4 8 



NA TURE 



[November 9, 1905 



in india-rubber is an individual peculiarity. The yield 

 may be ver} different in two individuals of the same age 

 and of the same size, living side b) side, and having the 

 latex extracted at the same time. — The influence oi 

 different kinds of light radiations on the migration of the 

 albumenoids in the wheat grain : J. Dumont. It was 

 found that the radiations which have the greatest effect 

 on the migration of the albumenoids in the wheat grain 

 are precisely those which act the least on the chlorophyll 

 Ion. inni. — On the mechanical work furnished by wind- 

 mills: M. Ringelmann. The windmill studied was of the 

 type used in agriculture for raising water. Automatic 

 records were made of the velocity of the wind, the number 

 of turns of the vane, and of the water lifted. A table of 

 results for different velocities of the wind is given, and 

 From litis the work obtainable from a windmill can be 

 calculated. — The accessory glands to the silk-producing 

 apparatus of the larva? of Io Irene : L. Bordas. The 

 liquid or slightly viscous substance secreted by the 

 accessory glands serves to agglutinate or unite the two 

 silk threads. It is possible, also, that it exerts a chemical 

 action on the threads, causing them to harden rapidly. — 

 On the existence of strata containing Clymenia in the 

 central plateau, Morvan : Albert Michel-Levy. — On the 

 dissymmetry of the loss of electricity in mountainous 

 countries: the comparative rSles of height and relief: 

 MM. Bernard Brunhes and Albert Baldit. At the summit 

 of a mountain the rate of loss of volts is greater for 

 negative than for positive electricity, These results serve 

 to show why several authors have been led to think that 

 passing from the plain to a mountain leads to a great 

 exaggeration of the loss of negative electricity. 



DIARY OF SOCIETIES. 



THURSDAY, November q. 

 Mathematical Society, at 5.30. — Annual General Meeting. — The 

 Continuum and the Second Number-class: G. H. Hardy.— On the 

 Arithmetical Nature of the Coefficients in a Group of Linear Substitu- 

 tl.ns of Finite Order (second paper): Prof. W. Burnside.— On the 

 Asymptotic Value of a Type of Finite Series : I. W Nicholson.— On an 

 Extension of Dirichlet's Integral: Prof. T. J.' FA. Bromwich.— fi) On 

 Improper Multiple Integrals; (2) On the Arithmetic Continuum: Dr. 

 E. W. Hobson. 

 Institution of Electrical Engineers, at 8. — Inaugural Address; 

 John Gavey, C.B. 



FRIDAY, November 10. 

 Roval AstronomicalSocietv. at 5.— (1) Observations of the Satellite of 

 Neptune from Photographs taken between Nov it, 1904, and April is, 

 1005 ; (z) Micrometric Measures of Double Stars made with the 28-inch 

 Refractor in the Year 1904: Royal Observatory, Greenwich: Communi- 

 cated by the Astronomer-Royal. — (1) On the Secular Acceleration of the 

 Earth's Orbital Motion : (-2) On the Ptolemaic Eclipses of the Moon re- 

 corded in the Almagest: P. H. Cowell.— Observations of Phenomena of 

 Jupiter's Satellites made at Windsor, New South Wales, in the Years 

 1900 and 1902: John Tebbutt.— On the Corrections to Hansen's "Tables 

 de la Lune," as deduced by Mr. Cowell : E. Nevill. 

 Physical Society, at 8 —The Question of 'temperature and Efficiencv of 

 Thermal Radiation : J. Swinburne.— Note on Constant-Deviation 

 Prisms : T. H. Blakeiley. 

 Malacological Society, at 8.— (1) Descriptions of New Species of 

 Drymaeus Amphicyclotus, and Neocyclotus from Central and South 

 America ; (2) Description of a New Species of Achatina from Mashona- 

 land: S. I. Da Costa.— On a Collection of Land and Freshwater Shells 

 from Sumatra with Descriptions of New Species, pprt i.: Rev. R. Ash- 

 ington Bullen. On a New Species of Oliva : F. G. Bridgman.— On the 

 Anatomy of Ensis niacha and Solen fonesii and c7. viridia : H. H. 

 Bloomer. 



TUESDA I', November 14. 

 Institution of Civil Engineers, at 8. — On Waterways in Great 



Britain : f A. Saner. 

 Zoological Society, 3t 8.30.— On the Papillary Ridges in Mammals, 

 chiefly Primates: Dr. Walter Kidd.— On a Collection of Mammals 

 brought home by the Tibet Frontier Commission : J. Lewis Bonhote.— 

 Note on the Geographical Distribution of the Okapi : Dr. Einar Limn- 

 berg. — Note-, on Goral found in Burma : Major George H. Evans.— The 

 Mammals of Crete : Dorothea M. A. Bate. 

 Miner \L0GICAL Society, at 8. — The Deiermination of the Angle between 

 the Opiic Axes of a Crystal in Parallel Polarised Light: Dr. J. W. 

 Evans.-(i)On a Tabular Crystal of White Diopside ; (2) On a Carlsbad- 

 twin of Albite : Prof. W. J. Lewis.— Note on the Crystallisation of 

 Drops, especially of Pota-h-Alum: J. Chevalier.— Note on the Forma- 

 tion of Gypsum Crystals in a Disused Well at Chemical Works: C. J. 

 Woodward.— (i)llntenite from the Kollergraben, Binnenthal ; (2) On a 

 New Red Cubic Mineral; (3) On Seligmannite, Marrite, and Lenjren- 

 bachite from the Lentienbacn Quarry ; (4) On Anhydrite and other 

 Minerals found in the White Dolomice of the Simplon 'I unnel : R. H. 

