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BOXES WITH GLASS LIDS WATKINS & DONCASTER,
Naturalists and Manufacturers of
BRANCHES OF NATURAL HISTORY.
Drawing Classes, &c.
Workmen true to Nature.
(Five Doors from Charing Cross.)
FLATTERS & GARNETT, Ltd.,
Makers of Lantern and Microscope Slides, 32 DOVER STREET, MANCHESTER, S.E.
MINERALOGY, GEOLOGY & PETROLOGY.
Sales by Auction.
SALES OF MISCELLANEOUS PROPERTY.
that SALES are held EVERY FRIDAY, at his Rooms, 38 King
On view Thursday 1.30 to 5.30 and morning of Sale.
Single Specimens and Collections
for Prospectors, Teachers and Students.
LISTS FREE from-
Telephone No. 2841 Western. Tel. Add., "Meteorites," London.
THOMAS BOLTON, 25 BALSALL HEATH ROAD, BIRMINGHAM. MARINE BIOLOGICAL ASSOCIATION
OF THE UNITED KINGDOM.
THE LABORATORY, PLYMOUTH.
Sycon; Clava, Obelia, Sertularia; Actinia, Tealia, Caryophyllia, Alcy.
Minerals, Rocks, Fossils, Metallic
all prices. Inspection invited.
Single Crystals and Teaching Specimens In Great Variety.
RICHARDS' SHOW ROOMS,
The following choice Norwegian
Monazite, 8/6; and Beryl, 5/-;
on view and sale at
Ground-Floor Show Rooms,
John Street (Theobald's Road) is reached from
21 PER CENT. INTEREST
allowed on Deposit Accounts
on Drawing Accounts with Cheque Book.
All general Banking Business transacted.
particulars, POST FREE.
NOTICE.-Advertisements and business letters for "Nature" should be addressed to the Publishers; Editorial Com.
SUBSCRIPTIONS TO • NATURE."
1 10 6
NET CHARGES FOR ADVERTISEMENTS.
2 6 One Sixth Page, or One Third Col. 1 7 0
Quarter Page, or Half a Column 1 15 0
* Lines in heavy type are charged for as Two Lines.
OFFICE: ST. MARTIN'S STREET, LONDON, W.C.
THE EDUCATIONAL BAROCRAPH, with £3 15 0
SIMPLE yet EFFICIENT. .
ink and charts for one year
Size 12 x 6 x 6 inches.
OTHER BAROGRAPHS in VARIOUS PATTERNS Catalogue free on request.
from £4 4 0 to £12 12 0 Demonstrations given by Appointment.
Illustrated Catalogue, Part II, Post Free. OXFORD HOUSE,
J. H. STEWARD, 9 OXFORD ST., LONDON,
Optician and Scientific Instrument Maker,
406 & 457 STRAND, LONDON.
NEW HOLOS IMMERSION PARABOLOID
RINT SON SONS
Gives an intensely black background on a brilliantly illuminated object with high-power Objectives up to '95 N.A. The maximum effect is obtained by using a brilliant source of light and a Bull's-eye. It is specially suited for the exhibition of unstained living Bacteria.
PRICES Optical part only, mounted to fit the Abbe Illuminator Carrier supplied with English Microscopes, with Oil and supply of suitable Slips
£1 10 0 HOTEL
Complete Holos Immersion Paraboloid with mounting for Substage or Understage to fit any Microscope,
0 12 6 Working instructions sent with each Paraboloid. Full particulars on application. W. WATSON & SONS, LTD., Microscope Makers, Wholesale and Retail,
313 HIGH HOLBORN, LONDON, ENGLAND. 2 EASY ROW, BIRMINGHAM.
Branch-16 FORREST ROAD, EDINBURGH. Depots 78 SWANSTON STREET, MELBOURNE, AUSTRALIA.
DALLMEYER'S “ADON’TELEPHOTO LENS
Can be used in front of any
Mounted in Aluminium. small lens without disturbing
Measures 34 ins. long, i ins. plates or films which may be
diameter, weighs 41 ounces. in position.
