March 3, 192 1] 



NATURE 



31 



Weiss. — A. Lienard : . Electromagnetic energy and 

 thermodynamic potential of a system of currents. — A. 

 Portevin and J. l)urand : Anomaly of expansion of the 

 gold-copper alloys. — L. Forsen : The constitution of 

 the derivatives of molybdic acid. — J. Martinet and 

 O. Dornier : Isatin 5-sulphonic acid. Isatin has not 

 hitherto been directly sulphonated. Details are given 

 for the preparation of isatin 5-sulphonic acid from 

 isatin and fuming sulphuric acid, and some of its 

 salts are described. — H. Bouygues : Considerations on 

 the endoderm. — M. and Mme. G. Villedieu : The non- 

 toxicity of copper for mildew. The results of experi- 

 ments on Phytaphthora infestans (the mildew of 

 potato), controverting the usually accepted view that 

 it is the copper in anticryptogamic mixtures which is 

 efficacious in destroying mildew. — W. Kopaczewski : 

 The role of surface tension in the phenomena of 

 shock. The surface tension of serum is reduced by 

 the addition of a solution of sodium hyposulphite. 

 The author attributes the suppression of the ana- 

 phylactic shock by sodium hyposulphite solutions to 

 this change in surface tension, and not to the effect 

 of this salt in dispersing flocculated serum. — A. Trillat : 

 The influence of the state of division of droplets con- 

 taining bacteria on the infection of culture media. — 

 MM. Desgrez, Guillemard, and Labat : The use of the 

 alkaline polysulphides for the neutralisation of cer- 

 tain toxic gases. Spraying- with a sodium polysul- 

 phide soap solution, originallv suggested for the re- 

 moval of chloropicrin vapour from air, has been found 

 to be also efficacious in removing other toxic gases. 

 Figures are given for the amounts required to remove 

 chlorine, phosgene, acrolein, bromoacetone, and other 

 noxious vapours. 



Books Received. 



The Government of the Philippine Islands. Philip- 

 pine Census, a.d. 1918. Manila : The Climate and 

 Weather of the Philippines, 1903 to 1918. By the 

 Rev. J. Coronas. Pp. 195. (Manila : Bureau of 

 Printing.) 



Whar to Read on Social and Economic Subjects. 

 A Select Bibliography Compiled by the Fabian Society. 

 Sixth edition. Pp. xii-f-80. (London : The Fabian 

 Society ; G. Allen and Unwin, Ltd.) 2s. net. 



The Boy in Industry and Leisure. By the Rev. 

 R. R. Hyde. (Social Service Library.) Pp. xxviii+ 

 281. (London : G. Bell and Sons, Ltd.) 6s. net. 



Small Single Phase Transformers. By E. T. 

 Painton. Pp. x+95. (London : Sir I. Pitman and 

 Sons, Ltd.) 2S. 6d. net. 



Elementary Principles of Continuous-Current Arma- 

 ture Winding. By F. M. Denton. Pp. x+102. 

 (London : Sir I. Pitman and Sons, Ltd.) 2s. 6d. net. 



A Guide to the Preparation of a Note-Book of 

 Biology. By E. W. Shann. Pp. 48. (London : G. 

 Bell and Sons, Ltd.) 25. 6d. net. 



Mitteilungen der Naturforschenden Gesellschaft in 

 Bern.aus dem Jahre 1919. Pp. lxxv+23i-i-v Tafel. 

 (Bern : K. J. Wyss Erben.) 



The Breeding and Feeding of Farm Stock. Bv 

 J. Wilson. Pp. vii+152. (London: Methuen and 

 Co., Ltd.) 6s. net. 



A Book of Butter : A Text on the Nature, 

 Manufacture, and Marketing of the Product. Bv 

 Prof. E. S. Guthrie. Pp. xv+270. (New York : The 

 Macmillan Co.; London : Macmillan and Co., Ltd.) 

 12S. net. 



Report of the Indian Association for the Cultiva- 

 tion of Science and Proceedings of the Science Con- 

 vention for the Year 1918." Pp. iii-|-i99-Fxxxi+ 

 plates. (Calcutta.) 



NO. 2679, VOL. 107] 



Economic Mineralogy : A Practical Guide to the 

 Study of Useful Minerals. By T. Crook. Pp. xi+ 

 492. (London ; Longmans, Green and Co.) 25s. 

 net. 



Insect Life. By C. A. Ealand. Pp. xii + 340+ 

 Ixxiv plates. (London : A. and C. Black, Ltd.) 3oi-. 

 net. 



In Farthest Burma : The Record of an Arduous 

 Journey of Exploration and Research through the 

 Unknown Frontier Territory of Burma and Tibet. 

 By Capt. F. K. Ward. Pp" 311. (London: Seeley, 

 Service and Co., Ltd.) 25s. net. 



