Page images
PDF
EPUB

Send for our

NEW CATALOGUE (80 pp.)

of

MICROSCOPICAL SLIDES and ACCESSORIES

Just Issued.

See NATURE, May 17, page 63.

FLATTERS & GARNETT, Ltd.,

48 Deansgate,

Manchester.

RUBIDIUM, TANTALUM, GERMANIUM, CASIUM, BERYLLIUM, AND OTHERS,

in Gramme Tubes at Reasonable Prices.

NEW and Extended EDITION of TABLE of RARE ELEMENTS, giving full scientific particulars, 6d. post free. ARMBRECHT, Nelson & CO., Scientific Chemists, 71 & 73 Duke Street, Grosvenor Square, London, W.

Collections and Single Specimens of
British and Foreign

MINERALS, ROCKS, FOSSILS.

25 Specimens, 5/6; 50 do., 10/6; 100 do., 21/-; 200 do., 42/-. 20 Coal Measure Rocks and Fossils, 12/6; do., larger, 15/-. In Polished Deal Boxes. Inspection invited of a large stock of Minerals, Rocks, Fossils, and Microscopic Objects. Specimens sent on approval.

Cabinets, Geologists' Hammers, Card Trays, Glass-Capped Boxes, Models of Crystals, and other Apparatus for Geologists, &c. NEW CATALOGUES POST FREE.

THOMAS D. RUSSELL, 78 Newgate St., London, E.C.

NOTICE OF REMOVAL. JAMES R. GREGORY & Co.,

[blocks in formation]

WATKINS & DONCASTER,

Naturalists and Manufacturers of

CABINETS AND APPARATUS

FOR ENTOMOLOGY, BIRDS' EGGS AND SKINS, AND ALL
BRANCHES OF NATURAL HISTORY.

SPECIAL SHOW-ROOM FOR CABINETS.

N.B. For Excellence and Superiority of Cabinets and Apparatus, refer ences are permitted to distinguished patrons, Museums, Colleges, &c.

A LARGE STOCK OF INSECTS, BIRDS' EGGS AND SKINS. SPECIALITY.-Objects for Nature Study, Drawing Classes, &c.

Birds, Mammals, &c., Preserved and Mounted by First-class Workmen true to Nature. All Books and Publications on Natural History supplied. 36 STRAND, LONDON, W.C. (Five Doors from Charing Cross.)

CATALOGUE (102 pp.) POST FREE.

SAVAGE CURIOSITIES.
ETHNOGRAPHICAL SPECIMENS.

Stock of over 10,000 Specimens of Weapons, Implements, Ornaments,
Dress, Idols, Musical Instruments, &c., &c., used by all the Races of
Mankind, for sale at very low prices. All objects guaranteed genuine.
Trophies of genuine old Arms made for Billiard Rooms, Halls, &c.,
prices from 25s. ; also mounted Horns. -Catalogue of Ethnographical
Specimens illustrated with Bromide Photographs, 4d. monthly, 3s. 6d.
yearly. Collections Arranged and Catalogued. Specimens bought.
W. O. OLDMAN, 77 BRIXTON HILL, LONDON, S.W.

Minerals, Rocks, Fossils, Metallic Ores, Rough Precious Stones, &c.

A Large Assortment from all parts of the world always on view, and at all prices. Inspection invited.

Crude Mineral for Chemistry Students and Technical Schools. Single Crystals and Teaching Specimens in Great Variety. RICHARDS' SHOW ROOMS,

3 Beauchamp Place, Brompton Road, South Kensington, London, S.W.

LIVING SPECIMENS FOR

THE MICROSCOPE.