PRICE, including Solid Leather Can be used alone for higher
Case, £3 10 0 nett. magnification or larger plates.
ILLUSTRATED BOOKLET with An excellent lens for all
Specimens of Work artistic photography.
Show Rooms :-25 NEWMAN STREET, W.
THE CELEBRATED DALLMEYER PORTRAIT
A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE.
“ To the solid ground
Of Nature trusts the mind which builds for aye.”-WORDSWORTH. No. 2079, VOL. 81] THURSDAY, SEPTEMBER 2, 1909
[PRICE SIXPENCE Registered as a Newspaper at the General Post Office.)
(All Rights are Reserved.
NEW PATTERN “NEWTONIAN
“NEWTONIAN" CHEAP ELECTRIC LANTERN.
5067 New Iron-Body Lantern, with brass front, fitted on mahogany board, 4-in. double Condenser, best full-size achro. matic Front Lens, and “ Newtonian " Hand-Feed Arc Lamp. Complete in Case
OPTICIANS TO HIS MAJESTY THE KING
3 FLEET STREET, LONDON.
Covering the subjects of Astronomy, Biology, Botany,
to every Branch of Medical Science.
Library immediately on publication.
Quarterly List of Additions to Library
sent post free.
IMPERIAL COLLEGE OF SCIENCE AND TECHNOLOGY, NORTHERN POLYTECHNIC INSTITUTE, BIRKBECK COLLEGE,
HOLLOWAY, LONDON, N. Close to Holloway Stn. (G.N.R.), Highbury Stn. (N.L.R.), Holloway Rd. Stn. (B. & P. Tube), & Highbury Stn. (G.N.Tube). LONDON UNIVERSITY SCIENCE AND ENGINEERING
ENGINEERING. Separate Laboratories for Elementary, Advanced and Honours studeots exceptionally large and well equipped.
RESEARCH. Special arrangements for students undertaking research during vacations. Full particulars at the Institute or sent on receipt of postcard.
REG. S. CLAY; D.Sc., Principal.
SOUTH KENSINGTON, LONDON, S.W.,
including as integral parts The ROYAL COLLEGE OF SCIENCE, the ROYAL SCHOOL OF MINES, and the
CITY AND GUILDS COLLEGE
Visitor-HIS MAJESTY THE KING. Chairman-The Right Hon. the EARL OF CREWE, K.G. Rector-HENRY T. BOVEY, LL.D., M. Inst.C.E., D.C.L., F.R.S.
Secretary-ALEXANDER GOW, M.A., B.Sc. The SESSION begins on OCTOBER 5, 1909, and ends on JULY 1, 1910.
The Departments of the College are : ROYAL COLLEGE OF SCIENCE-Mechanics and Mathematics,
Physics, Chemistry, Botany, Zoology, Geology. ROYAL SCHOOL OF MINES-Mining, Metallurgy, CITY AND GUILDS COLLEGE-Mathematics, Civil and Mechanical Engineering, Electrical Engineering, Chemistry.
The fees average £35 a year. SPECIAL COURSES of ADVANCED LECTURES will be given as
under (subject to change): PHYSICS.--Colour Vision. (Sir William Abney, K.C.B., D.Sc., D.C.L.,
F.R.S.) Spectrum Analysis. (Asst. Prof. A. Fowler, A.R.C.S., F.R.A.S.) Physical Changes in the Cylinder of an Internal Com. bustion Engine. (Dr. W. Watson, D.Sc., A.R.C.S., FR.S) High Temperatures and Optical Pyrometry. (Prof. H. L. Calendar, M.A., LL.D., F.R.S.) Radio-activity. (Prof. the Hon. R J. Strutt, M.A., F.R.S.) Magnetic Properties of Metals and Alloys. (Dr. S. W. J.
Smith, M.A., D.Sc., AR.C.S.) CHEMISTRY.-Gaseous Fuel and Combustion. (Prof. W. A. Bone,
D.Sc, Ph.D., F.R.S.)
