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PEARS' SOAP

Soap.

FOR TOILET AND NURSERY.
Specially Prepared for the delicate skin o
Ladies and Children and others sensitive to th:
weather, winter or summer. Redness,
Roughness, and Chapping prevented.

TESTIMONIALS

SIR ERASMUS WILSON, F.R.S..

Late President of the Royal College of
Surgeons of England,

Writes in the Journal of Cutaners.
Medicine:

"The use of a good Soap is certam calculated to preserve the skin in heale to maintain its complexion and tone, prevent its falling into wrinkles : PEARS is a name engraven on the memor of the oldest inhabitant; and Pears' Tran parent Soap is an article of the nicest a most careful manufacture, and one of the most refreshing and agreeable of balms for the skin."

Mdme. ADELINA PATTI.

"I have found it matchless for hands and complexion."

(Signed)

ADELINA PATTI

MRS. LANGTRY.

"I have much pleasure i stating that I have used y Soap for some time, prefer it to any other."

LILLIE LANGTRY

is SOLD EVERYWHERE in Tablets at is. each. Larger Sizes, ls 6d and 2s. 6d. (The 2s. 6d. Tablet is perfumed with Otto of Roses. A smaller Tablet, unscented, is sold at 6d.; but INSIST on having PEARS', as vilely injurious imitations are often substituted.

Printed by RICHARD CLAY AND SONS, LIMITED, at 7 and 8 Bread Street Hill, Queen Victoria Street, in the City of London, and Published br MACMILLAN AND Co., at the Office, 29 and 30 Bedford Street, Covent Garden.-THURSDAY, January 16, 189

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DEAR SIR,-The Watkin Aneroid only reached me three weeks ago, I am very much pleased with it, and have given it a pretty severe trial with very satisfactory results.

(Signed) R. J. ELLERY.

EDINBURGH, May 31, 89. DEAR SIR.-I have just returned from a six weeks' stay at the Ben Nevis Obervatory, and while there had an opportunity of test

OUR EYES.

Just Published. Eighth Edition. Thirteenth Thousand. Revised
and greatly Enlarged, with many Additional Illustrations.

OUR EYES, and HOW to PRESERVE
THEM FROM INFANCY TO
OLD AGE.

WITH SPECIAL INFORMATION ABOUT SPECTACLES.

ing the admirable qualities By JOHN BROWNING, F.R.A.S., F.R. M.S., &c.

of your new Watkin " Aneroid. The result has been most satisfactory, the extreme error noted being only about 1o of an inch. During my stay at the Observatory the Aneroid was frequently tested by taking it down 2000 feet and then comparing it with the standard on my return. The results obtained speak volumes for the high-class workmanship and great accuracy you have attained in the manufacture of this instrument.

(Signed) R. C. MOSSMAN. F. R. M.S., Observer. Scott. Met. Soc. JJ. HICKS, 8, 9, & 10 HATTON GARDEN, LONDON. The 'STAR MICROSCOPE is a modern marvel at its low price. The lenses alone are worth the money."-British Medical Journal.

NEW

MODEL

With 70 Illustrations. Price 1s., Cloth.

"This little volume should secure a wide circle of readers. We have been specially pleased with the many useful hints given by Mr. Browning regarding sight preservation. The most interesting part of the. book perhaps is that which relates to the choice of spectacles."-Health.

CHATTO & WINDUS, Piccadilly, LONDON, W.,

AND ALL BOOKSELLERS.

Sent free for 1s. 2d. by the Author, JOHN BROWNING, 63 Strand,
London, W.C.

NEGRETTI AND ZAMBRA'S
OPERA, RACE, & FIELD GLASSES

OF EVERY DESCRIPTION.

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made throughout in brass, neatly japanned, and is not only first-rate in optical qualities, but is now a handsome, well finished Instrument.

R. & J. BECK, 68 Cornhill, London, E.C.

Barometers, Microscopes, Telescopes,
Magic Lanterns, &c., &c.

Illustrated Price Lists posted free to all parts of the World.

NEGRETTI & ZAMBRA,

OPTICIANS AND SCIENTIFIC INSTRUMENT MAKERS TO THE QUEEN.
HOLBORN VIADUCT, E.C.

