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A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE

"To the solid ground
Of Nature trusts the mind which builds for aye.”—WORDSWORTH.

No. 1831, VOL. 71) THURSDAY, DECEMBER 1, 1904.
Registered as a Newspaper at the General Post Office.)

[PRICE 15 CENTS.

(All Rights are Reserved.

Mit 2

NEW LANTERN SLIDES.

SEASON 1904-1905.

DETAILED LIST ON APPLICATION. Russo-Japanese_War.

Tissot's New Series of Old Trans-Siberian Railway.

Testament Pictures. Up-to-Date Pictures of Cur- Tennyson's Heroines. rent Events,

Caldecott's Nursery Tales. The Balkans and the Eastern ** Black Beauty.". Question.

British Birds and Beasts. The Bayeux Tapestry:

Natural History. Life of Christopher Columbus. Trees and Plants. Austria and the Tyrol.

Rock Formation. A Snapshot Ramble among Radium Atoms and Spectra. the Alps.

Photographs of Sand Figures Scenes in Many Lands.

on Chaldni's Plate. St. Ives, Cornwall.

The Embryology of a Chicken. London and London Life. How the Coin of the Realm Among the London Poor.

is made. Pilgrim's Progress (R.T.S.). The Fall of a Water Drop. Life & Times of Martin Luther. Radiographs showing 'Bone Scripture-Old Testament. Diseases. Scripture-New Testament. The Starry Heavens. Too Gold Medals hare been awarded to Messrs. Newton & Co.

for Lanterns and slides. NEWTON Opticians to H.M. The King and H.R.H. The Prince

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ING.

EAST LONDON TECHNICAL

NORTHERN POLYTECHNIC
COLLEGE,

INSTITUTE,
MILE END ROAD, E.

HOLLOWAY, LONDON, N.
TEACHING STAFF.
Mathematics

SJ. L. S. HATTON, M.A., and (Close to Holloway Stn., G.N.R., and Highbury Stn., N.L.R.)

1 W. F. S. CHURCHILL, M.A. Chemistry J. T. HEWITT, D.Sc., and

LONDON UNIVERSITY SCIENCE AND ENGINEERING c. SMITH, D.Sc.

DEGREES. Mechanical Engineering ... D. A. Low, M.I.M.E.

Day and Evening Courses in the above under recognised teachers inElectrical Engineering

J. T. MORRIS, A.MI.E.E.
Physics

MATHEMATICS,
R. A. LEHFELDT. D.Sc., and
W. H. WHITE, B.A., B.Sc.

PHYSICS,
Botany
V. H. BLACKMAN, M.A.

CHEMISTRY,
The DAY CLASSES for students over 16 years of age include full three

ENGINEERING. years' technical courses in Chemistry and Engineering, and three years' courses for London University Degrees (Pass and Honours).

Separate Laboratories for Elementary, Advanced and Honours students, EVENING CLASSES are held in Advanced Technical and Scientific exceptionally large and well equipped. subjects, and for London University Degrees. Valuable SCHOLARSHIPS are awarded by the Drapers' Company in

RESEARCH. connection with the Day Classes.

Accommodation and apparatus provided for research in either Pare or Calendar with full particulars post free, 4fd.

Applied Chemistry and Physics, and Engineering, in rooms specially
J. L. S. HATTON, Director of Studies.

adapted for this purpose.
Full particulars at the Institute or sent on receipt of postcard.

REG. S. CLAY, D.Sc., Principal.
SALOP COUNTY COUNCIL.

HIGHER EDUCATION.
NOTICE IS HEREBY GIVEN that an EXAMINATION will be

PRACTICE) held in Shrewsbury early in January, 1905, to elect to an Exhibition for In BIOLOGY, BOTANY, CHEMISTRY and PHYSIOLOGY for Science Subjects of the value of £50 per annum tenable for not more than MEDICAL EXAMS. three years, by Candidates who hold or have held an open Scholarship or Especial Course of Instruction in THERAPEUTICS, PHARMAExhibition at some University or College of University rank approved by COLOGY and MICROSCOPY for INSTITUTE OF CHEMISTRY the Salop Education Authority. The Exhibition is open to natives of EXAM. Shropshire, and also to those who received their education within the

Mr. FREDERICK DAVIS, The Laboratories, County for the two years immediately preceding the time at which they joined the Institution in which they hold or have held their qualifying

(Registered in Column B (Advanced Education), Teachers Registration Scholarship: In awarding the Exhibition special regard will be bad to the

Councii, Board of Education, S.W.), need of qualifying Candidates for further pecuniary assistance. Entries, on 49 and 51 IMPERIAL BUILDINGS, LUDGATE CIRCUS, E.C. forms to be obtained om the SECRETARY, Higher Education, Shirehall, Shrewsbury, must be received by the undersigned not later than December

WANDSWORTH TECHNICAL 20, 1904. W. H. PENDLEBURY, M.A.,

INSTITUTE. Shirehall, Shrewsbury,

Secretary for Higher Education. November 28, 1904.

