« PreviousContinue »
extracted from asparagus : Georges Tanret. These have Academy of Sciences, July 5.-M. Émile Picard in the composition (C,H, 0s)., where n is about 15. Details the chair.-Some new trialkylacetophenones and the tri- of the method of isolation and properties of these carbo alkylacetic acids derived from them : A. Haller and Edouard hydrates are given.-The role of the fluorescent bacilli o Bauer. It has been shown in a preceding communication Flügge in plant pathology: Ed. Gritton.—The biometricai that dialkylacetophenones can be converted into trialkyl- study of the seeds of Vitis vinifera : P. Seyot.-The supacetophenones by treatment with an alkyl iodide in benzene i posed utilisation of atmospheric nitrogen by certain special solution in presence of sodium amide. These trisubstituted hairs of plants: François Kövessi. The development of ketones, when further heated with sodium amide in toluene plant hairs is independent of the presence of atmospheric give a nearly quantitative yield of the amide of the trialkyl- nitrogen, and there is no evidence that these organs have acetic acid, together with benzene. In the present paper specialised absorptive powers for nitrogen.--Seeds killed by alkyl groups of high molecular weight are introduced. " It anæsthetics retain their diastatic properties : Jean Apsit has been found that on treatment with sodium amide these and Edmond Gain. Grains of wheat, the germinatirg trialkyl ketones always give the fatty amide, the expected power of which had been destroyed by treatment with change into benzamide and the trialkylmethane not being ether, retained both their diastatic and peroxydiastatic proeffected. The preparation and properties of several new perties.-The sensation of relief : A. Quidor.—The preketones are described.—The tectonic relations of the island sence of attractive spheres and of centrosomes in the cells of Elba with Corsica, and the situation of the latter in the resulting from the parthenogenetic segmentation of the Alpine chain : Pierre Termier.-The new Recueil of level- fowl's egg, and on the characters of these formations : A lings of Russian railways as a basis for the hypsometry of Lécaillon.—The caves of Lacave (Lot): Armand Viréthe country: J. de Schokalsky.–Central Asiatic Russia The morphological zones of western Switzerland : E and the level of the lake basins : J. de Schokalsky. There Romer.—The earthquakes of June 11 and 23: Alfred is evidence that the levels of the Siberian lakes are slowly Angot.--An attempt to guard against hail : M. de Beaurising. This is connected with the fact that the annual champ.-New observations on earth currents between rainfall for the last twenty years has been slowly increas- stations differing greatly in height: B. Brunhes and P. ing: It is possible that there are alternate dry and wet periods in Siberia, and that at the present time the wet period has passed its maximum.-M. J. C. Kapteyn was elected a correspondant in the section of astronomy.
PAGE Occultations of stars observed at the Observatory of Lyons
61 with the Brunner 16-cm. equatorial during the eclipse of Regeneration. By Dr. Francis H. A. Marshall the moon of June 3: J. Guillaume.—The summation of
A Naturalist in Tasmania
61 Dirichlet's series : Marcel Riesz.-The singular integrals | Properties of Building Materials. By H. B.
62 of certain algebraical differential equations : B. Gambier.- Economic Bacteriology. By Prof. R. T. Hewlett
63 Linear differential equations and uniform transcendentals of Forestry.
63 the second order : René Garnier.—Some inequalities having a bearing on the theory of elastic vibrations and electrical
New Books on Organic Chemistry. By J. B. C.
64 vibrations : A. Korn.—The conductivity of a gas at atmo
Physics for the Lecture Room and Laboratory
66 spheric pressure under the influence of a high alternating Our Book Shelf :voltage : A. Chassy. The conductivity of a gas increases Cosserat : “Théorie des Corps déformables”. continuously with the voltage, and it is only for the highest Hawk : “ Practical Physiological Chemistry." voltages well above the critical voltage that the capacity
W. D. H. of the gas condenser is the same as that which would be Pike: “Behind the Veil in Bird-land.”_W. P. P.
67 obtained if the gas were replaced by a liquid conductor. Koehler : “An Account of the Deep-sea Asteroidea It is possible that under these conditions the gas is a true collected by the R.I.M.S.S. Investigator”.
67 conductor and follows Ohm's law.–The radio-activity of Wang : “ Antimony
68 potassium salts : Emile Henriot and G. Vavon. The Soliman : “ Étirage, Tréfilage, Dressage des Produits minute radio-activity shown by potassium salts would metallurgiques.”—A. McW..
68 appear to be a property of the potassium atom, since all Reinheimer : "Nutrition and Evolution"
68 attempts to concentrate the radio-activity by a series of Lotters to tbe Editor :fractionations failed. This confirms the results of Campbell Bessel's Functions.-A. B. Basset, F.R.S. .
68 and MacLellan. The rays have been identified with the Musical Sands.-Cecil Carus. Wilson
69 B rays.--Tautomeric changes elucidated by means of the The Commutative Law of Addition, and Infinity. magnetic rotatory power : P. Th. Muller and M.
Philip E. B. Jourdain ; G. B. M.
