24 



NA TURE 



[November 6, 190: 



conclusion is drawn from this that where irrigation is possible 

 in the spring without too great an expense, the results will be 

 very advantageous to the farmer. — Some cases of integration of 

 the equation to the brachistochrome, by M. Haton de la 

 Goupilliere. — On cavitation in screw steamers, by M. J. A. 

 Bormand. The name cavitation is given to the phenomenon 

 met with when a screw is driven in water at speeds above a 

 certain limiting value. A cavity is formed in the water inside 

 which the screw revolves, and a further increase in the power 

 driving the screw then results in no increase in the velocity of 

 the boat. The alterations necessitated in the usual formulae for 

 screw propulsion by this phenomenon are discussed in detail. — 

 On the velocity of propagation of the X-rays, by M. T. 

 Blondlot. By means of the action of the X-rays upon the dis- 

 charge of a Hertzian exciter, it is shown that the duration of 

 these rays is less than 5 x 10 -1 " sec, and that the velocity of 

 the X-rays is of the same order as that of the Hertzian waves. 

 — Remarks by M. le General Bassot on the volume of the 

 Connaissance des Temps for 1905. — New observations on 

 the volcanic eruptions at Martinique, by M. A. Lacroix. 

 — Observations on the sun made at the Observatory 

 of Lyons with the Brunner equatorial during the second 

 quarter of 1902, by M. J. Guillaume. The results are 

 summarised in three tables giving the number of spofs, their 

 distribution in latitude and the distribution of the facuke in 

 latitude. — On the theory of algebraic functions, by M. Ludwig 

 Schlesinger. — On Bessel's equation with a second member, by 

 M. A. S. Chessin. — On an example of correlative transformation 

 in mechanics, by M Paul J. Suchar. — The precautions to be 

 laken in the employment of silk fibres as torsion wires, by 

 M. V. Cremieu. — Vision at a distance by electricity, by M. J. H. 

 Coblyn. — The variation of the magnetic resistance ot a bar 

 submitted to traction, by M. Fraichet. — The electromotive 

 force of a thermoelectric element, by M. Ponsot. — A method 

 for the volumetric estimation of tannin and the analysis of wood 

 and of tannin extracts, by M. Albert Thompson. The method 

 is based upon the determination of the amount of oxygen ab- 

 sorbed from an alkaline solution of hydrogen peroxide by the 

 tannin. — On a new base derived from galactose, by M. E. 

 lv iux. By the reduction of (he oxime obtained from galactose, a 

 new base named galactamine is obtained, the preparation and 

 chief properties of which are described. — On a new compound 

 of the hexamethylene-tetramine group, by M. Marcel Descude. 

 — On a solid acid from the oil of Eiaeocecca virnicia, by M. L. 

 Maquenne.— On musculamine, a base derived from muscles, 

 by MM. A. Etard and A. Vila. The base described is the first 

 example of a triamine base among biological products. — On the 

 origin of the natural coloration of silk in the Lepidoptera, by 

 MM. D. Levrat and A. Conte. These researches show the 

 possibility of passing a substance such as a colouring matter 

 through the digestive tube on to the silk, through the blood. 

 — On the new genus Gyrinocheilus of the family Cyprinidae, 

 by M. Leon Vaillant. — Contribution to the study of the Anopheles 

 ol the Isthmus of Suez, by M. Cambouliu. —The physical con- 

 ditions of tuberisation in plants, by M. Noel Bernard. — Ob- 

 servations on the germination of the spores of Sacckaromyces 

 Ludwigii, by M. A. Guillermond. — On the pollen of plants 

 belonging to the genus Asclepias, by M. Paul Dop. — New ex- 

 periments in maritime aeronautics, by M. H. Herve. 



DIARY OF SOCIETIES. 



THURSDAY, November 6. 



Linnean Society, at 8.— Notes on a Natural History Journey to Chile : 

 H. J. Elwes, F.R.S. 



Rontgen Society, at 8.30. — Address by the President, Mr. Herbert 

 Jackson. 



Chemical Society, at 8.— Di-Indigot'me : J. Moir — Note on the Localisa- 

 tion of Phosphates in the Su'-ar Cane : C. H. G. Sprankling. — The 

 Specific Heats of Gases : H. Crompton. — On the Non-existence of the 

 Gaseous Sulphide of Carbon described by Deninger: E. J. Russell and 

 N. Smith. — 1 he Action of Nitric Acid on Bromophenolic Compounds: 

 W. Robertson.— Hydroxyoxamides. Part II. : R. H. Pickard, C. Allen, 

 W. A. Bowdler and W. Carter. — 3 : 5-Dichlor-^-xylene and 3 : 5-Dichlor- 

 i)-phthalic Acid : A. W. Crossley and H. R. Le Sueur — Isometric 

 Anhydrous Sulphates of the Form M"S04,R' 2 S0 4 : F. R. Mallet.— 

 The Catalytic Racemisation of Amygdaline : J. W. Walker. — The 

 Combination of Carbon Monoxide with Chlorine under the Influence of 

 Light : G. Dyson and A. Harden— The Constituents of Commercial 

 Chrysarobin : H. A. D. Jowett and C. E. Potter. 



