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MESSRS. MACMILLAN AND CO.'S PUBLICATIONS.

NEW

AND

RECENT

MATHEMATICAL BOOKS.

R. R. LACHLAN.-AN ELEMENTARY TREATISE ON MODERN PURE GEOMETRY. By R. LACHLAN, M. A., late Fellow of Trinity College, Cambridge. 8vo, 9s.

R. J. EDWARDS.-DIFFERENTIAL CALCULUS FOR SCHOOLS. By JOSEPH EDWARDS, formerly Fellow of Sidney Sussex College, Cambridge. Globe 8vo, 4s. 6d.

GLASGOW HERALD.-"Mr. Edwards always strives to make matters plain, but in a thoroughly scientific manner, much to future advantage of the genuine student. The book is worthy of strong commendation."

SCOTSMAN.—"It has a special value in the skill with which, both in the exposition and the examples, it consults the needs those who are approaching the study of the Calculus for the first time, and will doubtless prove more serviceable than the vier text-books in large classes."

ROF. G. W. JONES.-LOGARITHMIC

WILLIAM JONES, of Cornell University. Royal 8vo, 4s. 6d. net.

TABLES.

By Prof. GEorge

GEOMETRY OF

ROF. W. B. SMITH.-INTRODUCTORY MODERN
POINT, RAY, AND CIRCLE. By WILLIAM BENJAMIN SMITH, A. M., Ph.D, Professor of Mathematics and
Astronomy in the University of the State of Missouri. Crown 8vo, 5s.

SCOTSMAN.-"The book presents its subject in a manner so fresh and novel as to be likely to inspire its students with a
v interest in geometry, to afford a valuable diversion from the monotony of Euclid, and to make them better acquainted with
I more interested in the intellectual aspects of the science. The book may be heartily recommended to the attention of teachers
■ students "
A NEW ELEMENTARY ALGEBRA.

ROF. N. F. DUPUIS.—THE PRINCIPLES OF ELEMENTARY ALGEBRA. By N. F. DUPUIS, M.A., F.R.S. E., Professor of Pure Mathematics in the University of Queen's College, Kingston, Canada. Crown 8vo, cloth, 6s.

SCOTSMAN.-"It is distinguished among works of its kind by the care and fulness with which it explains first principles. s so clearly and scientifically expounded that students in all stages of advancement will gain advantage by using it." LYCEUM.-"A book for which there was room; a book, too, which would deserve popularity in spite of any competition."

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65.

LES OF THE BIRDS. By W. WARDE FOWLER.
With Illos raions by BRYAN HOOK. Crown 8vo. 35. 6d.
YEAR WITH THE BIRDS. By the same Author.
With Illustrations by BRYAN HOOK. Crown 8vo.
3. 6.

OWERS, FRUITS, AND LEAVES.
By Sir
JOHN LUBBOCK, Bart., F. R. S. Illustrated. Crown
8vo. 4s 6d.

BRITISH WILD FLOWERS, IN RELATION
TO INSECTS. By the same Author. Illustrated. Crown
8vo. 45. 6d.

HE ORIGIN AND METAMORPHOSES OF
INSECTS. By the same Author. With numerous Illus-
trations. Crown 8vo.
35. 6d.

HE STUDENT'S FLORA OF THE BRITISH
ISLANDS. By Sir J. D. HOOKER, K.C.S.I. Globe
8vo.
10s. 6d.

COUNTRY.

AN OLD WOMAN'S OUTLOOK IN A HAMP-
SHIRE VILLAGE. By CHARLOTTE M. YONGE.
Crown 8vo. 3s. 6d.

ACADEMY.-"Miss Yonge is at her best in the word-
pictures of the downs, woods, and lanes of her home; while
her reminiscences of social life, and of the improvement which
has in the last fifty years overtaken village life, are most in-
teresting and valuable. . . . This Outlook, with its intense love
of birds and flowers, and its careful study of human life in the
country, will charm all who are like-minded, and, as the
authoress hopes, assist others to make the most of their
surroundings, so as to find no country walk devoid of the
homely delights that sustain and lift up the spirit."
THE HERB OF THE FIELD. By the same
Author. Reprinted from "Chapters on Flowers" in the
Magazine for the Young. Revised and corrected. Crown
8vo. 5s.
MADAME HOW AND LADY WHY; or, First
Lessons in Earth Lore for Children. By CHAS. KINGS-
LEY. With numerous Illustrations. Crown 8vo. 3s. 6d.
GLAUCUS; or, the Wonders of the Sea-shore. By
the same Author. With Coloured Illustrations. Crown
8vo. 35. 6d.
HANDBOOK OF FIELD AND GENERAL
ORNITHOLOGY. By ELLIOTT COUES, M. A.,
M.D., Ph.D., Member of the National Academy of
Sciences, &c. Profusely Illustrated. 8vo. Ios. net.
NATURE.-"We know, of no volume likely to be more
useful to the student who wishes to become acquainted with
birds.
No other manual that we are acquainted with
exactly takes its place or contains such a well-arranged mass of
useful and generally correct information on this subject."

