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Pears

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Soap

FOR TOILET AND NURSERY
Specially Prepared for the delicate skin
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

Surgeons of England, Writes in the Journal of Cuctancia

Medicine : “The use of a good Soap is certas calculated to preserve the skin in heals to maintain its complexion and tones! prevent its falling into wrinkles : PEARS is a name engraven on the mean of the oldest inhabitant ; and Pears' Treo parent Soap is an article of the nicest most careful manufacture, and one of the most refreshing and agreeable of balus ir the skin.”

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Mdme. ADELINA PATTI.

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

(Signal)

ADELINA PATTI

YOU DIRTY BOY!

MRS. LANGTRY.

“ I have much plessure stating that I have usein

Soap for some time, FCCARD

prefer it to any other. (Signed)

LILLIE LANGTRI is SOLD EVERYWHERE in Tablets at 1s. each. " Larger Sizes, ls 6d and 2s.6d. (The 2s. 6. Tablet is perfumed with Otto of Roses.) 4 smaller Tablet, unscented, is sold at 6d.; but INSIST on haring

PEARS', as vilely injurious imitations are often substituted. Prin:ed by Richard CLAY AND Sons, LIMITED, at 7 and 8 Bread Street Hill, Queen Victoria Street, in the City of London, and Publisher

MACMILLAN ANI) Co., at the Office, 29 and 30 Bedford Street, Covent Garden.—THURSDAY, January 16, r@ge.

PEARS' SOAP

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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. 1056, VOL. 41.]

THURSDAY, JANUARY 23, 1890.

[PRICE SIXPENCE.

OUR EYES.

Registered as a Newspaper at the General Post Office.]

(All Rights are Reserved THE NEW PATENT WATKIN ANEROID BAROMETER Sow

Amongst several unsolicited Testimonials

the two following have been received by the FLAT Watch

maker :Sae

THE OBSERVATORY, MELBOURNE,

October 10, 1888.
Dear Sir,—The Watkin Aneroid Just Published. Eighth Edition. Thirteen!h Thousand. Revised
only reached me three weeks ago, and greatly Enlarged, with many Additional Illustrations.

I am very much pleased
with it, and have given it a
pretty severe trial with very

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OATENT

WATHI

OUR EYES, and HOW to PRESERVE satisfactory results.

(Signed) R. J. ELLERY. THEM FROM INFANCY TO
EDINBURGH, May 31,'89.

OLD AGE,
Dear Sir, I have just
J. HICKS,

returned from a six weeks'
stay at the Ben Nevis Ob-

WITH SPECIAL INFORMATION ABOUT SPECTACLES.
ervatory, and while there
mas the opportunity of lies By JOHN BROWNING, F.R.A.S., F.R.M.S., &c.
of your new “Watkin"
Aneroid. The result has

With 70 Illustrations. Price 18., Cloth.
been most satisfactory, the
extreme error noted being

"This little volume should secure a wide circle of readers. We have been only about do of an inch.

specially pleased with the many useful hints given by Mr. Browning regardDuring my stay at the Ob.

ing sight preservation. The most interesting part of the book perhaps is servatory the Aneroid was fre

that which relates to the choice of spectacles." —Health.
quently tested by taking it down
2000 feet and then comparing it
with the standard on my return.

CHATTO & WINDUS, Piccadilly, LONDON, W., The results obtained speak volumes for the high-class workmanship and great

AND ALL BOOKSELLERS. caracy you have attained in the manufacture of this instrument. Signed) R. C. Mossmax. F.R.M.S., Observer. Scott. Met. Soc.

Sent free for Is. 2d. by the Author, John BROWNING, 63 Strand, J. HICKS, 8, 9, & 10 HATTON GARDEN, LONDON.

London, W.c.
"The 'STAR' MICROSCOPE is a modern marvel at its low price.
The lenses alone are worth the money."
—British Medical Journal

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

OF EVERY DESCRIPTION.