Branches:-45 CORNHILL; 122 REGENT STREET.
Photographers at the CRYSTAL PALACE,

N. & Z.'s Large Illustrated Catalogue, 1200 Engravings, Price 5s. 6d.
Telephone No. 6583. Telegraphic Address: "Negretti, London."

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ROYAL INSTITUTION OF GREAT BRITAIN,

ALBEMARLE STREET, PICCADILLY, W.

Prof. FLOWER, C.B., D.C.L., F.R.S., will on SATURDAY, January 25, at 3 o'clock, begin a Course of Three Lectures on THE NATURAL HISTORY OF THE HORSE AND OF ITS EXTINCT AND EXISTING ALLIES.

Subscription to this Course Half-a-Guinea; to all the Courses in the Season, Two Guineas.

The FRIDAY EVENING MEETINGS will begin TO-MORROW (January 24), at 9 o'clock, when Prof. DEWAR will give a Discourse on THE SCIENTIFIC WORK OF JOULE. To these Meetings Members and their Friends only are admitted.

ST. THOMAS'S HOSPITAL
MEDICAL SCHOOL,

ALBERT EMBANKMENT, LONDON, S.E.

TWO ENTRANCE SCIENCE SCHOLARSHIPS of 125 Guineas and £60 respectively, open to all First-Year Students, will be offered for Competition in SEPTEMBER 1890.

Special Classes are held throughout the Year for the PRELIMINARY SCIENTIFIC and INTERMEDIATE M.B. Examination of the University of London, and may be joined at any time.

Entries may be made to Lectures or Hospital Practice, and Special Arrangements are made for Students entering in their Second or subsequent Years; also for Dental Students and for Qualified Practitioners. Prospectuses and all Particulars may be obtained from the Medical Secretary, Mr. GEORGE RENDLE.

E. NETTLESHIP, Dean.

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LIVING SPECIMENS FOR THE MICROSCOPE.

GOLD MEDAL awarded at the FISHERIES EXHIBITION to THOMAS BOLTON, 83 CAMDen Street, BIRMINGHAM, Who last week sent to his subscribers Argulus foliaceus, with sketch and description. He also sent out Corethra, Trout Ova, Philodina rosentia Floscularia, Corethra plumicornis, Limnias ceratophylli. Melicerta ringet. Stephanoceros; also Amoba, Hydra, Vorticella, Crayfish, Dog-Fan Amphioxus, and other Specimens for Biological Laboratory work. Weekly Announcements will be made in this place of organisms T B is supplying.

Specimen Tube, One Shilling, post free. Twenty-six Tubes in Course of Six Months for Subscription of £x 11., or Twelve Tubes for 10s. 6d.

Portfolio of Drawings, Eleven Parts, 1s. each.

J. T. CROCKETT,

Maker of every description of Entomological Cabinets and Apparam Store- and Book-boxes, fitted with Camphor-cells; Setting Boards, (val ur Flat, &c. Cabinets of every description kept in stock. SPECIAL INSECT CABINETS, with Drawers fitted with Glass Tops and Bottoms to show upper and under side without removing insect. Store-boxes specially made for Continental Setting, highly recommended for Beetles. All best WOTE Lowest possible terms for cash. Prices on Application. Estimates supplied Trade supplied. Established since 1847.

Show Rooms-7A Prince's Street, Cavendish Square, W. (7 doors from Oxford Circus. Factories-34 Ridinghouse Street, and Ogle Street, W.

HENRY EBBAGE,

344 CALEDONIAN ROAD, LONDON. MICROSCOPIC OBJECTS, Gorgeous Polarizing, Brilliant Opaque anu Entertaining Slides, 3 X 1, suitable for Evening Exhibition. 5. Dos Four Dozen Slides sent, carefully packed and Postage paid, for 211., t Australian Colonies, Belgium, Canada, France, Germany, India, N-w Zealand, South Africa, &c. Microscopes, Mounting Apparatus, and a requisites supplied.

Catalogue free to all Parts.

TO SCIENCE LECTURERS.