WHITTAKER'S NEW

NEW LISTS POST FREE ON APPLICATION.

BOOKS.

BRITISH LOCOMOTIVES: their History, Construction, and Modern Development. By C. J.

BOWEN COOKE. With 150 Original Illustrations. Crown 8vo.

75. 6.1.
FIRST POPULAR EDITION.

[In a Few Weeks.

THE ATLANTIC FERRY: its Ships, Men, and Working. By ARTHUR J. MAGINNIS, Gold Medallist and Member of the Institution of Naval Architects. With numerous Illustrations, Tables of Records, and Full Index. Crown 20 Pictorial Paper Boards, 2s. 6d. COMPLETE EDITION, Crown 8vo. Clǝth, 75. 6d. THE DYNAMO: its Theory, Design, and Manufacture. By C. C. HAWKINS, M.A., A.I.E.E., and F. WALLIS, A.I.E.E. With 190 Illustrations, mostly from Original Drawings, and Full Index. Crown 8vo, about 530 pages, ros. 6d. [In a Few Days. THE MANAGEMENT OF ACCUMULATORS. By Sir D. SALOMONS, Bart., Vice-President of the Institution of Electrical Engineers, &c., &c. (Forming the first Part of the Seventh Revised and Enlarged Edition of the same Author's Work entitled "Electric Light Installations and the Management of Accumulators." 5s.)

DYNAMO MACHINERY (ORIGINAL PAPERS ON). By J. HOPKINSON, D.Sc. Crown

8vo, 5$. "Hopkinson's work on the dynamo during the last decade has been of such value that any publication of his investigations is to be welcomed by all."Scientific American.

By a "FOREMAN PATTERNMAKER,” Author of “ Principles of Patternmaking,” “Practical Ironfounding,” “Metal Turning," &c., &c. THE PRINCIPLES OF FITTING. With

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THE PRINCIPLES OF PATTERN.

MAKING. For Apprentices and Students in Technical Schools With Glossary of Terms, Index, and 101 Illustrations. 35. 6d. "The book is well and tersely written."-Glasgow Herald.

trated with over 100 Engravings. Second Edition. 45. "Contains much useful information for practical men "Industries.

New Work by W. PERREN MAYCOCK, M.I.E.E.

AN ELEMENTARY MANUAL OF ELECTRIC LIGHTING AND POWER DISTRIBUTION. For Students preparing for the Ordinary Grade Examinations of the City and Guilds of London Institute, and General Readers. In Three Parts, with 274 Illustrations. Crown 8vo. Paper Covers, 2s. 6d. each. [Part III. ready shortly. "We can conscientiously recommend it as fulfilling the object of its existence, and students will find it worth their while to read every word of it."Electrical Review,

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MESSRS. MACMILLAN AND
AND CO.'S
CO.'S NEW SCIENTIFIC BOOKS.

THE ROMANES LECTURE, 1893.

EVOLUTION

AND

ETHICS

By the Right Hon. T. H. HUXLEY, LL.D., F.R.S.

BEING THE ROMANES LECTURE DELIVERED IN THE SHELDONIAN THEATRE AT OXFORD, MAY 18, 1893. 8vo, sewed, 25. net.

OXFORD MAGAZINE.—“We can only profess our humble admiration of the masculine vigour alike of Prof. Huxley's thought and of the language in which it is clothed. A more exquisitely finished academic discourse was never placed before any audience in any language. Prof. Huxley's Romanes Lecture deserves to be remembered as one of the most brilliant gems in the prose literature of the nineteenth century,'

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NEW BOOK BY MR. F. W. H. MYERS.

SCIENCE AND A FUTURE LIFE, AND OTHER ESSAYS.

M.A. Globe 8vo, 5s.

