438 



NATURE 



[January 25, 10 12 



Lee. Pp. vii + 183. (New York: Columbia University 

 Press : London : H. Frowde.) 6*. fid. net. 



Sfn l''ii»ln*rif» : their Trrnsurej* and Toilt-rs. By Prof. 

 M. .A. H^rubel. Translated by B. .Miall. Pp. 36(>. 

 (London : T. Fisher Unwin.) loi. fid. net. 



.Maryland (ieological Survey. Lower Cretaceous. Pp. 

 63a. (Baltimore : Johns Hopkins Press.) 



Forest Physiography : Physiofjraphy of the United 

 States and Principles of Soils in relation to Forestry. By 

 Dr. I. Bowman. Pp. .\xii + 759. (New York: J. Wiley 

 and Sons; London: Chapman and Hall, Ltd.) 315. net. 



Handbuch der Pl»armakognosie. By A. Tschirrh. 

 Lieforung 22-38. (Leipzig : C. H. Tauchnitz.) 3 marks 

 each. 



Physico-chemical Calculations. By Dr. J. Kno.x. Pp. 

 viii+188. (London: .Methuen and Co., Ltd.) 2i. fid. 



Technical .Xrithmetic and Geometry. By C. T. Millis. 

 Second edition. Pp. xvi + 290. (London: .Methuen and 

 Co., Ltd.) 3s. fid. 



.\ First Year Physical Chemistry 

 Hilditch. Pp. .xx+iyfi. (London 



Ltd.) 35 

 J. H. 

 Bv Drs. 

 (Helder 



By Dr. T. P. 

 Methuen and Co., 



Van't Hofis Amsterdamer Periode, 1877-1895. 

 W. P. Jorissen and L. Th. Reicher. Pp. H)<i. 

 C. de Boer, jun.) 



.\ Junior Course of Practical Zoologv. Bv the lati' Prof. 

 A. Milnes Marshall, F.R.S.. and Dr. C. II. Hurst. 

 Seventh edition. Revised by Prof. F. \V. Gamble, F.R..S. 

 Pp. xxxvi + 515. (London : Smith, Elder and Co.) 

 \QS. fid. 



The Great Star Map. By Prof. H. H. Turner, F.R.S. 

 Pp. vi+159. (London: J. Murray.) 2s. fid. net. 



Heredity and Society. By VV. C. D. Whetham, F.R.S., 

 and C. D. \\'hctham. Pp. viii+190. (London: Long- 

 mans and Co.) fis. net. 



The Principle of Individuality and Value (the Gifford 

 Lectures for 191 1). By Dr. B. Bosanquet. Pp. xxxvii + 

 409. (London : Macmillan and Co., Ltd.) los. net. 



Fourth Report of the Wellcome Tropical Research 

 Laboratories at the Gordon Memorial College. Khartoum. 

 Vol. B. — General Science. By Dr. A. Balfour and others. 

 Pp- 333- (London : Bailli^re, Tindall and Cox.) 185. 

 net. 



Cocoa and Chocolate : their Chemistry and Manufacture. 

 By R. Whymper. Pp. xi+327. (London: J. and .\. 

 Churchill.) 155. net. 



.American Permian Vertebrates. By Prof. S. W. 

 Williston. Pp. 145 + plates. (University of Chicago Press; 

 Cambridge University Press.) 105. each. 



Jelineks Psychrometer-Tafeln. Anhang : Hygrometer- 

 Tafeln. By J. M. Pernter. Sechste, erweiterte .Auflage. 

 Pp. xii + 128, (Leipzig: VV. Engelmann.) 7 marks. 



DIARY OF SOCIETIES. 



THURSDAY, January 25. 



RovAL Society, at 4.30.— Determinaiion of the Co-efficient of Inter- 

 diffusion of Gases and the Velocity of Ions under an Electric Force, 

 in terms of Mean Free Paths: Prof. J. S. Townsend, F.R.S.— Note 

 on the Scattering of o- Particles : Dr. h. Geiger.— The Effect of Tem- 

 perature upon Radioactive Disintegration : A. S. Russell.— On the Rela- 

 tion between Current, Voltpee, Pressure, and the Length of the Dark 

 Space in Different Gases: F. W. Aston and H. E. Watson.— On the 

 Viscosities of Gaseous Chlorine and Bromine : Dr. A. O. Rankine.— The 

 Testing of Plane Surfaces : Dr. P. E. Shaw.— Antelope Infected with 

 T>yf>anosoma gambiense : Captain A. D. Fraser, R.A.M.C, and Di. 

 H. L. Duke. 



Royal Institution, at 3.— The New Astronomy : Prof. A. W. Bickerton. 



Institution op Ei.fctrical Encinerrs. at 8.— Heat Paths in Electrical 

 Machinery: Miles Walker and H. D. Symons. 



FRIDAY, Janlarv a6. 



Royal Institution, at 9.— The Pressure of a Blow : Prof. B. Hopkinson, 

 F.R.S. 



Physical Society, at 5.— Exhibition of a Direct-reading Instrument for 

 Submarine Cable and other Calculations : R. Appleyard.— On the Vibra- 

 tion Galvanometer and its Application to Inductance Bridges : S. Butter- 

 worth. — Note on a Negative Kesult connected with Radio-activity: 

 J. H. Vincent and A. Bursill.— On Sealing-metals : Dr. P. E. .Shaw.— 

 Krypton and the Auroral Spectrum : T. W. Page. 



SA TURD A Y, January 37. 

 Royal Institution, at 3.— The Banyoro : A Pastoral People of Uganda : 



(i) Birth and Death Customs ; Rev. J. Roscoe. 

