Page images
PDF
EPUB

pearance of a grating could be produced in the field of to have been from north-north-east to south-south-west, the microscope without there being anything on the stage. , and the same direction is given by Schenck from near The lines sren were achromatic interference bands pro the junction of the Orange and Vaal Rivers. During 1904 duced with the help of two of Thorp's gratings of equal outliers of the Conglomerate were found farther north, . pitch placed behind the objective.-Mr. Rousselet directed near the junction of the Elands and Olifants Rivers.--On attention to a living specimen of Plumatella punctata new Oolitic strata in Oxfordshire : E. A. Walford.--The (Hancock) sent by Mr. Hood, of Dundee. The rare fresh- causes of variegation in Keuper Marl and in other calcarewater polyzoon has apparently not been recorded in ous rocks : G. T. Moody. The author concludes that the England since its discovery by Hancock in 1850. It differs variegation of the Keuper Marls and of other calcareous from other species of Plumatella mainly in having a soft, rocks has been brought about by the percolation of chalytransparent ectocyst.A communication by Mr. E. M. beate water through the light-coloured mass, the more Nelson on the tubercle bacillus was taken as read. porous parts of which have in consequence become stained Mr. A. E. Conrady gave a résumé of his second paper

with ferric oxide, while the harder and more crystalline on theories of microscopic vision. In his former paper parts, being non-porous, have remained unchanged. The he dealt with the formation of the image of a simple

uniformity in distribution of ferric oxide in some red plane grating, showing that it could be fully accounted rocks, such as the New Red Sandstone, suggests that the for on the basis of Abbe's theory. In the present paper iron contained in them has probably been derived from he considered more complicated structures, such as dot chalybeate water in a similar manner. and cross-line patterns.

Challenger Society, June 28.—Dr. R. N. Wollenden

| in the chair.-Dr. H. R. Mill exhibited the new chart Geological Societv, June 21.–Dr. J. E. Marr, F.R.S.,

of the world, recommended by the International Geopresident, in the chair.–The relations of the Eocene and

graphical Congress, and published at the cost of the Prince Cretaceous rocks in the Esna-Aswan reach of the Nile

of Monaco. From 72° N. to 72° S. are sixteen sheets on Valley: H. J. L. Beadnell. At the meeting of the Inter

Mercator's projection ; each polar chart of four sheets is national Geological Congress held in Paris in 1900, the

on a circular projection. The submarine contours and author brought forward evidence from the Baharia Oasis

soundings are in metres, symbols indicating the bottom and Abu Roash to show that there was a marked un

deposits. The land is black; the contours of the ocean conformity between these two systems in the northern

are coloured in deepening shades of blue. Meridians (from part of the country. The Jebel-Awaina succession shows

Greenwich) and parallels are ruled for each degree.--Dr. that in the southern part of the country, where the l'pper

W. T. Calman exhibited the two Decapoda brought from Cretaceous and the Lower Eocene occur in their fullest

the Antarctic region by the Discovery, Cranson antarcticus development, there is no sharp line of demarcation between

and Chorismus antarcticus, and explained their bearing on the Cretaceous and the Tertiary, and no disturbances in

“bipolarity." -The Secretary showed a chart reprothe stratigraphical succession. This is confirmed by the

duced in line-process from one of the society s blank succession in the Kharga Oasis, where there is no trace

charts, in order to show the method of preparation.--On of an unconformity. Dr. J. Ball's conclusions to the con

behalf of Messrs. E. W. L. Holt and W. M. Tattersall, frary were mainly based on the supposed irregular varia

Dr. Calman read a preliminary note on the Antarctic tion of the Esna Shales; but, where this occurs, it is

Schizopoda captured by the Discovery. The collection conmainly due to the fact that, with a slight increase of

tained several new species of Euphausiidæ and Mysidæ, carbonate of lime, these beds became almost indistinguish

and the authors were able to show that Euphausia able from the overlying marls and marly limestones of

superba (Dana), Sars, E. Murrayi, Sars, E. australis, the Eocene. The author finds in Jebel Nur el Ghenneiem

