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SUBSCRIPTIONS TO "NATURE."

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Quarterly

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FOR INFANTS.
CHILDREN&INVALIDS

FOOD

GOLD MEDAL. HEALTH EXHIBITION, LONDON. HIGHEST AWARD, ADELAIDE 1887, and MELBOURNE The British Medical Journal says - Benger's Food has by its lence established a reputation of its own."

"Devised on original lines, infants do remarkably well en it. They certainly a great future before it."-Illustrated Medical News. "Mr. Benger's admirable preparations."-Lancet.

Tins-1/6, 2/6, 5/-, and 10-, Everywhere.
WHOLESALE OF ALL WHOLESALE HOUSES.

BEST BLACK INK KNOWN.
DRAPER'S INK (DICHROIC).

DIFFERING FROM ANYTHING ELSE EVER PRODUCE: Writing becomes a pleasure when this Ink is used. It has been adi pes the principal Banks, Public Offices, and Railway Companies thrs, Ireland.

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WEAK AND DEFECTIVE

SIGHT..

SPECTACLES scientifically adapted to remedy impaired vision Mr. ACKLAND. Surgeon, daily, at HORNE AND THORNTHWAITS Opticians to the Queen, 416 Strand, London. The weak-sighted sch read Ackland's "Hints on Spectacles." 6d., post free.

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MESSRS. MACMILLAN AND CO.'S NEW BOOKS.

NOW READY, AN IMPORTANT, CHOICELY ILLUSTRATED WORK.

EN DRAWING AND PEN DRAUGHTSMEN: their Work and their Methods. Study of the Art to-day, with Technical Suggestions. By JOSEPH PENNELL. With 158 Illustrations, of which 12 are Photogravures. The illustrations consist of work by eminent English, Foreign, and American Artists. 4to. £3 135. 6d. net. The Edition is limited to 1000 Copies, of which 500 have been secured for America.

THE SCIENTIFIC PAPERS OF ASA GRAY. Selected by CHARLES SPRAGUE

ARGENT. 2 Vols. Demy 8vo, 215.

Vol. 1.-Reviews of Works on Botany and Related Subjects, 1834-1887. Vol. II.-Essays: Biographical Sketches, 1841-1886. SECOND EDITION, REVISED, AND GREATLY ENLARGED.

ABSOLUTE MEASUREMENTS IN ELECTRICITY AND MAGNETISM By ANDREW GRAY, M.A., F.R.S.E. Professor of Physics in the University College of North Wales. Fcap. 8vo, 5s. 6d A NEW BOOK BY MR. ALFRED RUSSEL WALLACE. THIRD EDITION.

DARWINISM; an Exposition of the Theory of Natural Selection, with some of its Applications. By ALFRED RUSSEL WALLACE, LL.D., D.C.L., F. L. S., &c., Author of "The Malay Archipelago, ' "The Geographical Distribution of Animals," ," "Island Life," &c. With Portrait and Map. Third Edition. Crown 8vo, 9s A POPULAR TREATISE ON THE WINDS; comprising the General Motions of the Atmosphere, Monsoons, Cyclones, Tornadoes, Waterspouts, Hailstorms, &c. By WM. FERREL, M.A., Ph.D., late Professor and Assistant in the Signal Service, Member of the American National Academy of Sciences, and of other Home and Foreign Scientific Societies. Demy 8vo, 18s.

MACMILLAN AND CO., LONDON.

Excellent Copies of the actual, natural Handwriting, also of Drawings, Music, even of elaborate Sketches, Programmes, Plans (up to Double-Elephant size). Shorthand, and Type Writing, are easily, quickly, and cheaply produced by the

AUTOCOPYIST

Very fluid ink, used with ordinary pen and paper. Auto-Circulars resemble written letters. Used at the House of Lords, &c.

AUTOCOPYIST DEPT. (A.E.T.Co., Ld.), London Wall, London, and 52 Princess Street, Manchester.