I. Science and a Future Life.
II. Charles Darwin and Agnosticism.
III. The Disenchantment of France.

Contents:

By F. W. H. MYERS,

IV. Tennyson as Prophet.

V. Modern Poets and Cosmic Law.
VI. Leopold, Duke of Albany. In Memoriam.

NEW BOOK BY DR. WYNTER BLYTH.

LECTURES ON SANITARY LAW. By A. WYNTER BLYTH, M.R.C.S., L.S.A

Fell. Chem. Soc., Fell. Inst. Chem., Barrister-at-Law, Medical Officer of Health and Public Analyst for St. Marylebone Professor of Hygiene, College of State Medicine, &c. 8vo, 8s. 6d. net.

BY THE SAME AUTHOR.

A MANUAL OF PUBLIC HEALTH. Svo, 175. net.

MACMILLAN AND CO., LONDON.

Printed by RICHARD CLAY AND SONS, LIMITED, at 7 and 8, Bread Street Hill, Queen Victoria Street, in the City of London, and Published i MACMILLAN AND Co., at 29 Bedford Street, London, W.C., and 112 Fourth Avenue, New York.-THURSDAY June, 1893.

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BRITISH ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE.

BURLINGTON HOUSE, LONDON, W.

The NEXT ANNUAL GENERAL MEETING will be held at Nottingham, commencing on WEDNESDAY, SEPTEMBER 13.

President-Elect, Dr. J. S. Burdon Sanderson, M.A.. M.D., LL.D., D.C.L., F.R.S., F.R.S.E., Professor of Physiology in the University of Oxford.

NOTICE TO CONTRIBUTORS OF MEMOIRS.-Authors are reminded that the acceptance of Memoirs, and the days on which they are to be read, are as far as possible, determined by Organising Committees for the several Sections before the beginning of the Meeting. Memoirs should be sent to the Office of the Association.

Information about Local Arrangements may be obtained from the Local Secretaries, Guildhall, Nottingham. G. GRIFFITH, Assistant General Secretary. BALLIOL COLLEGE, CHRISTCHURCH,

AND

TRINITY COLLEGE, OXFORD. NATURAL SCIENCE SCHOLARSHIPS AND EXHIBITIONS. A combined Examination for Natural Science Scholarships and Exhibtions will be held by the above Colleges, beginning on TUESDAY, NOVEMBER 21, 1893.

Three Scholarships and Three Exhibitions will be offered, the Scholarships being worth £80 a year.

The subjects for examination will be Physics, Chemistry, and Biology, but Candidates will not be expected to offer themselves in more than two of these.

Particulars may be obtained by application to A. VERNON HARCOURT, Christ Church, Oxford.

THE CHESTER TECHNICAL

DAY SCHOOLS.

The Governing Body of the above School requires a HEAD MASTER who shall be qualified to teach Science Subjects in connection with the Department of Science and Art. Estimated Salary. £230. Guaranteed, £200.

Also an ASSISTANT MASTER to take Commercial Subjects, including Pitman's Shorthand (Elementary). Preference will be given to one holding a Certificate from the Education Department, and who is also qualified to teach not less than two Science Subjects.

Estimated salary, £142 105. Guaranteed, £125.

Particulars as to Duties, Salary, &c., will be sent on application to
C. R. ENOCK,

Clerk to the Governing Body.

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The Governors of the Royal Holloway College will shortly proceed to appoint Two Resident Women Lecturers, one in Chemistry, the other in Botany, for OCTOBER NEXT. Both must have experience in Lecturing and Demonstrating, and must be competent to prepare Students for the London B. Sc. Examination, and to take the management of a Laboratory. For the Lectureship in Botany preference will be given to a Candidate who can also undertake Zoology as a second Subject. Salary, 150 a Year. Applications, with Copies of Testimonials, should be addressed to the PRINCIPAL, Royal Holloway College, Egham, and must be sent in by JUNE 18.

CIVIL SERVICE COMMISSION.

FORTHCOMING EXAMINATION.

ASSISTANT KEEPERS (Art Branch) South Kensington Museum. ASSISTANT KEEPERS (Science Branch) South Kensington Museum (18-30) JULY 7.

The date specified is the latest at which applications can be received. They must be made on Forms to be obtained, with particulars, from the SECRETARY, Civil Service Commission, London, S.W.

HIGH SCHOOL OF DUNDEE. Wanted, an ASSISTANT in the SCIENCE DEPARTMENT, qualified to Teach Physiology, Botany, and Zoology. Salary, too, rising to £120. Applications, with Copies of Testimonials, to be lodged on or before JUNE 24 with the Secretary, A. W. CUMMING, I, Bank Street, Dundee.

