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HARDWICKE'S SCIENCE GOSSIP,

Published Monthly, price 4d. No. 83, NOVEMBER, 1871, contains : THE STORY OF A PIECE OF QUARTZ.

SKELETON LEAVES. LUMINOSITY OF PLANTS.

ALONG SHORE. Illustrated. NOTE ON THE FARMING OF BRITTANY.

AQUARIA. ANTS. Illustrated.

SCALE OF PERCH. Ilustrated. DEFENSIVE RESOURCES OF BRITISH INSECTS. I CLEANING SKELETONS.

London : ROBERT HARDWICKE, 192, PICCADILLY, W.

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THE MONTHLY MICROSCOPICAL JOURNAL.

No. XXXIV., for OCTOBER, 1871, price 1s. 6d., contains :-
A RARE MELIÇERTIAN; WITH REMARKS ON THE HOMOLOGICAL POSITION OF THIS FORM, AND ALSO ON THE

PREVIOUSLY-RECORDED NEW SPECIES FLOSCULARIA CORONETTA. By Charles Cubitt, F.R.M.S. With Plate.
ON AN IMPROVED METHOD OF PHOTOGRAPHING HISTOLOGICAL PREPARATIONS BY SUNLIGHT. By J. J. Wood.

ward, Assistant-Surgeon U.S. Army.
HÆMATOZOA IN BLOOD OF CEYLON DEER. By Boyd Moss, M.D. With Plate.
MICROSCOPICAL Fiesu RES IN THE MASTICATING SURFACE OF MOLARS AND BICUSPIDS. By J. H. M'Quillen,

M.D., D.D.S., Professor of Physiology in Philadelphia Dental College.
TRANSMUTATION OF FORM IN CERTAIN PROT. Zoa. By Metcalfe Johnson, M.R.C.S.E., Lancaster. With Plate.
ON GNAts' SCALES. By Jabez Hogg, Esq., Hon. Sec. R.M.S.
THE EXAMINATION OF NOBERT'S NINETEENTH BAND. By F. A. P. Barnard, of Columbia College, New York.

WITH REVIEWS OF BOOKS AND SUMMARY OF MICROSCOPICAL PROGRESS AT HOME AND ABROAD.
Now ready, in Cloth, price 10s, 6d., Vol. V. of the above, 286 pp. and 21 whole-page plates ; also

Vols. I., II., III., and IV. may be had in Cloth, price 10s. 6d. each.
London : ROBERT HARDWICKE, 192, PICCADILLY, W.

« Exhaustive of the subject, and worthy of the branch of science it illustrates." -The Times.

" Will be the most complete Flora of Great Britain ever brought out. This great work will find a place wherever botanical science is cultivated, and the study of our native plants, with all their fascinating associations, held dear." -Athenæum.

Publishing in Monthly Parts, 5s. each,

SOWERBY'S ENGLISH BOTANY:

1

Containing a Description and Life-size Drawing of every British Plant. Edited, and brought
up to the present standard of scientific knowledge, by T. BoSWELL SYME, F.L.S., &c. With
Popular Descriptions of the Uses, History, and Traditions of each Plant, by Mrs. LANKESTER,
Author of "Wild Flowers worth Notice,' «The British Ferns,' &c. The Figures by J. E.
SOWERBY, JAMES SOWERBY, F.L.S., J. DE C. SOWERBY, F.L.S., and J. W. SALTER, A.L.S.

The distinctive characteristics of this Edition are

1. A Life-size Drawing of every British Plant, arranged according to the Natural System of De Candolle.

2. Where necessary, the Plates are accompanied by Illustrations of the structure of the various organs of the Plant, especially of those structures discovered within the last few years by the use of the Microscope.

3. All the Illustrations are full-coloured, instead of half-coloured, and the utmost care is taken to adhere as closely as possible to nature.

The Prices of the Volumes are-
Bound cloth.
Half morocco.

Morocco elegant.
£ 8. d.
£ 8. d.

