248 



NATURE 



[October 29, 1914 



The Cambridge Pocket Diary, 1914-1915. Pp. xv + 

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 Egmont. Pp. X + 302. (Cambridge University Press.) 

 9s. net. 



The Map and its Story : A Physical Atlas. Pp. 44. 

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 H. Wildon Carr. Pp. xii + 216. (London : Macmillan 

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Elementary Mathematical Analysis. By Prof. C. S. 

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Bartholomew's Reduced Survey Map of N.E. 

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DIARY OF SOCIETIES. 



THURSDAY, October 2q. 

 Institution of Ei,ectrical Engineers, at 8.— Inaugural Address by the 



President. 

 Child Study Society, at 7.30.— After Care of Mental Defectives : Miss 

 E. Fox. 



FRIDAY s October 30. 

 Institution of Mechanical Engineers, at 8. — Thomas Hawksley 

 Lecture : Pumping and Other Machinery for Waterworks and Drainaere : 

 W. B. Bryan. * 



SATURDAY, October 31. 

 Essex Field Club (at the Essex Museum of Natural History, Stratford), 

 at 6.— The Evolution of the Essex Stour: G. H. Boswell — Note on a 

 Fossiliferous Exposure of London Clay at Chingford : A. Wrigley. 



MONDAY, November 2. 

 Society of Engineers, at 7.30.— Uses of the Hydraulic Mining Cartridge : 

 J. Tonge. 



NO. 2348, VOL. 94] 



TUESDAY, November 3. 

 R6NTGEN Society, at 8. rs.— Presidential Address : Sir Alfred Pearce Gould. 

 Institutionof Civil Engineers at 8.— Inaugural Meeting of the Session. 

 Presidential Address : B. Hall Blyth. 



WEDNESDAY, November 4. 



Society of Public Analysts, at 8. — The Addition of Foreign Substance 

 to Flour, with Special Reference to Persulphates : A. K. Tankard. — 

 (i) Note on Bleached and Unbleached Flour ; (2) Methyl R«d as an 

 Indicator : R. T. Thomson. — Two Rapid Methods of Estimating Water 

 in Crude Petroleum, Oil Fuel and Similar Substances : H. S. Shrewsbury. 

 — Note on Vinegar : J. S. Jamieson. 



Geological Society, at 8. — The Inferior Oolite and Contiguous Deposits 

 of the Doulting-Milbourne-Port District (Somerset): L. Richardson. — 

 Some Inferior Oolite Pectens : E. Talbot Paris and L. Richardson. 



Entomological Society, at 8. — The Larva of Polyoinmatus zephyries 

 var. lycidas : Dr. T. A. Chapman. 



THURSDAY, November 5. 



Royal Society, at 4.30. — Probable Papers: Luminous Vapours Distilled 

 from the Air, with Applications to the Study of Spectrum Series and their 

 Origin, II. : Hon. R. J. Strutt. — The Production of Neon and Helium 

 by the Electrical Discharge : Prof. J. N. Collie, H. S. Patterson, and 

 I. Masson. — The Flow of Viscous Fluids through Smooth Circular Pipes : 

 Prof. C. H. Lees. — Quantitative Measurements of the Absorption of 

 Light. I. : The Molecular Extinctions of the Saturated Aliphatic 

 Ketones : F. O. Rice. — The Ignition of Gases by Condenser Discharge 

 Sparks: Prof. W. M. Thornton. — The Spark Spectrum of Nickel under 

 Moderate Pressures : E. G. Bilham. 



Child Study Society, at 7.30. — Classification of the Deaf Child for Edu- 

 cational Purposes : P.M. Yearsley. 



CONTENTS. PAGE 



Science and the State • 221 



Crops, Stock, and Soil. By E. J. R 222 



The Evolution of Philosophical Thought. By Capt. 



J. H. Hardcastle 223 



A North African Race. By H. G. L 224 



Collected Addresses on Horticulture 225 



Our Bookshelf 225 



Letters to the Editor: — 



Accumulated Rainfall at Excessive Rates. — Prof. 



Alexander McAdie 226 



Fizeau's Experiment and the Principle of Relativity. 



— E. Cunningham 226 



Flint Fracture.— J. Reid Moir . 227 



Towards Nature- Study. {Illustrated.) 227 



The Total Solar Eclipse of August 21, 1914: — 



(i) The Royal Observatory Eclipse Expedition to 

 Minsk, Russia. {Illustrated. ) By H. S. Jones ; 



C. R. Davidson 230 



(2) The Amherst Eclipse Expedition to Russia. {Illus- 

 trated.) By Prof. David Todd 232 



The British Association in Australia 232 



Notes 236 



Our Astronomical Column :— 



The Rotation Periods of Two of Saturn's Satellites . . 239 



Difference of Longitude Between Paris and Nice . . 239 



Effect of Humidity on Photographic Plates 239 



Tests of a 24-in. Objective 240 



The Rectorship of the University of Glasgow . . . 240 



The Royal Anthropological Institute 240 



Problems of the Antarctic. By Dr. R. N. Rudmose 



Brown ... . . . 241 



Climate as Tested by Fossil Plants. By Prof. A. C. 



Seward, F.R.S 242 



University and Educational Intelligence 246 



Societies and Academies 247 



Books Received 247 



Diary of Societies 248 



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Editorial Communications to the Editor. 



Telegraphic .Address : Phusis, London. 

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