Hodgson, E. glacialis, Hodgson, and E. antarctica, Sars, some 180 feet of green clays between the Echinocorys

are all referable to a single species.--The Secretary read (halk and the Eocene marls and limestones, and a per

a note on the probable time required by the larva of an fectly conformable succession throughout. Near Ain Amur

epibenthic animal to cross the Atlantic, and made some there is a considerable development of fossiliferous lime

remarks on the desirability of revising the nomenclature stones at the summit of the Cretaceous rocks, and many

of ocean currents on an international basis. of the fossils are hardly distinguishable from Eocene species. The author is of opinion that the Farafra sur

Paris. cession falls into line with that which obtains in the Academy of Sciences, July 3.-M. Troost in the chair. southern part of the country. An important piece of — The theory of algebraic surfaces : Émile Picard.—The confirmatory evidence is furnished by the discovery of a propagation of waves along a liquid compressible column, rich fauna in "ashen-grey clays " in the Esna-Aswan composed of strips of unequal velocities and filling an reach of the Nile Valley by Dr. W. F. Hume, in the elastic horizontal tube, without longitudinal tension: J. (lay's above the Pecten-Marls in the neighbourhood of Boussinesq.-On camphoacetic and B-camphopropionic Esna.- contribution to the study of the Glacial (Dwyka) | acids : A. Haller Methyl camphocarbonate heated with Conglomerate in the Transvaal ; E. T. Mellor. The survey sodium methylate and iodoacetic ester gives methyl carbof a district lying east of Pretoria and extending from | oxymethylcamphoacetate, which, with alcoholic potash, near the diamond-fields to Middelburg has recently furnishes camphoacetic acid. A corresponding compound afforded much additional information with regard to the is obtained by substituting ethyl B-iodopropionate for the Glacial Conglomerate in this part of South Africa. The ethyl iodoacetate in the original reaction, and from which district lies on the northern edge of the principal area B-camphopropionic acid is obtained.-On the existence in Ocupied by the Karroo system, and includes a number of the black elder of a compound furnishing hydrocyanic outliers, the area between which affords information as acid : M. Guignard. The number of plants from which to the source of the material of the Conglomerate and hydrocyanic acid can be obtained is increasing every year, the character of the land-surface on which it was de and it has been suggested that it represents the first posited. This surface is smoothed, grooved, and scratched recognisable product of the assimilation of nitrogen in bor ice-action. The Karroo system is here only 400 or plants. In the elder, the fresh leaf furnishes the largest fra feet thick, and the Conglomerate usually about 50 proportion of the acid, averaging 0.01 per cent.--Synthesis ipet, but, where deposited in hollows, it may reach 200 of the three tertiary dimethylcyclchexanols and of the ferf or more in thickness. The fragments are usually from hydrocarbons connected with them : Paul Sabatier and Į to 3 feet in diameter, but may attain as much as 8 or A. Mailne. The cresols are converted into methylcyclo10 feet; they are often facetted and sometimes show hexanones by means of the reduced nickel reaction, and siriations. The majority of the boulders are of local these are converted by methylmagnesium iodide into the Corigin. Trur bedding-planes are rare in the conglomerate, 1 corresponding tertiary alcohols, good vields being obtained. but there are included patches of sandstone, mudstone, or | The preparation, physical properties, and reactions of the

hale, some of which show ripple- or eddy-markings. The ortho-, meta-, and para-tertiary alcohols are described.sirixe are remarkably constant in direction, and they and | On the evolution of the tertiary mammals. A reply to the transport of boulders indicate an ice-movement from the observations of M. Boule : Charles Depéret. A conthe north-north-west to the south-south-east. In the i troversial note dealing more especially with the ancestry Prieska district Rogers and Schwarz found the movement of the horse and bear.-V. P. Curie was elected a member

