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MACMILLAN & CO.'S NEW BOOKS.

1905 ISSUE NOW READY. THE STATESMAN'S YEAR-BOOK.

Statistical and Historical Annual of the States of the World for the Year 1905. Edited by J. SCOTT KELTIE, LL.D., Secretary to the Royal Geographical Society.

CROWN 8vo. 10s. 6d. NET. LANDSCAPE IN HISTORY & OTHER ESSAYS.

By Sir ARCHIBALD GEIKIE, D.C.L., F.R.S.

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8vo. 8s, 6d, net. ATHENÆUM.—“Whilst Sir Archibald's wide experience in the field as a professional geologist has led to his intimate acquaintance with British scenery in every phase, his constant use of the hammer has in no way lessened the power of his pen, and the volume of essays under review, like his former collection of 'Sketches,' forms a charming contribution to the literature of his favourite science.'

TWENTY-SIX GRADUATED EXERCISES IN CRAPHIC STATICS,

some in Two Colours, and with Skeleton Data to practise upon, and including the Application to Roofs, Moving Locomotives, Retaining Walls, Lévy's Steel Arches, Girders (Original Constructions), Masonry Arches, 'Lévy's Weight Tables, with an Essay on Graphical Statics, in the form of a Running Commentary on the Exercises, each of which has full Instructions printed on its face, the

whole forming a Supplement to the Authors' Elementary Applied Mechanics. By T. ALEXANDER, M.Inst.C.E.I., Professor of Engineering, Trinity College, Dublin ; and A. W. THOMSON, D.Sc., C.E., Professor of Engineering, College of Science, Poona. FCAP. BROADSIDE. SEWED. 10s.

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A MONTHLY MAGAZINE OF EDUCATIONAL WORK AND PROGRESS.
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School Cadet Corps. 1. By Edward C. Goldberg, M.A., Capt. Ist Middlesex R.E.(V.).-The Incidental Teaching of
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From an Irish Correspondent.-The Biological Side of Nature-Study. II. Animal Lise. By Oswald H Latter, M.A.
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MACMILLAN AND CO., LIMITED, LONDON.

RECENT & COMING ECLIPSES.

Sir NORMAN LOCKYER, K.C.B., F.R.S.

BY

Second Edition, containing an account of the Observations made at Viziadrug, in India, in 1898, and of the conditions of the Eclipses

visible in 1900, 1901 and 1905. 8vo. 6s. net.

WATKINS & DONCASTER,

THE NEW COLLECTION OF

336 SPECIMENS AND SLIDES OF ROCKS, CABINETS AND APPARATUS

Naturalists and Manufacturers of

according to H. ROSENBUSCH: “Elemente der FOR ENTOMOLOGY, BIRDS' EGGS AND SKINS, AND ALL

Gesteinslehre, 2d ed. 1901.”
BRANCHES OF NATURAL HISTORY!

Accompanied by a text-book : "Practical Petrography," giving a short SPECIAL SHOW-ROOM FOR CABINETS.

description of the polarizing microscope and its application, and also of the NR-For Exorllence and Superiority of Cabinets and Apparatus, refer. | macroscopical and microscopical features of every specimen of this collec. exces are permitted to distinguished patrons, Museums, Colleges, &c. . tion, by Professor Dr. K. Busz of the University of Münster. This

collection is intended for the practical use of students, and contains typical A LARGE STOCK OF INSECTS, BIRDS' EUGS AND SKINS.

representatives of all importaut types of rocks; it is composed of 277 SPECIALITY.-Objects for Nature Study, Drawing masive rocks (94 deep-seated rocks, 50 dike rocks, 133 volcanic rocks), Classes, &c.

28 sedimentary, and 31 crystalline schists. Out of it two smaller collections

of 250 and 165 specimens have been selected. The prices are as follows :Birds, Mammals, &c., Preserved and Mounted by First-class Workmen true to Nature.

Collection J. 336 Specimens of Rocks ... 380 Marks. All Books and Publications on Natural History supplied.

la. 336 Slides ...

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11. 250 Specimens of Rocks ... 270 ,, 36 STRAND, LONDON, W.C.

lla. 250 Slides ...

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III. 165 Specimens of Rocks 170 Our Catalogue (96 pp.) Post free on application.

