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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. 1064, VOL. 41.]

THURSDAY, MARCH 20, 1890.

[PRICE SIXPENCE.

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[All Rights are Reserved. THE NEW PATENT WATKIN ANEROID BAROMETER.

THE Son WADE

Amongst several unsolicited Testimonials

the two following have been received by the RAIN-BAND SPECTROSCOPE. TL WATCH Size

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BATENG

THE OBSERVATORY, MELBOURNE,

October 10, 1888.
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

John Browning

des Strand LONDON
satisfactory results.
(Signed) R. J. ELLERY,
EDINBURGH, May 31,'89.
DEAR SIR,- I have just
returned from a six weeks'

MR. JOHN BROWNING begs to direct attention to the
J. HICKS,
stay at the Ben Nevis Ob.

advantages of this very powerfal, portable, and efficient Instruservatory, and while there

ment, which will divide the Sodium lines or the D lines in the ing the admirable qualities Solar Spectrum, and show the Rain-Band as Separate Lines;

it
of your new “Watkin" is provided with a fine motion focusing arrangement, and it is
Aneroid.. The result has applicable to every purpose for which a Direct Vision Spectro-
been most satisfactory, the
extreme error noted being

scope can be used.
only about do of an inch.
During my stay at the Ob-

Price, in Morocco Leather Case, £3 8s. 6d.
servatory the Aneroid was fre-
quently tested by taking it down

New Illustrated Catalogue of Spectroscopes sent post free. 2000 feet and then comparing it

with the standard on my return. The results obtained speak volumes for the high-class workmanship and great

JOHN BROWNING, mccuracy you have attained in the manufacture of this instrument.

Optical and Physical Instrument Maker to H.M. Government, Signed) R. C. MOSSMAN, F.R.M.S., Observer. Scott. Met. Soc. J. J. HICKS, 8, 9, & 10 HATTON GARDEN, LONDON. 63 STRAND, LONDON, W.C.

The "STAR" MICROSCOPB is a modern marvel at its low price. The lenses alone are worth the money."-British Medical Journal.

WATHIN

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LONDON

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IS made through out in brass, neatly-japanned, and is not only first-rate in optical qualities, but is now a handsome,

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NEGRETTI AND ZAMBRA'make a Speciality of Spectacles for

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SCIENCE AND ART EXAMINATIONS,

1890.

5th May, Monday
6th , Tuesday

ART.
7 to 8 p.m. Model Drawing (2nd Grade Examination).
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SCIENCE.

P.M.
7 to 10

VI.-Theoretical Mechanics.
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11.-Machine Construction and Drawing.
III.-Building Construction,

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XXIV.-Principles of Agriculture. 7 to 10.30 V.-Mathematics, Stages 1, 2, and 3. 7 to 10 IX.-Magnetism and Electricity (including Alternative

Elementary Physics).

VIII.-Sound, Light, and Heat. 6 to 10

1.-Practical Plane and Solid Geometry.

XX.--Navigation. 7 to 10

XII.—Geology.

V.-Mathematics, Stages 4 and 5.
XXV.-Hygiene.
XVI. and XVII.---Biology.
XIX.-Metallurgy.
X.-Inorganic Chemistry (including Alternative

Elementary Chemistry).
XV.-Botany.
XIII.-Mineralogy.
XXI.–Nautical Astronomy.

XI.--Organic Chemistry.
XXII.-Steam.

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Candidates who do not belong to any regularly constituted Science or Art Class should apply before March 25 to the Specna! Local Secretary of the district, or, in case they do not reside within a Special Local Secretary's district, to the Secretary of tko nearest Class which is to be examined in the subject they require. A fee for each Candidate, not exceeding 25. 6. par evening, may be charged by the Local Committee, or the Special Local Secretary. The Special Local Secretaries for the London districts are as follows :-Chelsea and Westminster, J. R. Langler, Esq., 130 Horseferry Road, Westminster, S.W.; City (Ex and Hackney, F. E. Harding, Esq., Murton House, Higham Road, Woodford Green, Essex ; City (West) and Finsbury, W. H. Congreve, Esq., Birkbeck Institution, Bream's Buildings, Chancery Lane, E.C.; Greenwich and Deptford, J. J. Pakes Esq., 10 Malpas Road, Brockley, S.E. ; Lambeth (East), and Lambeth (West), F. Dugard, Esq., 3 Sibella Road, Claphas, S.W. ; Marylebone, F. Pope, Esq., 18 Baker Street, Portman Square, W. ; Southwark and Lambeth (North), A. Bourne, Es. 38 Stockwell Park Road, Stockwell, S. W. ; Tower Hamlets, E. J. Sharpe, Esq., 30 Powerscroft Road, Lower Clapton, N.E. Woolwich and Plumstead, R. T. Smith, Esq., 246 Burrage Road, Plumstead, Woolwich; Stratford, J. Hort, Esq., 72 Chobhan Road, Stratford, E. ; Tottenham and Wood Green, J. F. Adams, Esq., Coombe's Croft House, Tottenham.

