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HARDWICKE'S SCIENCE-GOSSIP. HENRY CROUCH'S NEW STUDENT'S BINOCULAR MICROSCOPE.

Has Concentric Rotating Stage l-in. thick.
New Object Carrier, dispensing with Springs.
Fitting for accessories can be turned aside.
Hinged Mirror Stem so that the Mirror

can be swung above the stage. Is now fitted with large stand

Condenser. Best 1-in. 25° , 4-in. 110° in plain

mount.

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HENRY CROUCH, Barbican Optical Works, 66, Barbican, London, E.C. CHAS. COLLINS, JUNR., MICRO-NATURALIST,

BRISTOL HOÚSE, HARLESDEN, N.W.

(Within five minutes' walk of Willesden Junction.) PREPARER OF MICROSCOPICAL SPECIALITIES, MOUNTED WITH OR WITHOUT PRESSURE.

Post Free for 12s. 64.
Series No. 4 of COLLINS SPECIAL MICRO-SLIDES. Containing the following twelve

carefully prepared Specimens of Parasites.
1. Antelope.
5. Gannet.

9. Penguin.
2. Darwin's Rhea.

6. Heron.

10. Kittiwake Gull.
Eagle.
7. Peacock.

ings Tragopan.
4. Falcon.
8. Rufus Tinamus.

12. Vulture. The above set is enclosed in a Neat Cloth Racked Box, and each Slide contains a descriptive

label, giving the Sub., K., Class, Order, Family, &c.; Single Slides, ls. 3d. Post free. For full details of Series Nos. I, IA, and 2, see the December Number of Science-Gossip, page cxxx. New Series now in preparation.

Fu'LL DETAILED PROSPECTUS, WITH OPINIONS OF SCIENTIFIC PRESS. FREE ON APPLICATION, From CHARLES COLLINS's intimate acquaintance with all branches of the Microscopical Trade, he respectfully solicits Microscopists tu furnish him with particulars of their requirements in Microscopical Apparatus (new or secondhand), having facilities for procuring and, supplying them on most advantageous terms. All Orders (or Mounting Materials, Cements, Glass Slips, Thin Glass Circles, Cells ( Tin or G'ass), etc., executed with promptress.

CLEAR COMPLEXION.

GODFREY'S

EXTRACT OF ELDER FLOWERS

has long been known for its surprising effect in softening, improving, and preserving the Skin, and in rendering the Complexion clear and beautiful. It removes Tan, Sunburn, Redness, &c.; cures Pimples, Humours, and other Eruptions; and by persevering in its use the Skin becomes delicately soft, clear, and smooth. GODFREY'S EXTRACT OF ELDER FLOWERS

Possesses a delightful fragrance, and is an indispensable adjunct to the Toilet and Nursery.
Sold in Bottles, price 2s. od., by all Chemists and Perfumers.

DR. ROOKE'S ORIENTAL PILLS & SOLAR ELIXIR.

THESE WELL-KNOWN FAMILY MEDICINES have had a continually increasing sale throughout the United Kingdom and the British Colonies since their introduction in 1836, and are especially noted for their STRENGTHENING and RESTORATIVE Properties; hence their invariable success in the RELIEF and CURE of INDIGESTION,

PULMONARY CONSUMPTION, LIVER COMPLAINTS,

RHEUMATISM, ASTHMA,

GOUT, SCROFÜLA, BRONCHITIS,

GENERAL DEBILITY, AND ALL DISEASES OF THE NERVOUS SYSTEM, Whether arising from a sedentary mode of life, unhealthy occupation, insalubrious climate, or any

other cause.

The ORIENTAL PILLS AND SOLAR ELIXIR Are prepared only by CHARLES ROOKE, M.D., SCARBOROUGH. The PILLS are sold in boxes,

at is. Idd. and 4s. 6d. each; the ELIXIR in Bottles at 45. 6d. and us. each, duty included. Around each Box and Bottle are wrapped Directions for the Guidance of Patients in all Diseases.

DR. ROOKE'S HANDY POCKET-GUIDE TO HEALTH

HEALTH-RESTORING PLACES.

AND

FULL OF PLEASING ILLUSTRATIONS AND USEFUL INFORMATION, 88 PAGES. This Book may be obtained from any PATENT MEDICINE VENDOR, or POST FREE

from DR. ROOKE, Scarborough, England, on receipt of PENNY POSTAGE STAMP.