See Mr. HUGHES'S PATENT COMBINATION OPTICAL LANTERN, used by W. LANT CARPENTER, Esq., Prof. FORBES, B. J. MALLEY, Esq. New Oxyhydrogen Microscope. Grand Results. Docwra Imp Prize Medal, Highest Award. Patent Pamphagos Lantern Science Lecture Sets. Novelties Cheapest and Best. Elaborately Illustrated Catalog 300 Pages, 1s.; Postage, 5d. Smaller do., 6d. Pamphlets Free. HUGHES, Specialist, Brewster House, Mortimer Road, Kingsland, N.

ICELAND SPAR.

A whole lot of Iceland Spar, for Opticians' use, is for Sale by
I. SALOMON,

BREDGADE 20, COPENHAGEN, DENMARK.
English Correspondence.

SILVERED-GLASS REFLECTING

TELESCOPES.

CALVER'S well-known TELESCOPES received the Highest Award for "Excellence and Improvements" at the International Exhibition, London Catalogues and Testimonials, 15.-G. CALVER, F.R.A.S., Widder, Chelmsford.

ROCK SECTIONS CUTTING MACHINES Prize Medal awarded by the Jury of the late Exhibition of Inventions. PRICE £5.

Sole Makers

CUTTELL, 47 Rathbone Place, Oxford Street.

MANUSCRIPT COPYING

By Typewriter. Special attention given to Papers on Technical Subjects
for Public Reading.
Price, 1s. 3d. per 1000 Words. Manifold Copies, 15. per 1000 Words.
STANDARD TYPEWRITING CO., 90 & 91 Queen St. (third floor), E.C.

OSTEOLOGICAL SPECIMENS,

MODELS, &c.-MOORE BROS., 49 Hardman Street, Liverpool Price List, Three Stamps.

Sale by Auction.

MONDAY, JANUARY 27.

NATURAL HISTORY SPECIMENS.

Mr. J. C. STEVENS will Sell by Auction,

at his Great Rooms, 38 King Street, Covent Garden, on MONDAY, JANUARY 27, at half-past 12 precisely, several Consignments of Exotic Lepidoptera and other Insects, received direct, British Lepidoptera, Shells, Birds' Eggs, very Handsome Case of Stuffed Birds, and other Natural History Specimens, some Valuable Entomological Books, Cabinets, &c.

On View Saturday prior from 10 to 4, and Morning of Sale, and

Catalogues had.

MINERALOGY.

SAMUEL HENSON,

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Late 277 STRAND. CHEMICAL & PHILOSOPHICAL APPARATUS.

97 REGENT STREET, LONDON, W. ESTABLISHED 1840.

VERY FINE CRYSTALLIZED GOLD NUGGETS FROM JOHANNESBURG, WEIGHING I TO 15 OZS., ALSO THE NEW MINERALS EUDIDYMITE, KOKKULITE, BERYLLONITE, SPERRYLITE, ARGYRODITE.

A Large Assortment of Beautiful Specimens, very suitable for Presents, from all Prices. Inspection invited.

COLLECTIONS FOR STUDENTS AND PROSPECTORS.

Blowpipe Apparatus, &c., &c.
PRECIOUS STONES.

Lessons given.

Catalogue Free.

F. H. BUTLER, M.A. Oxon., A.R.S. Mines, &c.,

NATURAL HISTORY AGENCY,

148 BROMPTON ROAD, LONDON, S. W.,
Near the British Natural History Museum.

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English and Foreign Rocks, Minerals, Fossils, Shells, and other THOMAS D. RUSSELL,

Objects of Natural History.

A large series of interesting rocks now in stock from remote localities in the Highlands, including "Haggis" rock, Canisp Porphyry, and Archæan krite and Peridotite; also numerous micro-sections of little-known rocks from Cornwall and elsewhere, well crystallized Pajsbergite, Brandtite, Valuente, and Braunite; exceptionally fine polished Bloodstone, Cinnabar from the Avala Mine. Servia; Lancashire ferruginous calcite (the largest as yet raised), and Brazilian Rock-crystals. Among the recent acquisitions in fts are specimens from the Caradoc of the Onny River, and rare Devonian

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MINERALOGY AND GEOLOGY.