THE ELECTRICAL

AND

GENERAL ENGINEERING COLLEGE,

AND

SCHOOL OF SCIENCE.

PENYWERN HOUSE, 2 PENYWERN ROAD, EARL'S
COURT, S.W.

PRINCIPAL-G. W. DE TUNZELMANN, B.Sc., M.I.E.E.
Telegrams-" Tunzelmann, London."

The Complete Courses qualify Students for entry into Electricalce se Engineering Works.

The First Year's Course is arranged to qualify Students for event. Cooper's Hill, the Central Institution Engineering College, or the Roya School of Mines.

Forty-one Students have entered these Institutions during the la three years, and two Entrance Scholarships have been oteained at th Central Institution.

The College is provided with very complete Laboratories and Dram room, and also with an extensive Geological Collection for the Prelimi Courses for Civil and Mining Engineering Students Students are regularly sent to the College by Leading Engiseert w Scientific Authorities, whose Names are given in the Prospectus.

WANTED. A Physicist and Mathematician

to investigate with Advertiser the Problem of the Probable Age of Earth. State Qualifications and Terms by Letter only, “x," 23 Air Place, Gower Street, W.C.

DISARTICULATED SKELETONS FOR BIOLOGICAL STUDENTS. Frog, 4s.; Rabbit, os: Pigenz, Fowl, 125.-Address, J. WILTON, Healey, near Batley.

DIAGRAMS for LECTURERS, ILLUSTRATIONS for AUTHORS, quickly and artistically done." J. S. 19. Waldegrave Road. Brighton.

ALBERT EDWARD JAMRACH (Late CHARLES JAMRACH) NATURALIST,

180 ST. GEORGE STREET EAST. Implements of Savage Warfare, Idols, Sacred Masks, Peruvian Fa87 Netsukis, China, Lacquer, Gongs, Shells, and other Curios.

LIVING SPECIMENS FOR

THE MICROSCOPE.

Volvox globator, Stentor cæruleus, Spongilla fluviatilis, Flor cornuta, Melicerta ringens, Notops brachionus. Plumatella repens, and t beautiful objects of Pond Life; also Amoeba, Hydra, Spirogyra, other types for Students. Specimen Tube, with Drawing Description, One Shilling, Post Free.

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Sale by Auction.

TUESDAY, JUNE 20.

VALUABLE NATURAL HISTORY SPECIMENS.

MR. J. C. STEVENS will Sell by Auction, at his Great Rooms, 38 King Street, Covent Garden, on TUESDAY, JUNE 20, at half-past 12 precisely, Valuable Natural History Speci mens, comprising a Collection of Exotic Lepidoptera, including many rarities. British Lepidotera and Coleoptera, a small choice Collection of Minerals, Birds' Eggs, Skins, &c. ; Animals' Skins, Heads and Horns, Fossils, Shells, Books, Cabinets, &c.

On view the Day prior from 10 till 4 and Morning of Sale, and Catalogues

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COLLECTIONS

FOR MUSEUMS FROM £5 TO £300.

EXCHANGES MADE FOR SPECIES NOT IN STOCK.

GLASS-TOPPED BOXES, CARD TRAYS, &c.

HUGH FULTON (Conchologist),
216 KING'S ROAD, LONDON, S.W.

ZOOLOGICAL STUDY.

The JERSEY BIOLOGICAL STATION is now OPEN to Workers. Each Worker has sole use of a Compartment, with Gas and Water Supply, use of Boats, Tow-nets, Dredges, Re-agents, Library, &c.

Tariff, 12s. 6d. per Week for First Fortnight.

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108 6d 78. 6d.

Second Fortnight. Thereafter.

Circular of the Station Regulations and Advantages on Application. Undoubtedly the pleasantest and most serviceable Research Laboratory in Britain.

In the Aquarium Tanks there are now breeding Hydractinia, Bunodes, Lucernaria, Crangon, and Palamon, Inachus, Palinurus, Aplysia, Doris, and Gasterosteus.

The Littoral in front of the Station is immense in area and extremely nch.

SINEL & HORNELL, Biological Laboratory, Jersey. COLLECTIONS OF MINERALS, ROCKS, OR FOSSILS,

For the Use of Students, Science Teachers, Prospectors, &c., and to illustrate the leading Text-books, in Boxes, with Trays.

50 Specimens, 10s. 6d.; 100 do., 21s.; 200 do., 42s. New Price List of Minerals. Rocks, and Stratigraphical Series of Fossils Post Free.

