24 



NA TURE 



[May 3, 1900 



reduction of a selenate by hydrogen or by carbon, by the action 

 of hydrogen selenide upon the vapours of lead chloride, and by 

 the direct fusion in the electric furnace of precipitated lead 

 selenide. — On the alkaline selenioantimoniles, by M. Pouget. 

 Selenio-antimonites can be obtained of analogous composition 

 to the sulpho-antimonites already known ; mixed sulphur and 

 selenium compounds, thioantimonites in which the sulphur is 

 only partially replaced by selenium have also been prepared. — 

 Micro-chemical researches on yttrium, erbium and didymium, 

 by MM. M. E. Pozzi-Escot and H. C. Couquet. — Mechanism 

 of the senility and death of nerve cells, by M. G. Marinesco. 

 As the result of a study of nerve cells from the brain and spinal 

 column of individuals of ages ranging /rom 60 to no, it was 

 found that the modifications constituting the old age of the nerve 

 cell do not only consist of the diminution, more or less marked, 

 of this body, but include other more interesting changes, some 

 of which, tangible to the microscope, are described. — Hetero- 

 plastism, by M. Nicolas- Alberto Barbieri. — A determination of 

 the conditions under which tissue from one mammal can be 

 grafted on to another, to replace similar tissue. The results of 

 experiments are given on the grafting of muscular, vascular, and 

 nervous tissue. 



DIARY OF SOCIETIES. 



THURSDAY, May 3. 



Royal Institution, at 3.— A Century of Chemistry in the Royal Insti- 

 tution : Prof. J. Dewar, F.R.S. 



LiNNEAN Society, at 8.— Note on the Movements in Fishes : Prof. R. J. 

 Anderson.— On New Species of //a///wrfa, from Funafuti: Miss E. S. 

 Barton.— On West Indian Fungi : Miss'A. L. Smith. 



Chemical Society, at 8.— Brazilin, Part IV. : A. W. Gilbody, W. H. 

 Perkih, jun., and J. Yates.— Haematoxylin, Part V. : W. H. Perkin, 

 jun.,and J. Yates —The Substituted Nitrogen Chlorides and Bromides 

 derived from o- and /-acet-toluide and their Relation to the Substitution of 

 Halogens in Toluides and Toluidines : F. D. Chattawayand K. R. P. 

 Orton. 



RoNTGEN Society, at 8.— Demonstration and Exhibition of NewMethods 



and Results. 

 Institution of Electrical Engineers, at 8.— If the discussion on 



Prof. Forbes's Paper, read on April 26, is concluded, the following Paper 



will be read:— The Calculations of Distributing Systems of Electric 



Traction under British Conditions : H. M. Sayers. 



FRIDA y, May 4. 

 Royal Institution, at 9 —Pottery and Plumbism : Prof. T. E. Thorpe, 



Geologists' Association, at 8.— Some Features of the Recent Geology 

 of Western Norway : Horace W. Monckton. 



Cold Storage and Ice Association (Examination Hall, Victoria Em- 

 bankment), at 11.30.— Recent Researches in Refrigeration : G. Halliday. 



—Insulation and Insulators : W. D. A. Bost. At 3.— Electric Lighting 



of Cold Stores: W. B. Esson.— The Design and Construction of Build- 

 ings for Ice Factories and Cold Storage : P. Gaskell. 



SA TURD A y, May 5- 



Royal Institution, at 3-— Egypt in the Middle A^es : Prof. Stanley 



Lane-Poole. 



MONDAY, May 7. 

 Society of Arts, at 8.— The Incandescent Gas Mantle and its Use : 



Prof. Vivian B. Lewes. 

 Society of Chemical Industry, at 8.— The Production of Nitrate of 



Soda in Chili : Dr. W. Newton. 



TUESDA y. May 8. 



Royal Institution, at 3.— A Corner of Sussex: Dr. H. R. Mill. 



Society of Arts, at 8.— Art Metal Work : Nelson Dawson. 



Zoological Society, at 8.30.— A List of the Batrachians and Reptiles 

 of the Gaboon (French Congo), with Descriptions of New Genera and 

 Species: G. A. Boulenger. F.R.S.— On the Birds of Hainan: W. R. 

 Ogilvie Grant.— On the Rhopalocera collected by the late Mr. John 

 Whitehead in the Interior of the Island of H.^inan : Philip Crowley. 



Royal Photographic Society, at 8.— The Effect of Colour on Grada- 

 tion : Chapman Jones. 



WEDNESDAY, May 9. 



Society of Arts, at 8.— Improvement of our Ro.ids : A. Moresby White. 



Geological Society, at 8.-1 he Pliocene Deposits of the East of 

 England. Part II. The Crag of Essex (Waltonian) and its Relation to 

 that of Norfolk and Suffolk: F. W. Harmer. With a Report on the 

 Inorganic Constituents of the Crag by Joseph Lomas.— The Salt Lake of 

 Larnaca (Cyprus) : C. V. Bellamy. 



