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ETHNOGRAPHICAL COLLECTION AND ART CURIOS.
MONDAY and TUESDAY, NOVEMBER 14 and 15, the FIRST
Prompt Payment of Claims.
SPECIAL SHOW-ROOM FOR CABINETS.
Dr Our Catalogue (96 pp.) Post free on application.
true to Nature.
(Five Doors from Charing Cross.)
BIRK BECK BANK
ROCKS, MINERALS, FOSSILS. ESTABLISHED 1851.
For Collectors, Students, Technical Schools, Colleges, &c. Current Accounts. 2% Interest allowed on minimum monthly balances when not drawn below £100.
COLLECTIONS IN POLISHED DEAL BOXES.
25 Specimens, 5/6; 50 do., 10/6; 100 do., 21/-; 200 do., 42/Deposits. 21' Interest allowed on Deposit Accounts.
20 Coal Measure Rocks and Fossils, 12/6; do., larger, 15/-. Advances made. Stocks and Shares bought and sold.
Adapted for the Board of Education Examinations in Apply C. F. RAVENSCROFT, Secretary,
Geology, Physiography, and Mineralogy.
A large stock of Minerals, Rocks, Fossils and Microscopic Objects for
selection. 'Specimens sent on approval. TO SCIENCE LECTURERS.
Cabinets, Geologists' Hammers, Chisels, Card Trays, Glass-capped
Boxes, Models of Crystals, &c., &c.
NEW CATALOGUE POST FREE.
THOMAS D. RUSSELL, 78 Newgate St., London, E.C.
LIVING SPECIMENS FOR &c. Miniature Triple Lantern constructed for B. J. MALDEN, Esq. ; great tore. New Oxybydrogen Microscope. Science Lanterns for Class De.
THE MICROSCOPE. sonstration Magnińcent
Results. Docwra Triple, Prize Medals, Highest Award Supplied to the Royal Polytechnic Institution, Dr. H. GRATTAN
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Lanterns. The Universal Lasten --inch Condensers, 4-wick Lamp, Portrait Combination front
Vorticella, Stentor, Hydra, Floscularia, Stephanoceros, Melicerta, and many
other specimens of Pond Life. Price is. per Tube, Post Free. Helix Less, 185. 6d. Marvellous value. Science Lecture Sets. Novelties.
pomatia, Astacus, Amphioxus, Rana, Anodon, &c., for Dissection purposes. Ite Lantern Kaleidoscope. Cheapest Lantern Outfits in the World. Crandly Mastrated Catalogue, over 180 choice Engravings, 6d. ;
THOMAS BOLTON, Patage, ud. Small Illustrated Catalogue, 100 pages, free, 5d. List of 0,000 Slides and 300 Lecture Sets, Science Subjects, Views, &c., 6d.;
25 BALSALL HEATH ROAD, BIRMINGHAM. Postage, ad Pamphlets Free. W. C. HUGHES, SPECIALIST, Brewster House, 82 Mortimer Road, Kingsland. N.
MARINE BIOLOGICAL ASSOCIATION
OF THE UNITED KINGDOM. Kinerals, Rocks, Fossils, Metallic Ores, Rough Precious Stones, &c.
THE LABORATORY, PLYMOUTH. Collections of above for Prospectors, Mining Engineers, The following animals can always be supplied, either living Technical Schools, and for Private Study.
or preserved by the best methods :RADIUM, PITCHBLENDE, &c. Sycon ; Clava, Obelia, Sertularia ; Actinia, Tealia, Caryophyllia, AlcyROCK SECTIONS.
onium; Hormiphora (preserved); Leptoplana; Lineus, Ampbiporu:,
Nereis, Aphrodite, Arenicola, Lanice, Terebella ; Lepas, Balanus, ALL LISTS FREE OF
Gammarus, Ligia Mysis, Nebalia, Carcinus; Patella, Buccinum, Eledone, JAMES R. GREGORY & CO.,
Pectens Bugula, Crisia, Pedicellina, Holothuria, Asterias, Echious.
Ascidia, Salpa (preserved), Scyllium, Raia, &c., &c.