69 Thouvenot. A differential method was employed to increase the sensitiveness of the measurements. Experiments
The Theory of Crookes's Radiometer. By Lord
69 were made with methyl cyanacetate and its sodium salt and with acetoacetic ester and its sodium derivative. The
Life in an Oasis. (Illustrated.) By Prof. John W. results indicate a change in the internal structure when
Judd, C.B., F.R.S.
70 the molecule passes into the sodium derivative.-The
The Isle of Wight. (Illustrated.) By F. C. chlorides of silicon : A. Besson and L. Fournier. The Sleeping Sickness. By J. W. W. S.
73 evolution of hydrogen from silicochloroform under the action
The Contamination of Milk .
74 of the silent discharge has been confirmed by working in a The Winnipeg Meeting of the British Association, current of hydrogen chloride gas.-A new method for the (Illustrated.)
75 isolation of terbine : G. Urbain.-The oxidation of alde- Notes
78 hvdes by silver oxide : Marcel Delépine and Pierre Bonnet.
Our Astronomical Column:-
82 silver nitrate, and baryta solution added in a proportion sufficient to set free the silver oxide and neutralise the
Binary Star Orbits
Micrometric Measures of Double Stars organic acid formed. Various applications of the method are given, the yields being very high, usually more than 90 per
The Identity of Comets 1908a and 19086 (Encke) cent. of the theoretical.—The hydrolysis of proteid materials
Comet 1909a . by means of hydrofluoric acid; some new results : L.
The King on Increased Provision for Advanced Hugounenq and A. Morel. Bv varving the strength of
Scientific Instruction and Research the hydrofluoric acid used for the hydrolysis the reaction
The Science Collections at South Kensington
84 can be stopped at definite stages. The process is especially Eskdalemuir Observatory
86 advantageous for the isolation of the simple peptides. - The Imperial Cancer Research Fund Study of the principal layers of the alkaline rocks of the Scottish Expedition to Spitsbergen
87 French Soudan : G. Garde.-The elaboration of the mate
87 rials containing phosphorus and saline substances in the
University and Educational Intelligence
88 leaves of living plants: G. André.—Two new carbohydrates Societies and Academies
83 83 S3 83
WAVE-LENGTH DRUM (Full Size).
Complete Description Post Free
·ADAM HILGER, Ltd., 75a Camden Road, London, N.W.
Awarded TWO GRAND PRIZES at the Franco-British Exhibition.
Telegraphic Address :-“ Sphericity, London." Telephone : No. 1687 North.
STANDARD BOOKS INORGANIC CHEMISTRY. A Treatise on Chemistry. B SIR IECHROSCOE MER.S., and
the late C. , Completely revised by Sir H. E. ROSCOE, assisted by Drs. H. G. COLMAN and A. HARDEN. 8vo. Vol. I. The Non-Metallic Elements. New and Revised Edition. 21S. det. Vol. II. The Metals. New and Revised Edition. 30s. net. This, and the preceding volume on the Non-Metallic Elements, constitute the most complete and up-to-date Treatise on Inorganic Chemistry now available in the English Language. Vol. III. The Chemistry of the Hydrocarbons and their Deriva. tives, or Organic Chemistry. Parts II., IV., and VI., 21s. each. Part III., 18s.
By Prof. IRA REMSEN, 8vo. 165.
Extra Crown 8vo
8s. 6d. net.
By Prof. I. REMSEN, Fcap. 8vo. 25. 6d.
Third Edition. Extra Crown 8vo. 6s. net.
Crown 8vo. 6s. 6d.
F.R.S. Assisted by JOSEPH LUNT, B.Sc. Globe 8vo.
A Text-Book of Inorganic Chemistry. College Text-Book of Chemistry. By Prof.LREMSEN. Inorganic Chemistry. By Prof. I. Remsen. Crown 8vo. 65. 6d.
REMSEN. The Elements of Chemistry. The Gases of the Atmosphere. Ba, SERRA Elements of Inorganic Chemistry. By PrOSONARRY Inorganic Chemistry for Beginners. BESTROSENE,
É Inorganic Chemistry for Advanced Stu
dents. By SIR H. E. ROSCOE, F.R.S., and Dr. A. HARDEN. Globe 8vo. 45. 6d. Lessons in Elementary Chemistry, Inor
ganic and Organic. By SIR H. E. ROSCOE, F.R.S. Chemistry for Organized Schools of Science.
By S. PARRISH, B.Sc. With Introduction by D. FORSYTH, D.Sc. Globe 8vo. A Primer of Chemistry. Hilustrated. With Questions. Polt 8vo. 15
By SIR E. , An Introduction to the Study of Chemistry.
By Prof. W. H. PERKIN, JR., Ph.D., F.R.S., and BEVAN LEAN, D.Sc., B.A. (Lond. ).
25. 6d. Introductory Chemistry for Intermediate
Schools. By L. M. JONES, B.Sc. Globe 8vo. The Arithmetic of Chemistry, being a
Simple Treatment of the Subject of Chemical Calculations.
