540 



NATURE 



[June 24, 1920 



glaucus requires a strength of 4 per cent, for destruc- 

 tion. Micro-organisms offer very great resistance to 

 the action of hydrocyanic acid. The conditions under 

 which seeds can be exposed to hydrocyanic acid vapour 

 without damage have been worked out, and experi- 

 ments cited showing- how this method- can be used for 

 the practical disinfection of seeds affected with para- 

 sites. — A. Krempf : The blastodermic origin of the 

 enteroids and of the enteroido-pharyngeal complex in 

 the Anthozoa.— W. Kopaczewski, A. H. Roffo, and 

 Mme. H. L. Roffo : Anaesthesia and anaphylaxy. The 

 authors have found that anaesthetics and analgesics 

 possess the well-marked property of diminishing the 

 surface tension of serum. On the other hand, it has 

 been proved that all the substances used for the pre- 

 vention of anaphylactic phenomena, such as lecithin, 

 the alkalis, and' soaps, also have the property of 

 lowering the surface tension. Experiments are given 

 on the suppression of anaphylactic shock by anaes-' 

 thetics. The results obtained confirm the view that 

 it is not the nervous system which is mainlv affected 

 by the anaphylactic shock, but a reaction of colloidal 

 flocculation leading to asphvxia from the obstruction 

 of the capillary networks.— A. G. Pellissier ; Modifica- 

 tions and lesions of the pulmonary epithelial cells due 

 to suffocating gases. — G. Marlnescu : The modifications 

 of the oxvdases during the evolution of the neurone .^ — 

 R. Cambier : The nurificntion of sewag-e effluents by 

 activated sludge.— H. Vallee and L. Bazy : Bacterio- 

 theraoy bv microbial extracts. — A. Mayer, H. Magne, 

 and I^. Plantefol : The mechanism of death in the case 

 of acute pulmonary cedema caused by the inspiration 

 of noxious vapours or gases. 



Books Received. 



Forest Products. By Prof. N. C. Brown. Pp. xix + 

 471. (New York: J. Wiley and Sons, Inc.; London: 

 Chapman and Hall, Ltd.) 21s. net. 



Practical Geometry, pp. xv+256; Theoretical Geo- 

 metry, pp. xiv+104. By C. Godfrey and A. W. 

 Siddons. (London : Cambridge University Press.) 

 Complete, ys. net. 



A Primer of Trigonometry for Engineers. By 

 W. G. Dunkley. Pp. viii+171 (with Answers). 

 (London : Sir Isaac Pitman and Sons, Ltd.) 5s. net. 



Pyrometry. By C. R. Darling. Second edition. 

 Pp. xii + 224. (London: E. and F. N. Spon, Ltd.) 

 I05. 6d. net. 



The Chemist's Year Book, 1920. Edited by F. W. 

 Atack, assisted by L. Whinyates. 2 vols. Vol. i., 

 pp. vi+422; vol. ii., pp. vii-viii + 423-1 136. {London 

 and Manchester: Sherratt and Hughes.) 



Phosphore, Arsenic, Antimoine. By Dr. A. Boutaric 

 and A. Raynaud. Pp. iii+417. (Paris : O. Doin.) 

 9.50 francs. 



Traits de la Lumiere. By C. Huyghens. Pp. x + 

 155. (Paris : Gauthier-Villars et Cie.) 3.60 francs. 



Food Inspection and Analysis. By A. E. Leach. 

 Fourth edition. Pp. xix+1090+xli plates. (New 

 York: J. Wiley and Sons, Inc.; London: Chapman 

 ■and Hall, Ltd.) 455. net. 



Vertebrate Zoology. By Prof. H. H. Newman. 

 Pp. xiii + 432. (New York: The Macmillaa Co.; 

 London : Macmillan and Co., Ltd.) i6s. net. 



A Second Book of School Celebrations. By Dr. 



F. H. Havward. Pp. 133. (London : P. S. King- and 

 Sons, Ltd.) 55. net. 



Stories for the Nature Hour. Compiled bv A. M. 

 Skinner and E. L. Skinner. Pp. 253. (London: 



G. G. Harrap and Co., Ltd.) 5s. net. 

 Surveying. By W. N. Thomas. Pp. viii + 536 (vyith 



Answers). (London: E. Arnold.) 315. 6d, net. 



NO. 2643, VOL. 1051 



Diary of Societies. 



THURSDAY, Junk 24. 



RovAL Society of Medicine (Laryngology Section), Annual Summer 

 ^Congress, at 2.30. — Papers on Cancer of the Throat, with Discussion. 



