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12 ST. JAMES'S SQUARE.

Committee.
Sir JAMES ALDERSON.

Sir FREDERICK ELLIOT. |R. H. Hutton, Esq.
W. ALLINGHAM, Esq.
Rev. E. E. ESTCOURT.

Thomas H. KEY, Esq.
EDWARD A. BOND, Esq. Robert Faria, Esq.

G. H. LEWES, Esq. Rev. W. H. BROOKFIELD. Lord EDMUND FITZMAURICE, M.P. Sir John LUBBOCK, Bart., M.P. Edward H. BUNBURY, Esq. John Forster, Esq.

Cecil MONRO, Esq. C.W. COPE, Esq., R.A. H. W. FREELAND, Esq.

Rt. Hon. Sir R. J. PHILILMORE. Rev. LLEWELLYN Davies. F. Galton, Esq.

JAMES SPBDDING, Esq.
W. B. DONNE, Esq.
Lord HOUGHTON.

| HERBERT SPENCER, Esq. The number of volumes allowed to each member is ten in London, or fifteen in the country. The newest standard books are supplied in such proportion to the demand as is consistent with the original design of the Library—that, namely, of furnishing the best books of all ages and countries. The Reading-rooms, which are open from 10 a.m. to half-past 6 P.M., contain the best periodicals, English and foreign, which, with a selection of the newest books, are kept on the table.

The Subscription is £3 a year without entrance fee, or £2 a year with entrance fee of £6. Life Subscription, £26.

ROBERT HARRISON, Secretary and Librarian.

VUSHROOMS AND TOADSTOOLS: How

to Distinguish easily the Difference between Edible and Poisonous Fungi ; with two large Sheets, containing Figures of 22 Edible and 31 Poisonous Species, drawn the natural size, and coloured from living specimens. By WORTHINGTON G. SMITH, F.L.S., &c. In sheets, with book, price 68.; on canvas, in cloth case, for pocket, 103. 6d.; on canvas, with rollers and vamished, for hanging up, 10s. 6d. THE BRITISH FUNGI (a Plain and Easy I Account of). With especial reference to the Esculent and other Economic Species. By M. C. COOKE. New and Revised Edition, with Coloured Plates of 40 Species. Fcp. price 6s.

A very readable volume upon the lowest and least generally understood race of plants. For popular purposes the book could not have been better done.'-ATHENAUM.

London: Robert Hardwicke, 192 Piccadilly.

SEA-HORSE HOUSE,

190 GT. PORTLAND Sr., LONDON, W.

H. KING has a large Collection of Uli Live Sea-Horses, Marine Creatures for the Aquaria, Gold Fish, Trout, Store Fish of every kind; Live Bait, 6d. doz. ; Sea-Water, 6d. per gallon. As also a large collection of British Lepidoptera from 1s. doz. ; neat Cabinets of Birds' Eggs and Shells. Reeres' first 8 vols, of Conchologia Iconica, £40; Latham, 10 rols., £10; Tebed's Great Work, 4 vols., green morocco, £10 coloured ; Rockeries; Fishhatching Apparatus, and Microscopical Living Objects.

HARDWICKE'S SCIENCE GOSSIP,

No. 94, for OCTOBER 1872, price 4d., contains :
COLLECTING AND PRESERVING. No. 9. LICHENS. | Fossil MONKEYS. By J. E. T.
By the Rev. J. M. Crombie, M.A.

The Potato DISEASE. By Worthington G.
A NEW SPECIES OF PROTOCYSTIS. By. F. Smith, F.L.S.- Fully Illustrated.
Kitton, Esq.

| ANCIENT STONE IMPLEMENTS.Illustrated.

The Emperor's' Moth. With a host of interesting information in Microscopy, Geology. Zoology, Natural History, Botany, Notes and

Queries, Notices to Correspondents, &c.

London: ROBERT HARDWICKE, 192 Piccadilly, W.

THE MONTHLY MICROSCOPICAL JOURNAL.