For prices and more detailed lists apply to
Biological Laboratory, Plymouth.
THE DIRECTOR. Omco and stores :1 KELSO PLACE, STANFORD RD., KENSINGTON, W. ALBERT EDWARD JAMRACH TYPE-WRITING UNDERTAKEN BY
(Late CHARLES JAMRACH), HIGHLY EDUCATED WOMEN ACCUSTOMED TO SCIEN
180 ST. GEORGE STREET EAST. Revaian, Translation. Scale of charges on application. The Cam- Implements of Savage Warfare, Idols, Sacred Masks, Peruvian Pottery, brudge Type-writing Agency, 10 Duke Street, Adelphi W.C.
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ESTABLISHED 1798 (over A CENTURY). RETAIL-89 BISHOPSCATE STREET WITHIN, E.C. WHOLESALE—34 CAMOMILE STREET. EC
Scientific Apparatus Manufacturers and Laboratory Outfitters to the Home and Colonial Departments of H.M. Governwent, Scientific Institutions, Colleges, and the various Industries throughout the World.
including several new forms for LABORATORY PURPOSES. POST FREE ON APPLICATION.
NATURE says :-" add to the comfort and cleanliness of many operations in laboratories as well as in houses. The adaptability of the electric current, and the efficiency of the various forms of apparatus described in Messrs. Isenthal's catalogue, should encourage the use of electric energy as a source of heat.” (See issue of September 22, 1904, page 511.)
PURE BROMIDE OF RADIUM
Exact determination of temperature.
3 secs.). Can be used by any intelligent workman. One instrument suffices for several furnaces.
OF HIGH ACTIVITY.
Radium of the maximum activity, Wireless Telegraphy and other apparatus may be had on hire for Conversaziones, &c.
ISENTHAL & CO.,
85 MORTIMER STREET, LONDON, W. Contractors to the Admiralty, War, India, and Colonial Offices, &c.
May be obtained from TOWNSON & MERCER,
34 CAMOMILE STREET, E.C.
THE STEREOSCOPIC COMPANY'S
CARBONIC ACID IN AIR. ARTIST'S
PRICE, in Mahogany
Cabinet complete, £3: 3:0
The finest possible instrument for all practical .. purposes, embodying every scientific requirement.
This is a small portable apparatus designed by Dr. J. S. HALDANE, F.R.S., for the use of Medical Officers of Health, &c. A sample of air can, by means of this apparatus, be tested on the spot, the whole operation being quite simple.
See Commendatory Notice in “NATURE,”
August 13th, 1903, page 347.
The Ideal Camera for BIRD PHOTOGRAPHY, NATURAL
HISTORY SUBJECTS, PORTRAIT AND FIGURE STUDIES, ARCHITECTURAL & GENERAL WORK.
Write for full particulars from ... THE LONDON STEREOSCOPIC COMPANY, 106 & 108 REGENT ST., W., or 54 CHEAPSIDE, E.C.
ESTABLISHED OVER 60 YEARS.
C. E. MÜLLER, ORME & CO., Ltd.,
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A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE
To the solid ground
[PRICE 15 CENTS.
No. 1828, VOL. 71] THURSDAY, NOVEMBER 10, 1904.
(All Rights are Reserved.
CITY OF LONDON COLLEGE.
EAST LONDON TECHNICAL BIRKBECK COLLEGE COLLEGE,
BREAMS BUILDINGS CHANCERY LANE, EC.
FACULTY OF SCIENCE.
DAY AND EVENING COURSES.
ST. E. MACKENZIE, Ph.D., D.SC
H. WREN, Ph.D., B.A., B.Sc. Chemistry... J. T. Hewitt, D.Sc., and
(Albert GRIFFITHS, D.Sc. 1 C. SMITH, D.Sc. Physics ...
D. OWEN, B.A., B.Sc.
B. W. CLACK, B.Sc.
E. H. SMART, M.A.
1 W. G. Birt, B.A., B.Sc.
SA. B. RendLE, M.A., D.Sc.