MAKER

NOONEY

BECK'S

£2 2s. to £5 5s.

MENT

Is made throughout in brass, Deatly japanned, and is not only first-rate in optical qualities, but is now a handsome, wall famshed Instrument.

MODEL

"STAR" MICROSCOPE

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 THÍ QUEEN.

HOL BORN VIADUCT, E.C.
Branches:-45 CORNHILL; 122 REGENT STREET.

Photographers at the CRYSTAL PALACE,
N. & Z.'s Large Illustrated Catalogue, 1200 Engravings, Price 55. 6d.
Telephone No. 6583. Telegraphic Address : "Negretti, London."

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

CITY AND GUILDS OF LONDON LIVING SPECIMENS FOR THE MICROSCOPE, INSTITUTE for the ADVANCEMENT

GOLD MEDAL awarded at the FISHERIES EXHIBITION to OF TECHNICAL EDUCATION.

THOMAS BOLTON, 83 CAMDEN STREET, BIRMINGHAM, CENTRAL INSTITUTION.

Who last week sent to his subscribers Argulus foliacets, with sketch an! A Course of Ten Lectures on METHODS of ANALYSIS as Applied description. He also sent out Corethra, Trout Ova. Philodine postala to the CONSTITUTION of CARBON COMPOUNDS, will be delivered

Floscularia, Corethra plumicornis, Limnias ceratophylli

. Melicerta ringtas by Prof. H. E. ARMSTRONG, F.R.S., on MONDAYS, at 4.30 p.m., Stephanoceros; also Amoeba, Hydra, Vorticella, Crayfish, Deg Fish, commencing January 27.

Amphioxus, and other Specimens for Biological Laboratory work. Mr. HOLLAND CROMPTON will deliver a COURSE of Ten Lectures Weekly Announcements will be made in this place of organisms T. B. on The THEORY of ELECTROLYSIS and the NATURE of CHEMI. is supplying. CAL CHANGE in SOLUTION, on FRIDAYS, at 4.30 p. m., commencing January 24.

Specimen Tube, One Shilling, post free. Fee for each Course ros. Particulars of and Tickets for the

Courses may be obtained on application Twenty-six Tubes in Course of Six Months for Subscription of £r lig to the Dean, Central Institution, Exhibition Road, S.W.

or Twelve Tubes for 1os. 6d. WALTERT PRIDEAUX, ) Secretaries

Portfolio of Drawings, Eleven Parts, is. each.

J. T. CROCKETT, ROYAL INSTITUTION OF GREAT

Maker of every description of Entomological Cabinets and Apparanas, BRITAIN,

Store- and Book.boxes, fitted with Camphor-cells; Setting Boards, Oval o

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CABINETS, with

Drawers fitted with Glass Tops and Bottoms to show

upper and under side without removing insect. Store-boxes specially made Prof. FLOWER, C.B., D.C.L., F.R.S., will on SATURDAY, January

for Continental Setting, highly recommended for Beetles. All best ok. 25, at 3 o'clock, begin a Course of Three Lectures on THE NATURAL HISTORY OF THE HORSE AND OF ITS EXTINCT AND EXIST- | Trade supplied. Established since 1847

Lowest possible terms for cash. Prices on Application. Estimates supplied ING ALLIES.

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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

HENRY EBBAGE, and their Friends only are admitted.

344 CALEDONIAN ROAD, LONDON,

MICROSCOPIC OBJECTS, Gorgeous Polarizing, Brilliant Opaque and ST. THOMAS'S HOSPITAL

Entertaining Slides, 3 X 1, suitable for Evening Exhibition. 5. Doman MEDICAL SCHOOL,

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Australian Colonies, Belgium, Canada, France, Germany, India, Nor ALBERT EMBANKMENT, LONDON, S.E.

