Slike strani
PDF
ePub

PARIS. Academy of Sciences, October 16.-M. Troost in the chair. On the absolute desiccation of vegetable products: L. Maquenne. It is commonly assumed that when a substance has been heated in an air oven at 100° C. to 120° C. until its weight becomes constant, all the moisture has been driven off. The author shows that this is not the case for substances such as starch and flour. For complete drying, either a current of well dried gas must be passed over the starch at about 120° C., or it must be sealed up in a vacuum with a dehydrating agent for a long period.-Presentation of the twelfth volume of the Mémorial du Dépôt général de la Guerre ": Bouquet de la Grye. This volume includes the measurements of the new meridian of France from the bases of Paris, Perpignan, and Cassel. Attention is directed to the accuracy of the results obtained.-Preliminary note on the observation of the total solar eclipse of August 30 made at Guelma: MM. Bourget and Montangerand. Fifteen photographs were obtained during totality, different coloured screens being interposed. The plates are all good, and show excellent images of the corona and protuberances. -Observations on the total eclipse of the sun of August 30: J. Comas Solá. The observations, which were made at Vinaroz, included three photographs of the corona and of the spectra of the chromosphere.-On functions having a finite number of branches: Georges Rémoundos.-On the calculation of an arch in masonry: M. Auric.-On a phenomenon of cooling observed in silver wires plunged into water and through which electric currents are passing : E. Rogovsky. It is shown that the resistance of the wire depends on the magnitude of the current passing through it, this effect being due to the fact that all parts of the wire are not, under these conditions, at the same temperature. It is necessary, to obtain exact values of the resistance of wires in a liquid at the temperature of this liquid, to extrapolate from a series of observations made with different intensities of current.-On the forms of lightning conductors: G. M. Stanoïévitch. The basic character of pyranic oxygen. Halogen compounds of dinaphthopyryl with metals and metalloids: R. Fosse and L. Lesage. C10H6 The radical dinaphthopyryl, —CH CO, although not C10H6 containing nitrogen, forms a large number of double salts, examples of which with platinum, lead, iron, zinc, tin, bismuth, arsenic, and antimony are given in the present note. On the development of amylase during the germination of seeds: Jean Effront. The sugar-forming and liquefying powers of malt do not develop at the same rate during germination, the former being the more rapid and reaching a maximum, whilst the latter steadily increases with the time of germination.-The measurement of the mechanical work obtainable from Limousin cattle: M. Ringelmann.-On a new flagellated parasite of Bombyx mori (Herpetomonas bombycis): C. Levaditi.

NEW SOUTH WALES.

Royal Society, September 6.-Mr. H. A. Lenehan, president, in the chair.-Reinforced concrete, paper iii. Prof. W. H. Warren. The following matters were dealt with :(a) The adhesion of cement mortar and concrete to steel. (b) The experimental determination of the neutral axis in a plain concrete, and also in a reinforced concrete beam, and the curves of strain for loads increasing from zero to the load producing fracture; the determination of the true form of the stress curve from the actual strain curve in a plain and in a reinforced concrete beam. (c) The safe working stresses and the fundamental equations recommended for the design of reinforced concrete structure. The occurrence of inclusions of basic plutonic rocks in a dyke near Kiama: C. A. Sussmilch.

[blocks in formation]
[blocks in formation]

ENTOMOLOGICAL SOCIETY, at 8.

SOCIETY OF PUBLIC ANALYSTS, at 8.-(1) A Rapid Method for the Deter mination of Tin in Copper-Tin Alloy; (2) Water from the Simplon Tunnel: A. G. Levy.-Notes on (1) Dika Oil; (2) Surin Fat: J. Lewkowitsch. The Determination of Oxygen in Copper: L. Archburi. THURSDAY, NOVEMBER 2.

CHEMICAL SOCIETY, at 8.30.-Solution and Pseudo-solution, part is, Some of the Arsenious Properties of Arsenious Sulphide and Ferk Hydrate: E. Linder and H. Picton.-The Molecular Conductivity Water: P. Blackman.-The Stereoisomerism of Substituted Ammoning Compounds: H. O. Jones.-The Influence of very Strong Electromagnetic Fields on the Spark Spectra of Ruthenium, Rhodium, and Palladium; J. E. Purvis,-Note on the Fluorides of Selenium and Tellurium: E. B. R. Prideaux.-The Constitution of Glutaconic Acid: JF. Thorpe.-Some Alkyl Derivatives of Glutaconic Acid and of 2:6 Diexypyridine: H. Baron and J. F. Thorpe.-Note on the Formation of B-Methylglutaconic Acid and of aß-Dimethylglutaconic Acid: F. V. Darbishire and J. F. Thorpe.