Geo. F. GOODCHILD, Principal.

DIPLOMA IN EDUCATION FOR SECONDARY TEACHERS. BEDFORD COLLEGE FOR WOMEN.

A Class for Teachers preparing for the London University Diploma for (UNIVERSITY OF LONDON.)

Teachers will commence on Monday, December 5, at & p.m. Full details

of the Course may be obtained at the Institute, or free by post. YORK PLACE, BAKER STREET, W. The LENT TERM begins on THURSDAY, JANUARY 19, 1905, GLAMORGAN COUNTY COUNCIL.

The College provides instruction for Students preparing for the University of London Degrees in Arts, Science, and Preliminary Medicine,

EDUCATION COMMITTEE. also instruction in subjects of General Education. There is a Training Department for Teachers, a Hygiene Department,

PHYSICAL INSTRUCTOR. and an Art School.

The Education Committee desire to appoint a TRAVELLING IN. Students can reside in the College.

STRUCTOR. who must be a Trained Gymnast, to teach PHYSICAL Particulars on application to the PRINCIPAL.

EXERCISES, GYMNASTICS and DRILL in County Schools.

The whole time of the person appointed shall be devoted to the service of BEDFORD COLLEGE FOR WOMEN. the County Council, and he shall reside where directed by them. (UNIVERSITY OF LONDON.)

Salary, 4140 per annum, advancing by £10 a year to £170, with Travel

ling Expenses. YORK PLACE, BAKER STREET, W.

Applications, accompanied by a statement of the system or systems

candidates are qualified to teach, their previous teaching experience and DEPARTMENT FOR PROFESSIONAL TRAINING IN ages, together with copies of their Diplomas and of not more than three TEACHING.

recent testimonials, must reach the undersigned not later than December 7, SCHOLARSHIPS FOR SECONDARY TRAINING.

1904. Two Scholarships, each of the value of £10, will be offered in January,

Personal canvassing will be deemed a disqualification. 1905. The Scholarships will be awarded to the best Candidates holding a

JOHN JAMES, M.A., Ph.D., Degree, or equivalent, in Arts or Science.

Chief Education Oficial Applications should be made not later than December 13, 1904, to the Education Department, Westgate Street, Cardiff, HEAD OF THE TRAINING DEPARTMENT, Bedford College.

November 22, 1904. CIVIL SERVICE COMMISSION.

COUNTY BOROUGH OF WEST HAM. FORTHCOMING EXAMINATION.

MUNICIPAL TECIINICAL INSTITUTE. ASSISTANT EXAMINERS IN THE PATENT OFFICE (20–25), 15TH DECEMBER.

The Council invite applications for the following post on the Teaching The date specified is the latest at which applications can be received.

Staff of the Institute : They must be made on forms to be obtained, with particulars, from the

DEMONSTRA COR in MECHANICAL ENGINEERING. Salary. SECRETARY, Civil Service Commission, Burlington Gardens, London, W.

£150 per annum

Candidates must have read the Circular giving particulars of the daties GOVERNMENT GRANT to defray the GRANT to defray the attached to the post, copies of which may be obtained by sending a fully

addressed envelope to the PRINCIPAL, Municipal Technical Institute, expenses of Scientific Investigations. Applications for the year 1905 West Ham, E. must be received at the Offices of the Royal Society not later than All applications must be lodged with the PRINCIPAL before noon, January 31 next, and must be made upon printed forms to be obtained December 5, 1904. from the CLERK TO THE GOVERNMENT GRANT COMMITTEE, Royal

By Order of the Council, Society, Burlington House, London, W.

FRED. E. HILLEARY, Town Clerk.

Education Department, West Ham. E.
TO SCIENCE AND MATHEMATICAL
MASTERS.--

January (1905) Vacancies. -Required (1) Graduate for WEST MONMOUTHSHIRE SCHOOL,
Physics and Mathematics. 6140 to £180. (2) Mathematics and
Science. 6130. County School, London. (3) Science Master for

PONTYPOOL. County School near London-Botany chief subject. £140 cm.