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requisites supplied. TWO ENTRANCE SCIENCE SCHOLARSHIPS of 125 Guineas and

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Special Classes are held throughout the Year for the PRELIMINARY SCIENTIFIC and INTERMEDIATE M.B. Examination of the Uni

TO SCIENCE LECTURERS. versity of London, and may be joined at any time. Entries may be made to Lectures or Hospital Practice, and Special TERN, used by W. LANT CARPENTER, Esq., Prof. FORBES, B. J. MALDEN

See Mr. HUGHES'S PATENT COMBINATION OPTICAL LAN. Arrangements are made for Students entering in their Second or subsequent Years; also for Dental Students and for Qualified Practitioners.

Esq. New Oxyhydrogen Microscope. Grand Results. Docwra Imple Prospectuses and all Particulars may be obtained from the Medical

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THE AGRICULTURAL COLLEGE,

ASPATRIA.

PRINCIPAL-DR. H. J. WEBB, B.Sc. Thorough practical and scientific Training in Agriculture, Preparation for the Colonies. Students gained the First, Third, and Fourth Scholarships of the Royal Agricultural Society, 1888.

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
LECTURE DIAGRAMS.

TELESCOPES.
Drawings Copied or Enlarged in Outline or Colour on Glazed Cloth.-
Apply “ ALPHA,” Baltonsborough,
Bridgwater.

CALVER'S well-known TELESCOPES received the Highest Award for "Excellence and Improvements" at the International Exhibition, Landus Catalogues and Testimonials, 1s.-G. CALVER, F.R.A.S. Wadford

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A SCIENCE LECTURER wanted at once

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Chemistry, Botany, Geology, and Biology Stipend about 4150, ROCK SECTIONS CUTTING MACHINES
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Prize Medal awarded by the Jury of the late Exhibition of Inventions

PRICE 65. EXAMINATIONS.- THOROUGH PRE

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CUTTELL, 47 Rathbone Place, Oxford Street. Science, Prelim. Sci., &c. Special facilities for practical work in Biology.--"PRACTICAL," 27 Chancery Lane.

MANUSCRIPT COPYING AN EXPERIENCED MICROSCOPIST. By Typewriter. Special attention given to Papers on Technical Subjects

M.A., Cambridge, who has at present time to spare, would UNDER-
TAKE SKETCHING from MICROSCOPE.- MICROSCOPE, Mr.

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STANDARD TYPEWRITING CO., 90 & Queen St. (third floor) E.C. DIAGRAMS FOR BOTANICAL LEC-OSTEOLOGICAL SPECIMENS, TURES executed by Mrs. BAKER, Thirsk, who holds a Teacher's

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Price List, Three Stamps.

JOHN J. GRIFFIN & SONS, LIMITED,

Sale by Auction.

BEST BLACK INK KNOWN.

DRAPER'S INK (DICHROIC).
MONDAY, JANUARY 27.

DIFFERING FROM ANYTHING ELSE EVER PRODUCED.
NATURAL HISTORY SPECIMENS.

Writing becomes a pleasure when this Ink is used. It has been adopted in Mr. J. C. STEVENS will Sell by Auction, the principal Banks, Public Offices, and Railway Companies throughout

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at hus Great Rooms. 38 King Street, Covent Garden, on MONDAY,
JANUARY 27, at half past 12 precisely, several Consignments of Exotic It writes almost instantly full black. | Flows easily from the Pen.
Lepidoptera and other Insects, received direct, British Lepidoptera, Does not corrode Steel Pens.

Blotting-paper may be applied at the
Shells, Birds' Eggs, very Handsome Case of Stuffed Birds, and other Is cleanly to use, and not liable to Blot. moment of writing.
Natural History Specimens, some Valuable Entomological Books,
Cabinets, &c.

Can be obtained in London, through Messrs. BARCLAY & Sons, Farring.

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Catalogues had.