Individual Candidates who do not reside near any place where a Local Examination Committee has been formed may be examined in all Science and Art Subjects at the South Kensington Museum, as far as room will allow. A Registration Fee ni 25. 6d. per evening, or a Composition Fee of ios. for any number of evenings, will be charged if application (on Form No. 335) is made before March 25, and of 55. per evening, or a Composition Fee of 20s. for any number of evenings afterwards, if made before April 20. Applications for examination at South Kensington cannot be received after April 20.

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LIVING SPECIMENS FOR THE MICROSCOPE.

THE MASON SCIENCE COLLEGE,

BIRMINGHAM. GOLD MEDAL awarded at the FISHERIES EXHIBITION to

APPOINTMENT OF DEMONSTRATOR IN THOMAS BOLTON, 83 CAMDEN STREET, BIRMINGHAM,

CHEMICAL DEPARTMENT. Who last weck sent to his subscribers Chætophora elegans, with sketch and description. He also sent out Lophopus crystallinus, Argulus foliaceus, The Council invite applications, on or before MARCH 27, 1890, for the Corethra, Trout Ova, Philodina roseola, Floscularia, Corethra plumicornis, above Appointment. Melicerta ringens, Stephanoceros; also Amoeba, Hydra, Vorticella, Crayfish,

The duties will commence on TUESDAY, April 22, 1890. Dog-Fish, Amphioxus, and other Specimens for Biological Laboratory work

Particulars of the stipend, conditions, and duties, will be sent on applicaWeekly Announcements will be made in this place of organisms T. B.

tion to the Secretary, Mr. G. H. MORLEY, The Mason Science College, is supplying.

Birmingham, to whom all applications for the appointment should be sent.

LAWSON TAIT, Specimen Tube, One Shilling, post free.

President of the Council. Twenty-six Tubes in Course of Six Months for Subscription of 41 15., or Twelve Tubes for tos. 6d.

ROYAL COLLEGE OF PHYSICIANS,
Portfolio of Drawings, Eleven Parts, Is. each.

EDINBURGH.
Sale by Auction.

The Post of SUPERINTENDENT of the RESEARCH LABORA-
TORY is now Vacant by the Resignation of Dr. WOODHEAD.

The Salary is £200 per Annum, and the hours of attendance required are MONDAY, MARCH 24.

from 10 a.m, to 5 p.m. FALUABLE COLLECTION OF BRITISH LEPIDOPTERA, &c. Applications are to be addressed to the SECRETARY of the College on

or before MARCH 31. MR. J. C. STEVENS will Sell by Auction Further particulars may be obtained on application to Dr. TUKE, Curator

at his Great Rooms, 38 King Street, Covent Garden, on MONDAY, of Laboratory, 7 Lauriston Lane, Edinburgh. MARCH 24, at half-past 12 precisely, a Valuable Collection of British Lepidoptera, containing Authentic Specimens of P. Daplidice, V. UNIVERSITY COLLEGE, LONDON. Antiopa, P. Dispar (several), L. Acis, G. Subrosea, C. Fraxini, and many fine Varieties, including Black' Sibylla, also a magnificent

FACULTY OF MEDICINE. Drawer Mahogany Cabinet of the very best make, in which the above are contained. Some very Rare Micro-Lepidoptera from the

The Classes re-commence on MAY 1, and are so arranged as to afford Fens, &c. &c.

a convenient opportunity for Students to commence their Medical Course. On View Saturday prior from 10 to 4, and Morning of Sale, and Catalogues Street, W.C.

Full information may be obtained from the Office of the College, Gower had.

JOHN WILLIAMS, M.D., Dean.