£ 8. d. Vol. 1. (Seven Parts)

1 18 0
2 2 0

2 8 6 Vol. 2. (ditto)

1 18 0

2 2 0
Vol. 3. (Eight Parts)
Vol. 4. (Nine Parts)
Vol. 5. (Eight Parts)
Vol. 6. (Seven Parts)
Vol. 7. (ditto)

2 2 0 Vol. 8. (Ten Parts)

2 17 0

2 3 6 Vol. 9. Seven Parts) .. 1 18 0

2 2 0

2 8 6 Vol. 10. (ditto) ...... 1 18 0

2 2 0 ....... 2 8 6
Or, the Ten Volumes complete to present time, £20. 158. in cloth; £22. 158, in half morocco ;
and £26 whole morocco. The First, Second, Third, and Fourth Parts of the XIth and

concluding Volume are now ready.
London : ROBERT HARDWICKE, 192, PICCADILLY, W.

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MICROSCOPIC OBJECTS.

Classified Catalogue. New Edition for 1871. Post Free. Specimens of the highest attainable perfection. New and Rare Diatomacere and

Binocular Objects. Möller's Typen Plattes. Microscopes, and all Materials

and Instruments for Mounting. First-class Achromatic Objectives. EDMUND WHEELER, 48m, Tollington Road, Holloway, London, N. HENRY CROUCH,

51, London Wall, London, E.C. REVISED PRICE LIST OF OBJECTIVES. The Objectives comprised in the following Lists are guaranteed of the highest class, and especial attention is directed to the new IMMERSION -in., unsurpassed for brilliance and definition, and working through the thickest covering glass.

The new IMMERSION, -in. 140°, with screw adjustment for thickness of cover, £4. 108. ; with extra dry front, £5. iOs. £. 8. d. £. 8. d.

£. 8. d. 4-in. 9° .. .. 1 0 0 ; l-in. 25° .. .. 1 10 0 tin, 100% .. . 300) 3-in. 12° .. .. 1 10 0 1-in. 16° .. .. 1 0 0 l-in. 75o.. .. 2 2 0 2-in. 15° .. .. 1 10 0 2-in. 300 .. . 1 10 0 -in. 1000 .. .. 3 0 0 2-in. 12° .. .. 10 On-in, 40' .. .. 25 0 -in. 1-10° .. .. 4 10 0 1k-in. 20° .. .. 1 100 i-in. 90° .. . 3 15 0

Post-Office Orders to be made payable at Lombard Street, will 6d. extra for postage.

MUSHROOMS AND TOADSTOOLS: How to distinguish easily the Difference between Edible and Poisonous Fungi; with two large sheets, containing figures of twenty-nine Edible and thirty-one Poisonous Species, drawn the natural size, and coloured froin living specimens. By WORTHINGTON G. SMITH, F.L.S., &c. In sheets, with book, price 68.; on canvas in cloth case, for pocket, 108. 6d.; on canvas, with rollers and varnished, for hanging up, 10s. 6d.

“ Before the appearance of Mr. Smith's hook scarcely more than three or four kinds were freely accepted by prudent cooks. We have now before us the list of esculent mushrooms recommended, nay, warranted by Mr. Smith, of all of which he and his friends have freely partaken, with the most satisfactory results, and many of which are far more delicious in flavour and toothsome in substance than the meadow and horse mushrooms, generally known as the mushrooms of commerce." Pall Mall Gozetle.

MICROSCOPIC FUNGI. (Rust, Smut, Mildew, and Mould.) An Introduction to the Study of Microscopic Fungi. By M. C. COOKE, Author of the British Fungi.' Fcap. 8vo, nearly 300 coloured Figures. Second Edition, with Appendix of New Species, price 6s.

" There is a thoroughness about Mr. Cooke's writings which always makes his communications welcome. He is not content to gather information from cyclopædias, classify and adapt, and then give a new form to the ihoughts of others. On the contrary, he strikes out a new course of study, and after

course of study, and after a laborious course of analysis, produces an entirely original work, one on wbich nothirg of the kind had been before attempted."- Wesleyan Times.

London: ROBERT HARDWICKE, 192, PICCADILLY. W.

THE POPULAR SCIENCE REVIEW.