CROSBY'S COUGH ELIXIR

BALSAMIC

Is the leading Medicine of the day, and is specially recommended by several eminent Physicians. It has been used with the most signal success for Asthma, Bronchitis, Consumption, Coughs, Influenza, Consumptive Night Sweats, Spitting of Blood, Shortness of Breath, &c., and is a most valuable adjunct to Dr. ROOKE's Medicines in all affections of the Throat and Chest. : CROSBY'S BALSAMIC COUGH ELIXIR is sold everywhere, by all Chemists and Patent Medicine Vendors at the following prices :-1s. 1 d., 1s. 9d., 4s. 6d., and lls, each Bottle. A great saving is effected by purchasing the large Bottles. Full Directions with each Bottle.

LONDON : PRINTED BY WILLIAM CLOWES AND SONS, LIMITED, STAMFORD STREET AND CHARING CROSS

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The Sagacity and Morality of Plants.' With over 300 Illustrations. Cr. 8vo, cloth extra, 7s. 6d.

LONDON: CHATTO AND WINDUS, PICCADILLY. A Handbook for Students. By J. E. Taylor, Ph.D., F.L.S., &c., Author of

EPP S'S GRATEFULE) COCOA.“

GRATEFUL
COMFORTING

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MICROSCOPIC PREPARATIONS.
FIRST-CLASS SPECIMENS, New and Rare Objects in every Department of Microscopy.

LORD S. G. OSBORNE'S DIATOMESCOPE, Post-free, 12s.
Five Typical Examples of Blood Discs on one Slide, Man, Fish, Bird, Snake, and Frog, Double Stained, 3s. 6d. post-free..
A Large Assortment of Spines ERNEST HINTON. Koch's Cholera bacillus, 2s.6d.
of Echini.

post-free. 12, VORLEY ROAD, UPPER HOLLOWAY, LONDON, N.

(TWENTY YEARS WITH THE LATE E. WHEELER.)

CITY MICROSCOPICAL STUDIO AND GEOLOGICAL MUSEUM,
For the sale of Microscopic Objects, Minerals, Fossils, Rock Specimens, Shells,
Crustacea, Echinoderms, Corals, Flint Implements, Cabinets,

Geologists' Hammers, &c.
THOMAS D. RUSSELL, 78, NEWGATE STREET, E.C.,

CLOSE TO THE NEW GENERAL POST OFFICE.

WORKS BY EDWARD WALFORD, M.A.-Dedicated by Express Permission to H.R.H. THE PRINCE OF WALES. (New Editions for 1885.) THE COUNTY FAMILIES; or, Royal Manual of the Titled and Untitled

Aristocracy of the Three Kingdoms. Containing a complete Peerage, Baronetage, Knightage, and Dictionary of the Landed Commoners of England, Scotland, Wales, and Ireland; a Notice of the Descent, Birth, Marriage, Education, and Appointments of each P'erson, his Heir Apparent and Presumptive, a Record of the Offices which he has held, his Town Address and Country

Residences. Imperial 8vo, cloth gilt, £2 1os. THE COMPLETE PEERAGE, BARONETAGE, KNIGHTAGE, AND HOUSE

OF COMMONS. In One Volume, cloth extra, gilt edges, 55. THE SHILLING PEERAGE.

THE SHILLING KNIGHTAGE
THE SHILLING BARONETAGE.

THE SHILLING HOUSE OF COMMONS.
LONDON: CHATTO AND WINDUS, PICCADILLY, W.

ONS. In ODEERAGEAGE. OF COCHILLING BARONET

SECOND-HAND MICROSCOPES AND OBJECTIVES. A large assortment by ROSS, BECK, COLLINS, SWIFT, and other first-class Makers, on Sale, very cheap

MICROSCOPIO OBJECTS in great variety. Spécialité Physiological and Pathological Tissues. 500 SECOND-HAND PHOTOGRAPHIC LENSES AND CAMERAS By ROSS, DALLMEYER, TENCH, VOIGTLÄNDER, and all other esteemed Makers. The Cheapest and Best Stock in Londen.

New Catalogues gratis on application. Purchases and Exchanges made. Instruments Repaired and Relacquered. SANDS & HUNTER, 20, CRANBOURNE STREET, LONDON.

THROUGH ABDOMEN

OF QUEEN BEE,

Aris MELLIFICA. Showing Ovaries and all

Internal Organs. 25. and 35., Post-free. Opaque for Binocular.

