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NOW READY. GRAPHIC STATICS. By T. ALEXANDER, C.E., M. Inst.C.E.I., M.A.I. (hon. causa), Professor of Engineering, Trinity

College, Dublin ; and Professor A. W. THOMSON. D.Sc., C.E., Member Inst. Engineers, Scotland. A Graduated Series of Problems and Practical Examples, with numerous Diagrams all drawn to Scale. 8vo. Limp Cloth.

NEW EDITION REVISED IN ACCORDANCE WITH THE FOURTH GERMAN EDITION.
THEORETICAL CHEMISTRY FROM THE STANDPOINT OF AVOGADRO'S RULE AND THERMODYNAMICS.
By Prosessor WALTER NERNST, Ph.D., of the University of Göttingen. 8vo.

158. net.
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SECOND-HAND TELESCOPES.
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List, including many others, on application.
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SECOND-HAND MICROSCOPES.
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COLLINS' Binocular, £10; Leitz' II B, with Mechanical Stage, £8 10s.
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LANTERN SLIDES.
Collection of Lantern Slides for Lectures on

A. PETROLOGY,
Arranged by Professor Dr. K. BUSZ of Münster.
The Mode of Occurrence of Rock-forming
Minerals : 50 Slides ...

£3 10
Do.
taken by crossed nirols: 20 Slides ...

Li 8 3. The Microstructure of Rock-forming Minerals: 80 Slides

£5 12

£3 10 4. The Structures of Rocks : 36 Slides

£2 10 5. Collection of typical Rocks, taken in ordinary light: 100 Slides

£7 60 Slides ... 6. Do. taken under crossed nicols : 75 Slides

45 5 ба. Dо.

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45 Slides ... B. GEOLOGY & PALEONTOLOGY, Arranged by Professor Dr. F. J. P. van CALKER of Groningen. 1. Paleontological Problematica : 30 Slides

+2 2 0 Historical Geology (Type Fossils, "Toula" Collection): 30 Slides...

£2 2 3. Tectonic Geology: 30 Slides...

£2 za. Protozoa (Foraminifera, Radiolaria): 25 Slides

kr 15 Pisces : 30 Slides

£2 a 5. Amphibia : 12 Slides 6. Reptilia and Aves: 50 Slides

£3 10 7. Mammalia : 70 Slides

65 00 The collection of slides of Volcanoes and "Crystallography will soon be ready.

Detailed Catalogue of Lantern slides in preparation; prospectus post free. Single slides are sold at is. 6d. each.

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Deposits. 21% Interest allowed on Deposit Accounts.
Advances made. Stocks and Shares bought and sold.
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ESTABLISHED 1833.

MICROSCOPICAL PETROGRAPHY,

WATKINS & DONCASTER,

Gentlemen interested in the above study are invited to send to

JAMES R. GREGORY & CO., 1 Kelso Place, Kensington Court, London, W.,

for a Prospectus of
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Dow being issued in Twelve Monthly Parts, each Part containing Four Fine

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Cabinets, Geologists' Hammers, Chisels, Card Trays, Glass-capped Gammarus, Ligia M ysis, Nebalia, Carcinus ; Patella, Buccinum, Eledone,

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Descriptive Pamphlet gratis on application from the Sole Agents for Great Britain and its ColoniesTHE MEDICAL SUPPLY ASSOCIATION,

228 GRAY'S INN ROAD,

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Illustrated Pamphlet Post Free.
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AND CO., LIMITED, at St. Martin's Street, London, W.C., and THE MACMILLAN COMPANY, 66 Filth Avenue, New York. - THURSDAY, Jan. 5. tgos,

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A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE

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

[PRICE 15 CENTS.

No. 1837, VOL. 71) THURSDAY, JANUARY 12, 1905.
Registered as a Newspaper at the General Post Office.)

(All Rights are Reserved.

THE SIEGE OF PORT ARTHUR.

REYNOLDS & BRANSON, Ltd.
Chemical and Scientific Instrument Makers to His Majesty's

Government (Indian, Home, and Colonial).
LABORATORY FURNISHERS and MANUFACTURING CHEMISTS.

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A Set of 42 Slides to

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of the Siege. 42/- the Set complete. PLAIN PHOTOGRAPHIC Supplementary List of this Season's Slides post free.

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SLIDES.

