192 



NATURE 



[April 7, 192 1 



Joseph Glanvill and Psychical Research in the 

 Seventeenth Century. By H. Stanley Redgrove and 

 I. M. L. Redgrove'. Pp. 94, (London: W. Rider 

 and Son, Ltd.) 25. 6d, net. 



Report of the Ninth Annual Conference of Educa- 

 tional Associations held at the University College, 

 London, 1921. Pp. viii+470. (London : Conference 

 Committee, 9 Brunswick Square, W.C.i.) 55. 



The Electro-Deposition of Copper and its Indus- 

 trial Applications. By Claude W. Denny. (Pitman's 

 Technical Primers.) Pp. xii+io8. (London: Sir 

 L Pitman and Sons, Ltd.) 2s. 6d. net. 



Diary of Societies. 



THURSDAY, Apeil 7. 

 EoTAL IxsTiTiTio-v OF Gkeat Bbitain, at 3.— C. T. R. Wilson : 



Thunderstorms (Tyndali Lectures). 

 Lix.vEAX Society, at 5.— Reginald A. Malby : A Miniature Alpine 



Garden from January to December.— H. W. Monckton : Exhibition 



of Various Forms of Taraxacum erythrospermum, Andrz. 

 Child-Studt Society (at Royal Sanitary Institute), at 6.— M. 



Dainow : Original Research in Vocational Tests. 

 Institition or Electrical Engineees (at Institution of Civil 



Engineers), at 6.— K. Baumann : Some Recent Developments In 



Steam Turbine Practice. 

 Chemical Society (at Institution of Mechanical Engineers), at 8.— 



Dr. F. W. Aston : Mass Spectra and Atomic Weights. 



FRIDAY, Apeil 8. 



Royal Astronomical Society, at 5.— E. A. Milne : Radiative Equili- 

 brium and Spectral Distribution.— E. A. Milne : Radiative Equili- 

 brium in the Outer Layers of a Star : The Temperature Distribu- 

 tion and the Law of Darkening.- Prof. H. H. Turner: Note on 

 Barnard's Observations of Nova Ophiuchi No. 2 (Hind, 1848) and 

 of Nova Persei No. 2 (Anderson, 1901).— Guido Horn d'Arturo : A 

 Spiral Nebula in the Northern Hemisphere of the Milky Way.— 

 Major W. J. S. Lockyer and D. L. Edwards : The Spectrum of 

 d) Cassiopeias in Relation to those of a Cygni and y Cygni.— 

 Rev. 'A. L. Cortie : The Ultra-violet Spectrum of Nova Aquilw 1918 

 June 10.— Sir W. H. M. Christie : Observations of the Moon, 

 .Saturn, etc., made at Prof. \\. H. Pickering's Observatory in 

 Jamaica. 



Physical Society of London (at Imperial College of Science) 

 at o.— Dr. W. J. H. Moll : A New Registering Microphotometer.— 

 Sir W ilham Bragg : The Examination of the Structure of Crvstals 

 in the Form of Powder by Means of the lonisation Spectrometer.— 

 H. Parry : A Balance Method of Using the Quadrant Electrometer 

 tor the Measurement of Power. ' 



Royal Society of Medicine (Clinical Section), at 5.30.— Dr. Ivor 

 Davies: Hair Ball or Hair Cast of the Stomach and Gastro- 

 intestinal Tract. A Report of Two Cases with Specimens, and 

 an AT)stract of 108 Cases from the Literature.— Dr. M. Cassidv : 

 Report re Case of Neoplasm of Lung. 



BOYAL Institvtion OF Gufat Britain, at 9.— Dr. R. H. A. Plimmer • 

 Quality of Protein in Nutrition. 



SATURDAY, April 9. 

 Royal Institution of Great Britain, at 3.— Dr. H. H. Dale • 



Poisons and Antidotes. 



MONDAY, April 11. 



Royal Geographical Society (at Lowther Lodge), at 5.— E 

 Heawood : The World'Map before and after Magellan's Voyage 



Institution of Electrical Engineers (Informal Meeting) (at Char- 

 tered Institute of Patent Agents), at 7.— P. Creedy and Others- 

 Some Characteristics and Applications of Multispeed A.C. Motors 



Institvtion of Mechanical Engineers (Graduates' Meeting), at 7.— 

 L. H. Bedford : Electrolysis as Applied to Engineering'. 



SiHVEYOBs' Institution, at 8.— L. S. Wood: The Forestry Direc- 

 torate in France. 



B oval SOCIETY OF ARTS, at 8.— Dr. S. J. Lewis : Recent Applications 

 of the Spectroscope and the Spectrophotometer to Science and 

 Industry. 



TUESDAY. April 12. 



Royal Institution of Great Britain, at 3.— Prof . R. A. Sampson • 

 The Measurement of Starlight. 



Royal College of Physicians of London, at 5. Dr. T. Lewis • 



Observations upon the Nature of Auricular Flutter and Fibrilla- 

 tion (Oliver-Sharpey Lecture). 



Royal Photographic Society of Great Britain, at 7.— H. M. 

 Lomas : Problems of Kinematography.— R. J. Trump: A Shutter- 

 less Continuous Peed Kinematograph. 



Quekett :\Iicroscopical Club, at 7.30. 