No. 46, for OCTOBER 1872, price 18. 6d., contains :

ON BOG MOSSES. By R. Braithwaite, M.D., F.L.S.
REPLY TO FURTHER REMARKS OX TOLLES' Ach And

POWELL AND LEALAND'S IMMERSION 'ath. By, Dr.

J.J. Woodward, U.S. Army.
ON THE ACTIVE PART OF THE NERVE FIBRE AND OP

THE PROBABLE NATURE OF THE NERVE CURRENT.

By Lionel S. Beale, F.R.S. &c.
ON THE REGENERATION HYPOTHESIS. By Dr. Louis

Elsberg, of New York,

ON THE HISTORY, HISTOLOGICAL STRUCTURE, AND

AFFINITIES OF NEMATOPHYCUS LOGANI, CARR
(Prototaxitcs Logani, Dawson), AN ALGA OF Devo-

VIAS AGE, By Wm. Carruthers, F.R.S. &c.
ON THE USE OF MONOCHROMATIC SUNLIGHT AS AN

AID TO HIGH-POWER DEFINITION, By Dr. J. J.

Woodward, U.S. Army.
ONE OF OUR CUSIMON MOxAds. By Prof. Albert H.

Tuttle.

London : ROBERT HARDWICKE, 192 Piccadilly.

RUPTURES (By Royal Letters Patent).
WHITE'S MOC-MAIN LEVER TRUSS,

Perfected and Exhibited in the Great Exhibitions, 1851 & 1862,

S allowed by upwards of 500 Medical Gentlemen to be the most effective invention in the cars

tive treatinent of HERNIA. The use of a steel spring, so often hurtful in its effects, is here
avoided; & soft bandage being worn round the body, while the requisite resisting power is
supplied by the MOC-MAIN PAD AND PATENT LEVER, fitting with so much ease and
closeness that it cannot be detected, and may be worn during sleep. A descriptive circular may
be had, and the Truss (which cannot fail to fit) forwarded by post, on the circumference of the
body (two inches below the hips) being sent to the
Manufacturer, Mr. WHITE, 228 Piccadilly, London,

Price of a Single Truss, 168., 218., 26s. 6d., and 31s. 6d.-Post Free.
Price of a Double Truss, 318. 6d., 428., and 52s, 6d.-Post Free.

Price of Umbilical Truss, 42s, and 528. 6d.-Post Free.
Post-office Orders to be made payable to JOHN WHITE, Post Office, Piccadilly.

NEW PATENT

ELASTIC STOCKINGS, KNEE-CAPS, &c.

For VARICOSE VEINS, and all cases of WEAKNESS and SWELLING of the LEGS, SPRAINS, &c. They are porous, light in texture, and inexpensive, and are drawn on like an ordinary stocking.

Price 4s. 6d., 78. 6d., 10s., and 16s. each.-Post Free,
Manufacturer, JOHN WHITE, 228 Piccadilly, London, W.

BY ROYAL

COMMAND.
JOSEPH GILLOT T’S

STEEL PENS.
Sold by all Dealers throughout the World.

CELEBRATED

Every Packet bears the Fac-simile

of his Signature,

es

xullott

SECOND-HAND MICROSCOPES

By Rowell & Lealand, Ross, Collins, Crouch, Smith, and Beck. ASTRONOMICAL & TOURIST TELESCOPES

By ROSS, DOLLOND, DIXEY, and TULLY.
RACE, FIELD, OPERA, AND MARINE GLASSES,

By Voigtländer, Ross, Dollond, Callaghan, Pillischer, and Dixey.
CIMERAS AND LENSES BY DALLMEYER, ROSS, VOIGTLÄNDER, ERUBB, AND DEROGY.

AMATEUR PHOTO SETS, from Two Guineas.
THEODOLITES, LEVELS, SEXTANTS, AND QUADRANTS, BY TROUGHTON & SIUMS,

Elliott, PARNELL, SPENCER, BROWNING & Co. MAGIC AND DISSOLVING VIEW LANTERNS AND SLIDES,

By Carpenter & Westley, Newton, g'c.