THE ZOOLOGIST:

A MONTHLY MAGAZINE OF NATURAL HISTORY.
Third Series. Edited by J. E. HARTING, F.L. S., F.Z.S., member of the
British Ornithologists' Union; contains-

Original Articles by well-known naturalists in every branch of zoology; habits of animals; arrival and departure of migratory birds; occurrence of rare birds; distribution and migration of British fresh-water fish; new or rare marine fish; local aquaria; British reptiles; British land and freshwater mollusca, with remarks on the haunts and habits of the species; and other matters of general interest to those who delight in natural history. Reports of the Linnean, Zoological, and Entomological Societies. Reviews of natural history books. Occasional translations from foreign zoological journals of important and interesting articles in various branches of zoology. There are occasional woodcuts.

SIMPKIN, MARSHALL, & CO., Stationers' Hall Court.

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Works in any Weather. Size giving 4 Sparks, £4 10s.

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HARVEY & & PEAK,

6 CHARING CROSS ROAD, W.C.

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TO H.R.H. THE PRINCE OF WALES, THE EMPRESS OF GERMANY, &c.

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BRAND & Co.'s

A1 SAUCE.

A FINE TONIC AND
DIGESTIVE.

An excellent relish for "fish, flesh,

and fowl."

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JUST PUBLISHED. NEW EDITION OF WATSON AND SONS'

CATALOGUE OF

MICROSCOPES, OBJECTIVES, & ACCESSORY APPARATUS.

. It contains Instruments suitable for every class of investigation, many of quite new design, and all fitted with every modern improvement.

Everyone interested in Microscopy, and especially intending purchasers of Instruments, should see this new Catalogue.

FORWARDED POST FREE ON APPLICATION TO

W. WATSON & SONS, Opticians to Her Majesty's Government,

313 HIGH HOLBORN, LONDON, W.C., AND 251 SWANSTON ST., MELBOURNE, AUSTRALIA ESTABLISHED 1837.

.

"IT IS NOT TRUE" that any Disinfectant excels, or is cheaper (in using) than

No.

5

CALVERT'S

CARBOLI C.

The most reliable preparation YET discovered as a Preventive of Cholera or Fevers, and for the destruction of Insect or Germ Life. Sold in 1/ and 1/6 ribbed Bottles, 1, 1, and 1 Gallon Tins.

Dr. R. M. GOVER, in his report to the Director-General of Prisons, says 'Carbolic Acid is the most certain and powere of the numerous substances used as antiseptics and disinfectants. The preparations supplied by Messrs. CALVERT AND CO. are in my opinion, much superior to those of any other manufacturer."

See that Trade Mark is on

each Package over the Cork.

F. C. CALVERT AND CO., MANCHESTER,

Awarded 50 Gold and Silver Medals and Diplomas,

In each case the HIGHEST Award when tested in competition with other Disinfectants.

Ped by RICHARD CLAY AND SONS, LIMITED, at 7 and 8 Bread Street Hill, Queen Victoria Street, in the City of London, and Published by MACMILLAN AND Co., at the Office, 29 and 30 Pedford Street, Covent Garden.-THURSDAY, December 12, 1889.

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THE CAMBRIDGE SCIENTIFIC INSTRUMENT COMPANY, NECRETTI & ZAMBRA'S CHRISTMAS PRESENTS.

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Now Ready, Vol. X. Complete.

Price to Subscribers 215. per Yearly Volume, post free.

THE JOURNAL OF PHYSIOLOGY.
Edited with the Co-operation in England of Prof. W. RUTHERFORD,
V.R.S., of Edinburgh, Prof. J. BURDON-SANDERSON, F.R.S.,
of Oxford: and in America of Prof. H. P. BOWDITCH, of Boston;
Prof. H. NEWELL MARTIN, F.R.S., of Baltimore; Prof. H. C.
WOOD, of Philadelphia,

BY MICHAEL FOSTER, M.D., F.R.S.
Published by the Proprietors and sold on their behalf at
THE CAMBRIDGE SCIENTIFIC INSTRUMENT COMPANY'S WORKS,
ST. TIBB'S ROW, CAMBRIDGE.