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to National Physical Laboratory, Teddington, fitted for Gas, Water Opticians to H.M. The King and H.R.H. The Prince

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DESIGNS OF BENCHES AND FITTINGS TO SUIT ALL REQUIREMENTS. 3 FLEET STREET, LONDON.

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ROYAL INSTITUTION OF NORTHERN POLYTECHNIC

INSTITUTE,
GREAT BRITAIN.

HOLLOWAY, LONDON, N. ALBEMARLE STREET, PICCADILLY, W. (Close to Holloway Stn., G.N.R., and Highbury Str., N.LR.) TUESDAY next, January 17, at Five o'clock, Professor L. C. MIALL,

LONDON UNIVERSITY SCIENCE AND ENGINEERING D.Sc., F.R.S., Fullerian Professor of Physiology, R.I. First of Six

DEGREES
Lecturers on Adaptation and History in the Structure and Life of
Animals." One Guinea the Course.

Day and Evening Courses in the above ander recognised teachers in-
THURSDAY, January 19, at Five o'clock, Professor CHURTON COLLINS,
M.A. First of Two Lectures, I. "The Religion of Shakespeare. II. The

MATHEMATICS, Philosophy and Significance of the 'Tempest.' Half-a-Guinea.

PHYSIOS, SATURDAY, January 21, at Three o'clock, Professor CHARLES OMAN,

CHÉMISTRY, M.A., F.S.A. First of Two Lectures on "Wat Tyler in London.'

ENGINEERING. Half-a-Guinea. Subscription to all the Courses in the Season, Two Guineas.

Separate Laboratories for Elementary, Advanced and Honours students FRIDAY EVENING, January 20, at Nine o'clock, Professor Sir exceptionally large and well equipped. JAMES DEWAR, M.A., LL.D., D.Sc., F.R.S., on * New Low Temper.

RESEARCH. ature Phenomena."

Accommodation and apparatus provided for research in either Pure sa EAST LONDON TECHNICAL

Applied Chemistry and Physics, and Engineering, in rooms specially
adapted for this purpose.

Full particulars at the Institute or sent on receipt of postcard.
COLLEGE,

REG S. CLAY, D.Sc., Principal.
MILE END ROAD, E.

BEDFORD COLLEGE FOR WOMEN.
New Term Commonces JANUARY 9, 1905.
SJ. L. S. HATTON, M.A., and

(UNIVERSITY OF LONDON.)
Mathematics
W. F. S. CHURCHILL, M.A.

YORK PLACE, BAKER STREET, W.
Chemistry

J. T. HEWITT, D.Sc., and
C. SMITH, D.Sc.

The TERM begins on THURSDAY, JANUARY 9, 1905-
Mechanical Engineering ...

D. A. Low, M.I.M.E., and J. A. The College provides instruction for Students preparing for the li

DAVENPORT, B.Sc., Vict. versity of London Degrees in Arts, Science, and Preliminary Medicine, Electrical Engineering J. T. MORRIS, AMI.E.E.

also instruction in subjects of General Education.

There is a Hygiene Department and an Art School.
Physics
(R. A. LEHFELDT. D.Sc., and

Students can reside in the College,
W. H. WHITE, B.A., B.Sc.

Particulars on application to the PRINCIPAL.
Botany
V. H. BLACKMAN, M.A.

Two Entrance Scholarships, each one tenable for three years at Bedlund The DAY CLASSES for students over 16 years of age include full three College for Women, will be offered for competition in June, 1903. years' technical courses in Chemistry and Engineering, and three years'

DEPARTMENT FOR PROFESSIONAL TRAINING IN courses for London University Degrees (Pass and Honours). EVENING CLASSES are held in Advanced Technical and Scientific

TEACHING subjects, and for London University Degrees.

Students are admitted to the Training Course in October and January SCHOLARSHIPS of the value of £40 per annum will be awarded by the

The Course includes full preparation for the examinations for the Teaching Drapers' Company in June next.

Diplomas granted by the Universities of London and Cambridge, held CALENDAR with full particulars post free, 4fd.

annually in December. J. L. S. HATTON, Director of Studies.

THE LONDON SCHOOL OF TROPICAL

MEDICINE.
THE SIR JOHN CASS TECHNICAL
INSTITUTE,

(UNDER THE AUSPICES OF His MAJESTY'S GOVERNMENT JEWRY STREET, ALDGATE, E.C.