111a. 165 Slides ... ... ... ... 205 m

COLLECTIONS OF MINERALS, FOSSILS, METEORITES, ROCKS, MINERALS, FOSSILS. For Collectors, Students, Technical Schools, Colleges, &c.

PURCHASED FOR CASH OR EXCHANCED. COLLECTIONS IN POLISHED DEAL BUXES.

The fifth edition of Catalogue No. 4, Petrography, has just *5 Specimens, 5/6; 50 do., 10/6; 100 do., 21/-; 200 do., 42/so Coal Measure Rocks and Fossils, 12/6; do., larger, 15/

been published (210 pages), and will be sent tree of charge on Adapted for the Board of Education Examinations in

application. Geology, Physiography, and Mineralogy. A large stack of Minerals, Rocks, Fossils and Microscopic Objects for

Dr. F. KRANTZ, selection. Specimens sent on approval. Cabinets, Geologists' Hammers, Chisels, Card Trays, Glass-capped RHENISH MINERAL OFFICE, BONN-ON-RHINE, GERMANY. Boxes, Models of Crystals, &c., &c.

ESTABLISHED 1833.
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GRATIS AND POST FREE.
Scientifically arranged Catalogue of Megascopic and Microscopic
Specimens is now being prepared. Gentlemen are invited to send in their

applications without delay, as only 5000 copies will be issued. Gentlemen interested in the above study are invited to send to Sample Slide of expertly prepared ROCK SECTION, 1/-, post free.

Metals, Minerals and Rocks expertly mounted for Microscope, JAMES R. GREGORY & CO.,

1- each, from material supplied. 1 Kelso Place, Kensington Court, London, W.,

LESSONS IN PRACTICAL LITHOLOGY BY CORRESPONDENCE.

A vacancy for one Geological Student, desirous of passing with high disfor a Prospectus ot

tinction in University or Civil Service. Small premium. Pocket-money THE TWENTIETH CENTURY ATLAS OF allowed. Apply :- THE DIRECTOR, MICROLOGICAL LABORATORY, MICROSCOPICAL PETROGRAPHY,

11 ASPENLEA ROAD, HAMMERSMITH, LONDON, W. being issued in Twelve Monthly Parts, each Part containing Four Fine

Half Tone Plates, and also Four actual Rock Sections. Sabseription in advance, either Monthly, 7/-; Quarterly, 21/-; or for the whole Series of 12 Monthly Parts & 48 Sections, £4 4s.

MICROSCOPICAL PETROGRAPHY.

LIVING SPECIMENS FOR

THE MICROSCOPE.

Volvox, Spirogyra, Desmids, Diatoms, Amaba, Arcella, Actinospbærium, Vorticella, Stentor, Hydra, Floscularia, Stephanoceros, Melicerta, and many other specimens of Pond Life. Price is. per Tube, Post Free. Helix pomatia, Astacus, Amphioxus, Rana, Anodon, &c., for Dissection purposes.

THOMAS BOLTON, 25 BALSALL HEATH ROAD, BIRMINGHAM.

MINERALS, ROCKS, FOSSILS.
A large stock of BRITISH AND FOREIGN MINERALS always on view.
CORNISH MINERALS

A SPECIALITY.
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RICHARDS' SHOW ROOMS,
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London, S.W.
ALBERT EDWARD JAMRACH

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NATURALIST, 180 ST. GEORGE STREET EAST. implements of Savage Warfare, Idols, Sacred Masks, Peruvian Pottery,

Netsakis China, Lacquers, Gongs, Shells, and other Curios.

MARINE BIOLOGICAL ASSOCIATION

OF THE UNITED KINGDOM.

THE LABORATORY, PLYMOUTH,
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or preserved by the best methods :-

Sycon; Clava, Obelia, Sertularia ; Actinia, Tealia, Caryophyllla, Alcy.
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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
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WOODHOUSE INCLINED PLANE.

Price 25/TOWNSON & MERCER,

Full Particu'ars of above and other forms of ELECTRICAL MEASURING
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N.B. - The official test at the Charlottenburg Institute showed that with this glass the alkali dissolved by 100 c.c. of distilled water is i milligrammes as compared with dir milligrammes dissolved from Jena glass under the same conditions. IT IS AS CHEAP AS THE COMMON BOHEMIAN GLASS.

wew May be had in BEAKERS (various forms), FLASKS (all shapes), TUBING (any size).

