270 



NATURE 



[April 28, 19 10 



FORTHCOMING CONGRESSES. 



May 14-22.— International Botanical Congress. Brussels. General 

 Secretary : Dr. E. de Wildeman, Jardin botanique, Bruxelles. 



May 16-21. — International Congress of Americanists. Buenos Ayres. 

 General Secretary: Dr. Lehmann-Nitsche, Calle Viamonte 430, Buenos 

 Ayres, Argentine Republic. 



May 20-23.— International Congress of Tropical Agriculture. Brussels. 

 Secretary of British Committee : Dr. T. A. Henry, Scientific and Technical 

 Department, Imperial Institute, S.W. 



May 30 TO June 4. — International Ornithological Cotigress. Berlin. 

 President : Prof. A. Reichenow. Address for inquiries : Berlin N 4, Invalid- 

 enstr. 43. 



June.— International Congress of Mining, Metallurgy, Applied Mechanics 

 and Practical Geology. Diisseldorf. General Secretaries : Dr. SchrSdter 

 and Mr. Lowenstein, Jacobi-strasse 3/5, Dusseldorf, Germany. 



July 10-25. — International American Scientific Congress. Buenos Aires. 

 Address for inquiries : President of the Executive Committee, c/o Argentine 

 Scientific Society, 269 Calle Cevallos, Buenos Aires. 



July 27-31. — International Congress on the Administrative Sciences. 

 Brussels. Secretary of British Committee : Mr. G. Montague Harris, 

 Caxton House, Westminster. 



August 1-6. — International Congress of Entomology. Brussels. Chair- 

 man of Local Committee for Great Britain : Dr. G. B. Longstaff, Highlands, 

 Putney Heath, S.W. 



August 1-7. — French Association for the Advancement of Science. 

 Toulouse. President : Prof. Gariel. Address of Secretary : 28 rue 

 Serpente, Paris. 



August. — International Congress of Photography. Brussels. Corre- 

 spondent for United Kingdom: Mr. Chapman Jones, n Eaton Rise, 

 Ealing, W. 



August 2-7. — International Congress on School Hygiene. Paris. General 

 Secretary : Dr. Dufestel, 10 Boulevard Magenta, Paris. 



August 15-20. — International Zoological Congress. _ Graz (Austria). 

 President : Prof. Ludwig von Graff. Address for inquiries : Presidium 

 desVIII. Internationalen Zoologen-Kongresses, Universitatsplatz 2, Graz 

 (Osterreich). 



August 18-26. — International Geological Congress. Stockholm. General 

 Secretary : Prof. J. G. Andersson, Stockholm 3. 



August 29 to September 6.^International Union for Cooperation in 

 Solar Research. Mount Wilson Solar Observatory. British Member of 

 Executive Committee to whom inquiries should be addressed: Prof. A. 

 Schuster, F.R.S., Victoria Park, Manchester. _ 



August 31 TO September 7.— British Association. Sheffield. President: 

 Prof. T. G. Bonney. F. R.S. Address for inquiries: General Secretaries, 

 Burlington House, W. 



September 6-8. — International Congress of Radiology and Electricity. 

 Brussels. General Secretary : Dr. J. Daniel, i rue de la Pr6vote, Brussels. 

 Correspondents for United Kingdom : Prof. Rutherford and Dr. W. 

 Makower, University of Manchester, and Dr. W. Deane Butcher, Holyrood, 

 Ealing, W. 



September 18-24. — German Association of Naturalists and Physicians. 

 Konigsberg. Secretaries : Prof. Lichtheim and Prof. F. Meyer, Drumm- 

 str. 25-29, Konigsberg. 



September 27-30. — International Physiological Congress. Vienna. 

 President : Prof. S. Exner. General Secretary for United Kingdom : 

 Prof. E. B. Starling, University College, London, W.C. _ 



October 6-12. — Congres International du Froid. Vienna. Correspon- 

 dent for United Kingdom : Mr. R. M. Leonard, 3 Oxford Court, Cannon 

 Street, E.G. 



DIARY OF SOCIETIES. 



THURSDAY, April 28. 

 Royal Society, at 4.30. — On the Rotatory Character of some Terrestrial 

 Magnetic Disturbances at Greenwich, and on their Diurnal Distribution : 

 R. B. Sangster. — The Liberation of Helium from Minerals by the Action 

 of Heat : D. O. Wood.— The Chromophil Tissues and the Adrenal 

 Medulla : Prof. Swale Vincent. 

 Royal Institution, at 3. — Blackfeet Indians in North America : Walter 



McClintock. 

 Institution of Electrical Engineers, at 8. — Earthed versus Insulated 



Neutrals in Colliery Installations : W. W. Wood. 

 Mathematical Society, at 5.30. — The Accuracy of Interpolation by 

 Finite Differences : Dr. W. F. Sheppard. — Not^e on Maclaurin's Test for 

 the Convergence of Series : G. H. Hardy. 



FRIDAY, April 29. 

 Royal Institution, at 9. — Matavanu : a New Volcano in Savaii (German 

 Samoa) : Dr. Tempest Anderson. 



SA TURD A Y, April 30. 

 Royal Institution, at 3.— The World of Plants before the Appearance 

 of Flowers : Dr. D. H. Scott, F.R.S. 



MONDA Y, May 2. 

 Royal Institution, at 5. — Annual Meeting. 

 Victoria Institute, at 4.30. — Annual General Meeting. 

 Aristotelian Society, at 8. — The Emotional Experiences of some Higher 



Mystics : Rev. A. Caldecott. 

 Royal Society of Arts, at 8.— Modern Methods of Brick-making: 



Dr. A. B. Searle. 

 Society of Engineers, at 7.30. — Up-to-date Roads : R. O. Wynne- 

 Roberts. 