ASSISTANT MASTERS wanted for January next. Science and mence (4) Science and Drawing. L150. (5) Chemistry and Phyiin.

Mathematics, 6150; Form Master, 6120. £100, resident. (0) Graduate for Science and Form work. Luo,

Applications to be sent to the HEAD MASTER. resident. For particulars of the above and many other vacanties, address Griffiths, SMITH, Powell & Smith, Tutorial Agents (totd. 1833), 34 Bedford Street, Strand, London.

For other Scholastic Advertisements, see page xlv.

BROWNING'S MICRO-CAMERAS.

MICROSCOPE JUBE

CREWKERNE SCHOOL, SOMERSET.

The Governing Body invite applications for the HEAD MASTERSHIP of the above mentioned Public Secondary School for Boys. The school will, by the scheme under which it will be regulated, be conducted as a Public Secondary School working in accordance with the regulations of the Koard of Educating with a view to receiving Grants from the Board of Education and the Somerset County Council. Salary, 6200 per annum, together with an annual Capitarion Fee of £2 per pupil (which are guarantee 1 for three years) and residence.

(MICROKAM-Regd.) Permission to receive Boarders at a charge of £25 exclusive of Tuition

A simple yet perfect InstruFees (26and £2 for books, games, drill, and swimming bath. Accommodation for 120 pupils, including 45 boarders.

ment for Photographing

Objects under the MicroApplicants must be University Graduates and registered on Col. B. of tbe Teacbers' Register, or hold equivalent qualifications.

scope. Rxperience in a large school essential.

No. 1.-Mahogany, 5s. The appointment to date from the close of the Easter Holidays, 1905.

No. 2.-Do., with Focussing Applications, with copies of not less than three recent testimonials, should

Screen and Double Dark be sent not later than December 13 to the undersigned, from whom further

Slide

16s. 6d. information can be obtained.

Do. do. (31 square) 31s. 6d. JOHN SPARKS, Solicitor, Crewkerne,

Adapt ng ei her to fit MicroNovember 26, 1904. Clerk to the Governors.

scope ...

.. 9d.

Brass Adapter, do. ... 3s. 6d. STAFFORDSHIRE COUNTY COUNCIL.

EDUCATION COMMITTEE.

SCIENCE APPLIED TO POTTERY. WANTED, a PHYSICAL SCIENTIST with first class University qualifications in Chemistry as Instructor to the County Pottery Classes in North Staffordshire. Salary: 6350 per annum (with prospects of future developments in connection with the proposed North Staffordshire College). Private practice allowed under conditions. Any form of canvassing will disqualify.

Forms of application must be returned not later than December 17, and can be obtained, together with a Schedule of Conditions, from

GRAHAM BALFOUR, M.A.
County Education Offices, Stafford,
November 28, 1904.

Science Gossip says :-“From a personal experience we can vouch
TECHNICAL COLLEGE,

for the fact that it is capable of doing fairly critical work, ana it

is therefore specially suitable for students in the photographing SUNDERLAND,

of bolanical, entomolo, cal and histological speciniers.”

K’nowledge (Microscopical Editor) says :-"I have seen this class LECTURESHIP IN MECHANICAL AND CIVIL

of camera used by ardent photographers who have wished to ENGINEERING.

secure a photograph of a unique or interesting specimen."

, Lectureship in Engimeering at the Municipal Technical Institute, Belfast, JOHN BROWNING, Manufacturing Optician, applications are invited for the above post. Salary, 6300 per annum ; no fees Age Dot to exceed forty years. The standard of the teaching is that

78 STRAND, LONDON, W.C.
of a University College, and candidates must therefore be qualified to give
instruction of this standard. Applications, with a duplicate set of not more
than three testimonials, to reach the undersigned at the College not later
than December 11, 1904. Apply for further particulars to

A
BENCHARA BRANFORD, Principal.
November 29, 1904

UNIVERSITY OF LONDON.
The SENATE invite applications for the post of WARDEN of the
GOLDSMITHS' COLLEGE, New Cross, at a salary of £150 per annum.
The Warden of the College will also act as head of the Training Coliege to

makes an acceptable
be opened in October, 1905. Applications, accompanied by thirty copies of
not more than five testimonials, must reach the University not later than
December 20, 1904, and should be addressed to the Principal, University
of London, South Kensington, S.W., from whom further particulars may be
obtained.
ARTHUR W. RÜCKER, Principal.