LINNEAN SOCIETY, at 8.-Plant Ecology, interpreted by Direct Response to the Conditions of Life: Rev. G. Henslow.

RÖNTGEN SOCIETY, at 8.15.-The Ruhmkorff Coil: Prof. WertheimSalomonson.

CIVIL AND MECHANICAL ENGINEERS' SOCIETY, at 8.-Sea Defences: Baron H. T. H. Siccama.

CONTENTS.

The Study of Fishes. By H. G.
The Far East.

Absorption Spectra. By E. C. C. B.
Our Book Shelf:-

Watson: "Oblique and Isometric Projection'

Letters to the Editor:

Eclipse Phenomena.-Sir Oliver Lodge, F.R.S..
Geometry of Position.-Sir Oliver Lodge, F.R.S.
Eclipse Predictions.-Dr. A. M. W. Downing,
F.R.S..

Chelifers and House-flies.-Prof. Sydney J. Hickson,
F.R.S.

The Rudimentary Hind Limbs of the Boine Snakes. -
Frank E. Beddard, F.R.S.

A Rare Game Bird.-Sir Herbert Maxwell, Bart.,
F.R.S..

On a New Species of Guenon from the Cameroons.
Dr. Henry O. Forbes

PAGE

625

626

637

[blocks in formation]

. . 629

629

629

629

629

630

630

630

The Absorption Spectrum of Benzene in the Ultraviolet Region.-Dr. E. C. C. Baly; Prof. J. Norman Collie, F.R. S.

630

Action of Radium Salts on Gelatin.-W. A. Douglas Rudge

631

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small]

"No. 2" SPECTROMETER.

(Diameter of Circle = 8")

The Rotation of the Prism Table and of the Telescope are both read by Vernier on a Platinoid Circle to 30 seconds.

[graphic]

ADAM HILGER, Ltd., 75a Camden Road, London, N.W.

Telegraphic Address:-"Sphericity, London."

AWARDED GOLD MEDAL ST. LOUIS EXHIBITION, 1904.

ILLUSTRATED LIST ("A") OF SPECTROSCOPES AND SPECTROSCOPIC ACCESSORIES CRATIS ON APPLICATION.

ANDREWS'

AWARDED MEDALS WHEREVER EXHIBITED, including 9 at the great Paris Exposition of 1900.

AUTOMATIC VACUUM JAS. J. HICKS

REGULATOR.

[blocks in formation]
[blocks in formation]

OF

Meteorological and Scientific Instruments

OF EVERY DESCRIPTION, INCLUDING

STANDARD MERCURIAL BAROMETERS,
STANDARD ANEROID BAROMETERS,
STANDARD THERMOMETERS of every KIND,
PUMPS BOTH FOR VACUUM & PRESSURE,

Air Meters, Anemometers, Boiling Point Apparatus,
Burettes, CATHETOMETERS, Clinometers, Drawing
Instruments, Eudiometers, Gas, Steam and Water
Gauges, Hydrometers, MICROSCOPES, Plane
Tables, POLARIMETERS, Pyrometers, RANGE
FINDERS, SEXTANTS, Spectroscopes, Sphygmo-
meters, Sunshine Recorders, THEODOLITES, Wind
Vanes, &c., &c., &c.

Catalogues Post Free. (State which required.)

ANY KIND OF SCIENTIFIC INSTRUMENT
MADE TO ORDER.

Prompt Attention to all Orders and Inquiries.

Exceptional Terms to Colleges, Institutions, &c. Quotations submitted for Laboratory Outfits or Single Instruments. THERMOMETERS FOR STUDENT WORK A SPECIALITY.

[blocks in formation]
[graphic]
[blocks in formation]

READING MICROSCOPES, RESISTANCE COILS, &c.

56 CHARING CROSS ROAD, LONDON, W.C.

SPECIAL TERMS TO COLLEGES. SCHOOLS. INSTITUTES, &c.

MACMILLAN & CO.'S LIST.

SECOND AND REVISED EDITION NOW READY.

HANDBOOK OF METALLURGY.

By Dr. CARL SCHNABEL, Professor of Metallurgy.