SPECIAL AND TYPICAL COLLECTIONS FOR STUDENTS,
LECTURERS, AND MUSEUMS.

EVERY REQUISITE FOR PRACTICAL WORK, CABINETS,
CASES, APPARATUS OF ALL KINDS.
The Largest Stock in England of Rocks, Rock-Sections,
Minerals, Fossils.

New Catalogues and Lists now ready, Free, of

JAMES R. GREGORY,

88 CHARLOTTE STREET, FITZROY SQUARE, LONDON. WEAK AND DEFECTIVE SIGHT.SPECTACLES scientifically adapted to remedy impaired vision by Mr. ACKLAND, Surgeon, daily, at HORNE AND THORNTHWAITE'S, Opticians to the Queen, 416 Strand, London. The weak-sighted should read Ackland's "Hints on Spectacles." 6d., post free.

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PRIZE MEDALLIST, HEALTH EXHIBITION, 78 NEWGATE STREET, LONDON, E.C.

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ROYAL STATISTICAL SOCIETY'S

JOURNAL.

Now Ready, Part IV., Vol. LII., December 1889, Price 55.

CONTENTS.

The Opening Address of the President, Dr. T. GRAHAM BALFOUR, F.R.S., &c., Session 1889-90.

"On the Application of Mathematics to Political Economy." The Address of the President of Section F of the British Association, at Newcastle-uponTyne, in September 1889. By Prof. F. Y. EDGEWORTH, M. A., D. C. L. Miscellanea :

(1) The International Monetary Congress of 1889. By ADOLPHE COSTE. (A Translation.) (2) Public Sympathy . Political Economy. (3) Directors of Joint Stock Companies. (4) Notes on Economical and Statistical Works. (5) Quarterly List of Additions to the Library.

Index to Vol. LII. (1889); also

Appendix, containing List of Members, Bye-laws, &c.

London: E. STANFORD, 26 and 27 Cockspur Street, Charing Cross, S. W.

WILLIAM WESLEY AND SON,

Scientific Booksellers and Publishers,

28 ESSEX STREET, STRAND, LONDON. The following recently-published

NATURAL HISTORY AND SCIENTIFIC BOOK CIRCULARS include a portion of their stock :

No. 97. ICHTHYOLOGY; Reptilia and Amphibia; General Zoology, including Ancient Works, Biographies, Classification, Darwinism Manuals, Periodicals, Transactions of Societies; Anatomy, Physiology and Embryology. Price 4d.

EDWARD STANFORD'S PUBLICATIONS.

Now Ready, at the Libraries and Booksellers

A TRIP THROUGH THE EASTERN CAUCASUS, with a Chapter on the Languages of the Country By the Hon. JOHN ABERCROMBY, Demy 8vo, Cloth, with Maps and Illustrations, 145.

THE SCIENCE OF METROLOGY; or NATURAL WEIGHTS and MEASURES. A Challenge to the Metric System. By the Hon. E NOEL, Captain, Rifle Briga iz Demy 8vo, Cloth. with Folding Plate, 2s. 6d.

"A substantial contribution to the discussion of the subject.”—S; +ismon The QUESTION of the DAY in AFRICA. NYASSALAND: Britain's

Great

Case against Portugal. ["Brag is a good dog, but Hold-fast is a better.") By Rev. HORACE WALLER, F.R.G.S. 68 pp., Demy Evo, with 2 Maps, in Wrapper, 1s.; Post, 13. ad.

Just Published, Third Edition, Revised and Enlarged. STANFORD'S LONDON ATLAS OF UNIVERSAL GEOGRAPHY. Quarto Edition. Containing 46 Cola Maps, corrected to show the Latest Changes, and presenting also the leading Physical Features. An Alphabetical Index to the Geographs of the World is included. Half-morocco, Cloth Sides, Gilt Edges CHARTS of the CONSTELLATIONS, from the North Pole to between 35 and 40 Degrees of South Declination B ARTHUR COTTAM, F.RA.S. 36 Charts, each 30 inches by printed on Drawing Paper, and supplied in a Portfolio Price £2 an per Set. After 200 Sets have been sold, the Price will be raised to £57 Detailed Prospectus, with Specimen Chart, free on application.