 Essex Field Club (at the Essex Museum, Stratford. Essex), at 6.— 



weather Observations in connection with the Work of the Essex Field 



Club : William Marriott. 



^0A^/>.4}', January 29. 

 «oyal Society of Arts, at 8.— Ocean Waves, Sea-beaches, and S.ind- 

 banks : Dr. Vaughan Cornish. 



ROVA' MCAL Socir -Exploration in lb« CanatUau 



R<- ' . Norman C 



iNm : _ : UARIKS,at 5. tmeni of Life AMorance Fur..J« : 



«. K. May. 



TUESDAY, jANUAiev 30. 

 Royal Institijtion, at 3.— The Study of Genetics: Prof. \'> 



F.R.S. 

 RovAL Soamr or Arrs, at 4.90.— Irrigation in Souilt Aft. 



I.Cgg. 



ImTiTUTioH or Civn. Encikekiis, at 8.— T>e Central Hf..:.r < 



Power-plant of McGill Univertiiy, Montreal : R. J. Durley. 

 WEDNESDAY, January 31. 

 Royal Socicty op Akts, at 8.— Recent ProcrcM ia Radio : 



Prof. G. W. Oiibom Howe. 



THURSDAY, Febhuary i. 

 KoYAL Societv, at ^.ya.—l'robahlt Pat€rt : The Bacterial Prodoction of 



Acctylmethylcarbinoland Butylene Glycol from V.irious VuS^tanrr* : Dr. 



A. Harden, F.R.S.. and Mim D. Norrit.— On ■■ 



Nervct of the Dental Pulp: J. H. Mummery.— ' 



and Cultivating thf Mycobacterium Pneudo Tub' 



JOhne, and some F.xperiments on the Preparation • . I ■ i. 1 



for Pieudo Tuberculosis enteritis oi l>ovine»: F. \N' 1 *» ri .i,'. '. 



Ingram.— On the Fos»il Flora of the KoreM '.f Dr . I ': ■■ c, 



shirr), and the Relationship of the Coairii-li: 



.South Wales : E. A. N. Arber -The Chet . « 



(Jordan) on Glucose and Mannitol : J. Tti jur 



Contrast : Dr. F. W. Edridge-Green. 

 LiNNKAN Society, at 8. — Fourmis des Seychelles re^oet de M. Hugh 



Scott: Prof. A. Forel.— Tipulidx from the Indian Ocean: F. W. 



Edwards. — Sciaridc, mit einem Anhang von Dr. J. J. Kieffer (8«v ■ 



bung neuer Sciariden von den Seychellen Inscln): f>r. Gfinther Endt- 



— Ichncumonidz from the Indian Ocean: C. Morley. — New Fishes ' 



Aldabra and Assumption, collected by "Mr. J. C. F. Fryer; C. Tate 



Regan. 

 Royal Institution, at 3.— The Phenomena of Splashes: Prof. A. M. 



Worthington, C.B., F.R.S. 



FRIDAY, Frbruarv ». 

 RovAL Institution, at 9.— Vital Effects of Radium and other Ray* : 



J. M. Davidson. 

 Institution of Civil ENCiNeeRs, at 8.— Steam-turbine* : Some 1 



tical Application* of llieory : Captain H. Riall Sankey, R F. 



CONTENTS. PAGi 



Ancient Hunters 405 



Stability in Aviation. By W. H. W 406 



Stammering. Ky Prof. John G. McKendrick, F.R.S. 407 

 Black and White in South-east Africa. By Sir 



H. H.Johnston, G. CM. G., K.C.B 408 



Encyclopaedic Photography. By C. J 409 



Mathematics for Teachers. By G. B. M 409 



Our Book Shelf 410 



Letters to the Editor: — 



Microscope Stand.s. — ^J. E. Barnard 412 



The Teaching of Electricity in Schools. — Prof. A. M. 



Worthington, C.B., F.R.S 413 



Glazed Frost. — Chas. Harding 414 



The Isothermal Layer of the Atmosphere. — Com- 

 mander Campbell Hep worth 414 



Concentric Joints in Ice. {With Diagram.) — Harold 



J. F. Gourley 4' 4 



The L.-ite M. Kadau.— Dr. A. M. W. Downing, 



F.R.S 414 



The Luminosity of Cats' Eyes.— A. R. Hunt . . . 414 

 Growth and Shrinkage of Glaciers. {Illuslrated.\ 



By Prof. T. G. Bonney, F.R.S 



Celestial Spectroscopy 



"Yellow Jack." {Illustrated.) By R. T. H 4^0 



The Journals of the First Surveyor-General of India. 



By H. G. L : - 



Notes 



Our Astronomical Column : — 



Schaumasse's Comet, 1911A 



The Distribution of Brightness in the Tail of Ilalley's 



Comet . 4-3 



Observations of Planets 423 



The " Annuaire" of the Bureau des Longitudes, 1912 424 

 The Radial Velocities and Spectral Types of Stars. 



By William E. Kolston 424 



Educational Conferences Considered in Relation to 



Science in Public Schools. II. By G. F. Daniell 425 



Bird-Notes. By R. L.v ' 426 



The Institute of Metals 427 



Oxford Meteorological Observations 428 



American Archaeological Problems 428 



The Use of Phosphatic Fertilisers in France . . . 429 



The Carbonisation of Coal. By Prof. Vivian B. Lewes 429 



University and Educational Intelligence 434 



Societies and Academies 434 



Books Received 437 



Diary of Societies 438 



NO. 2204, VOL. 88] 



