8o 



NATURE 



[March 27, 1919 



By Georges Truffaut, with the collaboration of Helen 

 Colt. Pp. 65. (Versailles : CEuvre des Pepini^res 

 Nationales du Touring-Club de France, 1919.) 



Botany : A Text-book for Senior Students. By 

 D. Thoday. Second edition. Pp. xix+524. (Cani- 

 bridge : At the University Press, 19 19.) 7s. 6d. net. 



The Principles of Mental Hygiene. By Dr. William 

 A. White. With an Introduction by Dr. S. E. Jelliffe. 

 Pp. xiv + 323. (New York: The Macmillan Co.; 

 London : Macmillan and Co., Ltd., 1917.) 105. 6d. 

 net. 



Elements de Botanique. Par Prof. Ph. Van 

 Tieghem. Cinqui^me Edition. Par Prof. J. 

 Costantin. Tome i. : Botanique G^n^rale. Pp. xv+ 

 619. Tome ii. : Botanique Sp^ciale. Pp. xx + 743. 

 (Paris : Masson et Cie, 1918.) 14 francs. 



The New Physiology and Other Addresses. By 

 Dr. J. S. Haldane. Pp. vii+156. (London: Charles 

 Griffin and Co., Ltd., 19 19.) 8s. 6d. net. 



Conscience and Fanaticism : An Essay on Moral 

 Values. By George Pitt-Rivers. Pp. xvi+112. 

 (London : William Heinemann, 19 19.) 6s. net. 



The Elementary Nervous System. By Prof. G. H. 

 -Parker. (Monographs on Experimental Biology.) 

 Pp. 229. (Philadelphia and London : J. B. Lippin- 

 cott Co., 1919.) 2.50 dollars net. 



Formulaire de I'Electricien et du M^canicien. Par 

 Hospitaller et Roux. Vingt-neuvifeme Mition par 

 Caston Roux. Pp. ii+1485. (Paris: Masson et Cie, 

 1919.) 20 francs. 



: My House in the World : Essays in Quiet. By 

 James Guthrie. Pp. 160, with ten drawings by the 

 author. (London : Heath, Cranton, Ltd., n.d.) 5s. 

 net. 



lAnnuaire de I'Observatoire Royal de Belgique. 

 Public sous la direction de G. Lecointe. Pp. X+532 + 

 plates V. (Bruxelles : Hayez, Imprimeur de I'Ob- 

 servatoire Royal de Belgique, 1915.) 



Annuaire de I'Observatoire Royal de Belgique. 

 Public sous la direction de Paul Stroobant. Pp. 

 viii + 209. (Bruxelles: Hayez, Imprimeur de I'Ob- 

 servatoire Royal de Belgique, 19 19.) 



Education : Secondary and University. A Report of 

 Conferences between the Council for Humanistic 

 Studies and the Conjoint Board of Scientific Societies. 

 Bv iSir Frederic G. Kenyon. Pp. 47. (London : John 

 Murray, 1919.) is. net. 



A System_ of Physical Chemistry. By Prof. W. C. 

 McC. Lewis. Second edition. In three volumes. 

 Vol. iii. : Quantum Theory. With two appendices by 

 James^ Rice. (Text-books of Physical Chemistry.) 

 Pp. viii+209. (London : Longmans, Green, and Co., 

 1919.) 7s. 6d. net. 



A Handbook of Colloid Chemistry. The Recogni- 

 tion of Colloids, the Theory of Colloids, and their 

 General PhysIco-Chemical Properties. By Dr. Wolf- 

 gang Ostwald. Second English edition. Translated 

 from the third German edition by Prof. Martin H. 

 Fischer. With numerous notes added bv Emil 

 Hatschek. Pp. xvi+284. (London : J. and A. 

 Churchill, loiq.) 15s. net. 



Molecular Physics. By Dr. J. A. Crowther. Second 

 edition. (Text-books of Chemical Research and En- 

 gineering.) Pp. viii4-i90. (London: J. and A. 

 Churchill, 19 19.) 6s. net. 



Golden Davs from the Fishing-Log of a Painter in 

 Brittany. By Romilly Fedden. Pp. xviii + 233. 