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MINERALOGY.
SAMUEL HENSON,

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

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, ValuJente, and Braunite: exceptionally fine polished Bloodstone, Cinnabar žua the Avala Mine, Servia ; Lancashire ferruginous calcite (the largest as pet raised), and Brazilian Rock-crystals. Among the recent acquisitions in Inseks are specimens from the Caradoc of the Oany River, and rare Devonian

MINERALOGY AND GEOLOGY.
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EVERY REQUISITE FOR PRACTICAL WORK, CABINETS,

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WEAK AND DEFECTIVE SIGHT.-

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ROYAL STATISTICAL SOCIETY'S EDWARD STANFORD'S PUBLICATIONS. JOURNAL

Now

Ready, at the Libraries and Booksellers Now Ready, Part IV., Vol. LII., December 1889, Price 55. A TRIP

CAUCASUS, with a Chapter on the Languages of the Country By CONTENTS.

the Hon. JOHN ABERCROMBY. Demy Svo, Cloth, with Maps and The Opening Address of the President, Dr. T. GRAHAM BALFOUR, Illustrations, 145. F.R.S., &c., Session 1889-90.

On the Application of Mathematics to Political Economy.” The Address THE SCIENCE OF METROLOGY; or of the President of Section F of the British Association, at Newcastle-upon NATURAL WEIGHTS and MEASURES. A Challenge to the Tyne, in September 1889. By Prof. F. Y. EDGEWORTH, M.A., D.C.L.

Metric System. By the Hon. E NOEL Captain, Rifle Brigale Miscellanea :

Demy 8vo, Cloth, with Folding Plate, 28. 68.

"A substantial contribution to the discussion of the subject."-Srss (1) The International Monetary Congress of 1889. By ADOLPHE COSTE. (A Translation.) (2) Public Sympathy v. Political Economy. (3) Directors

The QUESTION of the DAY in AFRICA. of Joint Stock Companies. (4) Notes on Economical and Statistical Works. NYASSALAND: Great Britain's Case (5) Quarterly List of Additions to the Library.

against Portugal. ["Brag is a good dog, but Hold-fast is a better? Index to Vol. LII. (1889); also

By Rev. HORACE WALLER, F.R.G.S. 68 pp. Demy Eva, rus Appendix, containing List of Members, Bye-laws, &c.

2 Maps, in Wrapper, 13.; Post, 18. ad. London : E. STANFORD, 26 and 27 Cockspur Street, Charing Cross, S.W.

Just Published, Third Edition, Revised and Enlarged. STANFORD'S LONDON ATLAS OF

UNIVERSAL GEOGRAPHY, Quarto Edition. Containing 45 Cohere WILLIAM WESLEY AND SON, Maps, corrected to show the Latest Changes, and presenting alone

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the North Pole to between 35 and 40 Degrees of South Declination By ARTHUR COTTAM, FRA.S. 36 Charts, each 30 inches by a printed on Drawing Paper,

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THE FAIRYLAND OF SCIENCE LIinclude a portion of their stock :

BRARY. By ARABELLA B. BUCKLEY (Mrs. FISHER. Cos No. 97.-ICHTHYOLOGY ; Reptilia and Amphibia ; General Zoology, sisting of Miss Buckley's Four Popular Books, in a Uniforme Binding

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long list of modern books designed more or less to popularize science"

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cutta: THACKER, SPINK, & co. Bombay: THACKER & Co., ELECTRICITY IN MODERN LIFE. By Limited. Berlin : R. FRIEDLÄNDER UND SOHN, Carlstrasse 1, G. W. DE TUNZELMANN. With 88 Illustrations.

"An interesting account of the most recent developments of the practica R. FRIEDLÄNDER & SOHN, Berlin N. W., Carlstrasse 11.

applications of electricity to the every-day business of life not in commer only, as in the telephone, but in medicine and in :war, for example. The

work is well illustrated."-Scotsman. Just Published, our New CATALOGUE OF LITERATURE ON

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PHYSIOLOGY,
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