Helix

Volvox, Spirogyra, Desmids, Diatoms, Amoeba, Arcella, Actinosphærium, Vorticella, Stentor, Hydra, Floscularia, Stephanoceros, Melicerta, and many other specimens of Pond Life. Price 15. per Tube, Post Free. pomatia, Astacus, Amphioxus, Rana, Anodon, &c., for Dissection purposes. THOMAS BOLTON,

25 BALSALL HEATH ROAD, BIRMINGHAM.

MARINE BIOLOGICAL ASSOCIATION
OF THE UNITED KINGDOM.
THE LABORATORY, PLYMOUTH.
The following animals can always be supplied, either living
or preserved by the best methods :-

Sycon; Clava, Obelia, Sertularia; Actinia, Tealia, Caryophyllia, Alcy-
onium; Hormiphora (preserved); Leptoplana; Lineus, Amphiporus,
Nereis, Aphrodite, Arenicola, Lanice, Terebella; Lepas, Balanus,
Gammarus, Ligia Mysis, Nebalia, Carcinus; Patella, Buccinum, Eledone,
Pectens Bugula, Crisia, Pedicellina, Holothuria, Asterias, Echinus,
Ascidia, Salpa (preserved), Scyllium, Raia, &c., &c.
For prices and more detailed lists apply to
Biological Laboratory, Plymouth.

THE DIRECTOR.

NOTICE.-Advertisements and business letters for NATURE should be addressed to the Publishers; Editorial Communications to the Editor. The telegraphic address of NATURE is "PHUSIS," LONDON.

[merged small][merged small][merged small][ocr errors][merged small][merged small][ocr errors][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small]

CHARGES FOR ADVERTISEMENTS.

[blocks in formation]

£ s. d.

*Three Lines in Column.

[ocr errors]
[ocr errors][merged small][merged small]

Per Line after.

[blocks in formation]
[ocr errors][merged small][merged small][merged small]

One Sixteenth Page, or Eighth Col. 10 o
One Eighth Page, or Quarter
Column

6 Quarter Page, or Half a Column Half a Page, or a Column 3 5 O 66 O 18 6 Whole Page.

[ocr errors]
[ocr errors]

I 15

[ocr errors]

* The first line being in heavy type is charged for as Two Lines.

Cheques and Money Orders payable to MACMILLAN & CO., Limited. OFFICE ST. MARTIN'S STREET, LONDON, W.C.

[blocks in formation]

The "INCANDANODE" TUBE

(so called because it works all day with the Anode RED HOT). This Tube ran from 9 a.m. to 6 p.m. for five days at the Leicester meeting of the B. M. A. last July, The Anode was incandescent the whole time, but the Vacuum was fully maintained. One Tube will last for years. The Vacuum is easily adjustable.

THE BELOT SHIELD FOR X-RAY

WORKERS.

MR. HALL EDWARDS (at the Leicester meeting of the B. M. A. last July) said of this shield: "It is a scientific instrument designed on scientific lines, and overcomes all the objections which exist in the shields previously brought to my notice." THE

MEDICAL SUPPLY

ASSOCIATION,

228 GRAY'S INN ROAD, LONDON, W.C. Descriptive Circulars (with expert testimony) on application.

[merged small][graphic][merged small][merged small][merged small]

SPINTHARISCOPES.

(As devised by Sir WM. CROOKES.)

Showing the Scintillations of Radium. Fitted with powerful Lens, and contained in neat Leather Case.
Price 15- Post Free anywhere.

The scintillations seen in this instrument are from Pure Radium Bromide of the highest known activity, and are brighter and more plentiful than those produced from Pitchblende or any other radio-active substance.

See letter from Prof. Gotch on "The Spinthariscope and Retinal Excitability" (NATURE, June 22, 1905, page 174), setting forth a valuable scientific application of the instrument.

[graphic]

Calcium Metal

[ocr errors]

(15/- per ib.
11/3 per oz.

Thorianite
4/- per oz.
Radium Bromide from £16 per 5 mgs.

A. C. COSSOR, 54 Farringdon Road,

Telephone No. 10547 Central.

THE

LONDON, E.C.

Awarded Gold and

Silver Medals at
St. Louis Exhibition.

STIGMATIC LENS.