VERTICAL section NEW PREPARATIONS FIRST LEG OF HONEY

OF INSECTS,

WITHOUT PRESSURE.
FRED. ENOCK,

WOKING.
HOW AND CO.'S NEW "POCKET MICROSCOPE LAMP."

DEE,
APIS MELLIFICA.
Showing the Semi-circular

Comb used for
Cleaning the Antennæ.

15. 81., Post-free. For Paraboloid.

Very convenient and portable, gives ample Illumination, has all necessary adjustments, is provided with a Cylindrical Case, and can be conveniently carried in the breast coat pocket; when charged

with sufficient Oil to burn for above 3 hours, weighs under 12 oz. Price 8s. 6d. Microscopists who are in the habit of exhibiting at the Meetings of their respective Societies and elsewhere,

should provide themselves with this little Lamp. MICRO-PETROLOGY, TYPICAL ROCK SECTIONS, 1/6 AND 2/- EACH. JAMES HOW & Co., 73, FARRINGDON STREET, LONDON.

STUDIES IN MICROSCOPICAL SCIENCE,

Edited by ARTHUR C. COLE, F.R.M.S., &c. VOL. III. will be commenced shortly. All correspondence connected with this Volume to be addressed to

J. G. HAMMOND & Co., 136 Edmund Street, Birmingham, from whom Prospectus can be obtained. Now ready, VOL. I., containing 53 Chromo-Lithographed Plates, ko lis. 6d. ; or, accompanied by 52 Prepara

tions, in Cabinet, £4 145. 6d. And VOL. II., containing THE METHODS OF MICROSCOPICAL RESEARCHI; SECTION I., ANIMAL HISTOLOGY ;

SECTION II., BOTANICAL HISTOLOGY; and POPULAR MICROSCOPICAL STUDIES; with 38 CHROMO

LITHOGRAPHED PLATES, £1 us. 6d. ; or, accompanied by 36 Preparations, in Cabinet, 44 45. ol. NOTE.-The Sections of either Volume may be had separately.

All correspondence having reference to Vols. I. and Il. to be addressed to the EditorST. DOMINGO HOUSE, 53, Oxford Gardens, Notting Hill, W.

From whom ali Particulars may be obtained. *** A. C, COLE AND SON'S Pathological, Physiological, Botanical, and general

Preparations and Diatoms, may be obtained of all the principal Opticians.

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WATKINS AND DONCASTER, Naturalists and Manufacturers of Entomological Apparatus and Cabinets.

N.B.-For Excellence and Superiority of Cabinets and Apparatus, references are permitted to

distinguished Patrons and Colleges, &C. Plain Ring Nets, Wire or Cane, including stick, 1/8, 2/5, 2/3. Breeding Cage, 2/6, 1/2,5/-, and 7/6. Folding Nets, 3/9 and 4/6.

Taxidermist's Companion, ie, a pocket leather case, containing Umbrella Nets, 7/6 (self-acting).

most useful instruments for skinning, 10/6. Pocket Boxes, -76; corked both sides, -/9, 1/-, and 1/6.

Coleopterist's Collecting Bottle, with tube, 1/6, 1/8. Zinc Relaxing Boxes, -/9, 1/-, 1/6, and 2/-.

Ditto, Tin Boxes, 1/6. Ditto, large size, with strap, 61-.

Ditto, Japanned Pocket Case, fitted with 26 tubes, 5/-. Nested Chip Boxes, 4 dozen, -/8.

(black). Botanical Cases, japanned, double tin, 1/6, 4/5, 575,6/-,9/-. Entomological Pins, assorted or mixed, 1/- per oz. (white or Botanical Paper, 1/1, 1/4, 1/9, and 2/2 per quire. (Too heavy Glass Killing Bottles or Tubes ready for use, 1/6, 1/6.

for post.) Sugaring Lanterns, 2/6 to 10/-.

Insect Cases, imitation mahogany, 3/6 to 11/-. Sugaring Tin, with brush, 1/6, 2/-,

(oz. Cement for replacing Antennæ, -76 per bottle. Mite Destroyer (not inflammable nor dangerous to use), 1/- per Forceps for removing Insects, 2/6 per pair. (Supplied to Store Boxes, 2/6, 4., 5., and 6/-.

Collectors all over the world.) Ditto, Book Pattern, 8/6, 9/6, and 10/6.

Cabinet Cork, 7 X 34, best quality, 1/3 per dozen sheets. Setting Boards, flat or oval, 1-in., -/6; it-in. -/8; 14-in., -/9| Pupa Diggers, 1/6,2/. Insect Lens, 1/6 to 3/-.