F. E. FRITSCH, Ph.D., B.Sc. The DAY CLASSES for students over 16 years of age include full three Zoology...
H. W. UNTHANK, B.A., B.Sc years' technical courses in Chemistry and Engineering, and three years' Geology & Mineralogy Geo. F. HARRIS, F.G.S. courses for London University Degrees (Pass and Honours).
Assaying, Metallurgy & Mining. Geo. PATCHIN, A.R.S.M EVENING CLASSES are held in Advanced Technical and Scientific RESEARCH in Chemistry and Physics in well-equipped laboratories subjects, and for London University Degrees. Valuable SCHOLARSHIPS are awarded by the Drapers' Company in
French, German, Spanish, Russian, Dutch, & Italian Classes connection with the Day Classes.
EVENING CLASSES also in Biology, Physiology, Practical Geometry CALENDAR with full particulars post free, 4fd.
Building and Machine Construction, Steam, Theoretical and Applied J. L. S. HATTON, Director of Studies.
Mechanics, Land and Quantity Surveying, and Estimating.
Calendar 6d. (post free 8d.), on application to the SECRETARY.
WHITE ST., MOORFIELDS, E.C.
(Near Moorgate and Liverpool Street Stations.) EVENING CLASSES in CHEMISTRY, METALLURGY, PHYSICS and MATHEMATICS designed to meet the requirements of
PRINCIPAL: SIDNEY HUMPHRIES, B.A., LL.B. (Cantab.) those engaged in CHEMICAL, METALLURGICAL and ELECTRICAL INDUSTRIES and in trades associated therewith.
EVENING CLASSES in ALL BRANCHES of SCIENCE Also preparation for the B.Sc. Examination of London Uni. versity.
Well-equipped LABORATORIES for Practical Work in Chemistry
and H. BURROWS, A.R.C.S., Ph.D., F.I.C.
all branches of PHYSICS. Metallurgy C. O. BANNISTER, Assoc. R.S.M.
Special Courses for London University Matric., Inter., and Final B.A., Mathematics G. M. K. LEGGETT, B.A.
B.Sc., Conjoint Board, Pharmaceutical and other examinations. Classes Every facility for special and advanced practical work in well-equipped are also held in all Commercial Subjects, in Languages, Literature and Art laboratories both in the afternoon and evening.
All Classes are open to both sexes.
SATURDAY COURSES for Matric., Inter., and Final B.A., B.Sc.
DAY COMMERCIAL SCHOOL. pool Street, Broad Street and Metropolitan Railway Stations. For details of the Classes apply at the Office of the Institute, or by
Prospectuses, and all other information, gratis on application. letter to the PrincipAL.
DAVID SAVAGE, Secretary. W. H. DAVISON, M.A., Clerk to the Governing Body.
B.A. AND B.Sc. EXAMS. BALLIOL COLLEGE, CHRIST
MATRICULATION, INTERMEDIATE, FINAL. CHURCH, AND TRINITY COLLEGE,
PREPARATION by CORRESPONDENCE and ORAL TUITION OXFORD
a THOROUGHLY INDIVIDUAL SYSTEM. Fees based on A Combined Examination for Natural Science Scholarships and Exhibi- The STAFF includes Graduates of Oxford, Cambridge, London, and tions will be held by the above Colleges, beginning on TUESDAY, Royal Universities, Science Medallists, Prizemen, Scholars, &c. DECEMBER 6, 1904.
SINGLE SUBJECTS TAKEN: Science, Mathematics, Logic, Three Scholarships and three Exhibitions will be offered ; with one ex. Psychology, Political Economy, Latin, Greek, French, German, &c. ception the value of these endowments will be £80 a year.
For terms, &c., address Mr. J. CHARLESTON, B.A. (Lond. and Oxon.),
Particulars may be obtained by application to D. H. Nagel, Trinity PATENT OFFICE APPOINTMENTS.
Instruction in all the subjects of this Examination, in Day and Evening BOROUGH OF LONGTON (STAFFS.) Classes. Bilix students gained appointments at the July Examination.
UNIVERSITY OF BIRMINGHAM.