Iron and Steel Institute, at 10.30.— General Meeting.— On Blowing- 

 Kngines driven by Crude Blast-Furnace Gas: Adolphe Greiner.— The 

 .Solution Theory of Iron : Barjn H. von Juptner.— The Use of Fluid 

 Metal in the Open-Hearth Furnace: James Riley.— Iron and Phos- 

 phorus : J. E. Stead.— The Continuous Working of the Open-Hearth 

 b urnace : Benjamin Talbot. 



NO. 1592, voT,. 6: 



THURSDAY, May 10. 



Royal Society, at 4.30. — Probable Papers: On the Diffusion of Gold in 

 Solid Lead at the Ordinary Temperature : Sir W. Roberts-Austen, 

 F.R.S. — On Certain Properties of the Alloys of the Copper-Gold Series : 

 Sir W. Roberts-.\usten, F.R.S., and Dr. T. K. Rose.— Experiments on 

 Supposed Vascular and Visceral Factors in the Genesis of Emotion : Prof. 

 Sherrington, F.R.S. — On the Brightness of the Corona of April 16, 1893. 

 Preliminary Note : Prof. H. H. Turner, F.R.S. 



Royal Institution, at 3. — A Century of Chemistry in the Royal Insti- 

 tution : Prof. J. Dewar, F.R.S. 



Mathematical Society, at 5.30. — Special Meeting. — The Differential 

 Equation whose solution is the Ratio of Two Solutions of a Linear Dif- 

 ferential Equation : M. W. J. Fry. — A Congruence Theorem relating to 

 Eulerian Numbers and other Coefficients : Dr. Glaisher, F.R.S. 



Institution of Electrical Engineers, at 8. — A Frictionless Motor 

 Meter : S. Evershed. 



Iron and Steel Institute, at 10.30. — Ingots for Gun Tubes and Pro- 

 peller Shafts : F. J. R. CarruUa.— The Manufacture and Application of 

 Water-Gas : Carl Dellwik. — The Equalisation of the Temperature of 

 Hot Blast : Lawrence Gjers and Joseph H. Harrison. — The Manganese 

 Ores of Brazil : H. Kilburn Scott. — The Utilisation of Blast-furnace 

 Slag : Ritter Cecil von Schwarz (Li^ge). 



FRIDAY, May ii. 

 Royal Institution, at 9. — Shakespeare and True Patriotism : Sidney 



Lee. 

 Royal Astronomical Society, at 8. 



SATURDAY, May 12. 

 Royal Institution, at 3. — South Africa ; Past and Future: Dr. Alfred 

 P. Hillier. 



CONTENTS. PAGE 



Mount St. Elias. By G. W. L i 1 



A Hydrodynamical Theory of Action at a Distance. | 



By Prof. G. H. Bryan, F.R.S. 3 ^ 



Photo-micrography 4 



George Kingsley's Life and Writings. By R. L. . . 5 ■;, 

 Our Book Shelf:— \ 



King : " Irrigation and Drainage, Principles and i 



Practice of, their Cultural Phases."— W. H. C. . . 5 1 

 Davis : " The Refraction of the Eye, including a Com- * 



plete Treatise on Ophthalmometry. A Clinical Text- i 



book for Students and Practitioners."— E, E. ... 6 

 Hall : " A Key to the Birds of Australia and Tasmania, 

 with their Geographical Distribution in Australia." — 



R. L 6 



Rebiere : " Pages Choisies des Savants Modernes " . . 6 

 Kerville : " Les Vieux Arbres de La Normandie " . . 7 

 Letters to the Editor: — 



The Nature of the Solar Corona. — Prof. Geo. Fras. ' 



FitzGerald, F.R.S 7 



Rock-structures in the Isle of Man and in South 

 Tyrol.— Dr. Maria M. Ogilvie Gordon ..... 7 



Pompeii and its Remains. {Illustrated.) 7 



The Unveiling of the Huxley Memorial Statue . . 10 

 Preliminary Notes on the Results of the Mount 

 Kenya Expedition, 1899. {Illustrated.) By H. 'J. 



Mackinder 12 



The Duke of Argyll. By A. G 13 



Prof. A. Milne-Edwards. By R. L 15 



Notes. {Illustrated.) . 15 



Our Astronomical Column:— 



New Variable in Taurus 19 



Search Ephemeris for Eros 20 



Relation between Solar Activity and Earth's Motion . 20 

 Determination of Solar Parallax from Opposition of 



Eros 20 



Working Silica in the Oxy-gas Blowpipe Flame. 

 ( With Diagram. ) By W. A. Shenstone, F. R. S. , and 



H. G. Lacell 20 



University and Educational Intelligence 22 



Societies and Academies 23 



Diary of Societies 24 