Price List free on application to
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H.M. GOVERNMENT 148 HIGH HOLBORN, LONDON, W.C.

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A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE

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

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E.C
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45 Cornhill;

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BIRKBECK COLLEGE BREAM BUILDINGS. CHANCERY LANE, E.C. FACULTY OF SCIENCE.

DAY AND EVENING COURSES. Chemistry

SJ. E. MACKENZIE, Ph.D., D.Sc ...

H. WREN, Ph.D., B.A., B.Sc.

ALBERT GRIFFITHS, D.Sc. Physics ...

D. Owen, B.A., B.Sc.

B. W. CLACK, B.Sc.
Mathematics

| E. H. SMART, M.A.
" W.G. BIRT, B.A., B.Sc.

A. B. RENDLE, M.A., D.Sc. Botany ... ... .. "" " F. E. FRITSCH, Ph.D., B.Sc. Zoology ...

- H. W. UNTHANK, B.A., B.Sc. Geology & Mineralogy ... Geo. F. HARRIS, F.G.S. Assaying, Metallurgy & Mining. Geo. PATCHIN, A.R.S.M.

RESEARCH in Chemistry and Physics in well-equipped laboratories. French, German, Spanish, Russian, Dutch, & Italian Classes. EVENING CLASSES also in Biology, Physiology, Practical Geometry,

and Machine Construction, Steam, Theoretical and Applied Mechanics, Land and Quantity Surveying, and Estimating.

Calendar 6d. (post free 87.), on application to the SECRETARY.

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THE OPTICAL CONVENTION will be held at the North

1 AMPTON INSTITUTE, CLERKENWELL, E.C., from May 31 to June 3, inclusive.

The object of the Convention is to bring into co-operation those interested in Optical Matters, from all sides of the question, theo. retical, practical, and commercial.

The mornings will be devoted to papers and discussions on Optical subjects. These will be collected in a volume to be issued by the Convention.

There will be an EXHIBITION OF OPTICAL & SCIENTIFIC INSTRUMENTS of British manufacture, in the large ba!l of ihe Northampton Institute, during the Convention, open daily from 12 to 10 p.m. In connection with this, a catalogue is in preparation, which will be a useful work of reference in regard to instruments manufactured in this country.

The Subscription for Membersbip of the Convention will be five shillings. Applications for membership should be addressed to the Hon. Sec., Mr. F. J. SELBY, M.A., Elm Lodge, Teddington, Middlesex, who will be glad to furnish further particulars if desired. ADMISSION to the Exhibition, daily, ONE SHILLING,

after 7 p.m., Sixpence. Tickets admitting to the Exhibition at any time while it is open, 2/6.

At the SOUTH-WESTERN POLYTECHNIC,

Manresa Road, Chelsea, S.W., Day College Courses of thirty bours per week are conducted in preparation for the London University Degrees of B.Sc. in Mechanical and Electrical Engineering, in Chemis. try, Physics and the Natural Sciences. The composition fee for the Session of three terms, 1904-1905, is £15. These Courses are recog. nised for "Internal Students of the University, and consist of lecture and laboratory instruction. The Courses are conducted by :MECHANICAL ENGINEERING, W. W. F. Pullen, A. Macklow Smith; ELECTRICAL ENGINEERING, A J. Makower; CHEMISTRY, J. B. Coleman, J. C. Crocker, and F. H. Lowe; MATHEMATICS and PHYSICS, S. Skinner, W. H. Eccles, J. Lister and L. Lownds; BOTANY, H. B. Lacey and T. G. Hill; GEOLOGY, A. J. Maslen. In the evenings similar Courses will be conducted, but at £2 per Session. Also TECHNICAL DAY COURSES of three years' duration are arranged as a preparation for the Engineering, Electrical and Chemical and Merallurgical professions. The Laboratories and Workshop are open for RESEARCH under the direction of The Principal and the Heads of Departmenis.

Further particulars may be obtained on application to The SECRETARY, who will send either the Day College Prospectus and Calendar or the Evening Class Prospectus for 3d, The Prospectuses may be had at the Office for id. each,

ROYAL GEOGRAPHICAL SOCIETY.