Engineering Students. (Asst. Prof. Percy Groom, M.A., D.Sc.,
Director Marine Biol. Assocn.) Embryology. (Mr. Richard Assheton,
Fellow of Trinity Coll., Cam.)
M.Sc., F.R.S., F.G.S.) METALLURGY.--Advanced Metallurgy of. Copper, Gold, Silver, Lead,
and Alloys. (Prof, W. A. Carlyle, Ma.E., MI.MM) ENGINEERING.–Railway Engineering. (Prof. W. E. Dalby, M.A.,
B.Sc., M. Inst.C.E.; Mr. W. T. Stephenson, M A.; Mr. H. G. Brown, M.I.E.E. ; Mr. Philip Dawson, M.İnst.C.E., M.I.M.E., M.I.E.E.) The fees for the above range from £1 1os. to £4, except for the full courses in Metallurgy and Engineering (fees 65 to £10 and £20 respectively).
The Calendar may be obtained, price 6d., or post free 9d., either directly or through any bookseller, from Messrs. Eyre and Spottiswoode, East Harding Street, London, E.C.
For special information apply to the SECRETARY, Imperial College of Science and Technology, Exhibition Road, London, S.W.
THE SIR JOHN CASS TECHNICAL
Principal-Charles A. KEANE, D.Sc., Ph.D., F.I.C. EVENING CLASSES in CHEMISTRY, PHYSICS and MATHEMATICS designed to meet the requirements of those engaged in CHEMICAL and ELECTRICAL INDUSTRIES and trades asso iated there with
Also preparation for the B.Sc. Examination of London University. Courses for Honours B.Sc. in Physics
CHARLES A KEAE, D.Sc., Pn.D., F.I.C., Chemistry
H. BURROWS, A.R.C.S., Ph.D., F.I.C., and
A. R. SMITH, M.Sc., F.I.C. Physics
R. S. WILLOWS, M.A., D.Sc. Mathematics
E. C. SNOW, B.A. Every facility for Advanced Practical Work and Research in well-equipped laboratories both in the alternooi and evening.
New Session begins Thursday, September 23
For details of the Classes apply at the Office of the Institute, or by lette to the PRINCIPAL.
THE MUNICIPAL SCHOOL OF
TECHNOLOGY, SACKVILLE STREET, MANCHESTER, The ENTRANCE EXAMINATIONS for the Day Departments inMECHANICAL, ELECTRICAL, and SANITARY ENGIN.
EERING; The CHEMICAL INDUSTRIES, including BLEACHING,
DYEING, PRINTING, PAPER-MAKING, BREWING,
PHOTOGRAPHY and PRINTING; will be held on MONDAY, TUESDAY and WEDNESDAY, SEP. TEMBER 13, 14 and 15, at 9.30 a.m.
The School forms the Faculty of Technology of the Victoria University of Manchester, and Students can prepare for the Degree of B.Sc. Tech. or M.Sc. Tech., or the Certificate of the University.
PROSPECTUS and Entrance Form on application. CALENDAR 6d., by post rod.
J. H. REYNOLDS, M.Sc., Principal.
ENGINEERING AND TECHNICAL OPTICS. NORTHAMPTON POLYTECHNIC
INSTITUTE, CLERKENWELL, LONDON, E.C. MECHANICAL AND ELECTRICAL ENGINEERING AND
ELECTRO-CHEMISTRY. Full Day Courses in the Theory and Practice of the above subjects will commence on Monday, October 4, 1909. Entrance Examination on Wednesday and Thursday, Seplember 29 and 30. These courses include periods spent in Commercial Workshops, and extend over four years. They also prepare for the degree of B.Sc in Engineering at the University of Lo don. Fees, 615, or En per annum.
THREE ENTRANCE SCHOLARSHIPS of the value of 652 each will be cff:red for competition at the Entrance Examination in September next.