Translated by Professor H. LOUIS, M.A., A. R.S.M., F.I.C., &c. Illustrated. Second Edition. Vol. I.-Copper, Lead, Silver, Gold. Medium 8vo. 25s. net.

THE PREVENTION OF SENILITY AND A SANITARY OUTLOOK.

By Sir JAMES CRICHTON-BROWNE, M.D., LL.D., F.R.S. Crown 8vo. 2s. 6d. net.

SCIENTIFIC FACT AND METAPHYSICAL REALITY.

By ROBERT BRANDON ARNOLD. 8vo. IOS. net.

NATURE.-"A notable performance. In originality of conception, vigour and clearness of statement, width of outlook and fairness to all the aspects of experience, it would be with difficulty surpassed."

SEVENTH EDITION. REVISED AND ENLARGED.

The Elementary Part of

A TREATISE ON THE DYNAMICS OF A SYSTEM OF RIGID BODIES.

Being Part I. of a Treatise on the whole Subject.

By EDWARD JOHN ROUTH, Sc.D., LL.D., F.R.S., &c. With numerous Examples, Svn. 145.

NEW BOOK BY SIR OLIVER LODGE.

EASY MATHEMATICS: Chiefly Arithmetic.

Being a Collection of Hints to Teachers, Parents, self-taught Students, and Adults, and containing a
Summary or Indication of most things in Elementary Mathematics useful to be known.
By SIR OLIVER LODGE, F.R.S., D.Sc., Principal of the University of Birmingham. Crown Svo.

45. 6d.

[blocks in formation]

PHOENIX

ASSURANCE COMPANY, LIMITED.

FIRE OFFICE.

WATKINS & DONCASTER,

Naturalists and Manufacturers of

CABINETS AND APPARATUS

N. B.

FOR ENTOMOLOGY, BIRDS' EGGS AND SKINS, AND ALL
BRANCHES OF NATURAL HISTORY.

SPECIAL SHOW-ROOM FOR CABINETS.

For Excellence and Superiority of Cabinets and Apparatus, references 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.

Birds, Mammals, &c., Preserved and Mounted by First-class Workmen true to Nature. All Books and Publications on Natural History supplied. 36 STRAND, LONDON, W.C. (Five Doors from Charing Cross.)

☛ New Catalogue (102 pp.) just issued, post free.

Collections and Single Specimens of
British and Foreign

MINERALS, ROCKS, FOSSILS.

25 Specimens, 5/6; 50 do., 10/6; 100 do.. 21/-; 2co do, 42/-. 20 Coal Measure Rocks and Fossils, 12/6; do, larger, 15/-. In Polished Deal Boxes.

Inspection invited of a large stock of Minerals, Rocks, Fossils, ana Microscopic Objects. Specimens sent on approval.

Cabinets, Geologists' Hammers, Card Trays, Glass-Capped Boxes, Models of Crystals, and other Apparatus for Geologists, &c. NEW CATALOGUES POST FREE.

THOMAS D. RUSSELL, 78 Newgate St., London, E.C.

MICROSCOPICAL PETROGRAPHY.

Gentlemen interested in the above study are invited to send to JAMES R. GREGORY & CO.,

1 Kelso Place, Kensington Court, London, W., for a Prospectus of

19 LOMBARD ST., E.C., and 57 CHARING CROSS, S.W. THE TWENTIETH CENTURY ATLAS OF ESTABLISHED 1782.

Moderate Rates. Absolute Security.

Electric

[blocks in formation]

MICROSCOPICAL PETROGRAPHY,

now being issued in Twelve Monthly Parts, each Part containing Four Fine Half-Tone Plates, and also Four actual Rock Sections. ubscription in advance, either Monthly, 7/-; Quarterly, 21/-, or for the whole Series of 12 Monthly Parts & 48 Sections, £4 4s.

LIVING SPECIMENS FOR
THE MICROSCOPE.

Volvox, Spirogyra, Desmids, Diatoms, Amoeba, Arcella, Actinosphærium, Vorticella, Stentor, Hydra, Floscularia, Stephanoceros, Melicerta, and many other specimens of Pond Life. Price 15. per Tube, Post Free. Helix pomatia, Astacus, Amphioxus, Rana, Anodon, &c., for Dissection purposes. THOMAS BOLTON,

25 BALSALL HEATH ROAD, BIRMINGHAM 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, Alcyonium; Hormiphora (preserved); Leptoplana; Lineu, Amphiporus, Nereis, Aphrodite, Aren cola, Lanice, Terebella; Lepas, Balanus, Gammarus, Ligia Mysis, Nebalia, Carcinus; Patella, Buccinum, Eledone, Pectens Bugula, Crisia, Pedicellina, Holothuria, Asterias, Echinus, Ascidia, Salpa (preserved), Scyllium, Raia, &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

SUBSCRIPTIONS TO "NATURE."