J. M. HORSBURGH, M.A., Secretary. NATURAL SCIENCE SCHOLARSHIPS AND EXHIBITION.

ST. MARY'S HOSPITAL MEDICAL (1) Ån EXAMINATION will be holden at MERTON COLLEGE,

SCHOOL, OXFORD, beginning on TUESDAY, JULY 1, 1890, for the purpose of electing to Three Open Natural Science Scholarships, of which one will be

PADDINGTON, W. at Merton College, one at New College, and one at Corpus Christi College; Applications are invited before MARCH 28, with Three Recent Testiand to one Exhibition at Merton College.

monials, for the post of DEMONSTRATOR of CHEMISTRY and (3) The Scholarships are all of the value of £80 per annum, and are open to all Candidates whose age on July 7, 1890, will not exceed nineteen

ASSISTANT-LECTURER on PHYSICS. Salary, £100. years

FREDERIC H. MADDEN, School Secretary. The Exhibition is of the value of £60 per annum, and is open, withJut limitation of age, to Candidates who are in need of assistance at the University.

THE AGRICULTURAL COLLEGE, (6) The Subjects of Examination will be: (1) Chemistry, Mechanics, and

ASPATRIA. Physics: () Biology: All Candidates in Biology will be required to show some acquaintance with Chemistry, Mechanics, and Physics.

PRINCIPAL-DR. H. J. WEBB, B.Sc. An English Essay; a Paper in Algebra and Elementary Geometry; and, of necessary, an Elementary Classical Paper, will also be set to all Can

Thorough practical and scientific Training in Agriculture. Preparation

for the Colonies. Students gained the First, Third, and Fourth Scholar. Further Particulars may be obtained on application to the NATURAL ships of the Royal Agricultural Society, 1888. SCIENCE TUTOR, Merton College.

Just Published, Price 15, ; by Post, 18. 41d. KING'S COLLEGE, LONDON.

THE VICTORIA UNIVERSITY BACTERIOLOGICAL LABORATORY.

CALENDAR FOR THE YEAR 1890.
The text Course of Lectures on COMPARATIVE PATHOLOGY and London : MACMILLAN AND CO. Manchester : J. E. CORNISH.
BACTERIOLOGY, with Practical Work in the Laboratory, will commence
on APRIL 1,

HENRY EBBAGE,
SUBJECTS OF LECTURES.
I Methods of Bacteriological Research.
11. History and Pathology of the Communicable Diseases of Man and of

344 CALEDONIAN ROAD, LONDON.
the Lower Animals.

MICROSCOPIC OBJECTS, Gorgeous Polarizing, Brilliant Opaque, and Fees: For the whole Course ... ... 45 5 0

Entertaining Slides, 3 X I, suitable for Evening Exhibition, 5s. Dozen ; For the Lectures only

63 30

Four Dozen Slides sent, carefully packed and Postage paid, for 218., tr

Australian Colonies, Belgium, Canada, France, Germany, India, New For further Particulars apply to Prof. CROOKSHANK, or to the Zealand, South Africa, &c. Microscopes, Mounting Apparatus, and all Sær RETARY, King's College, Strand.

requisites supplied.

Catalogue free to all Parts. LIVERPOOL SCHOOL BOARD. The Liverpool School Board require the services of an additional TO SCIENCE LECTURERS. ASSISTANT SCIENCE DEMONSTRATOR, qualified to take part in the Experimental Science Teaching (Mechanics, Chemistry, and Physics) TERN, used by W. LANT CARPENTER, Esq., Prof. FORBES, B. J. MALDEN

See Mr. HUGHES'S PATENT COMBINATION OPTICAL LAN. given in their Schools.

Salary, £100 first year, rising in four years to £120, with an extra annual Esq. New Oxyhydrogen Microscope. Grand Results. Docwra Triple, payment from 63 to 6n1 if applicant holds Science and Art Certificates and Prize Medal, Highest Award. Patent Pamphagos Lantern Science Lecture University distinctions and also a small proportion of the Grant received Sets. Novelties Cheapest and Best. Elaborately Illustrated Catalogue, for the classes taught (if any) under the Science and Art Department. 300 Pages, is. ; Postage, 5d. Smaller do., 6d. Pamphlets Free. HUGHES, Applications, stating

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SILVERED-GLASS REFLECTING

Clerk to the Board. Municipal Offices, March 8. 1890.

TELESCOPES.

CALVER'S well-known TELESCOPES received the Highest Award for CHEMICAL SOCIETY,

"Excellence and Improvements" at the International Exhibition, London. BURLINGTON HOUSE, LONDON, W.

Catalogues and Testimonials, 1s.-G. CALVER, F.R.A.S., Widford,

Chelmsford.
CHEMICAL SOCIETY ANNIVERSARY MEETING.
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MODELS, &c.-MOORE BROS., 49 Hardman Street, Liverpool.
Price List, Three Stamps.

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