... 242

in the physical section in the place of the late M. A. of amines, the result being 1/700 lower than the figure of Potier. On the specific inductive power of metals in the M. Leduc. The limiting densities for these gases were case of the calorific and luminous waves : André Broca. worked out, and the atomic weight of nitrogen deduced The author concludes that the hypothesis of the existence as 14.006.—The thermochemistry of neodymium : Camille of a considerable specific inductive power for the metals, Matignon.-The influence of the elements of brown flour although perhaps not sufficient to explain all the optical on the extraction of the gluten and bread-making: M. properties of metals in detail, is at least no more in con Lindet and L. Ammann.-On the cause of the withering tradiction with the facts than the hypothesis of Planck of the vines in Tunis, Algeria, and the Midi: L. Ravaz. that this specific inductive power is zero.-An apparatus -On the presence of a hydrocyanic glucoside in the for measuring the factors, penetration, and quantity of leaves of the elder, Sambucus nigra: Em. Bourquelot X-rays, and a radiophotometric totaliser : G. Contre and Em. Danjou. The elder leaf contains a glucoside moulins Silver plates of varying thicknesses are fixed containing nitrogen, which, under the influence of on to rotating sectors, and the effect of interposing these emulsin, gives glucose, hydrocyanic acid, and an in the path of the rays upon a phosphorescent screen is aldehyde.- Modifications and role of the segmentary noticed.-The magneto-optical properties of ionoplastic organs in some annelids : Louis Fage.--On the iron : L. Houllevigue and H. Passa.-A method for epipodites of the Eucyphote Crustacea : H. Coutière. establishing coloured screens, destined to isolate certain On the discovery of coal at Abaucourt (Meurthe-etgroups of special radiations : F. Monpillard. A given Moselle): René Nicklès. A layer of coal, 2.65 metres weight of a colouring matter is diluted to a certain volume thick, has been found at Abaucourt, near Nomeny. It is with an aqueous solution of gelatin, and this poured on at a depth of 896 metres, and on chemical analysis proves to a glass plate of fixed area, thus giving an invariable to resemble the gas coal of Saarbrück.–Observations on weight of colour per square centimetre. The author has the preceding note : R. Zeiller.-On the geology of the succeeded in producing screens giving a maximum of Pre-alps in the neighbourhood of Jaen : Robert Douvillé. luminosity in the green (1 530), yellow orange (1 588), -Contribution to the tectonic of the southern Carpathians : yellow (1 500), and red (1 630).—The preparation of binary G. M. Murgoci. On the origin of lactose. The ablation compounds of metals by thermochemical reactions : A. of the mammæ in lactation : Ch. Porcher.-The fixation Colani. Some examples of the application of aluminium of chemical substances on living cells : MM. Charrin and powder for reduction at a high temperature; the products Le Play. are usually contaminated with aluminium and sometimes with iron.—The constitution and properties of the aluminium steels : Léon Guillet. So long as the percentage of aluminium is below 2 per cent., there is no marked

CONTENTS.

PAGE change in the properties of the steel. Up to 15 per cent. the aluminium enters into solution in the iron, the iron

The Popularisation of Science. By W. R. .... 241 aluminium solution thus formed not dissolving carbon.-- | Theoretical Geodesy. By Captain W. J. Johnston, Combinations of ferrocyanides and sulphuric acid : Paul R.E. . Chrétien. Hydroferrocyanic acid, dissolved in sulphuric

Our Book Shelf :acid without any gas being evolved, forms a sulphonic acid of the composition H, FeCy.(SO,H). With fuming

Vacher : “ The Food Inspector's Handbook."-C. S. 243 sulphuric acid another compound is produced, FeCy,So,,

Marro: “Manuale dell'Ingegnere Elettricista " . .243 the decomposition and reactions of which have been

Smith: “ Poisonous Plants of all Countries" .... 243 studied.-A modification of the initial quality of iron and Letters to the Editor:steel used in the manufacture of rivets consequent on the The Constant of Radiation as Calculated from Moleheating required in fixing : Ch. Frémont. It is found

cular Data.—The Right Hon. Lord Rayliegh, that the metal, after being heated and cooled under traction, is improved in quality mechanically.-On the acid

O.M., F.R.S... ........ .... 243 g-aldehydes : E. E. Blaise and A. Courtot. The authors Proposed Observation of Mercury during the Solar have been successful in obtaining these aldedydes in a pure Eclipse. - Dr. G. Johnstone Stoney, F.R.S. 244 state for the first time. An unsaturated acid is treated

The Planet Uranus.-W. F. Denning ...... 244 with bromine, the dibromo-acid formed heated, a bromo

The Exploration of the Atmosphere above the lactone being then formed by the loss of hydrobromic acid. Hydrobromic acid is then removed from this by

Atlantic.-A. Lawrence Rotch ... boiling with quinoline, and the lactone thus produced, Ancient Antarctica.- Captain F. W. Hutton, hydrolysed with an alkali, gives the acid aldehyde required.