£ s. d. To ALL PLACES ABROAD:

PHUSIS," LONDON.

CHARGES FOR ADVERTISEMENTS. £ s. d.

[merged small][merged small][ocr errors][merged small][merged small][merged small][merged small]

£ s. d.

£ s. d

"Three Lines in Column

2

[blocks in formation]
[merged small][ocr errors]

6 | Quarter Page, or Half O 9 a Column

1 15 0

[ocr errors][merged small][merged small][merged small][ocr errors][merged small][merged small]
[merged small][ocr errors][merged small][merged small][merged small]

The first line being in heavy type is charged for as Two Lines.

Cheques and Money Orders payable to MACMILLAN & CO., Limited.

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

GAIFFE-D'ARSONVAL MACHINE

Replaces Coils, Interrupters, and Wimshurst
Machines.

Producing, perfectly regulating, and exactly measuring

X-RAYS, HIGH-FREQUENCY CURRENTS, AND
STATIC EFFECTS.

Silent in Working, Simple in Manipulation. This apparatus has been already installed by many of the chief workers in Electro Therapest in France and England, and is giving the very best results (vide testimonials).

Replaces large Induction Coils in Laboratory and Research Work requiring High Electric Tensions or Electric Oscillations of great power and uniformity. Descriptive Pamphlet gratis on application from the Sole Agents for Great Brita and its Colonies

THE MEDICAL SUPPLY ASSOCIATION. 228 Gray's Inn Road, London, W.C., where the apparatus

CROSSLEY'S 'S GAS ENGINES

[graphic]
[graphic]

RECENTLY REMODELLED.

Represents K and L types, giving 3.5 H.P. and 5 H.P respectively.

Immediate Delivery

for Stock Sizes

of Engines.

CROSSLEY BROS., LTD.,

JUST

GREAT REDUCTION

IN

GAS CONSUMED. Up to the end of 1904, over 51,000 gas and oil engines had been delivered, representing about threequarters of a million actual horse-power.

OPENSHAW, MANCHESTER

PUBLISHED.

Price List of Electro-
Diagnostic Apparatus.

Watson's New Therapeutical and

WATSON & SONS

W. WATSON & SONS, 313

Established 1837.

The new edition is greatly enlarged, containing 108 pages fully describing and illustrating all standard and many new instruments at reduced prices, with notes to assist in the selection of apparatus.

CORRESPONDENCE INVITED.

Post free and gratis on application.

High Holborn, London, W.C.

Branches: 16 FORREST ROAD, EDINBURGH; 2 EASY ROW, BIRMINGHAM.

HAND

THE CORRESPONDENTS' CAMERA. OR TRIPOD.

Originally made for the use of Newspaper Men in South Africa, and since used all over the World.

THIS Camera has been designed for the use of correspondents, artists, and other travellers who, while requiring a Camera possessing the greatest stability, cannot spare the space for a regular field camera in addition to a hand camera. It is made of the best manogany, carefully finished and covered with hard morocco leather, or polished in natural colour or ebonised at the same price. It is admirably adapted for Telephoto work. Owing to the use of wood instead of metal, wherever possible, this camera is lighter than many of less substantial make. EACH SIZE PERMITS OF THE USE OF THE SINGLE COMPONENTS OF A STIGMATIC OR OTHER CONVERTIBLE LENS. PRICE, including 3 Double Slides, but j 4 by 31. 6 by 41. £5 15s. 6d. £7 15s. Od.

[graphic]

without Lens or Shutter.

5 by 4.
£6 10s. Od.

J. H. DALLMEYER, Ltd., 25 NEWMAN ST., OXFORD ST., LONDON, W.

MAKERS OF THE CELEBRATED DALLMEYER LENSES.

Printed by RICHARD CLAY AND SONS, LIMITED, at 7 & 8 Bread Street Hill, Queen Victoria Street, in the City of London, and published by MacuIF LAS AND CO., LIMITED, at St. Martin's Street, London, W.C., and THE MACMILLAN COMPANY, (6 Filth Avenue, New York.-IHURSDAY, October 26 1905

« PrejšnjaNaprej »