AMATEUR SETS, FROM Two GUINEAS. SURGICAL INSTRUMENTS by Weiss Coxeter, Savigny, Matthews, and Evans. CORNETS, FLUTES, CONCERTINAS, MUSICAL BOXES,

By Distin, Rudall & Rose, WHEATSTONE, and NICOLE FRÈRES.

WILLIAM LAWLEY'S, 78 FARRINGDON STREET, CITY, E.C. SEPARATE CATALOGUES FORNARDED ON RECEIPT OF FOU? STAMPS EACH.

N.B.-SHIPPING ORDERS PROMPTLY EXECUTED.

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'HAS MORE THAN A EUROPEAN REPUTATION," And is important to all, more especially those who have charge of others, to Travellers, English Ministers, British Consuls, and Europeans seeking to reside

in Tropical and Foreign Climates. It is fonnd pre-eminently beneficial in preventing and caring SMALLPOX by Purifying and Vitalising the Blood. Any person who has already this complaint should take it, and be kept in a cool and darkened room, to prevent its leaving any trace on the features,

'It cures the worst form of ordinary or Sick Headache in ten minutes.' Taken as a morning or evening draught it is most agreeable, invigorating, and cooling; it removes bilious affections, heartburn, and acid eructations, in a marvellous manner.

Her Majesty's Representative, the Governor of Sierra Leone, in a Letter of Request for an additional supply of the PYRETIC SALIXE, states :-- It is of GREAT VALUE, and I shall rejoice to hear it is in the bands of all Europeans visiting the Tropics.' SICKNESS, HEADACHE, and NAUSEA are in most cases immediately relieved by ta

ately relieved by taking a teaspoonful in s tumbler of cold water. This can be repeated once or twice in two hours, if needful,

SEA VOYAGES.-It is a very valuable accompaniment, and should on no account be omitted. It instantly allays the sea or bilions sickness.

For BILIOUS CONSTITUTIONS, giving rise to vitiated secretions, Indigestion, and Eruptions on the Skin, teaspoonful should be taken daily with the dinner in a tumbler of water, and the same quantity on going to bed.

A spurious Preparation having been palmed upon the Public, it is needful to notice the Trade Mark on the top right and left-hand corners of the Wrappers.

• RAWALPINDEE, PUNJAB, INDIA, 281h March 1871. On the recommendation of several officers who had some of your Pyretic Saline in the West Indies, all of whom speak in the highest terms of it, we were induced to try it for the first time in this Province. This result was not due to any novelty in Introducing a new medicine, but solely from the ascertained merits of your preparation after use in the fever-stricken districts by which we are surrounded, and we firmly believe that the use of your Pyretic Saline will do more to PREVENT fever than all the Quinine ever imported can cwe. We write thus strongly, because. bot) from persi nu experience and cbservation, we believe we have at length found a remedy against the ever-present fevers of these parts, which costs the British nation hundreds w Saluable lives in Peshawur alone.

• We are now willing to enter into special terms for large and continued supplies, &c.' May be obtained of the Proprietor, HENRY LAMPI OUGH, Consulting Chemist,

113 Holborn, E.C. (second door from Hatton Garden), Londor

Sold by all respectable Chemists, in bottles, 28. 6d., 4s. 6d., 11s., and 21s.
'HAVE IT IN YOUR HOUSES TO SECURE THESE BENEFITS.'

MANUFACTURER OF

HENRY CROUCH, 51 LONDON WALL, LONDON, E.C. BINOCULAR AND MONOCULAR MICROSCOPES,

OBJECTIVES, AND ACCESSORIES, s supplied to CAMBRIDGE UNIVERSITY, ST. BARTHOLOMEW's UNIVERSITY COLLEGE, King's

COLLEGE, St. Mary's, and London HOSPITALS, Sydney UNIVERSITY, &c. &c. BOUCH'S NEW f-in. OBJECTIVE, with both dry and immersion anteriors, giving perfect

definition. CROUCH'S UNIVERSAL PARABOLIC ILLUMINATOR. CROUCH'S CONCENTRIC ROTATING GLASS STAGE.