F.R.S.................... 244 .-The synthesis of the lactone of erythric acid : M.

The British Slugs.- Prof. T. D. A. Cockerell .. 245 Les pieau.-A new method of synthesis of the monoatomic

Notes on Stonehenge, VII.-Ou the Dartmoor and polyatomic alcohols : V. Grignard. This important synthesis has been achieved by the author by acting with

Avenues. (Illustrated.) By Sir Norman Lockyer, organometallic derivatives of the type RMgX on the

K.C.B., F.R.S. ................. halogen derivatives of the mono- or poly-atomic alcohols. Solar and Terrestrial Changes . . . The reaction takes place in two stages,

The Proposed College of Applied Science . . RMgX+CICH..CH,OH=RH+CICH,CH,.OMgX,

. . 250

Notes . . . . . . . and this on heating gives with a fresh molecule of a

. . . . . . . . . . . . . . magnesium compound

| Our Astronomical Column:R'MgX' +CICH,.CH,OMgX=

July and August Meteors ..... ....... MgX CI+ R' CH..CH,.0MgX.

The Formation of the Martian Snow-caps. ... The action of water on this last substance gives the alcohol Recent Observation of Eros . ........... R.CH.CH,OH. Several examples of the application of Standard Time in Various Countries ....... this synthetical method are given.-On B-decahydro Harvard College Observatory Annual Report . .. naphthylketone and B-decahydronaphthylamine : Henri

The Academic Side of Technical Training. By Dr. Leroux.-Some new derivatives of the mesoxalic esters : Ch. Schmitt.—The action of ethyl iodide on sparteine :

Alex. B. W. Kennedy, F.R.S. Charles Moureu and Amand Valeur. The reaction gives

Harvey and the Progress of Medical Science. By sparteine iodohydrate and two isomeric iodoethylates. Dr, Frederick T. Roberts . ........... 258 The densities of carbonic anhydride, ammonia, and nitrous High Temperature Research on the Felspars. oxide : Philippe A. Guye and Alexandre Pintza. The

(Illustrated.) By A. H. results for the densities of nitrous oxide and carbon dioxide

.......... .. agree with those of Lord Rayleigh within the limits of

Primitive Religious Art. By A. C. H. ....... experimental error, 1/6000 to 1 19,000. Special precautions

| University and Educational Intelligence..... were taken in the case of ammonia to ensure the absence Societies and Academies. (Illustrated.) ...... 261

[ocr errors]
[ocr errors]

.

.

.

.

.

[ocr errors]

The New Manifolding Hammond Typewriter.

By using ...

THE SYTAM Bottle &Specimen Partette

IN YOUR
LABORATORY, MUSEUM,

STOREROOM, &C.,

you can save ths of your wall space and find what you want on the instant.

IN THE SYTAM SYSTEM

One hundred 4 oz. bottles occupy less than one square foot of wall space; each bottle is instantly located, removed or replaced, and any size from 1 oz. to a Winchester can be accommodated in the same sized Element.

WRITE FOR THE BROWN LIST

TO THE

A Hammond Typewriter will do anything any other typewriter does-and do it better. Beside, it has twenty exclusive features, not one of which is possessed by any other writing machine. WHY is the Hammond the Best Machine for Stenographers?