To ensure prompt delivery Orders SCIENCE AND MATHEMATICAL

should be booked at once. MASTERSHIPS VACANT. Science Public College, £200; North England. Chemistry and Physics, 6175. Mathematics and Chemistry. Ireland, £150. Chemistry, £120. Mathematical, £180. A list of Masterships, England, Continent, and Over Sea, sent to all Candi. dates.- ORELLANA & Co., Est. over 40 years, 80 Wigmore Street, Cavendish Square, London, W. (lale 44 Old Bond Street, W.).

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SANGER - SHEPHERD

COLOUR OUTFIT

CHRISTMAS GIFT.

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SCIENCE AND MATHEMATICAL MASTERS. Messrs. NEEDES & SELLICKS,

(Medical and SCHOLASTIC Agency, Estab, 1860), Clock House, Arundel Street, Strand, W.C. Applications are invited for the following appts. :-(1) Public Sch., Nat. Sc and Drawg., £150+fees; valuable post to good man. (2) Chem. and Physics little English. Games preferred. £120, res. (3) Chem. + Magtietism and Electricity. 6100, res. (4) Wrangler, Public School. 6110, res. (s) County School, Maths. £110, non-res. Many January Appointments.

Complete Outfits to attach to Plate Cameras, including
Repeating-Back as above, and every requisite,

from £7 10 0
Send for New Booklets, post free to readers of Nature,"

or call and see results obtained by amateurs.

SCIENCE MASTER Wanted for Cape

Colony in February. Large Public School. Unmarried man and churchman required. £150, resident. Free passage. Testimonials must accompany enquiries. Apply to Professor Lewis, Cambridge.

SANGER-SHEPHERD & Co.,

5, 6 & 7, Gray's Inn Passage, Red Lion St., Holborn, London, W.C.

For other Scholastic Advertisements, see page xliv.

LIQUID AIR AND LIQUID HYDROGEN.

150 to 200 atmospheres pressure, making over a litre of liquid per METHYLATED

METHYLATED SPIRIT

RECTIFIED SPIRIT

(SPIRITS OF WINE). Dr. HAMPSON'S AIR-LIQUEFIER is now made to a standard pat. tern, and numbers are in use in University Laboratories and elsewhere in B.P. and higher strengths. Duty paid; or Duty various countries. The whole apparatus is neat and compact and its parts

Free 'under Finance Act 1902. very easily moved ; the Liquefier, without stand, being a cylinder 17 inches high and 8 inches in diameter.

It begins to liquefy air in from 6 to 10 minutes after the admission of air at from hour.

It requires no auxiliary refrigerant and produces a perfectly clear liquid which requires no filtering. The operator bas only one gauge to watch and one valve to control.

Special Quotations to large HYDROGEN LIQUEFIER to the designs of Dr. MORRIS W.

Institutions. TRAVERS for use in conjunction with Air-Liquefier.

BOORD & SON, For Prices and Particulars apply to the Sole Makers :

DISTILLERS SINCE 1750, BRIN'S OXYGEN COMPANY, LIMITED,

115-121 Tooley Street, ELVERTON STREET, WESTMINSTER, S.W.

LONDON, S.E. MACMILLAN CO.'S LIST.

VOLUME VII. NOW READY.

THE CAMBRIDGE NATURAL HISTORY.

EDITED BY S. F. HARMER, Sc.D., F.R.S., AND A. E. SHIPLEY, M.A., F.R.S.
TO BE COMPLETED IN TEN VOLUMES. FULLY ILLUSTRATED. 8vo. PRICE 175. NET EACH.

VOLUME VII. FISHES, &c.
FISHES (exclusive of the Systematic Account of Teleostei). By T. W. BRIDGE, Sc.D., F.R.S. FISHES (Systematic
Account of Teleostei). By G. A. BOULENGER, F.R.S. HEMICHORDATA. By S. F. HARMER, Sc.D., F.R.S.
ASCIDIANS AND AMPHIOXUS. By W. A. HERDMAN, D.Sc., F.R.S.

PREVIOUSLY PUBLISHED.
WORMS, LEECHES, &c.

INSECTS. PART II.
VOLUME II.