OPERA, RACE, & FIELD GLASSES

OF EVERY DESCRIPTION.

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."

NOTICE.

NATURE

FOR

THURSDAY, DECEMBER 26, 1889,

WILL BE PUBLISHED ON

TUESDAY, DECEMBER 24, 1889,

AT 2.30 O'CLOCK.

29 BEDFORD STREET, COVENT GARDEN, W.C.

MERCHANT VENTURERS' SCHOOL, BRISTOL.

The HEAD-MASTERSHIP of this School of Science, Art. Technology, and Commerce will become VACANT after the Examinations in MAY 1890.

The School works in connection with the Department of Science and Art, and the Head-Master must be qualified to teach, and superintend teaching, under the conditions laid down by that Department.

He will be required to devote his whole time to the work of the School, and to be responsible personally for the Chemical Branch of it, which has large and well-appointed Laboratories.

There are upwards of 1300 Students now in attendance.
Evening Classes form an important part of the School.

Applications for the Head-Mastership must be sent in to the underwritten address before JANUARY 31, 1890, and may be accompanied by Copies of not more than Five Testimonials.

Applications from Candidates who cannot show that they have had experience in teaching and in organizing Schools, and in the modes of scientific and technical education, or from Candidates above the age of Thirty-five, will not be considered.

The Salary, made up partly of a fixed payment, partly of Capitation Fees, and partly of a share of Grants on results of examinations, will be guaranteed at not less than £500 a year

Further information may be obtained from GEORGE H. Pope, Merchants' Hall, Bristol.

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LIVING SPECIMENS FOR THE MICROSCOPE

GOLD MEDAL awarded at the FISHERIES EXHIBITION 2 THOMAS BOLTON, 83 CAMDen Street, BIRMINGHAY Who last week sent to his subscribers Trout Ova, with sketch and des. tion. He also sent out Philoding roseola, Corethra, Floscularia, Clato elegans, Limnias ceratophylli, Melicerta ringens, Stephanoceros, globator; also Amoeba, Hydra, Vorticella, Crayfish, Dog-Fish, Ampha,and other Specimens for Biological Laboratory work.

Weekly Announcements will be made in this place of organisms T is supplying.

Specimen Tube, One Shilling, post free. Twenty-six Tubes in Course of Six Months for Subscription of £x 12 or Twelve Tubes for 10s. 6d.

Portfolio of Drawings, Eleven Par's, 15. each.

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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. English and Foreign Rocks, Minerals, Fossils, Shells, and othe Objects of Natural History.'

HAND SPECIMENS of ROCKS and ROCK-FORMING MINERALS from 3d. each, especially selected for Private Study and Socia Teaching. STUDENTS' CABINETS, 12 inches x 8 inches x 3 inches, with tw Lifting Trays and Internal Fittings, containing 60 to 65 Exam, e Minerals, Rocks, and Rock-Formers, Fossils to illustrate all Forms or Recent Shells: 175. each.

ROCK SECTIONS IN GREAT VARIETY. MICRO GLASS SLIDES and COVER SLIPS, Round or Square (a English make only), RACK BOXES, &c. APPARATUS for BLOWPIPE and other ANALYSIS. CABINETS for Minerals or Shells, or fitted with divisions for Eggs GLASS-TOPPED BOXES in all sizes, and other Scientific Requisites Lapidary's Work executed on the Premises.

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BIOLOGY.-Thorough Preparation in the OSTEOLOGICAL SPECIMENS

above for London Examinations by Graduates. Special Facilities for Practical Work. - Address "PRACTICAL," 27 Chancery Lane.

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

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