BECAUSE
Perfect and Permanent

Alignment,
Work in Sight,
Manifolding,
Speed,
Durability,
Noiselessness,
Interchangeable Type,
Light Elastic Touch,
Perfect Paper Feed,

Any Width Paper,
are essential requisites, and the Hammond

possesses them all. 1 On account of the TYPE being interchangeable, it is most

useful to SCIENTIFIC work. Call and test Machine or write for Catalogue, free on application to :The Hammond Typewriter Co.,

50 QUEEN VICTORIA ST., E.C. MANCHESTER BRANCH: 164 DEANSGATE, MANCHESTER. DO YOU WISH BEWARE OF

FEEBLE
B TO BE

IMITATIONS
UP TO DATE
in Scientific Demonstrating ?
If so, send for our full descriptive pamphlet of

the Kershaw. Patent Lantern (Stroud and Rendall's and Kershaw Patents), made of best seasoned mahogany, French polished, lined with asbestos and Russian iron. Fitted with two double achromatic objectives, 90° silvered prism, complete with B.T. or mixed jet, in travelling case, measuring

23" X 16" x 9".
ALL ACCESSORIES SUPPLIED. ARC LAMPS, RESISTANCES,

STANDS, &c.
SOLER A. KERSHAW, Dorrington St., Leeds.

CONTRACTOR TO H.M's GOVERNMENT.

[graphic]

SYTAM FITTINGS CO., 18 & 19 BASINGHALL BUILDINGS,

LEEDS.

MARCONI'S WIRELESS TELEGRAPH CO.,

[graphic]
[ocr errors][graphic]

MAKER

LABORATORIES FURNISHED

MANUFACTURERS OF High-Class Apparatus for Röntgen Ray and High Frequency Work.

10", 12" & 14" INDUCTION COILS. PORTABLE HOSPITAL SETS,

SWITCHBOARDS, &c., &c. Descriptive Price List Free on Application to 18 Finch Lane, London, E.C.

Chemical, Physical, and all Science Laboratories completely equipped with Benches, Fume Chambers, Cupboards, &c., and Scientific

Apparatus of every description. SEND SPECIFICATION FOR OUR PRICES. We also supply Sinks, Gas and Water Fittings

specially designed for Science Laboratories.

A. GALLENKAMP & CO., LTD.,

19 & 21 Sun Street, Finsbury Square, LONDON, E.C.

MACMILLAN & CO.'S BOOKS FOR STUDENTS OF BOTANY. THE LIFE HISTORY OF BRITISH FLOWERING PLANTS.

By the Rt. Hon. Lord AVEBURY, P.C., D.C.L., &c. Illustrated. 8vo. [Shortly.

A TEXT-BOOK OF BOTANY. By Dr. E STRASBURGER, Dr. FRITZ NOLL, Dr. H. SCHENCK, the late Dr. A. F. W. SCHIMPER. Translated from the German by H. C. PORTER, Ph.D. Revised with the Fifth German Edition by W. H. LANG, M.B., D.Sc.,

Senior Assistant in Butany, University of Glasgow. With 636 Illustrations, in part coloured. Medium 8vo. 18s. net. BOTANY FOR BEGINNERS. By EXPERIMENTS WITH PLANTS.

ERNEST EVANS. 4th Impression. Globe 8vo. 25. 6d. By Prof. W. J. V. OSTERHOUT, Ph. D. Crown 8vo. PRACTICAL BOTANY for BE- 1 - 55. net.

GINNERS. By Prof. F. O. BOWER. SC.D. E.R.S., and 1 BIOLOGICAL LABORATORY D. T. GWYNNE-VAUGHAN, M.A. Second Edition. METHODS. By P. H. MELL, Ph. D. Crown 8vo. Globe 8vo. 35. 6d.

6s. 61, nel. LESSONS in ELEMENTARY INTRODUCTION to THE STUDY

BOTANY. By DANIEL OLIVER, F.R.S. With OF SEAWEEDS. By GEORGE MURRAY, F.R.S.E. numerous Illustrations. Fcap. 8vo. 45. 60.

Illustrated. Crown 8vo. 75. 6d. FIRST BOOK of INDIAN BOTANY. I TIMBER and some of its DISEASES.

By DANIEL OLIVER, F.R.S. With numerous Illustra By H. MARSHALL WARD, D.Sc., F.R.S., F.L.S. tions. Globe 8vo. 6s. 6d.

With Illustrations. Crown 8vo. 6s. [Nalure Series. BOTANY. An Elementary Text for DISEASE. IN PLANTS. By Schools. By L. H. BAILEY. With nuinerous Illustra. |

H. MARSHALL WARD, D.Sc. Crown 8vo. 75. 6d. tions. Extra Crown 8vo. 65. BOTANY. By Sir J. D. HUOKER.

TIMBER and TIMBER TREES, F.R.S. With Illustrations. Poit 8vo. Is.