TECHNICAL OPTICS. Full and Part Time Day Courses in all branches of this important department of Applied Science given in specially equipped laboratories and lecture rooms,
Full particulars as to sees, dates, &c., and all information respecting the work of the Institute, can be obtained at the Institute or on application to
R. MULLINEUX WALMSLEY, DSc., Principal.
CITY OF LONDON COLLEGE.
NEW SESSION COMMENCES SEPTEMBER
MILE END ROAD, E. The College is situated close to stations on the G.E.R., District Railway and L.T. and Southend Railway, and is approached from The Royal
Exchange in 15 minutes by motor omnibus.
PASS AND HONOURS COURSES in the FACULTIES OF ARTS, SCIENCE AND ENGINEERING. Latin, Greek, English, French, German, English History, Mathematics, Physics, Chemistry, Botany, Geology. CIVIL AND MECHANICAL ENGINEERING,
ELECTRICAL ENGINEERING. Courses in the above subjects are likewise arranged for Evening Students. PRELIMINARY AND MATRICULATION CLASSES.
MODERATE FEES. Valuable Scholarships are offered annually by the Worshipful Company of Drapers. Calendar post free on application to the REGISTRAR, or
J. L. S. HATTON, M.A., Principal.
ACTING IN CONJUNCTION WITH THE LONDON CHAMBER OF COMMERCE. WHITE ST., and ROPEMAKER ST., MOORFIELDS, E.C.
(Near Moorgate and Liverpool Stroot stations.) PRINCIPAL: SIDNEY HUMPHRIES, B A. LL.B. (Cantab.)
Michaelmas Term begins Monday, Seplember 27. EVENING CLASSES in SCIENCE Well-equipped LABORATORIES for Practical Work in CHEMISTRY, BOTANY, GEOLOGY, and all branches of PHYSICS.
Special Courses for Conjoint Board, Pharmaceutical and other examinations. Classes are also held in all Commercial Subjects, in Languages, an Literature Art Studio. All Classes are open to both sexes.
SATURDAY CLASSES for Chemistry and Physics.
DAY MOD RN SCHOOL Prepara ion for a COMMERCIAL or BUSINESS career or the CIVIL SERVICE. Prospectuses, and all other information, gratis on application.
DAVID SAVAGE, Secretary.
LEICESTER SQUARE, LONDON,
NEW SESSION begins MONDAY, SEPTEMBER 27. BEDFORD COLLEGE FOR WOMEN.
(UNIVERSITY OF LONDON.)
YORK PLACE, BAKER STREET, LONDON, W.
PRINCIPAL-Miss M. J. TUKE, M.A.
Lectures are given in preparation for all Examinations of the University
of London in Arts, Science and Preliminary Medicine ; for the Teacher's
Diploma, London; the Teacher's Certificate, Cambridge; and for the
Cambridge Higher Local Examination.
Six Laboratories are open to Students for practical work.
There is a special course of SCIENTIFIC INSTRUCTION. IN
HYGIENE designed to furnish training for Women Factory and Sanitary
Inspectors, and Teachers of Hygiene.
The ART SCHOOL may be attended by students who are not taking
other subjects at the College. Qoology J. W. EVANS, D.Sc. ; A. M. DAVIES, D.Sc.
A single course in any subject may be attended. Mathomatico... E. H SMART, M.A. ; C. V. Coates, M.A.
Regular Physical Instruction is given free of cost to students who desire Classics F. A. WRIGHT, M.A.; G. S. ROBERTSON, M.A.
it by a fully qualified teacher. Eng. Literature J. H. LOBBAN, M.A.
Accommodation for about 40 resident students is provided in the College.
The College has opened as an additional residence South Villa, Regent's Qorman E. L MILNER-BARRY, M.A.
Park, where further accommodation for 15 students is provided. South Qoography J. F. UNSTEAD, M.A.
Villa is about five minutes' walk from York Place, and has large gardens History T. SECCOMBE, M.A.
available for students of the College.
Full particulars on application to the PRINCIPAL at the College.
DEPARTMENT FOR PROFESSIONAL TRAINING Assaying. Metallurgy. Mining. G PATCHIN, A.R.S.M.