RovAL Society, at 4.30. — Sir Ray L,ankester : Some Rostro-carinate 

 Flint Implements and Allied Forms.— Lord Rayleigh : A Re- 

 examination of the Light scattered by Gases in respect of Polari- 

 sation. L Experiments on the Common Gases.— A. Mallock : 

 Note on the Influence of Temperature on the Rigidity of Metals. — 

 Drs. E. F. Armstrong and T. P. Hilditch : A Study of Catalytic Actions 

 at Solid Surfaces. V. The Rate of Change conditioned by a Nickel 

 Catalyst and its Bearing on the Law of Mass Action. — Dr. H. Jeffreys : 

 Tidal Friction in Shallow Seas.— Other Papers. 



LiNNEAN Society of London, at 5.— Dr. C. J. F. Skottsberg : Recent 

 Researches on the Ant.-irctic Flora.— Dr. R. J. 1 illyard : The Cawthorn 

 Institute, New Zealand, and its P.iological Function. 



Oil and Colour Chemists' Association (at Food Reform Club, 2, 

 Furnival Street), at 7.30. — A. E. Bawtree : (i) A Hydrometer for Accurate 

 Deterniinations of Pastes and Viscous Materials ; (2) A Viscometer which 

 Combines Increased Efficiency with the Power of Measuring " Stickiness " 

 Independently of Viscosity. 



Society of Antiquaries, at 8.30. 



FRIDAY, June 25. 



Royai, Society of Medicine ( Laryngology Section), Annual Summer 

 Congress, at 10 a.m. — Papers on Cancer of the Throat, with Discussion. 



Physical Society of London, at 5.— Dr. J. H. Vincent: The Origin of 

 the Elements.— W. H. Wilson and Miss T. D. Epps : The Construction 

 of Thermo-couples by Electro-deposition.— J. Guild: The tJse of 

 Vacuum Arcs for Interferometry. — S. Butterworth : The Maintenance of 

 a Vibrating System by Means of a Triode Valve. 



West London Medico-Chirurgical Society (at Kensington Town 



Hall), at 8.15. — Prof. C. S. Sherrington : Posture (Cavendish Lecture). 



TUESDAY, JuNF 29. 



Royal Horticultural Society, at 3. — H. R. Darlington ; Garden 

 Roses. 



Royal Anthropological Institute, at 3-7. — Sir C. Hercules^ Read, 

 T. Allworthy, V. B. Crowther-Benyon, S. Fentan, G. W. Willis, and 

 others: Exhibition of Bronze Age Implements. 



WEDNESDA )' June :,o. 



Royal Society of Arts, at 4. — Annual General Meeting. 



Institution of Electrical Engineers (at Institution of Mechanical 

 Engineers), at 6. — Sir Philip Dawson : Electric Railway Contact 

 Systems. 



CONTENTS. PAGE 



University and Higher Technical Education . .. . 509 



Mathematics of Elasticity. By L. N. G. F 511 



Behaviourism. By Prof. H. Wildon Carr 512 



The World's Supply of Animal Foods^ffs .... 513 



Life and Lore of Birds 514 



Our Bookshelf , . . . . ... 5x5 



Letters to the Editor:— 



The Separation of the Isotopes of Chlorine. — Prof. 



Frederick Soddy, F.R.S. .516 



A Possible Cause for the Diamagnetism of Bohr's 



Paramagnetic Hydrogen Atom.— J. R. Ashworth 516 

 A Stalked Parapineal Vesicle in the Ostrich. {Illus- 

 trated.)— 'Proi. J, E. Duerden 516 



The Alligator Pear.— Dr. Michael Grabham . . . 517 



Eye-Colour in Bees.— Prof. T. D. A. Cockerell . . 518 

 British and Foreign Scientific Apparatus.— F. W. 



Watson Baker ". 5x8 



Applied Science and Industrial Research. — J. W. 



Williamson „ 5x8 



Wireless Telephony. {With Diagrams.) By Prof. 



W. H. Eccles . . . 5x9 



The Meteorology of the Temperate Zone and the 

 General Atmospheric Circulation. (Illustrated.) 



By Prof. V. Bjerknes 522 ' 



The Cardiff Meeting of the British Association . . 524 

 Obituary : — 



Prof. J. R. Rydberg, For.Mem.R.S 525 



Notes 526 



Our Astronomical Column : — 



Mercury an Evening Star 529 



The Zeeman Effect in Furnace Spectra 529 



The Lunar Parallax and Related Constants 529 



The Centenary of Sir Joseph Banks, Bart 530 



South-Eastern Union of Scientific Societies . . . 530 



Genetic Segregation. By W. Bateson, F.R.S. . . 531 



Colour Index of the British Isles 531 



Army Hygiene and its Lessons. By Lt.-Gen. Sir 



Thomas Goodwin, K.C.B. . . . 532 



University and Educational Intelligence 537 



Societies and Academies 537 



Books Received ......... 54° 



Diary of Societies ^ .... 540 



