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Barbican Optical Works, 66, Barbican, London, E.C. MICROSCOPICAL

free.

SPECIALITIES.

Sixteen Specimens of Soundings collected by the Challenger' Expedition, 1s. 3d. each, post Direct from the late Sir Wyville Thomson. See following extract:-"I have sent none of the Challenger' Materials to any one but yourself."-Bonsyde, Linlithgow, N.B., June 7th, 1877.

J. T. NORMAN, OPTICIAN, &c., 178, CITY ROAD, LONDON, E.C.

ESTABLISHED 1848.

Prize Medal and Certificates for Excellence of Manufacture. Micro Troughs, Tanks, Cells, &c., made to any Size and Shape. Largest Selection of Typical Rock Sections in London, all correctly named, Is. 6d. each, post-free.

IN PREPARATION.

A NEW BOOK BY THE EDITOR OF "SCIENCE-GOSSIP."

OUR COMMON

BRITISH FOSSILS,

AND WHERE TO FIND THEM.

By J. E. TAYLOR, Ph.D., F.L.S., &c., Author of "The Sagacity and Morality of Plants."
Illustrations. Crown 8vo, cloth extra, 7s. 6d.

THE

:

LONDON CHATTO AND WINDUS, PICCADILLY, W.
BEST REMEDY FOR

With numerous

INDIGESTION.

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CAMOMILE PILLS

Are confidently recommended as a simple but certain Remedy for Indigestion, which is the cause of nearly all the diseases to which we are subject, being a medicine so uniformly grateful and beneficial, that it is with justice called the "Natural Strengthener of the Human Stomach." "Norton's Pills" act as a powerful tonic and gentle aperient; are mild in their operation, safe under any circumstances, and thousands of persons can now bear testimony to the benefits to be derived from their use, as they have been a never-failing Family Friend for upwards of 50 years. Sold in Bottles at Is. Id., 25. 9d., and 11s. each, in every Town in the Kingdom.

CAUTION.

Be sure to ask for "NORTON'S PILLS" and do not be persuaded to purchase an imitation.

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,

LIVER COMPLAINTS,
ASTHMA,

BRONCHITIS,

AND ALL DISEASES OF THE

PULMONARY CONSUMPTION,
RHEUMATISM,

GOUT, SCROFULA,
GENERAL DEBILITY,
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. 1d. and 4s. 6d. each; the ELIXIR in Bottles at 4s. 6d. and 11s. 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

AND

HEALTH-RESTORING PLACES.

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

BALSAMIC

COUGH ELIXIR

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. 1d., 1s. 9d., 4s. 6d., and 11s. 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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MICROSCOPIC PREPARATIONS.

ERNEST HINTON,

12, VORLEY ROAD, UPPER HOLLOWAY, LONDON, N.

(TWENTY YEARS WITH THE LATE E. WHEELER.)

E. H. begs to inform his friends and the Scientific World that he has commenced business at the above address, and from his long experience with Mr. WHEELER, he will be enabled to submit to their notice a choice selection of newly-mounted Objects in all branches of Nature, at the lowest prices. LORD S. G. OSBORNE'S DIATOMESCOPE, Post-free, 12s.

See "English Mechanic," August 22nd, page 561.

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.

MICROSCOPICAL SPECIALITIES,

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ILLUSTRATING THE GROWTH, REPRODUCTION, AND STRUCTURE OF PLANTS. Diatoms mounted in monobromide of Naphthaline 1/- and 1/6 each. Vaucheria in fruit, Batrachospermum and 1/- per slide Pollen grain of Enothera emitting tube ...... V.S. of Fertilized Ovule of Mallow .... T.S. of Stem and Leaf of Nepenthes, double-stained

... 1/1 each.

....

1/6
1/3"

Pediastrum
Spirogyra in conjugation, stained and mounted
without contraction

... 1/6,

Specially prepared illustrations of Sachs' and Thome's Textbooks of Botany, being copies of Figures in those works.
CHAS. V. SMITH, CARMARTHEN. [Lists on Application.

All Post-free.]

SECOND-HAND MICROSCOPES AND OBJECTIVES.

A large assortment by ROSS, BECK, COLLINS, SWIFT, and other first-class Makers, on Sale, very cheap. MICROSCOPIC 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 London. New Catalogues gratis on application. Purchases and Exchanges made. Instruments Repaired and Relacquered. SANDS & HUNTER, 20, CRANBOURNE STREET, LONDON.

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

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.

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J. H. STEWARD, 406 & 66 STRAND, 456 WEST STRAND, 54 CORNHILL, LONDON.

HARDWICKE'S SCIENCE-GOSSIP.

XV

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.