BoYAL Aeronautical Society (at Royal Society of Arts), at 8.— 

 -Maior G. I. Taylor : Annual Wilbur Wright Lecture. 



Royal Anthropological In.stttute, at 8.15.— L. H. Dudlev Buxton : 

 Ihe Ancient and :\roflern Inhabitants of Malta. 



WEDNESDAY. April 13. 

 Royal Society of Medicine, at 5.— Sir Thomas Horder, Mr. Clayton- 

 .Greene. Sir Berkeley jVloynihan, Dr. D. Pennington, A. Evans, 

 and Others : The Problems For and Against Team Work in this 

 Country. 



NO. 2684, VOL. 107] 



Royal Socieiy of Medicine (Proctology Sub-section), at 5. — Mr. 

 Lockhart-ilummery, Sir Charles Gordon- Watson, and Others : 

 Pruritus Ani. 



Royal Society of Arts, at 8. — Prof. H. E. Armstrong : Low Tem- 

 perature Carbonisation and Smokeless Fuel. 



Institution of Automobile Engineers (at Institution of Mechanical 

 Engineers), at 8. — G. Watson : A Suggested Programme for 

 Automobile Research. 



THURSDAY, Apeil 14. 



Royal Institution of Great Beitain, at 3 — C. T. R. Wilson : 

 Thunderstorms (Tyndali Lectures). 



Royal Society, at 4.30. — Probable Papers.— 'Proi. K. Onnes, Sir 

 Robert Hadfield, and Dr. H. R. Woltjer : The Influence of Low 

 Temperatures on the Magnetic Properties of Alloys of Iron with 

 Nickel and Manganese. — C. N. Hinshelwood and E. J. Bowen : The 

 Influence of Physical Conditions on the Velocity of Decomposition 

 of Certain Crystalline Solids. — N. K. Adam : The Properties and 

 Molecular Structure of Thin Films of Palmitic Acid on Water. 

 Part I. — E. P. Metcalfe and B. Venkatesachar : The Absorption 

 of Light by Electrically Luminescent Mercury Vapour. 



Rotal College ■ of Physicians of London, at 5. — Dr. T. Lewis : 

 Observations upon the Nature of Auricular Flutter and Fibrilla- 

 tion (Oliver-Sharpey Lecture). 



Institution of Electrical Engineers (at Institution of Civil 

 Engineers), at 6. — E. A. Watson : Magnetos for Ignition Purposes 

 in Internal Combustion Engines. 



Oil and Colour Chemists' Association (at 2 Furnival Street), at 

 7.30.— F. H. Barry : Indian Products of Interest to the Oil and 

 Colour Chemist. 



Optical Society (at Imperial College of Science), at 7.30.— F. 

 Twyman : An Interferometer for the Testing of Camera Lenses. — 

 W. " Shackleton : The Testing of Heliograph Mirrors 



Rontgen Society (at University College), at 8.15. 



FRIDAY, April 15. 



Rotal College of Surgeons of England, at 5. — Prof. A. Keith : 



Demonstration of the Contents of the Museum. 



SATURDAY, April 16. 



Royal Institution of Great Britain, at 3. — Dr. H. H. Dale : 



Poisons and Antidotes. 



CONTENTS. . PAGE 

 Standardisation of Vaccines, Toxins, and Anti- 

 toxins 161 



British Dyestuffs Corporation 162 



Alcohology 163 



Some Aspects of Psychology. By C. LI. M. . . . . 164 



Physiology for Students 166 



Our Bookshelf 167 



Letters to the Editor: — 



Light and Electrons — Sir Oliver Lodge, F.R.S. . 169 

 Relativity and the Velocity of Light.— J. H. Jeans, 



Sec. R.S . . . ... 169 



A Difficulty in Einstein'.s Gravitational Theory. — 

 George W. Walker, F.R.S. ; Prof, A. S. 



Eddington, F.R.S 169 



Atomic Structure. — Dr. Norman R, Campbell . 170 

 British Plants Available as a Source of Industrial 



Alcohol. — Prof. M. C. Potter 170 



Relativity, Space, and Ultimate Reality. — L. C, W. 



Bonacina . ... 171 

 Molecular Structure and Etiergy. — Prof. J. R. 



Partington . 172 

 Oceanographic Research.— Prof. W. A. Herdman, 



F.R.S. .... .... 172 



Why do Worms Die ?^Rev. Hilderic Friend ... 172 

 Stellar Magnitudes and their Determination. IL — 

 Apparent Magnitudes: {6) Photographic, {Ilhcs- 



trated.) By H. Spencer Jones 173 



Ocean Tides. By Prof. J. Proudman 176 



Obituary :■ — 



John Burroughs 177 



Notes . 178 



Our Astronomical Column :— 



Recent Brilliant Fireballs . 182 



Another Investigation of the Einstein Spectral Shift . 182 



Nova Aquilas III 182 



The Galvanometric Measurement of Human 

 Emotion. {Illustrated.) By Dr. A. D. Waller, 



F.R.S 183 



The Modern Londoner and Long Barrow Man . , 186 



Pendulum Operations in India and Burma .... 187 



University and Educational Intelligence , . . 187 



Calendar of Scientific Pioneers 189 



Societies and Academies 189 



Books Received 191 



Diary of Societies . . 192 