BRITISH

SERIES II. F/6.

[graphic]
[blocks in formation]

Is the best All-round Lens for either Professional or Amateur use.
Each lens will give perfect definition with full aperture to the extreme corners of the plate
it is sold to cover; with smaller stops it will cover at least two sizes larger, giving perfect sharp-
ness all over the plate, and thus becoming a wide-angle lens of the highest excellence. Either
combination may be used separately, giving foci of about 1 and 2 times the length of that of
the lens when used intact. The advantage of thus being able to choose the best point of view,
irrespective of distance, will be at once apparent to the artistic worker.

EQUIVALENT TO FOUR LENSES AT THE PRICE OF ONE.
Eleven Sizes are now ready, from 3 to 18 inches eq. focus.
CATALOGUE OF HIGH-CLASS CAMERAS AND LENSES, POST FREE.

J. H. DALLMEYER, Ltd., 25 NEWMAN ST., OXFORD ST., LONDON, W.

Frinted by RICHARD CLAY AND SONS, LIMITED, at

MAKERS OF THE CELEBRATED DALLMEYER LENSES.

& Lead Street Hil, Queen Victoria Slicet, in in: Cit. of Load by MA a AND CO., LIMITED, at St. Martin's Street, London. W.C., and THL MACMILLAN COMPANY, CC Fitta Avenue. New 1r.-IHURSDAY, July 19, 19-6

[graphic]
[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][graphic][graphic][subsumed][merged small][merged small][merged small][merged small][merged small][merged small][merged small]

JOHN J. GRIFFIN & SONS, Ltd.,

CHEMICAL AND PHYSICAL BENCH, illustrated above, as supplied
to National Physical Laboratory, Teddington, fitted for Gas, Water
and Electricity.

Catalogue of Chemical and Physical Apparatus, 350 pp. and 1200
Illustrations, free on application.

DESIGNS OF BENCHES AND FITTINGS TO SUIT ALL REQUIREMENTS.
14 COMMERCIAL STREET, LEEDS.

NEGRETTI & ZAMBRA'S

3000

4000

27

26

2000

TI

28

1000

29 30

RAIN

CHANGE

Compensated

FAIR

NEGRETTI & ZAMBRA

ONDON

26139

500

25

24

31

21

ANEROID

BAROMETERS.

NEW ILLUSTRATED AND

23

22

9000

[blocks in formation]

KINGSWAY, LONDON.

6000

7000

8000

Branches

45 Cornhill;
122 Regent Stree.

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][ocr errors][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][ocr errors][ocr errors][ocr errors][merged small][ocr errors][merged small]

SOUTH-WESTERN POLYTECHNIC,

MANRESA ROAD, CHELSEA, S. W.

The Day College Courses consist of 30 hours per week, and are in prepar ation for London University degrees of B.Sc. in Mechanical and Electrical Engineering, in Chemistry, Physics and Natural Science. Session Fee, £15 The Evening Classes consist of similar courses at much reduced rates. The Technical Day Courses are arranged to extend over 3 years and prepare for Engineering, Electrical, Chemical and Metallurgical professions. S. SKINNER, M.A. *W. H. ECCLES, D.Sc. J. LISTER, A. R.C.S. *L. LOWNDS, B.Sc., Ph.D. J. B. COLEMAN, A.R.C.S. J. C. CROCKER, M.A. F. H. Lowe, B.Sc. C. W. HALE.

Mathematics and Physics

Chemistry and Metallurgy

Botany Geology

[ocr errors][merged small]
[blocks in formation]

PADDINGTON, W.

(UNIVERSITY OF LONDON.)

The WINTER SESSION will begin on OCTOBER 1.

The Medical School provides complete courses for the Medical Degrees of the Universities of London, Oxford, Cambridge, and Durham; for the Diplomas of M.R.C.S., L.R.C. P.; and for the Naval and Military Medical Services.