 Solly. 



WEDNESDAY, November 15. 

 Society of Arts, at 8.— Opeiing Address of the Chairman of the 



Council, Sir Owen Roberts. 

 K.^tomoloc.ic vl Society, at 8. 

 koyal Meteorological Society, at 7.30.— 'I he Rainstorm of August 



24-26, 1905, in Co. Dublin and Co. Wicklow : Sir J. W. Moore.— The 

 Aquameter : Dr. W. B. Newton 

 Royal Microscopical Society, at 8. — Exhibition of Microscope 

 Slides of Tsetse- Fly Dissections, Trypanosomes, etc. 



THURSDAY, November 16. 



Royal Society, at 4.30. — The Physical and Chemical Properties of Iron 

 Carbonyl: Sir James Dewar, F.R.S., and H. O. Jones.— The Transit of 

 Ions in the Electric Arc : A. A. Campbell Swinton— First Photographs 

 of the Canals of Mars : Prof. Percival Lowell.— On the Laws of Radia- 

 tion : J. H. Jeans.— The Pressure of explosions. Experiments on Solid 

 and Gaseous Explosives : J. t£. Petavel.— On Newton's Rings formed by 

 Metallic Reflection: Prof. R. C. Maclaurin.— The Accurate Measure- 

 ment of Ionic Velocities : Dr. R. B. Denison and Dr. B. D. Steele. 



Chemical Society, at 8.30.— Silicon Researches, Part ix., Bromination 

 of Silicophenyl Imide arid Amide, and Formation of a Compound in- 

 cluding (SiN): J. E. Reynolds. — Condensation of Ketones with 

 Mercury Cyanide: J. E. Marsh and R. de T- F. Struthers — Applica- 

 tion of the Microscopic Method of Molecular Weight Determination to 

 High Boiling Solvents : G. Barger and A. J. Ewins.— Green Compounds 

 of Cobalt produced by Oxidising Agents: R. G. Durrani.- Synthesis 01 

 Tertiary Menthol and of Inactive Menthene : W. H. Perkin, Jun.— 

 Optically Active Reduced Naphthoic Acids, Part i., Dcitr'-J'- "' <>- 

 dihydro-i-naphthoic Acid: R. H. Pickard and A. Neville. 



Linnean Society, at 8.— Contributions to the Embryology of the 



Amentifera: : Dr. Margaret Benson, Elizabeth Sanday and Emily 



Berridge.— On the Ears of certain Sharks : Pror. Chas. Stewart, F.R.S 



FRIDAY, November 17. 



Institution of Mechanical Engineers, at 8.— The Seventh Report 

 of the Alloys Research Committee ; On the Properties of a Series 

 Iron Nickel- Manganese-Carbon Alloys: Dr. H. C. H. Carpenter, 

 R. A. Hadlield, and P. Longmuir. 



CONTENTS. page 



Strength of Materials 25 



A Handbook of Flower Biology. By I. H. B. ... 26 

 A French Book on Sport and Trapping. By R. L. . 26 

 Our Book Sbelf :— 



Lorentz : " Ergebnisse und Probleme der Elektronen- 



theorie."— Dr. H. A. Wilson 27 



Zeidler : "Die elektrischen Bogenlampen, deren 

 Prinzip, Konstruklion und Anwendung." — H. 



Bohle 27 



Wilson: "Transactions of the South African Philo- 

 sophical Society." — W. G 2S 



Pearson: " Problems in Practical Physics" . '. . . 2S 

 Letters to the Editor : - 



Terminology in Electro-physiology. — Prof. J. S. 



MacDonald .... 2S 



The Leonid Meteors, 1905.— John R. Henry . . 2S 



Border occasionally seen between Light and Dark 

 Regions on Photographic Plates.— Dr. F. J. Allen ; 



R. Child Bayley 29 



The Use of Gasoline in Chemical and Physical 



Laboratories.— J. K. Foster 29 



The Aeger in the Rivers Trent and Ouse. (Illus- 

 trated.) By W. H.Wheeler 29 



Survey of the Simplon Tunnel. By W, E. P. . . 30 

 Bursaries at the Royal College of Science. Prof. 



John Perry, F.R.S 32 



Dr. Ralph Copeland. By W. E. H 32 



Captain F. W. Hutton, F.R.S. By H. B. W. . . 32 



Notes 33 



Our Astronomical Column : — 



Italian Observations of the Recent Solar Eclipse . . 38 



Martian Meteorology 38 



A 300- Year C)cle in Solar Phenomena 38 



Some Suggestions on the Nebular Hypothesis .... 38 

 Systematic Error in Transit Observations of Jovian 



Spots 3§ 



The Orbit of a Corona: Borealis 39 



Radial Velocities of Cettain Variable Stars 39 



Vaiiability of the Asteroid (444) Gyptis 39 



Conference of Delegates of Local Scientific 



Societies 39 



Zoology at the British Association 39 



Educational Science at the British Association . . 41 

 The Scottish National Antarctic Expedition. [Illus- 

 trated.) 4 2 



The Percy Sladen Expedition in H.M.S. Sealark. 



By J. Stanley Gardiner 43 



Some Characteristics of American Universities. 



By Principal H. R. Reichel 44 



University and Educational Intelligence .... 46 



Societies and Academies 47 



Diary of Societies 4S 



no. 1880, VOL. "J 2) 