No. XLI., OCTOBER, 1871, price 2s. 6d., contains :-
How Fishes BREATHE. By J. C. Galton, M.A., F.L.S.
Mr. CROOKE's New PSYCHIC FORCE. By J. P. Earwaker,
THE Moss WORLD. By R. Braithwaite, M.D., F.L.S.
THEORY OF A NERvors ETHER. Dr. Richardson, M.A., M.D., F.R.S.
ON PLEISTOCENE CLIMATE AND THE RELATION OF THE PLEISTOCENE MAMMALIA

TO THE GLACIAL PERIOD. By W. Boyd Dawkins, F.R.S.
STAR STREAMS AND STAR SPRAYS. By R. A. Proctor, B.A., F.R.A.S.

REVIEWS OF Books, SUMMARY OF PROGRESS IN EVERY DEPARTMENT OF SCIENCE, Vol. X. Now Ready, upwards of 450 pp. and 13 whole-page Plates, in Cloth, 128. Complete Sets, in Numbers, £5. 08. 6d. 10 Vols., Clóth, 26. 38. Half Morocco, £7. 138.

London : ROBERT HARDWICKE, 192, PICCADILLY, W.

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UNITED STATES DIRECT BY POST.-The Publisher will Mail this Journal to any Address in the

United States for One Year on receipt of £1. 4s, English, or 6 dollars 68 cents United States currency. Any of the early Volumes on receipt of 3 dollars 25 cents.

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Tumhers and Yolumes kept in Print.

COLLINS' FIVE GUINEA MICROSCOPE.

Particulars Free by Post.

Also, for Two Stamps, Illustrated Catalogue of MICROSCOPES from £3. 3s..

INCLUDING DETAILS OF THE
" HARLEY” BINOCULARS, LAMPS, DISSECTING MICROSCOPES,

MOUNTING MATERIALS, &c., &c.
Pocket Lenses : single, ls.; double, 2s.; treble, 3s.; by post Two Stamps.

Webster's Achromatic Condenser can be fitted to any Microscope. 157, GREAT PORTLAND STREET, Corner of WEYMOUTH STREET ;

Late 77, GREAT TITCHFIELD STREET,

Fcap. 8vo, cloth, with Illustrations on Stone and Wood, price 28. 61.
HALF-HOURS WITH THE TELESCOPE,
Being a Popular Guide to the Use of the Telescope as a means of Amusement and Instruction.

Adapted to inexpensive Instruments.
By R. A. PROCTOR, B.A., F.R.A.S.

Demy 4to, cloth, price 58. HALF-HOURS WITH THE STARS. A Plain and Easy Guide to the Knowledge of the Constellations. Showing in Twelve Maps the position of the

principal Star-Groups night after night throughout the year. With Introduction, and a separate explanation of each Map. True for every year. By RICHARD A. PROCTOR, B.A., F.R.A.S., Author of Half-hours with the Telescope.'

London: ROBERT HARDWICKE, 192, PICCADILLY, W.

SECOND-HAND MICROSCOPES,

By Smith and Beck, Ross, Pillischer, and others.
PHOTOGRAPHIC CAMERAS AND LENSES,

By Ross, Dallmeyer, Voigtländer, and others. ASTRONOMICAL, TOURISTS', SLING, AND SEASIDE TELESCOPES. Magic and Dissolving-view Lanterns and Slides. RACE, FIELD, AND OPERA GLASSES. SURGICAL, MATHEMATICAL,

AND SURVEYING INSTRUMENTS, AT WILLIAM LAWLEY'S, 78, Farringdon Street, City. Enlarged and Revised Catalogues of nearly 100 Pages for Three Stamps each.

Enlarged Illustrated Surgical Catalogue, Six Stamps.

J. SWIFT, MICROSCOPE MAKER AND PRACTICAL OPTICIAN.

FOUR GOLD MEDALS AWARDED FOR SUPERIOR QUALITY OF MICROSCOPE OBJECTIVES, FOR DEFINITION AND DEFINING POWER UNSURPASSED.

Fully Illustrated Catalogue of Microscopes and accessories free for Stamp.

43, University St., Tottenham Court Road, London, W.C.

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