembola new to Britain. By WALTER E. COLLINGE, M.Sc., F.L.S., and JOHN W. SHOEBOTHAM.-On the Anatomy and Life-history of Rhabditis brassicae, n.sp. (With Plt. viii.) By ROWLAND SOUTHERN, B.Sc.-Note on the Infestation of a Coccid by Chalcid Parasites. By E. ERNEST GREEN.-Reviews.-Current Literature.

Prepaid Annual Subscription to Vol. IV. (4 parts), 16s.

The

INDIA OFFICE, WHITEHALL, S.W. September 24, 1909. Wanted, TWO ZOOLOGISTS, one of whom must be an entomologist, as Assistant Superintendents in the Indian Museum, Calcutta. salary of the posts is Rs. 500 a month, increasing by biennial increments of Rs 40 to Rs.700 a month. The candidate chosen as Senior Assistant Superintendent will be given free quarters, and will be eligible, at the discretion of the Trustees, for a personal allowance of Rs.200 a month in addition to his salary. Applications should be submitted on forms that will be supplied on reference to the UNDER SECRETARY OF STATE, India Office, Whitehall, London, S.W., not later than November 1, 1909.

COUNTY COUNCIL OF THE WEST RIDING OF YORKSHIRE. KNARESBOROUGH RURAL SECONDARY SCHOOL. Applications are invited for the post of ASSISTANT MASTER at the above-named school to begin work as early as possible.

The curriculum is that of an ordinary Secondary School for boys and girls specially adapted to rural conditions.

Candidates should have been trained for the teaching profession, and should possess strong qualifications in Art. They should also be able to teach Arithmetic on modern and practical lines, in addition to English subjects.

Commencing salary, £110 to £120, according to qualifications.

Forms of application may be obtained from Mr. A. V. HOUGHTON, Education Department (Secondary Branch), County Hall, Wakefield, and must be completed and returned so as to arrive not later than 9 a.m. on October 7, accompanied by not more than three recent testimonials.

LEICESTERSHIRE COUNTY

COUNCIL.

EDUCATION COMMITTEE.

COUNTY GRAMMAR SCHOOL OF KING EDWARD

VII., MELTON MOWBRAY.

FOR SALE.

A MAHOGANY-BODIED REFLECTING POLARISCOPE, with accessories, as tourmaline, &c.; can be converted into a powerful oxy-hydrogen microscope. There are 18 choice Selenite Slides by DARKER, also a genuine Miner's Fire Wheel. The advertiser knows only of three others-one at the Royal Institution. one at South Kensington, and one at the School of Mines. An original box of Premetheans; there are about 80 matches. The advertiser thinks this is the only box existing. A FLETCHER'S Compound Blowpipe; the catalogue price is 60s. Also DENT'S Dipleidescope, and an old Tinderbox. The advertiser will be glad to receive an offer for the above apparatus, considered as one lot. He is too old (93) to enter into any correspondence, but the instruments can be seen at MONTPELIER, GREENWAY LANE, BATH, the residence of J. D. COGAN.

ESTABLISHMENT OF BIOLOGY AND CEOLOGY. Projected for the supply of

Scientific Material of High Quality and Reasonable Price. SKELETONS and MICRO-OBJECTS

A SPECIALITY.

Petrological Micro-Slides, 12s. per assorted dozen. Enquiries are invited, and should be addressed to

The DIRECTOR, 34 Kitchener Road, Strood, Kent. MINERALOGY in a NUTSHELL. Carefully selected fragments of all Crystallized and Crystalline Minerals most suitable for the Microscope at 3d. each.

Lists free from G. H. RICHARDS, Mineralogist, &c. All kinds of British and Foreign Minerals. Show Rooms-3 Beauchamp Place, Brompton Rd., London, S.W. TYPE-WRITING UNDERTAKEN BY

HIGHLY EDUCATED WOMEN ACCUSTOMED TO SCIENTIFIC MSS. (Classical Tripos, Intermediate Arts, Cambridge Higher Local). Modern Languages. Research, Revision, Translation, Shortband. Dictation Room. The Cambridge Type-writing Agency, To Duke Street, Adelphi, W.C.

the above school, which will be opened in January next. Accommodation about 175 (Boys and Girls). Salary, £350 per annum. Copies of the Articles of Government may be obtained (orice One Shilling each) from the undersigned, to whom applications for the vacant post should be sent not later than October 31.

W. A. BROCKINGTON, Director of Education.

Typists. Perfect accuracy. 1od. per thousand words. Testimonials duplicated from 3s. per hundred copies. General typing.-The West LONDON TYPEwriting BureAU, 30 Rivercourt Road, London, W.

SUCCESSFUL INVENTORS

HAVE THEIR IDEAS WORKED OUT AND MODELS MADE AT Wm. K-L. DICKSON'S (Late with EDISON 1881-1896)

SCIENTIFIC & MECHANICAL LABORATORIES, 4 Denman Street, Piccadilly Circus, London, W. Telephone: GERRARD 4562. Telegrams: "LAURIONITE, LONDON."

OLD PLATINUM, GOLD

Scrap, &c., valued or purchased.

SPINK & SON, Ltd.,

17 & 18 PICCADILLY, W., and at

6 KING STREET, ST. JAMES', LONDON, S.W.
ESTD. 1772.

Gems for experimental work at moderate prices.