2-in., -/10; at-in. 1/-; 3-in., 1/2; 3t-in., 1/4; 4-in., 1/6; Glass Top Boxes, per dozen, 1/8, 2/-, 2/6.

41.in., 1/8; 5-in., 1/10. Complete set of 14 boards, 10/6. Egg Drills, -/3. Setting Houses, 9/6 and 11/6; corked back, 14/6.

Metal Blow-pipes, -17. Zinc Larva Boxes, 9/4, 1/.

Setting Needles, 6d. per box. All Articles enumerated are kept in stock, and can be sent immediately on receipt o, order. For Sale, a large Assortment of Ova and Pupæ of both British and Foreign Butterflies and Moths.

CABINETS.--Special Show Room.
The following are the prices of a few of smaller sizes; for measurements and larger sizes see Catalogue (48 pp.)

Minerals and Dried
Insect.

Eggs. Minerals and Dried 2885.

Insect.
Plants, Fossils, &c.

4-884. Plants, Fossils, &c. 4 Drawers .... 14/- .... 12/6 .. .. 10/6

8 Drawers .... 32/- ... 30/• .... 23/6 .. .. 18/- .... 16/6 .. .. 15/

10 - .... 48/- .. .. 42/ ... 40/A LARGE STOCK OF INSECTS AND BIRDS' EGGS.

Birds, Mammals, &c., Preserved and Mounted by First-class workmen. 36, STRAND, W.C. (FIVE DOORS FROM CHARING CROSS).

CHAS. COLLINS, JUNR., MICRO-NATURALIST,

BRISTOL HOUSE, HARLESDEN, NW.

(Within five minutes' walk of Willesden Junction.)

PREPARER OF MICROSCOPICAL SPECIALITIES,

MOUNTED WITH OR WITHOUT PRESSURE.

LIST OF SERIES ALREADY ISSUED :Series No. 1.–12 Slides of Fish Scales (Opaque), 10s. 6d. Series No. IA.- Slides of Fish Scales (Polariscope), 3 Skins (Opaque), 10s. 6d. Series No. 2.--12 Slides of Heads of Insects (mounted without pressure), 10s. 6d. Series No. 36 Slides of Parts of Insects (mounted without pressure), 5s. 6d. Series 4.-12 Slides of Parasites, 12s. 6d.

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Full detailed list of the above Series, post-free on application.

Every requisite supplied for Microscopical Mounting.

MICRO-SLIDES FOR SCIENCE CLASSES.

Mr. PIFFARD'S PATENT COUNTER-SUNK SLIPS now on Sale.

Two sizes are ready, 3-16 and 5-8, at 6s. Der dozen.
Prasiola Crispa. portion of Thallus. beautiful arrangement of Chlorophyl granules. ls. Teleutospores of Puccinia graminis, 15.
Spores and Elaters of Aneura Pinguis (Jungermanniacea) ls. Stained and Isolated Conidia-bearing Hyphæ, of a Micro-fungus, probably
Polyactis cana. ls. Lecanora Tartaren, vert. sect. of Apothecium. showing Asci, ls. Atrichum Undulatum, vert. sect., lale
Perichaetum and Antheridia, ls. Fasciated Stems of Strawberry. Sweet Pea, Tropaeolum and Thistle, ls, each.

REMITTANCE WITH ORDER. ENLARGED CATALOGUE READY, POST FREE.
B. PIFFARD, Hill House, Hemel Hempstead, Herts,

SCHWEITZER’S COCOATINA.

Anti-Dyspeptic Cocoa or Chocolate Powder. GUARANTEED PURE SOLUBLE COCOA OF THE FINEST QUALITY. The FACULTY pronounce it 'the most nutritious, perfectly digestible Beverage for BREAKFAST, LUNCHEON, or Supper, and invaluable for

Invalids, and Young Children.' Bcing without sugar, spice, or other admixture, it suits all palates, keeps for years in all climates, and is four times the strength of

Cocoas thickened yet weakened with arrowroot, starch, &-c., and in reality cheaper than such mixtures.

Made instantaneously with boiling water, a Teaspoonful to a Breakfast Cup, costing less than one halfpenny.
COCOATINA possesses remarkable sustaining properties, and is specially adapted for

early Breakfasts.
In Air-Tight Tins, at 1s. 6a., 38., 5s. 6d., &c., by Chemists and Grocers.

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