LOCK SECTIONS for the MICROSCOPE from 18. 6d. each, Post Free CATALOGUES GRATIS.

ABINETS, GLASS-CAPPED BOXES, TRAYS, HAMMERS, &c., always in Stock.

THOMAS D. RUSSELL,

78 NEWGATE STREET, LONDON, E.C.

H. BUTLER, M.A. Oxon., Assoc. R. S. Mines.

NATURAL HISTORY AGENCY,

158 BROMPTON ROAD, LONDON. ealer in Rocks, Minerals, Fossils, and other Objects of Scientific Interest.

Collections of Rocks, Minerals, Fossils, or Recent Shells furnished in tordance with special requirements. SCHOOL COLLECTIONS of Sedientary and Igneous Rocks, 35 specimens of fair size in case with divisions, Rabbits and other objects for Biological Study supplied. Card Trays ad Glass-topped Boxes of any required dimensions made promptly to order. ctions of Shells and general Lapidary's Work executed. Micro. Rockdes new to stock -Schistose Eleolite-Syenite, Norway; Dolerite, ley: Porphyritic Pitchstone, Beinn Shiant; and Sanidine Trachyte'

Jeichenberg.

DUBLIN UNIVERSITY PRESS SERIES.

A TREATISE ON THE ANALYTICAL GEOMETRY of the POINT, LINE, CIRCLE, and CONIC SECTIONS: containing an Account of its most Recent Extensions, with numerous Examples. By JOHN CASEY, LL.D., F. R.S. Second Edition, Revised and Enlarged. Crown 8vo, 125.

London: LONGMANS, GREEN, & CO.

THE IRISH NATURALIST.

A Monthly Magazine of Irish Zoology, Botany, and
Geology. Price 6d.

Edited by GEO. H. CARPENTER, B.Sc., and R. LLOYD
PRAEGER, B.A.

Vol. 1 (1892), Price 3s. 6d. Vol. 2 (1893) will be sent in Monthly Parts to any Address for 5s.

Dublin: EASON & SON, LTD., 40 Lower Sackville Street (to which Address Subscriptions should be sent). London: SIMPKIN, MARSHALL, HAMILTON, KENT, & CO. THE CRY OF THE CHILDREN.—An essay on Education by A Free Lance, Author of "On the Organisation of Science "Smartly, almost cynically, written. All educationalists to say nothing of parents) ought to read it" (Science Gossip). Paper Covers, 2s. 6d. net (post-free). WILLIAMS & NORGATE London.

JAMES R. GREGORY, MINERALOGIST AND GEOLOGIST,

SPECIAL AND TYPICAL COLLECTIONS for Students, Lecturers, Museums, &c.

EVERY REQUISITE FOR PRACTICAL WORK, also Museum Fittings, Cases, and all Materials for Display, &c., of Specimens,

COLLECTIONS OF MINERALS, FOSSILS, ROCKS, NATURAL CRYSTALS OF MINERALS, to illustrate all Elementary Works. All greatly improved.

NEW LISTS NOW READY.

And may be had post free on application at the Repository and Museum, 88 CHARLOTTE ST., FITZROY SQUARE, LONDON.

MINERALOGY

SAMUEL HENSON,

97 REGENT STREET, LONDON, W. ESTABLISHED 1840.

Late 277 STRAND Choice Mineral Specimens, Gem Stones, Carved Opals, Polished Agates Rock Crystal Balls, Fossils, Rocks, and Rock Sections. LATEST ARRIVALS.

Mr. HENSON has just received some good Groups of Japanese Stibnite, interesting Quartz Crystals inclosing Rutile and other Substances, and a Very Fine Rock Crystal Ball, 4 inches diameter, perfectly free from flaws, small Crystal Balls, with inclosures, Rock Crystal Carvings, &c., &c.; Crystallised Hydrargillite, Bertrandite, Polybasite, Diamonds, Chalcotrichite, Arizona, Yellow Terminated Beryls, Geikielite, and Yttrotantalite. Diatomaceous Earth from Hakodati, Japan.

NOTICE.-Advertisements and business letters for

NATURE should be addressed to the Publishers;
Editorial communications to the Editor. The
telegraphic address of NATURE is “PHUSIS,
LONDON."

SUBSCRIPTIONS TO NATURE."

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FOR ADVERTISEMENTS.

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Money Orders payable to MACMILLAN & CO. OFFICE: 29 BEDFORD STREET, STRAND, W.C.

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