The Subject Index to Periodicals, 1917-19. B-E : 

 Historical, Political, and Economic Sciences. Pp. 

 248. (London : The Library Association.) 215. net. 



Transactions of the Norfolk and Norwich 

 Naturalists' Society. Presented to Members for 

 1919-20. Vol. xi., part i, December. Pp. xiii+ioi. 

 (Norwich.) 7s. 6d. 



Annuaire Astronomique et M^t^orologique pour 

 1921. 57 Annee. By C. Flammarion. Pp. 251. 

 (Paris : E. Flammarion.) 8 francs. 



Department of Applied Statistics (Computing Sec- 

 tion), University of London, University College. 

 Tracts for Computers. Edited by Karl Pearson. 

 No. iv. : Tables of the Logarithms of the Complete 



-function to Twelve Figures. Originally computed 

 by A. M. Legendre. Pp. 4+10. (London: Cam- 

 bridge University Press.) 35. gd. net. 



The National Physical Laboratory. Collected 

 Researches. Vol. xv., 1920. Pp. iv+329+plates. 

 (London : H.M. Stationery Office.) 205. net. 



Diary of Societies. 



THURSDAY, March 3. 



RoiAL Institution of Geeat Beitain, at 3.— F. Balfour Browne : 

 Mason Wasps. 



Royal Societx, at 4.30. — Discussion on Isotopes to be opened by 

 Sir J. J. Thomson, followed probably by Dr. P. W. Aston, Prof. 

 V. Soddy, Prof. T. R. Merton, and Prof. F. A. Lindemann. 



Royal Aeeonautical Society (at Royal Society of Arts), at 5. — 

 J. W. W. Dyer : Airship Fabrics. — Major T. Orde Lees : Para- 

 chutes. 



LiNNEAN Society, at 5. — R. T. Giinther : A Manuscript of Matthias 

 de Lobel, from the Library of Magdalen College, Oxford. — Dr. 

 B. Daydon Jackson : Naturalists and their Indebtedness to the 

 National Trust. 



Royal College of Physicians of London, at 5.— Dr. Q. Graham : 

 Glyosemia and Glycosuria (Goulstonian Lecture). 



Child-Study Society (at Royal Sanitary Institute), at 6. — Miss 

 M. 0. Buysman : The Value of the Drama in the Training of 

 the Child's Emotions. 



Chemical Society, at 8.— C. K. Ingold and J. F. Thorpe : The 

 Chemistry of the Glutaoonic Acids. Part XII. The Simultaneous 

 Occurrence of 1:2- and of 1 : 3-Addition to Glutaoonic Ester. A 

 Study in Mobile Equilibrium involving the tJtilisation of the Labile 

 Ester in the " Nascent " Condition. — E. 0. 0. Baly and W, P. 

 Barker : The Photochemical Reaction between Hydrogen and 

 Chlorine, and its Variation with the Intensity of the Light. — 

 J. Kenner and W. V. Stubbings : A Second Form of 6 : 6/-Dinitro- 

 diphenic Acid and its Conversion into New Cyclic Systems. — J. 

 Moir : The Calculation of the Colour of Monocyclic Coloured Sub- 

 stances. — N. V. Sidgwick and E. K. Ewbank : The Stability of 

 Tautomeric Formaldehydrazones. — F. W. Ataok and L. Whinyates : 

 The Structural Isomerism of Oximes. Part III. A Fourth Benzil- 

 dioxime. 



Royal Society or Medicine (Obstetrics and Gynsecology Section), 

 at 8. — Dr. G. Evans : A Study of the Condition of the Arteries in 

 a Uterus Removed 24 Days after Delivery. — Dr. A. Bourne : Puer- 

 peral Salpingo-peritonitis. 



FRIDAY, Mahch 4. 



Royal Society of Medicine (Laryngology Section), at 4. 



Royal Society of Aets (Indian Section), at 4.30. 



Royal Astronomical Society (Geophysical Discussion), at .■>. — 

 Problems of Seismology: opened by Prof. H. Lamb, followed 

 by Dr. G. W. Walker, R. D. Oldham, and J. J. Shaw. Chair- 

 man: Prof. H. H. Turner. 



Institution of Mechanical Engineers and the Society of Chemical 

 Industry (Joint Meeting), at 6. — P. Kestner : Degassing and Puri- 

 fication of Boiler Feed-Water. 



Institution or Electrical Engineers (Students' Meeting) (at 

 Faraday House), at 6.3Q.^-A. Rosen : Telephonic Trapsmission 

 through Submarine Cables. 



Junior Institution of EItgineers (at Caxton Hall), at 8. — W. ;'K. 

 Simmons: Manufacture of Gun-cotton. ^o.'s . s 