VOLUME VI.
Flatworms. By F. W. GAMBLE, M.Sc. Nemertines. By

Hymenoptera continued (Tubulifera and Aculeata), Coleop. Miss L. SHELDON. Threadworms, &c. By A. E.

tera, Strepsiptera, Lepidoptera, Diptera, AphanipSHIPLEY, M.A., F.R.S. Rotifers. By Marcus HARTOG,

tera, Thysanoptera, Hemiptera, Anoplura. By M.A. Polychaet Worms. By W. BLAXLAND BENHAM, DAVID SHARP, M.A., F.R.S. D.Sc. Earthworms and Leeches. By F. E. BEDDARD, M.A., F.R.S. Gephyrea, &c. By A. E.

AMPHIBIA

REPTILES. SHIPLEY, M.A., F.R.S. Polyzoa. By S. F. HARMER,

VOLUME VIII.
Sc.D., F.R.S.

By Hans Gadow, M.A., F.R.S.
SHELLS.
VOLUME III.

BIRDS.

VOLUME IX. Molluscs and Brachiopods. By the Rev. A. H. COOKE,

By A. H. EVANS, M.A. With numerous Illustrations by G. E. A. E. SHIPLEY, M.A., F.R.S., and F. R. C. REED, M.A.

LODGE.
INSECTS & CENTIPEDES.

MAMMALIA.
VOLUME V.

VOLUME X. Peripatus. By ADAM Sedgwick, M.A., F.R.S. Myria. By FRANK Evers BeDDARD, M.A. Oxon., F.K.S., Vicepods. By F. G. SINCLAIR, M.A.

Insects. Part I. Secretary and Prosector of the Zoological Society of By DAVID SHARP, M.A., F.R.S.

London. The volume dealing with SPIDERS, SCORPIONS, and CRUSTACEA is in the Press, and the remaining volume, dealing with PROTOZOA (including Sea Anemones, Jelly Fish, Star Fish, &c.), is in active preparation.

SECOND EDITION NOW READY. THE PRINCIPLES OF INORGANIC CHEMISTRY.

. By Wilhelm OSTWALD. Translated with the Author's sanction by ALEX. FINDLAY, M.A., Ph.D., D.Sc., Lecturer on Physical Chemistry, University of Birmingham. With 126 Figures in the Text. Second Edition. 8vo. 185. net.

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MACMILLAN AND CO., LIMITED, LONDON.

WONDERS OF LIFE:

THE ROYAL DUBLIN SOCIETY, IMPORTANT NEW WORK BY SCIENTIFIC TRANSACTIONS.

PROF. HAECKEL.
Volume VIII., Series II., Part IX., with two plates, sewed, is.

READY DECEMBER 7th.
Researches on the Physical Properties of an Extensive Series of
Alloys of Iron, Parts IY. and Y.

Cloth, xiv.-501 pp., price 6s. net ; by post, 6s. 4d. By W. F. BARRETT, F.R.S., W. BROWN, B.Sc., and

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R. A. HADFIELD,
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PART X., sewed is.

THE
The Photometry of N-Rays. By E. E. Hackett, B.Sc.

PART XI., sewed is.
On the Extraction of Glucinum from Beryl.
By JAMES HOLMES POLLOCK, B.Sc.
PART XII., sewed 15.

A POPULAR STUDY OF BIOLOGICAL PHILOSOPHY.
On the State in which Helium Exists in Pitchblende.
By RICHARD J. MOSS, F.I.C., F.C.S.

By ERNST HAECKEL,
SCIENTIFIC PROCEEDINGS.

PROFESSOR AT JENA UNIVERSITY.
Volume X., Part II., No. 23. Price 6d.
Remarks on the cases of Carbon Monoxide Asphyxiation that

This supplementary volume to “THE RIDDLE OF THE have occurred in Dublin since the Addition of Carburetted

UNIVERSE"contains much additional valuable informatior Water-gas to the Ordinary Coal Gas.

on biological questions dealt with in that work. It also answers

indirectly many of the criticisms to which the world-Samed By E. J. McWEENEY, M.A., M.D., D.P.H., M. R. I. A., Professor of Pathology at the Catholic University Medical School,

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“DIE LEBENSWUNDER ” (“THE WONDERS OF Volume X., Part II., No. 28. Price 6d. On a Method in Qualitative Analysis for Determining the LIFE”) was published in Germany at the end of September, Presence of Certain Metallic Oxides.

and within less than three weeks the whole of the first large By CHARLES R. C. TITCHBORNE, F.I.C.,

impression was sold. An enormous circulation, in this country Dip. P.H., F.C.S, &c.

and the Colonies, is anticipated for the English translation. THE INTERNATIONAL BOOK CIRCULAR, No. 129. Containing a special article entitled: "Some Contemporary Foreign

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