26 



NATURE 



[March 6, 1913 



H. E. Corke. Pp. xi+ 184 + plates. (London : Cassell 

 and Co., Ltd.) -6s. net. 



Percentage Compass for Navigators, &c. Bv J. C. 

 Fergusson. (London : Longmans and Co') Un- 

 mounted, 2s. 6d. net ; mounted, 3s. 6d. net. 



The Bandot Printing Telegraph System. Bv H. W. 

 Penday. Pp. iii+147. (London: Whittaker and Co.) 

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A First Book of Electricity and Magnetism. By 

 VV. P. Maycock. Fourth edition. Pp. xxii 4-351. 

 (London : Whittaker and Co.) 2s. 6d. net. 



The Design of Alternating Current Machinery. Bv 

 J. R. Barr and R. D. Archibald. Pp. xvi 4- 496 + xvi 

 plates. (London: Whittaker and Co.) 12s. 6d. net. 



Dahlias. By G. Gordon. Pp. xi + 1 15 + viii coloured 

 plates. (London and Edinburgh : T. C. and E. C. 

 Jack.) is. 6d. net. 



Practical Bird-keeping. Edited by J. L. Bonhote. 

 Pp. xvi + 142 + plates. (London: West, Newman and 

 Co.) 5s. net. 



Das Relativitatsprinzip. By Dr. M. Laue. Zweite 

 Auflage. Pp. xii + 272. (Braunschweig: F. Vieweg 

 und Sohn.) 8 marks. 



Reports of the Committee on Electrical Standards 

 appointed by the British Association for the Advance- 

 ment of Science. Reprinted bv Permission of the 

 Council. A Record of the History of "Absolute 

 Units" and of Lord Kelvin's Work in Connection 

 with These. Pp. xxiv + 783+ 10 plates. (Cambridge 

 University Press.) 12s. 6d. net. 



Psychology and Industrial Efficiency. Bv H. 

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DIARY OF SOCIETIES. 



THURSDAY, March 6. 

 (oval Society, at 4.3c— An Automatic Method for the Investigation 

 of the Velocity of Transmission of Excitation in Mimosa: Prof. 

 I. C. Dose.— The Evolution of the Cretaceous Asteroidea : W. K. 

 Spencer.— A Preliminary Note on the Fossil Plants of the Mount Potts 

 Beds, New Zealand, collected by Mr. D. G. Lillie, Biologist to Capt 



Scott's Antarctic Expedil 

 Newell Arber. — (1) Trypanosou 

 Living in the Sleeping Sicknes 

 Diseases of Domestic Animals ii 

 IKIeine) : (3) Morphology of Var 

 Disease in Man in Nyasaland. 1 

 Bruce, F.R.S., Majors D. H 



the Tcr 



A'o-.-r, 



Dr. E. A. 



found in the Blood of Wild Animal 

 Area, Nyasaland ; (2) Trypano 

 Nyasaland— II. Trypanosoma ca 

 >us Strains of the Tr'ypanosome cat 

 The Human Strain : Surg.-Gen. S 

 d A. E. Hamerton, and Lady B 



Roval Institution," at 3.— Surface Energy : W. B.Hardy. 

 Institution of Electrical Engineers, at 8.— Recent Developments in 



the Street Lighting of Manchester : S. L. Pearce and H. A. Ratcliff. 

 R " ML Society of Arts, at 4.30.— Indian Section— The City of Karachi : 



Linnean Society, at 8.— Discussion : The Development and Inheritance 

 il Characters— Opener : G. Smith. 



FRIDAY. March 7. 

 Royal Institution, at o.-Photographv of the Paths of Panicles Ejected 

 from Atoms : C. T. R. Wilson. 



SATURDAY, March S. 



-The Properties and Constitution of the Atom : 



sa Fuel for Domestic Purpose 



Greater 



Royal Institution, at 

 Sir J. J. Thomson, O.M. 



MONDAY, Mi 

 Royal Society of Arts, at 8.— Coal Ga' 



F. W. Goodenough. 

 Royal Geographical Society, at 8.30. 



TUESDAY, March ii 

 Royal Institution, at 3 .-The Movements of the Sta 



: Prof. H. H. Turner. 

 Mineralogical Society, at 5.30.— The Mineral Collection of Thomas 

 Pennant (1726-1708) : W. Campbell Smith.-The Minerals and Mineral 

 Localities of Montgomeryshire : Arthur Russell.— A New Stenographic 

 Protractor : Dr. G. F. Herbert Smith.-A (sixth) List of New Mineral 

 ! L. J. Spencer. 

 Illuminating Engineering SoctETY.at 8.— The History of Gas-liehtine 

 in this Country : W. J. Liberty. "S™ng 



Institution of Civil Engineers, at 8.— Notes on City Passenger- 

 Transportation in the Llnited States : G. D. Snyder. 

 WEDNESDAY, March 12. 

 Arts, at 8.— The Use of White Lead in Painting : 



Royal Society o 



Noel Heaton. 