 Society OF Chemical Industry, at 8.— The Principles of Tanning : Dr. J. 

 Gordon Parker.— The Crystalline Products of the Hydration of Portland 

 Cement : E. F. Re.-id. 



TUESDAY, May 3. 

 Royal Institution, at 3. — The Mechanism of the Human Voice : Prof. 



F. W. Mott, F.R.S. 

 Royal Society of Arts, at 4.30. — Commercial Expansion within the 



En:?:' .?. J. Hannen. 

 Zoological Society, at 8.30. — (i) The Morphology and Life-history of 

 Eimeria (Coccidiuiii) avhtin : a Sporozoon causing a Fatal Disease 

 among Young Grouse ; (2) Observations on the Parasitic Protozoa of the 

 Red Grouse (Lagofius scoticns) ; (3) Experimental Studies on Avian 

 Coccidiosis, especially in Relation to Young Grouse, Fowls, and Pigeons; 

 (4) Observations on the Blood of Grouse : Dr. H. B. Fantham.— Zoo- 



logical Results of the Third Tanganyika Expedition, conducted by 



Dr. W. A. Cunnington, 1904-1905. Report on the Ostracoda :_ Prof 



G. O. Sars. — On Tritylodon, and on the Relationships of the Multituber- 



culata : Dr. R. Broom. 



IVEDNESDA Y, May 4. . . 

 Society of Public Analysts, at 8. — The Composition of Milk ; Note 



on Commercial Detergents : H. Droop Richmond. — Uses of Tri- 



chlorethylene in Chemical Analysis : L. Gowing Scopes. — X Convenient 



Fat Extraction Apparatus : W. Clacher.— An Extraction Apparatus : 



G. S. Walpole. 

 Royal Society of Arts, at 8.— Halley and his Comet : Prof. H. H. 



Turner, F.R.S. 

 Entomological Society, at 8. — Descriptions of Micro-Lepidoptera from 



Mauritius: E. Meyrick, F.R.S. 

 Royal Geographical Society, at 8.45. — My Expedition to the North 



Pole : Commander R. G. Peary. 



THURSDAY, May 5- 

 Royal Society, at ^.■^.— Probable Papers : The Development of Try- 



panosomes in Tsetse Flies: Col. Sir D. Bruce, C.B., F.R.S., Captains 



A. E. Hamerton and H. R. Bateman, R.A.M.C, and Captain F. P. 



Mackie, I. M.S. —On the Weight of Precipitate obtainable in Precipitin 



Interactions : Dr. H. G. Chapman. — The Absorption of Gases by 



Charcoal : Miss Homfray. 

 Royal Institution, at 3. — Blackfeet Indians in North America : Walter 



McClintock. 

 R5NTGEN Society, at 8.15. — Quantitative Measurements of the Conversion 



of Kathode Rays into Rontgen Rays by Antikathodes of Different 



Metals : J. H. Gardiner. 

 Institution of Electrical Engineers, at 8. — A Telephone Relay : 



S. G. Brown. 

 Linnean Society, at 8. — Eight Months' Entomological Collecting in the 



Seychelles Islands : Hugh Scott.— The Anatomy of Tipula maxima ; 



J. M. Brown. 



FRIDAY, May 6. 

 Royal Institution, at 9. — Auto-inoculation : Sir Almroth E. Wright, 



F.R.S. 

 Geologists' Association, at 8.— The History of the Study of Fossils : 



Dr. A. Smith Woodward, F.R.S. 



SA TURD A Y, May 7. 

 Royal Institution, at 3. — The World of Plants before the Appearance 



of Flowers: Dr. D. H. Scott, F.R.S. 



CONTENTS. PAGE 



Dynamics in England, France, and Germany. By 



Prof, G. H. Bryan, F.R.S 241 



Hardy Trees and Shrubs 243 



Antediluvian Chronology 244 



Field Ornithology. By O. V. A 245 



Exoteric Philosophy 246 



Our Book Shelf:— 



Hole: "A Manual of Botany for Indian Forest 



Students" 247 



de Rustafjaell: "The Light of Egypt, from recently 



discovered Predy nastic and Early (Ilhristian Records " 247 

 Letters to the Editor : — 



Precursors of Magnetic Storms.— Rev. J. de Moidrey 248 

 Centre of Gravity of Annual Rainfall.— J. Cook ; 



Andrews Watt 248 



The Fertilising Influence of Sunlight. — Dr. E. J. 



Russell 249 



Pneumatolysis.— Arthur R. Hunt 249 



Anomalous Reading of Hygrometer. — Hugh 



Richardson • 249 



American Desert Vegetation. {Illustrated.) By Prof. 



Percy Groom 250 



Nubian Archaeology. {Illustrated.) By H. R. Hall . 251 

 From the Cape to Cairo with a Magnetometer. 



By Prof J. C. Beattie 253 



Sir Robert Giffen, K.C.B., F.R.S 254 



Notes 255 



Our Astronomical Column : — 



Astronomical Occurrences in May 259 



The Total Solar Eclipse of May 8, 1910 259 



Halley's Comet 259 



Comet 1910a 260 



Opening of the New School of Agriculture, Cam- 

 bridge 260 



International Congresses on Ornithology and 



Tropical Agriculture 260 



Economic Geology in Canada. By Prof. Henry 



Louis 261 



Recent Papers on Birds 262 



Langley's Contributions to Aeronautics. By Dr. 



Alexander Graham Bell 263 



Industrial England in the Middle of the Eight- 

 eenth Century 264 



University and Educational Intelligence 268 



Societies and Academies 269 



Forthcoming Congresses 270 



Diary of Societies 270 



VO. 2 113, VOL. 83] 