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Entomological Pins, assorted or mixed, 1/- per oz. (white or
Glass Killing Bottles or Tubes ready for use, 1/-, 1/5.
Sugaring Lanterns, 2/6 to 10/-.
Sugaring Tin, with brush, 1/6, 2/-.

[oz.

Mite Destroyer (not inflammable nor dangerous to use), 1/- per
Store Boxes, 2/6, 4/-, 5/-, and 6/-.

Ditto, Book Pattern, 8/6, 9/6, and 10/6.

Setting Boards, flat or oval, 1-in., -/6; 1-in. -/8; 14-in., -/9
2-in., -/10: 24-in. 1/-; 3-in., 1/2; 34-in., 1/4; 4-in., 1/6;
4t-in., 1/8; 5-in., 1/10. Complete set of 14 boards, 10/6.
Setting Houses, 9/6 and 11/6; corked back, 14/6.
Zinc Larva Boxes, 9/-, 1/-.

Breeding Cage, 2/6, 4/-, 5/-, and 7/6.

Taxidermist's Companion, i.e. a pocket leather case, containing
most useful instruments for skinning, 10/6.
Coleopterist's Collecting Bottle, with tube, 1/6, 1/8.
Ditto, Tin Boxes, 1/6.

Ditto, Japanned Pocket Case, fitted with 26 tubes, 5/-.
Botanical Cases, japanned, double tin, 1/6, 4/-, 5/-, 6/-, 9/-.
Botanical Paper, 1/1, 1/4, 1/9, and 2/2 per quire. (Too heavy

for post.)

(Supplied to

Insect Cases, imitation mahogany, 3/6 to 11/-.
Cement for replacing Antennæ, -/6 per bottle.
Forceps for removing Insects, 2/6 per pair.
Collectors all over the world.)
Cabinet Cork, 7 X 34, best quality, 1/3 per dozen sheets.
Pupa Diggers, 1/6, 2/-. Insect Lens, 1/6 to 8/-.
Glass Top Boxes, per dozen, 1/8, 2/-, 2/6.
Egg Drills, -/3.

Metal Blow-pipes, -/7.

Setting Needles, 6d. per box.

All Articles enumerated are kept in stock, and can be sent immediately on receipt of order.

For Sale, a large Assortment of Ova and Pupa 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.)

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Minerals and Dried Insect. Eggs. Plants, Fossils, &c.

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32/- 30/-
48/..... 42/-

....

....

23/

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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). MAGIC LANTERN AND DISSOLVING VIEWS.

The Cheapest and Best House in London for Phantasmagoria, Lanterns, and Dissolving Views, &c.

C. BAKER, 243, 2431, & 244, HIGH HOLBORN.

Phantasmagoria Lantern, with 3-inch Condenser, will show a disc 10 feet in diameter, with Fountain Solar Argand Lamp, suitable for Schools or Lecturers, £217s. 6d. Pair of Ditto, arranged for Dissolving Views, in Case, complete, £7. A New Portable Lantern, Burning Paraffine Oil, with Patent Double Wick Lamp, and 3t-in. Condenser, £3 3s. Od., or with Triple Wick, £3 8s. Od.

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PHOTOGRAPHED SLIDES FOR THE ABOVE.

Popular Tales, English or Foreign Scenery, &c. Plain, Is. 3d.; Coloured, from 2s. 6d. each.
An improved Lantern with Petroleum Lamp and Forty-eight Views, including a
Moving Slide and Chromotrope, from 15s. to 40s.

A COLLECTION OF LANTERNS AND VIEWS SPECIALLY KEPT FOR HIRE.
CATALOGUES FREE BY POST.

MICRO-SLIDES FOR

SCIENCE CLASSES.

Sale

Mr. PIFFARD'S PATENT COUNTER-SUNK SLIPS are now on
They are thus described in the Journal of the Royal Microscopical

Two sizes are ready, 3-16 and 5-8, at 6s. per dozen. Society, August, 1884"PIFFARD'S SLIDES.-Mr. B. Piffard has patented a slide, which is made by forming with a diamond a round recess in an ordinary slide. In this the object is placed, and covered with thin glass. The upper surface of the slide is thus perfectly smooth, the cover-glass being even with the slide. There is no danger of the cover-glass and object being knocked off; and the recess causes a very beautiful diffusion of light." REMITTANCE WITH ORDER. ENLARGED CATALOGUE READY, POST FREE. B. PIFFARD, Hill House, Hemel Hempstead, Herts.

Possessing all the Properties of the finest Arrowroot,

BROWN AND POLSON'S CORN FLOUR

Is a Household Requisite of Constant Utility

FOR THE NURSERY, THE FAMILY TABLE, AND THE SICK ROOM. NOTE.-Unlike many others, this CORN FLOUR bears the Name of its Manufacturers, who offer the guarantee of their long-established reputation for its uniformly Superior Quality.

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