SATURDAY, November S. 

 E-;sex Field Club (Essex Museum of Natural History, Stratford), at 

 6.30 p.m. — Results of the Fungus Foray on October 17 and 18 : Dr. 



NO. 1723, VOL. 67] 



M. C. Cooke.— Report of Delegate at British Association Meeting, 

 Belfast : \V. Whitaker, F.R.S.— Lecture, " Insect Life" : F. Enock. 



TUESDAY, November ii. 



Institution of Civil Engineers, at 8. — Electric Tramways : C. 

 Hopkinson, B. Hopkinson and E. Talbot. 



Anthropological Institute, at 8.15.— On the Classification and Arrange- 

 ment of the Exhibits of an Anthropological Museum : W. H. Holmes. — 

 On the Initiation Ceremonies of the Natives of the Papuan Gulf: Rev. 

 J. H. Holmes. 



Royal Geographical Society, at 8.30.— World-shaking Earthquakes: 

 Prof. J. Milne, F.R.S. 



THURSDAY, November 13. 



Mathematical Society, at 5.30. — Address on the Infinite and the 

 Infinitesimal in Mathematical Analysis : Dr. E. W. Hobson.— Ueber den 

 Satz der Gleichheit der Basiswinkel im gleichschenkligen Dreieck : Dr. 

 D. Hilbert.— The Summation of a Certain Series : Prof. A. C. Dixon.— 

 Expansion by Means of Lame's Functions : Prof. A. C. Dixon.— Sets of 

 Intervals: W. H. Young.— Note on Unclosed Sets of Points defined as 

 the Limits of aSequence of Closed Sets of Points : W. H. Young.— Wave 

 Propagation in Two Dimensions : Prof. H. Lamb.— The Continuation of 

 Certain Fundamental Powers Series : Prof. M. J. M. Hill.— A Geodesic 

 on a Spheroid and an Associated Ellipse : L. Crawford. 



Institution of Electrical Engineers, at 8. 



FRIDAY, November 14. 

 Royal Astronomical Society, at 5. 



CONTENTS. page 



Linear Differential Equations. By G. B. M I 



Scientific Psychology. By W. McD 2 



The Modern Dynamo. By M. S 4 



Our Book Shell 



" Thirteenth Annual Report of the Local Government 



Board, 1900-1."— Prof. R. T. Hewlett 5 



Robinson: "The Flora of the East Riding of York- 

 shire " S 



Campbell : " A Revolution in the Science of Cosmo- 

 logy " .-,••• 6 



'" The Reliquary and Illustrated Archieologist " ... 6 



Stickney : " Earth and Sky " 6 



Letters to the Editor : — 



The Waste of Energy from a Moving Electron. — 



Oliver Heaviside, F.R.S 6 



Leonid Meteors, 1902. A Forecast. — John R. 



Henry . 8 



Curvature of Wheel Spokes in Photographs. {Illus- 

 trated.)— R. M. Milne 8 



The Turkestan Earthquake of August 22. — R. D. 



Oldham 8 



Leciures on Anthropology and Ethnology. — Dr. 



H. W. Marett Tims 9 



The Royal Society's Catalogue of Scientific Papers 9 

 The Berlin Tuberculosis Congress. By F. W. T. . 10 

 Anthropology and Government in the Uganda Pro- 

 tectorate. {Illustrated.) By E. Sidney Hartland . 10 



Notes 11 



Our Astronomical Column : — 



Variation in Magnitude of a Orionis 16 



The Nebula around Nova Persei 16 



Coronal Disturbance and Sun-Spots . 16 



The Variable Star 13, 1902, Lyra: 16 



New Variable Star, 15, 1902, Delphini 16 



Education at the British Association. By R. A. G. 17 



Botany at the British Association. By H. W. ... 19 

 Carlsbad Meeting of the German Association of 

 Naturalists and Physicians. By Dr. F. Schuman- 



Leclercq 20 



University and Educational Intelligence 22 



Societies and Academies 23 



Diary of Societies 24 



Supplement. 



The History of Egypt iii 



Mohr on the Dynamical Theory of Heat and the 

 Conservation of Energy. By Prof. R. Meldola, 



F.K.S v 



Soil Surveys. By A. D. H vi 



An Advanced Text-book of Botany vii 



Embryology of the Lower Vertebrates. By J. A. T. viii 



Two Books on American Sport. By R. L ix 



Gas Analysis. By G. N. H x 