 Institute of Ci 



Chemist " in a P] 



I ICAI. SO' 



Roval Meteorological Socif 

 Past aid Present : R. G. K. L 



stry, at 8.— 'the Function and Scope of "The 

 tical Works : C A. Hill. 



Some Research : A. P. Thurston. 



, at 7.30.— British Weather Forecasts: 



pfert. 



THURSDAY, March 13. 

 at 4.30.— Ptohable Papas : A Simple Method of Finding 

 :<■ Period of Stable Systems : A. Mallock.— The Motion of 



Royal Sociei 

 the Approxii 



NO. 2262, VOL. 91] 



Electrons in Gases: Prof. J. S. Townsend and H. T. Tizard.— The Self 



Inductance of Circular Coils of Rectangular .Seciion : Prof. T. R. Lyle. 



—Ammonium Ferrous Sulphate and its Alkali-Metal Isomorphs : Dr. 



A. 1.. H. Tutton.— The Recombination of the Ions produced by Rontgen 



Rays in Gases and Vapours : H. Thirkill.— Optical Investigation of 



Solidified Gases. III. The Crystal-properties of Chlorine and Bromide.: 



Dr. W. Wahl. 

 Royal Institution, at 3.— Surface Energy : W. B. Hardy. 

 Institution of Electrical Engineers, at 8. — Power Supply on the 



Rand : A. E. Hadley. 

 Concrete Institute, at 7.30.— Discussion ot Reports of the Reinforced 



Concrete Practice Standing Committee on : (1) Cracks in Concrete" : 



(2) Surface Treatment of Concrete. 

 Institution of Mining and Metallurgy, at 8.— Annual General 



Meeting. 

 Mathematical Society, at 8.— Some Cases of Tidal Motion of Rotating 



Sheets of Water : J. Proudman. — Indeterminate Equations of the Third 



and Fourth Degree : L. J. Mordell. 

 Society of Dyers and Colourists, at 8. — Stripping Agents for Garment 



Dyers : F. G. Newbury.— A Few Notes on Fur Dyeing : M. C. Lamb. 



FRIDAY, March 14. 



Royal Institution, at 9.— Great Advance in Crystallography : Dr. A. E. H. 



Mechanical Engineers, at 8. 

 Society (University College, Gower Street), "at 5. — Demonstra- 

 tion of Spark Photographs : W. B. Haines.— (1) Some Oscillograms of 

 Condenser Discharges and a Simple Theory of Coupled Circuits ; (2) Ex- 

 hibition of Braun Kathode-Ray Tubes and an Electrostatic Machine for 

 Working them, used as a High-frequency Oscillograph: Prof. J. A. 

 Fleming. — The Stretching and Breaking of Sodium and Potassium : E. Ii. 

 Baker. — The Latent Heat of Evaporation of Aqueous Salt Solutions: 

 R. G. Lunnor. — Some Flame Spectra : Dr. E. N. da C. Andrade. 

 Royal Astronomical Society, at 5. 



SATURDAY, March 15. 

 Royal Institution, at 3. — The Properties and Constitution of the Atom : 

 Sir J. J. Thomson, O.M. 



CONTENTS. page 



Scientific Worthies. XL. — Sir J. J. Thomson, 

 O.M., F. R.S. {With Portrait.) By Prof. Augusto 



Righi . 1 



An English Text-book of Protozoology 5 



Chemistry and its Applications. By W. A. T. . . . .6 



Practical Mathematics 7 



Our Bookshelf & 



Letters to the Editor: — 



The Spectra of Neon, Hydrogen, and Helium. — Prof. 



A. Fowler, F.R.S o, 



The Influence of Icebergs on the Temperature of the 



Sea.— Dr. John Aitken, F.R.S 10 



Systems of Lines obtained by Reflection of X-Rays. — 



Dr. E. Hupka ; W. Steinhaus 10 



Four-horned Sheep in Scotland. — Dr. James Ritchie 10 

 The Tribes of Northern and Central Kordofan. 



(IUustratcdA M 



A Memorial to Sir Joseph Hooker 1.2 



Sir William Henry White, K.C.B., F.R.S 12 



Prof. Adam Sedgwick, F R.S 14 



Notes 15 



Our Astronomical Column : — 



Discovery of a Comet 19121/ 19 



An Interesting Occupation 19 



Publications of the Vienna Observatory 20 



Astronomical Y ear-Books ..... .... 20 



The Eugenics Education Conference. By E. H.J. S. 20 



Napier Tercentenary Celebration ...... . . 20 



The Method of " Shock-Excitation " in Wireless 



Telegraphy 21 



A Superannuation Scheme for English University 



Teachers . . 21 



University and Educational Intelligence 22 



Societies and Academies 23 



Books Received 25 



Diary of Societies 26 



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Editorial Communications to the Editor. 

 Telegraphic Address: Phusis, London. 

 Telephone Number : Gerrard 8830. 



