iS: 



NATURE 



[April 17, 19 13 



Bern aus dem Jahr 1912. Pp. xlvi + 340 + •* plates. 

 (Bern : K. J. Wyss.) ' 



Ministere de l'Agriculture. Direction Generate des 

 Eaux et Forets. 2« Partie. Eaux et Ameliorations 

 Agricoles. Service des Grandes Forces Hydrauliques 

 dans la Region des Alpes. Tome v. Resultats des 

 Etudes et Travaux a la Fin de 191 1. Pp. 530. (Pub- 

 lisher's name not given.) 



A Course of Elementary Workshop Drawing. By 

 H. A. Darling. Pp. vi+172. (London: Blackie and 

 Son, Ltd.) is. 6d. 



The Origin and Antiquity of Man. Bv Dr. G. F. 

 Wright. Pp. xx + 547. (London: J. Murray.) 8s. 

 net. 



The Important Timber Trees of the United States. 

 By S. B. Elliott. Pp. xix + 382. (London: Constable 

 and Co., Ltd.) 10s. 6d. net. 



The Potato. By E. H. Grubb and W. S. Guilford. 

 Pp. 545. (London : Constable and Co., Ltd.) 8s. 6d. 

 net. 



Handbuch der Arbeitsmethoden in der anorganischen 

 Chemie. By Dr. A. Stahler. Erster Band. Pp. xii + 

 7 s "- (Leipzig: Veit and Co.) 25 marks. 



Annales de l'Observatoire National d'Athenes. By 

 Prof. D. Eginitis. Tome vi. Pp. 333 4- plates. 

 (Athens : A. Raftanis.) 



Abel's Laboratory Handbook of Bacteriology. 

 Second English Edition. By Dr. M. H. Gordon and 

 others. Pp. xi + 251. (London: H. Frowde and 

 Hodder and Stoughton.) 5s. net. 



Missouri Botanical Garden. Twentv-third Annual 

 Report. Pp. 2074-7 plates. (St. Louis, Mo.: The 

 Board of Trustees.) 



L'Uomo Attuale una Specie Collettiva. By V. 

 Giuffrida-Ruggeri. Pp. viii + 192 + xiii plates. (Milan: 

 Albright, Segati e. C.) 6 lire. 



Mitteilungen aus den deutschen Schutzgebieten. 

 Edited bv Dr. H. Marquardsen. Erganzungsheft, 

 Nr. 6, Ergebnisse einer Reise durch das Zwischenseen- 

 gebiet Ostafrikas 1911. By H. Meyer. Pp. iii4- 127 + 

 viii plates. (Berlin : E. Siegfried Mittler und Sohn.) 

 3.60 mark-;. 



Die antike Tierwelt. Bv O. Keller. Zweiter Band. 

 Pp. xv + 618+2 plates. (Leipzig: W. Engelmann.) 

 17 marks. 



The Continents and Their People. Asia : a Supple- 

 mentary Geography. Bv J. F. and A. H. Chamber- 

 lain. Pp. vi+KiS. ("London: Macmillan and Co., 

 Ltd.) 3s. 



DIARY OF SOCIETIES. 



THURSDAY. April 17. 

 Royal Society, at 4.10.— The Luminosity Clirves of Persons having Nor- 

 mal and Abnormal Colour Vision : Dr. W. Watson.— The Reflection of 

 X-Rays by Crystals : Prof W. H. Bragg and W. L. Bragg.— A 

 Srectrum of Iodine Vapour : Prof. I C. McLennan— The 

 the Crystal-symmetry of the_ Simpler Organic Com- 



I. Recent 

 Some B11I- 

 npling and 



pounds and their Molecular inrtst tut 

 Roval Institution, al 1.— The Prog 



Explorations : Prof. J. Garstang. 

 Institution of Mining and Metallurgy, at 8.— Notes 

 garian Mineral Deposits : H. K. Scott.— Notes on the J 

 Mill, Pachuca, Mexico: I. P. Holcombe —Errors in 5 

 Assaying Ores due to the Presence of Coarse Gold : F. Wh..„ 

 Royal Societv of Arts, ai 4 ,0.— The Burma Oil Fields : N. G. Cholmeley. 

 I Society, at S.— An Account of the Plants Collected by Mr M. P. 

 the Carruther- MilM-l'rice Expedition through North-u-esl 

 M. P. Price and N. D. Simpson, - 

 : Hisayoshi Takeda. 

 FRIDAY, April iS. 

 Royal Institution, at 9. — Applications of Polarised Light : Dr. T. M. 





Prof. Gibson. 



; Mechanical ENGINEERS, at 3.— Presidential Address.— 

 olute Chambers and Guide-passages for Centrifugal Pumps : 



nfectants. I. : Dr. D. 