PRELIMINARY SCIENTIFIC (M. B. Lond.).—A complete Course of Chemistry, Physics, and Biology, under Recognised Teachers of the University, will begin on October 2.

SIX ENTRANCE SCHOLARSHIPS in Natural Science, value £145 to £52 10s., will be competed for on September 24-26. Calendar and full particulars on application to the DEAN.

COACHING (THEORY AND

PRACTICE)

[blocks in formation]

Applications for the above appointment Divisional Offices, 2 Greenwich Road, S.E.

County Electoral Area

and School. CLAPHAM: Wix's Lane.

Dept.

B.

Status.

ASST. MASTER, to teach Practical Science.

to be sent to Mr. W. Buck,

Status.

ASST. MASTER. qualified to take charge of laboratory and to teach all stages of Physics and Chemistry.

Mechanical Engineering

Electrical Engineering ...

*A. J. MASLEN, F.L.S.

W. W. F. PULLEN, Wh.Sc.
A. MACKLOW SMITH.
H. AUGHTIE.

A. J. MAKOWER, B.A.
U. A. OSCHWALD, B.A.
*B. H. MORPHY.

* Recognised Teacher of the University of London. Full prospectus from the SECRETARY, post free, 4d.: at the office, price 1d.

ARMSTRONG COLLEGE,

NEWCASTLE-UPON-TYNE,

(IN THE UNIVErsity of DURHAM.)

The Council invite applications for the post of LECTURER in MECHANICAL ENGINEERING. Stipend, £300 per annum. Candi. dates must send in six copies of their application and testimonials not later than September 20, 1906, to the undersigned, from whom further particulars may be obtained.

F. H. PRUEN, Secretary.

Applications for the above appointment to be sent to Mr. W. I. RODGERS, Divisional Offices, Stockwell Road, S. W.

Candidates, other than successful candidates, invited to attend the Managers' meeting, will be allowed third-class return railway fare, but no other expenses.

Canvassing, either directly or indirectly, will be considered a disqualifi

cation.

Education Offices,

Victoria Embankment, W. C.

G. L. GOMME,
Clerk of the London County Council.

For other Scholastic Advertisements, see page cxi.

[blocks in formation]

It is to be distinctly understood that the appointment gives no claim to pension or indemnity.

The Government reserves to itself the right to dismiss the assistant for misconduct or incapacity.

In the Government Schools, as in all State Administrations in Egypt, Sunday is a working day. The Schools are closed on Fridays.

Leave will be granted on the same terms as to other Government Officials. The possibility of taking leave, and the period of the year at which it is granted, depend upon the exigencies of the service

Pay commences from date of arrival in Cairo. On taking up his duties in Cairo, the Assistant will receive one month's pay in lieu of passage money. All applicants should attach a certificate from a legally qualified medical man, stating that in his opinion the candidate would pass as a first-class life for insurance purposes.

All applicants should state:

Their training and qualifications in Analytical Chemistry, Their age,

What foreign languages they know, and

If they can be in Cairo by October 1.

The latest mail by which applications may be posted will leave London on Friday, August 31. Applications to be addressed :-THE DIrector, Government School of Medicine, Cairo, Egypt.

THE GOVERNMENT

OF

CEYLON

[blocks in formation]

TO SCIENCE AND MATHEMATICAL MASTERS.-September Vacancies.-Graduates in Science other well qualified Masters seeking posts in Public and other Schools should apply at once, giving full details as to qualifications, &c., to Messrs. GRIFFITHS, SMITH, POWELL & SMITH, Tutorial Agents (Estd. 1833), 34 Bedford Street, Strand, London. Immediate notice of all the best vacancies will be sent.

require a LECTURER in PHYSICS and a LECTURER in CHEMISTRY for the Colombo Medical and Technical Colleges. Salary for each post, £400, rising by annual increments of £25 to £500

a year

The Government also require a SCIENCE MASTER for the Royal College, Colombo, to teach Chemistry and Physics for London University Pass Examinations, including the Intermediate B.Sc. Salary, £350, rising to £450 by annual increments of £25.