CONNAUGHT ROAD, ALBERT DOCK, E. Evening Classes in Chemistry, Metallurgy, Physics (IN CONNECTION WITH THE HOSPITALS OF THE SEAMEN'S and Mathematics designed to meet ihe requirements of those engaged in Chemical, Metallurgical and Electrical

HOSPITAL SOCIETY.) Industries and in trades associated there with.

The next SESSION commences on MONDAY, JANUARY 26, 1905. Special Courses during the Lent Term :GAS ANALYSIS CHARLES A. KOHN, M.Sc., Ph.D., F.I.C.

For Prospectus, Syllabus, and other particulars, apply to the Secretary, METALLOGRAPHY C. O. BANNISTER, Assoc. R.S.M.

P. MICHELLI, Esq., Seamen's Hospital, Greenwich, S.E.
Full curriculum for B.Sc. Examination of London
University in Experimental Science under recognised

(THEORY AND Teachers of the University.

PRACTICE)
GLASS BLOWING.

In BIOLOGY, BOTANY, CHEMISTRY and PHYSIOLOGY for
Two Courses of Instruction will be given during the Term by Mr. A. C. MEDICAL EXAMS.
CossoR.
NEW TERM begins MONDAY, JANUARY 9, 1905.

Especial Course of Instruction in THERAPEUTICS, PHARMA.

COLOGY and MICROSCOPY for INSTITUTE OF CHEMISTRY The Institute is readily accessible and near to Fenchurch Street, Liver. EXAM. pool Street, Broad Street and Metropolitan Railway Stations.

Mr. FREDERICK DAVIS, The Laboratories, For details of the Classes apply at the Office of the Institute, or by 'letter to the PRINCIPAL.

(Registered in Column B (Advanced Education), Teachers Registration W. H. DAVISON, M.A., Clerk to the Governing Body.

Council, Board of Education, 3.W.),

49 and 51 IMPERIAL BUILDINGS, LUDGATE CIRCUS, E.C. At the SOUTH-WESTERN POLYTECHNIC, THE GROCERS' COMPANY'S

Manresa Road, Chelsea, S.W., Day College Courses of thirty bours per week are conducted in preparation for the London University

SCHOLARSHIPS. Degrees of B.Sc. in Mechanical and Electrical Engineering, in Chemis- For the purpose of encouraging original research in Sanitary Science, the try, Physics and the Natural Sciences. The composition fee for the Grocers' Company offer Two Scbolarships, each of $300 a year, with an Session of three terms, 1904-1905, is £15. These Courses are recog; allowance to meet the cost of apparatus and materials and for general nised for "Internal Students of the University, and consist of expenses in connection with the work, tenable for two years, subject to the lecture and laboratory instruction. TheCourses are conducted by:- conditions of the scheme under which they are established. MECHANICAL ENGINEERING, W, W. F. Pullen and L. D. Coueslant; ELECTRICAL ENGINEERING, A. J. Makower ;

Applications must be sent in before April 1 to the CLERK OF TUR CHEMISTRY, J. B. Coleman, J. C. Crocker, and F. H. Lowe;

Grocers' COMPANY, Grocers' Hall, London, E.C., from whom the MATHEMATICS and PHYSICS, S. Skinner, W. H. Eccles, J. Lister

necessary forms and further information may be obtained. and L. Lownds; BOTANY, H. B. Lacey and T. G. Hill; GEO. LOGY, A. J. Maslen. In the evenings similar Courses will be con. TECHNICAL SCHOOL, GUILDHALL, ducted, but at £2 per Session. Also TECHNICAL DAY COURSES of three years' duration are arranged as a preparation for the

BATH. Engineering, Electrical and Chemical and Metallurgical professions.

A SCIENCE MASTER is required for Botany, Chemistry and some The Laboratories and Workshop are open for RESEARCH under the Physics. Salary, 6140. direction of the Principal and the Heads of Departments.

For Schedule of Duties, &c., apply, at once, to Further particulars may be obtained on application to the SECRETARY,

A. GODFREY DAY, Director of Studies.', who will send either the Day College Prospectus and Calendar or the Evening Class Prospectus for 3d. The Prospectus may be bad at

For other Scholastic Advertisements, see page cv and the Office for id.

page ii of Supplement.

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