 (London: A. and C. Black, Ltd., 1919.) 7s. 6d. 

 net. 



Sir William Turner, K.C.B., F.R.S., Professor of 

 Anatomy and Principal and Vice-Chancellor of the 

 University of Edinburgh. A Chapter in Medical His- 

 tory. By> Dr. A. Logan Turner. Pp. xv -1-514. 

 (Edinburgh and London : William Blackwood and 

 Sons, 1919.) i8s. net. 



NO. 2578, VOL. 103] 



DIARY OF SOCIETIES. 



THURSDAY, March 27. 

 Royal Institution, at 3.— Prof. C. H. Lees : Fire Cracks and the Forces 



Producing Them. 

 ROVAL SociKTV, at 4.30.— H. L. Hawkins : The Morphology and Evolution 



of the Ambulacrum in the Echinoidea.— Dr. R. McCarri.son : The Genesis 



of CEdema in Beriberi. 

 Chemical Society, at 4.30. — Annual General Meeting. 

 Institution ok Electkicai. Engineers, at 6. — The late H. R. Constan- 



tine : The Co-ordination of Research in Works and Laboratories. 

 FRIDAY, March 2B. 

 Physical Society, at 5.— Discussion on Metrology in the Industries. 



Introduced by Sir R. T. Glazebrook. 

 Institution ok Electrical Engineers (Students' Meeting), at 7.— 



Dr. J. F. Crowley : The Organisation of Technical Engineers. 

 SATURDAY, March 25^ 

 Royal Institution, at 3. — Sir J. J. Thomson : hjpectrum Analysis and its 



Application to Atomic Structure. 



MONDAY, March 31. 

 Royal Society of Arts, at 4.30.— Prof. H. E. Armstrong: Problems of 



Food and their Connection with our Economic Policy. 

 TUESDAY, April i. 

 Royal Institution, at 3.— Prof. A. Keith : British Ethnology— The 



People of Scotland. 



WEDNESDAY, April 2. 

 Royal Society of Arts, at 4.30. — W. N. Boase : The Cultivation and 



Preparation of Flax, and the Linen Industry. 



THURSDAY, April 3. 

 Royal Institution, at 3. — Prof. A. Findlay: Colloidal Matter and its 



Properties. 

 L1NNF.AN Society, at 5. — W. B. Brierley : An Albino Mutant of Botrytis 



cinerea. — Dr. J. D. F. Gilchrist: I he Post-Puerulus Stage of Jasus 



/a/attiiu. — Montagu Drummond : The Ecology of a Small Area in 



Palestine. 

 Child-Study Society, at 6.— Dr. E. Pritchard : Home 7/. Institutional 



Training of Young Children. 

 Institution of Electrical Engineers, at 6. — Lt.-Col. A. G. T. 



Cusins : The Development of Army Wireless during the War. 

 Chemical Society, at 8. 



SATURDAY, April 5. 

 Roval Institution, at 3.— Sir J. J. Thomson : Spectrum Analysis and its 

 Application to Atomic Structure. 



CONTENTS. PAGE 



.Translated Sense and Senses. By Prof. J. S. 



Macdonald, F.R.S 61 



South African Grasslands 62 



Colloquial Chemistry 62 



Our Bookshelf 63 



Letters to the Editor:— 



Globular Clusters, Cepheid Variables, and Radiation. 



—J. H. Jeans, F.R.S. ; Dr. John W. Evans . 64 

 Scientific Research at St. Andrews Uitiversity. — Prof . 



W. C. Mcintosh, F.R.S 64 



Maceration by Tryptic Digestion. — Kathleen F. 



Lander . . 64 



Optical Glass. {Illustrated.) 65 



Sulphuric Acid after the War 67 



Notes 69 



Our Astronomical Column : — 



Venus and Jupiter 73 



Comets of the Jovian Family 73 



Star Clusters 73 



Weather Influences on the War. By C. H 73 



The United States National Museum 74 



The Problem of Radio-active Lead. I. By Prof. 



Theodore W. Richards • . . 74 



University and Educational Intelligence ... 78 



Societies and Academies 78 



Books Received .... 79 



Diary of Societies 80 



ST. 



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