Native and Foreign. By THOMAS LASLETT, Timber

Inspector to the Admiralty. Second Edition. Revised by The STUDENT'S FLORA of the Prof. H. MARSHALL WARD, F.R.S. Crown 8vo. 85. 6.

BRITISH ISLANDS. By Sir J. D. HOOKER, F.R.S. THE NATURE AND WORK OF Third Edition. Globe 8vo. 1os. 6d.

PLANTS. An Introduction to the Study of Botany. By STRUCTURAL BOTANY:or Organ D. T. MACDOUGAL, Ph.D. Crown Svo. 45. 6d.

ography on the Basis of Morphology. To which is added FLOWERS FRUITS and LEAVES. The Principles of Taxonomy and Phytography, and a Glossary of Botanical Terms. By ASA GRAY. 8vo. By LORD AVEBURY. With numerous Illustrations, ros. 6d.

6th Impression. Crown 8vo. 45. 6d. (Nature Series. BOTANICAL TABLES. By A. B. On BRITISH WILD FLOWERS. BUCKLEY. . Fcap. 8vo. Is. 6d.

considered in Relation to Insects. With numerous IllustraFIRST LESSONS in PRACTICAL tions. By LORD AVEBURY. Crown 8vo. 45. 6t.BOTANY. By G. T. BETTANY, M.A., B.Sc., F.L.S.

[Nature Series. Pott 8vo. Is.

| FLOWERS AND FERNS in their THE TEACHING BOTANIST. AI HAUNTS. By MABEL OSGOOD WRIGHT. Illus

Manual of Information upon Botanical Teaching, with an trated. Extra Crown 8vo. 1os. 6d. net. outline for a general course. By WILLIAM F. GANONG.

THE HERB OF THE FIELD. By Crown 8vo. 55. A UNIVERSITY TEXT-BOOK OF:

CHARLOTTE M. YONGE. Crown 8vo. 55.. BOTANY. By Prof. DOUGLAS HOUGHTON CAMP VEGETABLE CULTURE. A Primer

BELL, Ph.D. With many Illustrations. 8vo. 175. net. for Amateurs, Cottagers, and Allotment Holders. By LABORATORY PRACTICE FOR '.

ALEXANDER DEAN, F.R.H.S. Edited by J. WRIGHT, BEGINNERS IN BOTANY. By W. A. SETCHELL,

With Thirty-eight Illustrations. Pott 8vo. Is. Ph. D. Fcap. 8vo. 45. 6d. net.

A PRIMER of PRACTICAL HORTIThe BOOK of the ROSE. By the late CULTURE. By J. WRIGHT, F.R.H.S. Pott 8vo. 1s. Rev. A. FOSTER-MELLIAR. Illustrated. Third

GARDEN FLOWERS and PLANTS. Edition. Crown 8vo. 65.

A Primer for Amateurs. By 1. WRIGHT, F.R.H.S. CYCLOPÆDIA OF HORTICUL

With Fifty Illustrations. Poti 8vo. 15.
TURE. By Prof. L. H. BAILEY, assisted by WILHELM
MILLER and many Expert Cultivators and Botanists.

GREENHOUSE AND WINDOW Illustrated with over 2000 Original Engravings. In Four PLANTS. By CHARLES COLLINS. Edited by J.. Vols. Imperial 8vo. Vol. I., A.-E. Vol. II., F.-M., Wright, F.R.H.S. With Thirty-eight Illustrations. . Vol. III., N.-Q., Vol. IV., R.-Z. 215. net each.

Pott 8vo. 15. BRITISH FOREST TREES and their THE CHEMISTRY of the GARDEN.

SYLVICULTURAL CHARACTERISTICS and A Primer for Amateurs and Young Gardeners. By HER TREATMENT. By JOHN NISBET, of the Indian BERT H. COUSINS, M.A. With an Introduction by Forest Service. Crown 8vo. 6s. net.