For the above appointments preference will be given to graduates in
honours of any British University, under the age of 35.

Salaries are subject to a deduction of 4 per cent. as contribution to the
Widows' and Orphans' Pension Fund.

Free passages to the Colony. Leave and pension on same terms as to
other officers of the permanent service.
Applications should be sent before August 15 to the ASSISTANT PRIVATE
SECRETARY, Colonial Office, S. W., and envelopes should be marked
with the name of the post applied for. Copies only of testimonials
(not more than six).

DARTFORD TECHNICAL

INSTITUTE.

CHEMICAL DEPARTMENT.
EVENING CLASSES.

The Committee invite applications for the post of TEACHER of
CHEMISTRY (Theoretical and Practical), who may be required to give
instruction on four evenings per week for about three hours per evening.
Salary, £90 per Winter Session of about 30 weeks.

Applications should be forwarded not later than August 11 to Mr. D. F. BROW, Technical Institute, Dartford, Kent, from whom further particulars may be obtained.

UNIVERSITY OF BIRMINGHAM.

LECTURER IN ZOOLOGY.

The Council invites applications for the appointment of LECTURER in ZOOLOGY.

Stipend, £150 per annum.

Particulars and conditions of the appointment may be obtained on application to the SECRETARY.

Applications, giving particulars as to qualifications and experience, with six copies of recent testimonials, must be sent to the SECRETARY on or before July 31, 1906.

UNIVERSITY

GEO. H. MORLEY, Secretary.

COLLEGE OF SOUTH

WALES AND MONMOUTHSHIRE,

CARDIFF.

The Council of the College invites applications for the post of DEMONSTRATOR and ASSISTANT LECTURER in BOTANY. Further particulars may be obtained from the undersigned, by whom applications with testimonials (which need not be printed) must be received on or before Saturday, September 1, 1906.

J. AUSTIN JENKINS, B.A, Registrar.

University College, Cardiff, July 17, 1906.

HARPER-ADAMS

AGRICULTURAL

COLLEGE.

NEWPORT, SALOP.

LECTURER IN MATHEMATICS AND LAND-SURVEYING. Applications are invited for the above Lectureship on or before August 12. The Lecturer will be required to enter upon his duties on October 1, 1906. Full particulars can be obtained on application to the PRINCIPAL.

Salaries £400 to £500, £350 to £450, and

£300 to £400. 20 Science Graduates for Public Colleges, England and Abroad. Also Woodwork vacancy, £150. List of Science and Mathematical Vacancies sent to all Candidates.

ORELLANA

co.

can guarantee each candidate with good references an appointment. No fee till suited.

ESTD. OVER 50 YEARS.

80 WIGMORE STREET, LONDON, W.

COACHING.-Gentleman with London University diplomas in Applied Science wishes to coach gentlemen reading for examinations in mathematics, electrical and mechanical engineering, and allied subjects, at their own residence or place agreed upon. Apply by letter to "EQUATION," c/o Smith's News Agency, Worcester

Experienced Lecturer, young, tall, wishes for engagement round Birmingham or Worcester for the following subjects:-Mathematics, Electrical Engineering, and Applied Physics. Apply by letter to EQUATION,' c/o Smith's News Agency,

Worcester.

For other Scholastic Advertisements, see page cx.

For Sale, a unique Collection of Minerals, some 300 specimens, and catalogue. Can be seen by appointment.— Address W. TRURAN, 163 Richmond Road, Dalston, London, N.E.

PROTECTION from MOSQUITOES

AND OTHER INSECTS.

ARMBRECHT'S PYRETHRUM.

Ten drops to a tablespoonful of water and sponged over exposed-
parts prevents insects from biting for about Te

2s. 9d. a Bottle post free inland; Ss. 9d. to all
ARMBRECHT, NELSON & CO. S
71 & 73 DUKE street, grosvenor squ

« PreviousContinue »