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Paris.

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.

CONTENTS.

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
Rayleigh, O.M., F.R.S. .

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:-
The aldehyde in aqueous solution is mixed directly with Radial Motion in Sun-spot Vapours

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

Bird Notes

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

89

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HILCER WAVE-LENCTH

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