The ANNIVERSARY MEETING of the Society for the ELECTION of PRESIDENT and COUNCIL, &c., will be held in the THEATRE, BURLINGTON GARDENS, on Monday, May 22, at 3 p.m., the President in the Chair.

In place of the Annual Dinner of the Society a BANQUET in honour of the retiring President, Sir Clements R. Markham, K.C.B., will be held on the Evening of the Anniversary Meeting, May 22, at the Hotel Metropole, Whitehall Rooms, Whitehall Place, at 7.0 p.m. for 7.30. Dinner charge. £IIS. Friends of Fellows are admissible to the dinner as far as space will permit. Applications for tickets should be made to the Chief Clerk, i Savile Row, Burlington Gardens, W.

LEONARD DARWIN, I Hon.
J. F. HUGHES,

Secretaries, Savile Row, Burlington Gardens, W.

HIGHER MATHEMATICS FOR SCIENCE AND OTHER STUDENTS. Correspondence Tuition by highly qualified graduates of

Oxford, Cambridge, London and Royal Universities, in Algebra,Trigonometry, Theoretical Mechanics, Differ. ential and Integral Calculus, Pure Geometry, Geometrical Drawing, &c.

Departments are at work preparing for London and Royal University Examinations, Science and Art, Civil Service Examinations, and all Prof. Preliminaries --Apply to Mr. J. CHARLESTON, B.A., Burlington Correspondence College, Clapham Common, London, S.W.

THE AGENT-GENERAL for the CAPE

OF GOOD HOPE has been instructed to receive applications for the vacant post of PROFESSOR OF ZOOLOGY to the SOUTH

AFRICAN COLLEGE, CAPE TOWN, up to June 1 next. Candidates must be under 35 years of age, and their applications should

be supported by copies of testimonials and a medical certificate. The salary offered is 6500 per annum on appointment, £600 per annum after three years' service, 6700 per annum after ten years' service, together with a merit grant of 675 per annum after five years, increasing

to Eroo after ten years. An allowance of £50 will be made to cover the cost of the journey to the

Colony. The accepted Candidate is to assume duty in Cape Town during the first

week in July, or so soon thereafter as possible. 100 Victoria Street, London, S.W.,

May 2, 1905.

BATTERSEA POLYTECHNIC,

BATTERSEA PARK ROAD, S.W. Principal-SIDNEY H. WELLS, Wh.Sc., A.M.I.C.E., A.M.I.M.E.

A special SUMMER COURSE of Eight Lectures, followed by Labora. tory Work in GAS ANALYSIS, will be held by Mr. J. Wilson, M.Sc. (Head of Chemical Department), on Wednesday Evenings, commencing May 17.

Lecture, 7.15 to 8.15. Lab., 8.15 to 9.45. Fee, 5s.
For other special courses for Int, and Final B.Sc., see prospectus.

The “N” Fellowship, tenable at Cambridge

and open to former science students of Newnham and Girton Colleges, will be vacant in the autumn. The holder is required to conduct original research in science during her tenure of the fellowship, with preference to the chemical physiology of animals and plants. Appli. cations must be sent in by June 8 to the PRINCIPAL OF NEW HAM COLLEGE, from whom further particulars may be obtained

For other Scholastic Advertisements, see page xvi.

UNIVERSITY COLLEGE OF NORTH

WALES, BANGOR. (A CONSTITUENT COLLEGE OF THE UNIVERSITY OF Wales.)

Applications are invited for the post of ASSISTANT LECTURER IN THE DAY TRAINING DEPARTMENT now vacant. Special subjects: Elementary Science, Blackboard Drawing. Salary, 4120.

Applications and testimonials should be received not later than Monday, June 12, by the undersigned, from whom further particulars may be obtained.

JOHN EDWARD LLOYD, M.A.,

TYPE-WRITING UNDERTAKEN BY

HIGHLY EDUCATED WOMEN ACCUSTOMED TO SCIEN. TIFIC MSS. (Classical Tripos, Intermediate Arts, Cambridge Higher Local, thorough acquaintance with Modern Languages). Research, Revision, Translation. Scale of charges on application. The Cam.

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