Just Published, in a Neat Cloth Box, Lettered, 315. 6d. THE FAIRYLAND OF SCIENCE

LI Co

BRARY. By ARABELLA B. BUCKLEY (Mrs. FISHER). sisting of Miss Buckley's Four Popular Books. in a Uniform Bindi Roxburgh Style. The Volumes of this Set are not sold separately CONTENTS: 1. The Fairyland of Science.-2. Life and her Childre3. Winners in Life's Race.-4. Short History of Natural Science.

It.

N. 98. ORNITHOLOGY; Local and British Ornithological Faunas;
Foreign and Exotic Ornithological Faunas; Cage Birds and Poultry MADEIRA: its Scenery, and how to See
Ornithological Monographs; Periodicals and Systematic Works.
MAMMALIA; including Cetacea, Sirenia, and Pinnipedia.
FAUNAS AND GEOGRAPHY of Great Britain and Ireland,
Continental Europe, Africa. America, Arctic Regions, Asia, Austral-
asia. ZOOLOGICAL VOYAGES. Over 1000 Works. Price 4d.

With Letters of a Year's Residence, and Lists of the Trees, Flowery Ferns, and Seaweeds. By ELLEN M. TAYLOR. With Frunt. piece, Map of the Island, and Plan of Funchal. Second Edition, Re vised, Crown 8vo, Cloth, 7s. 6d.

London: EDWARD STANFORD, 26 and 27 Cockspur Street, SW

W. WESLEY & SON, 28 Essex Street, Strand, London. WALTER SCOTT'S LIST.

Now Ready.

THE FAUNA OF BRITISH INDIA, in

Crown 8vo, Cloth. Price 38. 6d. per Vol.; Half Morocco, бu.

cluding Ceylon and Burmah. Published under the authority of the THE CONTEMPORARY SCIENCE SERIES.

Secretary of State for India in Council. Edited by W. T. BLAN-
FORD.

MAMMALIA. By W. T. BLANFORD, F.R.S. Part I., Medium 8vo,
Paper Covers, pp. i.-xii., 1-250, and 71 Woodcuts, Price 10s.
FISHES. By F. DAY, C.I.E., LL.D. Vol. I., Medium 8vo, Cloth,
Lettered, &c., pp. i-xviii., 1-548, and 164 Woodcuts, Price £1.
FISHES. Vol. II., pp. i.-xiv., 1-510, and 177 Woodcuts, Price £1.
BIRDS. By EUGENE W. OATES, F.Z.S. Vol. I., Medium 8vo, Cloth,
Lettered, &c., pp. i.-xx., 1-556, and 163 Woodcuts, Price £1.

London: TAYLOR & FRANCIS, Red Lion Court, Fleet Street.

Cal

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PATRICK GEDDES and J. ARTHUR THOMSON.
Illustrations and 322 pages.

"A work which, for range and grasp, mastery of material, originalty. and incisiveness of style and treatment, is not readily to be matched in the long list of modern books designed more or less to popularize science. Scottish Leader.

cutta: THACKER, SPINK, & CO. Bombay: THACKER & CO., ELECTRICITY IN MODERN LIFE. By

Limited. Berlin: R. FRIEDLÄNDER UND SOHN, Carlstrasse 11.

R. FRIEDLÄNDER & SOHN, Berlin N. W., Carlstrasse 11.

Just Published, OUR NEW CATALOGUE OF LITERATURE on

ANATOMY & PHYSIOLOGY OF PLANTS.

G. W. DE TUNZELMANN. With 88 Illustrations. "An interesting account of the most recent developments of the practi-zi applications of electricity to the every-day business of life-not in commerc only, as in the telephone, but in medicine and in war, for example. The work is well illustrated."-Scotsman.

THE ORIGIN OF THE ARYANS. By
Dr. ISAAC TAYLOR. With numerous Illustrations.
TO BE FOLLOWED BY

82 Pages in Royal Octavo, with 3310 Titles of Books, Periodicals, Memoirs, PHYSIOGNOMY AND EXPRESSION.

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