By JOHN WADDELL, B.Sc. (Lond.), Ph.D., D.Sc. Globe 8vo. 4s. net. A School Chemistry. For High Schools and Ele
mentary Classes in Colleges. By JOHN WADDELL, B.Sc., Ph.D. Crown 8vo. 45. net. Outlines of Industrial Chemistry. A TextBook for Students. By FRANK HALL THORP, Ph.D. 8vo. 155. net.
Seventh Edition, thoroughly
revised. Fcap. 8vo. 45. 6d.
WATKINS & DONCASTER,
Naturalists and Manufacturers of
BRANCHES OF NATURAL HISTORY.
Drawing Classes, &c.
Workmen true to Nature.
(Five Doors from Charing Cross.) I CATALOGUE (102 pp.) POST FREE.
Sales by Auction.
SALES OF MISCELLANEOUS PROPERTY.
that SALES are held EVERY FRIDAY, at his Rooms, 38 King
On view Thursday 1.30 to 5:30 and morning of Sale.
MINERALOGY, GEOLOGY & PETROLOGY.
Single Specimens and Collections
for Prospectors, Teachers and Students. Rock Sections, Well-eut. Fossils from all Formations. Metallie Ores from all Parts. Minerals for Chemical Purposes.
LISTS FREE from-
Telephone No. 2841 Western. Tel. Add., "Meteorites," London.
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, Alcy.
For prices and more detailed lists apply to
Minerals, Rocks, Fossils, Metallic
all prices. Inspection invited.
Single Crystals and Teaching Specimens in Great Variety.
RICHARDS' SHOW ROOMS, 8 Beauchamp Place, Brompton Road, South Kensington,
The following choice Norwegian MINERALS Crystal of Native Silver, £6; Molybdenite, £4; Ilmenite, £4; Aeschynite, 27/6; Malacone, 16/6; Broggerite, 27/6; Xenotime, 14/-; Rutile, 27/6; Apatite, 12/6; Aegirine, 7/-; Columbite, 8/6;
Monazite, 8/6; and Beryl, 5/-;
now on view and sale at THOMAS D. RUSSELL'S
Ground-Floor Show Rooms,
John Street (Theobald's Road) is reached from
NOTICE.- Advertisements and business letters for "Nature" should be addressed to the Publishers; Editorial Com. munications to the Editor. The telegraphic address of “ Nature” is “Phusis," London. Telephone-Gerrard, 8830.
SUBSCRIPTIONS TO “NATURE."
1 10 6
0 15 6
0 8 0
NET CHARGES FOR ADVERTISEMENTS.
0 2 6 One Sixth Page, or One Third Col. i 7 0 Per Line after ...
09 Quarter Page, or Half a Column 1 15 0 One Sixteenth Page, or Eighth Col. 7 10 0 Half a Page, or a Column
* Lines in heavy type are charged for as Two Lines.
OFFICE: ST. MARTIN'S STREET, LONDON, W.C.
W. Watson & Sons' Microscopes.
Oak Case, extra
78. 60. WATSON'S UNRIVALLED MICRO-OBJECTIVES For the work of the Laboratory, the 1/6 in. (4 mm.) and 1.12 in. (2 mm.) Oil Immersion are unexcelled.
The 1, 6 in. has the ENORMOUS WORKING DISTANCE of one millimetre ; specimens with thick covers can be freely examined. The 1/12 in. is the newly computed Objective that Dr. Spitta, in "Microscopy," refers to as rivalling, in fact, the performance of several apochromats." Where once these Objectives have been used they have been adopted entirely. And them to your equipment ! Prices-1/12 in. Oil Imm., 1'30 N.A., £5; 1/12 do., 1'20-1'25 N.A., £4. These are of identical
construction. 1/6 in., 74 N.A., £1 108. Full particulars of all the alore are contained in 11 atson's Catalogue No. 2, post free on request.
W. WATSON & SONS, Ltd.,
Depots : 2 EASY Row, BIRMINGHAM -78 SWANSTON STREET, MELBOURNE, AUSTRALIA.
SERIES II. F/6.
Is the best All-round Lens for either Professional or Amateur use.
it is sold to cover ; with smaller stops it will cover at least two sizes larger, giving perfect sharp DALLMEYER'S
ness all over the plate, and thus becoming a wide-angle lens of the highest excellence. Either PATENT
combination may be used separately, giving foci of about it and 2 times the length of that d
Eleven Sizes are now ready, from 31 to 18 inches eq. focus.
J. H. DALLMEYER, Ltd., DENZIL ROAD, NEASDEN, LONDON, N.Y.
Show Rooms :-25 NEWMAN STREET, W.
MAKERS OF THE CELEBRATED DALLMEYER PORTRAIT LENSES. runteu by NICHARD ULAY & SUAS LIMITED, at 7 a 8 Bread Street Hill, Queen Victoria Street, in the City of London, and published by MACMILLA AND CO, LIMITED, at St. Martin's Street, London, W.C., and THE MACMILLAN COMPANY. 56 Fifth Avenue, New York -THURSDAY, July 1s, 1905