J. WRIGHT, F.R.H.S. Pott 8vo. Is.

WATKINS & DONCASTER,

BIRK BECK BANK

PHENIX
ASSURANCB COMPANY, LIMITED,
FIRE OFFICE,

Naturalists and Manufacturers of 19 LOMBARD ST., E.C., and 57 CHARING CROSS, S.W.

CABINETS AND APPARATUS ESTABLISHED 1782.

FOR ENTOMOLOGY, BIRDS' EGGS AND SKINS, AND ALL Moderate Rates. Absolute Security Electric

BRANCHES OF NATURAL HISTORY.
Lighting Rules Sapplied. Liberal Loss Settlements.

SPECIAL SHOW-ROOM FOR CABINETS.
Prompt Payment of Olaims.
LOSSBS PAID OVER £28,000,000.

N.B.-For Excellence and Superiority of Cabinets and Apparatus, refer-
ences are permitted to distinguished patrons, Museums, Colleges, &c.
A LARGE STOCK OF INSECTS, BIRDS' EGGS AND SKINS.
SPECIALITY.-Objects for Nature Study, Drawing

classes, &c.
ESTABLISHED 1851.
Current Accounts. 2% Interest allowed on minimum

Birds, Mammals, &c., Preserved and Mounted by First-class monthly balances when not drawn below £100.

Workmen true to Nature. Deposits. 21% Interest allowed on Deposit Accounts.

All Books and Publications on Natural History supplied. Advances made, Stocks and Shares bought and sold.

36 STRAND, LONDON, W.C. Apply C. F. RAVENSCROFT, Secretary, Southampton Buildings, High Holborn, W.C.

(Five Doors from Charing Cross.)

IF New Catalogue (102 pp.) just issued, post free. NO WAY. - S.Y. “MIDNIGHT SUN.” 3,178 Tons. Two Berth Cabins. All Berths

MINERALS, ROCKS, FOSSILS. on same level. Finest yachting steamer afloat. Sailing July 22; August 5, 19.

A large stock of BRITISH AND FOREIGN MINERALS always on view. Apply ALBION S.š. co., LTD..

CORNISH MINERALS Newcastle-on-Tyne.

A SPECIALITY.

Special display for Teachers and Students on Saturdays. Open till 7 p.m. TYPE-WRITING UNDERTAKEN BY HIGHLY EDUCATED WOMEN ACCUSTOMED TO SCIEN.

RICHARDS' SHOW ROOMS, TIFIC MSS. (Classical Tripos, Intermediate Arts, Cambridge Higher 3 Beauchamp Place, Brompton Road, South Kensington, Local, thorough acquaintance with Modern Languages). Research,

London, S.W.
Revision, Translation, Scale of charges on application. The Cam.
bridge Type-writing Agency, 10 Duke Street, Adelphi, W.C.

ROCKS, MINERALS, FOSSILS.
For Collectors, Students, Technical Schools, Colleges, &c.

COLLECTIONS IN POLISHED DEAL BOXES.

25 Specimens, 5/6; 50 do., 10/6; 100 do., 21/- ; 200 do., 42/Gentlemen interested in the above study are invited to send to 20 Coal Measure Rocks and Fossils, 12/6; do., larger, 15/-.

Adapted for the Board of Education Examinations in JAMES R. GREGORY & CO.,

Geology, Physiography, and Mineralogy. i Kelso Place, Kensington Court, London, W., A large stock of Minerals, Rocks, Fossils and Microscopic Objects for for a Prospectus of

selection. Specimens sent on approval. THE TWENTIETH CENTURY ATLAS OF

Cabinets, Geologists' Hammers, Chisels, Card Trays, Glass-capped

Boxes, Models of Crystals, &c., &c. MICROSCOPICAL PETROGRAPHY,

NEW CATALOGUE POST FREE. now being issued in Twelve Monthly Parts, each Part containing Four Fine Hall-Tone Plates, and also Four actual Rock Sections.

THOMAS D. RUSSELL, 78 Newgate St., London, E.C. Subscription in advance, either Monthly, 71-; Quarterly, 21/5; or for the whole Series of 12 Monthly Parts & 48 Sections, 64 4s.