HEAD OF THE DEPARTMENT-Miss Mary MORTON, M A. Prospectus free, Calendar 3d. (post free 5d.), from the Secretary.
The Course includes full preparation for the Examinations for the Teach.
ing Diplomas granted by the Universities of London and Cambridge. THE UNIVERSITY OF LIVERPOOL. Students are admitted to the Training Course in October and in January; SESSION 1909-10.
One Free Place (value 626 55.), one Scholarship of the value of [20, and
limited number of grants of Lio, are offered for the Course beginning in The AUTUMN TERM commences on OCTOBER 5, 1909.
January, 1910. Prospectuses and full particulars of the following may be obtained on
They will be awarded to the best candidates holding a degree or its application to the Registrar :
equivalent in Arts or Science.
Applications should be sent to the HEAD OF THE DEPARTMENT not
later than December 1.
THE ROYAL DENTAL HOSPITAL
WINTER SESSION opens OCTOBER 1, 1909.
The new Hospital was opened in 1901. The School is thoroughly
equipped for teaching purposes, including a TEACHING MUSEUM and School of Veterinary Medicine and Surgery.
a LIBRARY; METALLURGICAL and HISTOLOGICAL LABORASchool of Dental Surgery.
TORIES; Departments for BACTERIOLOGY and RADIOGRAPHY. Scbool of Pharmacy.
lhe Clinic of the Hospital is UNRIVALLED, the work being carried on in
SCHOLARSHIPS and PRIZES.
The ENTRANCE SCHOLARSHIP in Mechanical Dentistry of £25.
Open only to Pupils of Private Practitioners.
The SAUNDERS SCHOLARSHIP of 620.
The STORER-BENNETT SCHOLARSHIP of £50. The Matriculation Examination of the Joint Board, or its equivalent, The ALFRED WOODHOUSE SCHOLARSHIP of £35. must be passed before a student is registered for a Degree Course.
The ROBERT WOODHOUSE SCHOLARSHIP of 210.
SIXTEEN CLASS PRIZES.
FIVE HOUSE SURGEONS appointed every six months. THE MUSPRATT LABORATORY OF PHYSICAL
The Laboratories occupy an entire floor of the building and are well AND ELECTRO-CHEMISTRY.
fitted. Pupils can JOIN AT ANY TIME for the two years' training in
Mechanical Dentistry specified in the Curriculum or PUPILS OF PRIVATE UNIVERSITY OF LIVERPOOL.
PRACTITIONERS FOR SHORTER PERIODS.
SPECIAL SCHOLARSHIPS. This Laboratory is specially fitted and equipped for study and research ia Pure and Applied Electro-chemistry. Electric current (direct or alter.
Open only to those joining for the two years' Mechanica and nating) up to 1000 amperes, and power up to 80 kilowatts are available,
subsequent two years' Hospital training. enabling all classes of electrolytic and electrothermal work to be carried An ENTRANCE SCHOLARSHIP OF £50 } Chemistry, Physics. out. Special Lecture and Laboratory Courses in Pure and Applied An ENTRANCE SCHOLARSHIP of 225 Electro-chemistry are held every year, beginning in October. Fee for A SCHOLARSHIP of £25. Awarded aiter two years' mechanical research students, 13 per annum. Further information may be obtained training. Metallurgy and Mechanical Dentistry. from the undersigned,
Examinations will be held September 22 and 23.
AND SPECTROMETERS These instruments are of the best workmanship throughout; the prisms are of very dense glass of superior quality, and the object glasses achromatic.
The slit is provided with a right angled reflecting prism, by whicb two spectra may be seen in the field of view at the same time, and may be easily compared. The lines or bands in any spectrum can be accurately measured in degrees and minutes of angular deviation.
Prices from £7.
FREE on application.
78 STRAND, LONDON. Estab. 1765.
Tel. No.: 7804 Central.
J.BAG WEINE. LONDON.
JOHN BROWNING, OPTICIAN,