Purticulars on application,

THE LONDON WARMING & VENTILATING COMPANY

(LIMITED)
23 ABINGDON STREET, WESTMINSTER, S.W.

12 BOULEVARD ST. MARTIN, PARIS.

AND

Managing Director and Secretary, Mr. WOODCOCK.

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Churches, Greenhouses, Offices, and Buildings of every description, warmed by means of a modification of the Plan successfully used by Sir Goldsworthy Gurney in both Houses of Parliament. Extracts from Reports on Paris Universal Exhibition.

TESTING HOUSES, Vol. IV., page 83. These figures shew that the Gurney Company Stove gave out rather more than nine-tenths of the heat due to the combustion of a given quantity of coke, whereas some others gave scarcely half of that quantity.'

The cost is less and the effect greater than that of any other known plans.

The apparatus may be - seen at work in the Houses

of Parliament, the Omces of Hur

the Department of Science and Art, in St. Paul's, Yek Minster, and 13 other Cathe drals, besides 1,000 Churches in England, and Govere ment and other Public and Private Buildings too nome rons to name in an adver

tisement. Particulars and Testimonials forwarded on application,

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MAGIC & PHANTASMAGORIA

LANTERNS, Dissolving View Apparatus, With Oxycalcium, Oryhydrogen, or

Eleciric Light. PHOTOGRAPHED AND COLOURED

SLIDES, Including Views of France, Italy, Switzer. land, Rome, Pompeii; English, Welsi, and Scotch Scenery; Copies of Pictures, Drawings by Gustave Doré; Diagrams to illustrate recent discoveries in Spectrums Analysis and other branches of Observa

tional Astronomy. STATUARY, PHOTO-MICROGRAPHS.

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Illustrated Lists, with full descriptions, ce

application.

CONTENTS.—No. XLVI.

PAGE

THE HYDROID MEDUSÆ. By the Rev. Thomas Hincks, B.A., F.R.S.

Plate LXXXVIII. ... ... ... ... ... ... ... 337 THE FIRST CHAPTER OF THE GEOLOGICAL RECORD. By David

Forbes, F.R.S., &c. ... ... ... ... ... ... ... 350 ELECTRICAL SIGNALLING AND THE SIPHON RECORDER. By J. Munro,

Assistant to Sir W. Thomson ... ... ... ... ... ... 358 SPONTANEOUS MOVEMENTS IN PLANTS. By Alfred W. Bennett, M.A.,

B.Sc., F.L.S. Plate LXXXIX. ... ... ... ... ... 368 NEWS FROM THE STARS. By Richard A. Proctor, B.A. (Cambridge),

Hon. Sec. R.A.S., Author of “The Sun,” “ Essays on Astronomy," “Other Worlds,” &c. ... ... ... ... ... ... ... 381 LJFE-FORMS OF THE PAST AND PRESENT. By Henry Woodward,

F.G.S., F.Z.S., of the British Museum. Plates XC. and XCI. ... 391

REVIEWS:

Lyell's Principles of Geology-Patterns for Turning—The Smith-
sonian Report Disease Germs—Half-Hours on the Shore—The
Martyrdom of Man-Short Notices ... ... ... ... ...

405

SCIENTIFIC SUMMARY :

Astronomy- Botany— Chemistry-Geology and Palæontology-
Medical Science Microscopy—Mineralogy, Metallurgy, and Mining
-Physics—Zoology and Comparative Anatomy ... ... ... 414

No notice can be taken of anonymous contributions. Contributors must write their names and addresses on the first page of MS. If accompanied with stamps, unsuitable manuscripts will always be carefully returned.

The Editor does not hold himself identified with the opinions expressed in contributions.

All communications to the Editor are to be addressed to 192 Piccadilly.

· Articles in the POPULAR SCIENCE REVIEW are Copyright, and the Right of

Translation is Reserved.

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