(FACULTY OF MEDICINE.) WANTED, to commence duty at the beginning of January next, an
PROFESSORSHIP OF ANATOMY. ASSISTANT MASTER for LANGUAGES, to teach French and
The Council invites applications for the CHAIR OF ANATOMY. German ; should also be able to teach Elementary Latin in the Evening Stipend, £800 per annum. The successful Candidate will be required to Classes. Salary, £120 per annum. Applications, stating age, qualifications, and previous experience, and
enter on his duties in January, 1905.
Applications, accompanied by sixty copies of testimonials, or such other accompanied by copies of not more than three recent testimonials, to be
credentials as the Candidates may prefer to offer, should be sent to the sent in to the undersigned not later than November 24, 1904.
undersigned on or before November 26, 1904. W. T. COPE, Secretary to the Education Committee. Further particulars may be obtained from Court House, Longton.
GEO. H. MORLEY, Secretary. IMPERIAL INSTITUTE, SOUTH
TO SCIENCE AND MATHEMATICAL
MASTERS.-- January (1905) Vacancies:-Required (1) Two Masters KENSINGTON, S.W.
for Mathematics and Experimental Physics. Salaries, £160 and £150
respectively: . (2) Science and Drawing. £!50. (3) Graduate or later. A CHEMICAL ASSISTANT is required in the Scientific and Technical B.Sc. for Science and Math. 6100, resident. (4) Chemistry and Department of the Imperial Institute. Experience of investigation in Physics, £100, resident. (5) Graduate for Science and Form work. Organic Chemistry essential. Applications to be made in writing.
£100, resident. For particulars of the above and many other vacancies, WYNDHAM R. DUNSTAN, Director. address Griffiths, Smith, Powell & Smith, Tutorial Agents (Estd. November 3, 1904.
1833), 34 Bedford Street, Strand, London. UNIVERSITY COLLEGE, READING.
Englishman (27), with Five Years' German
University Training and Ph.D. degree, speaking German fluently, DEPARTMENT OF AGRICULTURE.
desires situation in Manufactory, preferably of Dyes or Organic An ASSISTANT LECTURER in AGRICULTURE will shortly be Chemicals. Apply to "W., "c/o NATURE. appointed. Applications, with testimonials, should be sent to the Registrar on or before November 16, 1904.
For other Scholastic Advertisements, see page xii.
ABLOID BRAND PHOTOGRAPAIC CAEMICALS
HANDY INANY DARK ROOM
Bold by all Chemisto
BURROUGHS WELLCOME & CO
SNOW HILL BUILDINGS, LONDON.
(SPIRITS OF WINE). B.P. and higher strengths. Duty paid; or Duty
Free under Finance Act 1902.
TYPE-WRITING UNDERTAKEN BY
HIGHLY EDUCATED WOMEN ACCUSTOMED TO SCIEN.
Rev. H. MILLS, Greenside, Kendal.
Special Quotations to large
BOORD & SON,
DISTILLERS SINCE 1750,
COLOUR PHOTOGRAPHY. SANGER-SHEPHERD QUICK CHANGE, ONE PLATE, LATEST PATTERN OUTFITS.
EXCELLENT Photographs in Colour are obtained with our smaller lens filter Outfits, complete from 25/-; but for general work, Landscapes in changing light, Portraiture or Photomicrography where rapid exposures in succession are necessary, the Repeating Back with Colour Filters is recommended as the best all round appliance.
It may be attached to any , for whole-plate camera or glass plate Kodak, by means of a panel cut to.correspond and interchangeable with The ordinary dark slide. This does not in any way interfere with the use of the camera for ordinary work. The three Colour Filters are held in a frame, clipped in front of the double dark slide which carries the two plates, each large enough to record the three negatives side by side, when ihe slide is pushed past the opening in the outer case. With this Outfit, even a beginner will secure three-colour negatives with the ease and certainty of an ordinary photograph.
Repeating Back Attachments, with Filters complete, from 90/-
call and see results obtained by amateurs. SANGER-SHEPHERD & CO., 5, 6, 7 Gray's Inn Passage, Red Lion Street, Holborn, London.