[graphic]

MICROSCOPICAL PETROGRAPHY.

CUTTELL'S ROCK CUTTING MACHINE

is the most simple and practical for section cutting, &c., 63 155. Prize Medal Exhibition of Inventions.-19 Abbotstone Road, Putney, S.W.

LIVING SPECIMENS FOR

THE MICROSCOPE.

ON SALE:

Volvox, Spirogyra, Desmids, Diatoms, Amoeba, Arcella, Actinosphærium, Vorticella, Stentor, Hydra, Floscularia, Stephanoceros, Melicerta, and many other specimens of Pond' Life. Price is. per Tube, Post Free. Helix pomatia, Astacus, Amphioxus, Rana, Anodon, &c., for Dissection purposes.

THOMAS BOLTON, 25 BALSALL HEATH ROAD, BIRMINGHAM.

Astronomical Telescope, with 31 in. clear aperture, on expensive mahogany altazimuth stand, 1 day and i astro. eyepiece, in travelling case, price £12. Another 38" by DOLLOND, an excellent object glass, with finder, two Hook's joint handles for slow motions, two eyepieces, altazi. murb stand, cost 630, for £14. Another with 2 in. aperture, on oak tripod altazimuth stand, for £2. Microscopes, Zeiss IVa, with swing. out substage condenser, triple nosepiece, No. 1 and No. 3 eyepieces, objectives " and !" by BAUSCH & LOMB, cost 617 55., offered at £8 10s. WATSON'S " Fram" with substage and Abbé condenser, 2 eyepieces, and 2 objectives, i in. and in., in spotless condition, cost 68 55., offered £6 10s. Student's Microscope, by BAKER, with " and " objectives (a good modern instrument), cost L7 ros., offered at £4 10s. Society of Arts Microscope, with two objectives, live box, forceps, &c., cost £6 45., offered for £2 10s. Objectives, 1" oil immersion, WATSON, N. A. 1.10, ođered at £3 10s. Another' 1" oil immersion. PILLISCHER, £2. Another." oil immersion, GOWLLAND, N. A. 1.30, for £2 10s.

Rev. H. MILLS, Greenside, Kendal.

MARINE BIOLOGICAL ASSOCIATION

OF THE UNITED KINGDOM.

THE LABORATORY, PLYMOUTH. The following animals can always be supplied, either living or preserved by the best methods :

Sycon ; Clava, Obelia, Sertularia ; Actinia, Tealia, Caryophyllia, Alcy.
onium; Hormiphora (preserved); Leptoplana; Lineus, Ampbiporas,
Nereis, Aphrodite, Arenicola, Lanice, Terebella ; Lepas, Balanas,
Gammarus, Ligia Mysis, Nebalia, Carcinus; Patella, Buccinum, Elodone
Pectens Bugula, Crisia, Pedicellina, Holothuria, Asterias Echinus,
Ascidia, Salpa (preserved), Scyllium, Rala, &c., &c.

For prices and more detailed lists apply to
Biological Laboratory, Plymouth.

THE DIRECTOR.

NOTICE.-Advertisements and business letters for NATURE should be addressed to the Publishers; Editorial
Communications to the Editor. The telegraphic address of Nature is “Phusis," LONDON.
SUBSCRIPTIONS TO "NATURE."

CHARGES FOR ADVERTISEMENTS.
& s. d. TO ALL PLACES ABROAD:- & s. d.

& s. d. Yearly . . . . 1 8 0 Yearly . . . . 1 10

106 * Three Lines in Column
6

: 0 2 6 Quarter Page, or Hall

| Per Line after . Hall-yearly

: 0091a Column . . I 150 . , 0 14 6 Half-yearly .

015 6 One Sixteenth Page, or Eighth Col. 10 ° Half a Page, or a Columo 3 5 0 Quarterly . . . o 7 61 Quarterly . . .o 8 o One Eighth Page, or Quarter

Column

: 018 6 Whole Page . . . 660 • The first line being in beavy type is charged for as Two Lines. Cheques and Money Orders payable to MACMILLAN & CO., Limited.

OFFICE: ST. MARTIN'S STREET, LONDON, W.C.

« PreviousContinue »