Royal Society of 



Sommervitle. 

 Victoria Institute, at 4.30.— The Samaritan Penlateuch, and Philological 



Questions connected therewith : Rev. J. I. Munro. 

 Institution of Civil Engineers, at 8.— Production of Steel Sections 



and their Application in Engineering Structures : A. T. Walmisley. 



NO. 2268, VOL. 91] 



Prof. W. Ba 



and Othc 



TUESDAY, April 22. 

 Royal Institution, at 3.— The Heredity of Sex and Some Cognati 



Problen 

 Royal Ai 



Joyce.— Prel 



and Cbarentt 

 Institution of Civil Engineers, at 8. — Assuan Dam : Protection of 



Down-stream Rock Surface, and Thickening and Heightening: M. 



Macdonald. 

 Zoological Society, at 8.30.— The Polyzoa of Waterworks : Dr. S. F. 



Harmer. — The Marine Fauna of British East Africa and Zanzibar, from 



Collections made by Cyril Crossland. in the Years 1901-2. Bryozoa— 



Cheilostumata : A. W. Waters. — Notes 



Reedbuck {Cerz'icapra arundhntm\ and 01 



Distribution of Sharpe's Steenbuck (Ra 



St 



-H.t 



liltO 



Albinism in the Common 

 the Habits and Geographical 

 >hiccros sharpci) : Major J. 



WEDNESDAY, April 23. 



Royal Society of Arts, at 8. — The Design and Architectural Treatment 

 of Shops : H. V. Lanchester. 



Geological Society, at 8. — The Fossil Flora of the Pembrokeshire Portion 

 of the South -Wales Coalfield : H. Goorle.— The Halesowen Sandstone 

 Series of the Southern End of the South Staffordshire Coalfield : H. Kay. 



Aeronautical Society, at S.30. — Aeroplane Construction: A. R. Low. 



THURSDAY, ArniL 24. 



Royal Society, at 4.30. — Probable Papers: (1) Protostigmata in Ascidians : 

 (2) The Origin of the Ascidian Mouth : A. G. Huntsman. — Experiments on 

 the Kidneys of the Frog : F. A. Bainbridge, S. H. Collins, and J. A. Menzies. 

 — (1) The Probable Value to B. coli of "Slime" Formation in Soils; 

 (2) Variation in B. coli. The Production of Two Permanent Varieties 

 from One Original Strain by Means of Brilliant Green : Cecil Revis. 



Royal Institution, at 3.— The Progress of tiittite Studies. II. Religious 

 Monuments of Asia Minor: Prof. J. Garstang. 



Society of Dyers an 

 istry of the Vat Dye 



Institution of Elec 

 G. Kapp. 



Concrete Institute, 



Colourists (Londo 

 : E. de B. Barnett. 

 -rical Engineers, i 



rion), at 8.— The Chem- 

 - Phase Advancing : Dr. 



7.30. — Discussion 01 

 ing Committee on : (1) A Standard Notatic 

 Calculations : (2) A Standard Specification for Reinforced Concrete 

 Work ; (3) Standard Connections and Joints in Reinforced Concrete. 



CONTENTS. page 



A Text-book of Human Physiology 157 



Typical Ammonites 157 



Topography and Travel 15S 



Our Bookshelf 15^ 



Letters to the Editor: — 



Soil Fertility.— F. Fletcher : Dr. E. J. Russell . . 160 

 Induced Cell-reproduction in the Protozoa. — Aubrey 



H. Drew 160 



Units of Pressure in Vacuum Work.— W. H. Keesom 161 

 Reflection of X-Rays and X-Ray Fringes. '{Willi 



Diagram.) — M. de Broglie 161 



Increase of Definition in a Moving Telescope. — 



M. E. J. Gheury 162 



The Ninth International Congress of Zoology at 



Monaco 162 



The International Congress of Historical Studies . 165 



Public Veterinary Services 166 



Notes . 166 



Our Astronomical Column : — 



The Question of Radium in the Chromosphere . . . 171 



Dedication of the New Allegheny Observatory . . 171 

 General Index to the Memoirs of the Society of Italian 



Spectroscopists 171 



National Aspects of Education. By Prof. R. A. 



Gregory 171 



Variations in Atmospheric Circulation in Tem- 

 perate Latitudes. By E. Gold 174 



Gyrostats and Gyrostatic Action. (Illustrated.) By 



Prof. Andrew Gray, F.R.S 175 



University and Educational Intelligence 179 



Societies and Academies . . 180 



Books Received 181 



Diary of Societies 1S2 



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Editorial Communications to the Editor. 

 Telegraphic Address : Pnusis, London. 

 Telephone Number: Gerkard 8830. 



