*
PROCEEDINGS
OF THE
ROYAL SOCIETY OP LONDON
S e r ie s A
CONTAINING PAPERS OF A MATHEMATICAL AND PHYSICAL CHARACTER.
YOL. CYI.
LONDON:
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D ecember, 1924. LONDON : HARRISON AND SONS, LTD., PRINTERS IN ORDINARY TO HIS MAJESTY,
ST. m a r t in ’s LANE. CONTENTS
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SERIES A. VOL. CVI.
Minutes of Meetings, June 5, 19, 26 ; November 6, 13, 20, 1924.
No. A 735.—July 1, 1924. PAGE The Non-Luminous Oxidation of Phosphorus in an Oxygen Atmosphere. By Lord Rayleigh, F.R.S...... * On the Absorption and Scattering of y-Rays. By N. Ahmad, M.Sc., Peteiliouse, Cambridge, and E. C. Stoner, B.A., Emmanuel College, Cambridge. Com municated by Prof. Sir E. Rutherford, F.R.S...... The 27-day Period (Interval) in Terrestrial Magnetic Disturbance. By the Rev. A. L. Cortie, S.J., D.Sc., F.Inst.P., Director, Stonyhurst College Observatory. Communicated by Dr. C. Chree, F.R.S. (Plate 1) ...... 19 An Automatic and Continuous Recording Balance. .(The Od6n-Keen Balance.) By John R. H. Coutts, Edward M. Crowther, Bernard A. Keen, and Sven Oden. Communicated by Sir John Russell, F.R.S...... 33 Absorption of Lithium Vapour. By Prof. A. L. Narayan, M.A., D.Sc., and D. Gunnaiya, M.A. Communicated by Lord Rayleigh, F.R.S. (Plate 2) ...... 51 The Use of the Coherer to Investigate Adsorption Films. By William George Palmer, Fellow of St. John’s College, Cambridge. Communicated by Sir William Pope, F.R.S...... 55 The Band Spectrum of Hydrogen. By H. Stanley Allen, M.A., D.Sc., Professor of Natural Philosophy in the University of St. Andrews. Communicated by Prof. O. W. Richardson, F.R.S...... 69 An Experimental Study of the Viscous Properties of Water Vapour. By C. J. Smith, M.Sc., A.R.C.S., D.I.C., Demonstrator, Physics Department, Imperial College of Science and Technology. Communicated by Prof. H. L. Callendar, F.R.S...... 83 The Destruction of Rennin by Agitation : A Case of Catalysis at an Air-Liquid Interface. By Eric Keightley Rideal and Charles George Lewis Wolf. Com municated by Prof. Sir W. J. Pope, F.R.S...... 97
No. A 736.—August 1, 1924. The Light of the Night Sky : Its Intensity Variations when Analysed by Colour Filters. By Lord Rayleigh, F.R.S...... 117 IV
PAGE On the Luminescence of Nitrogen, Argon, and other Condensed Gases at very Low Temperatures. By J. C. McLennan, F.RS., Professor of Physics, and G. M. Shrum, Ph.D., University of Toronto. (Plate 3) ...... 138 The Nature and Artificial Production of Consonant Sounds. By Sir Bichard A. S> Paget, Bt. Communicated by Sir Wm. Bragg, F.R.S...... 150
On the Band-Spectra of Silicon Oxide and Chloride, and Chlorides of Carbon, Boron, and Aluminium. By W. Jevons, M.Sc., A.R.C.Sc., F.Inst.P., Lecturer in Physics, Artillery College, Woolwich. Communicated by Prof. H. C. Plummer, F.R.S. (Plate 4) ...... — ...... 174 The Effect of Argon on Certain Spectra. By R. C. Johnson, B.A., B.Sc., Lecturer in Physics, and W. H. B. Cameron, B.Sc., Research Student, Queen’s University, Belfast. Communicated by T. R. Merton, F.R.S. (Plates 5 and 6) ...... 195 A Discontinuity in the Dehydration of Certain Salt Hydrates. By Edward Mortimer Crowther and John Reginald Horder Coutts. Communicated by Sir John Russell, F.R.S...... 215
No. A 737.—September 1, 1924. On the Drift of Spinning Projectiles. By J. W. Campbell, Ph.D., Assoc. Professor of Mathematics, University of Alberta, Canada. Communicated by Dr. J. S. Plaskett, F.R.S...... 222 The Indirect Measurement of the Aqueous Vapour-Pressure of Capillary Systems by the Freezing-point Depression of Benzene. By Edward Mortimer Crowther and Amar Nath Puri, Soil Physics Department, Rothamsted Experimental Station. Communicated by Sir John Russell, F.R.S...... 232 Activity Measurement by the Partition Method.—I. By Bernard Cavanagh, B.A., Balliol College, Oxford. Communicated by Prof. J. W. Nicholson, F.R.S...... 243 The Catalytic Action of Copper. Part IV.—The Periodic Variation of the Activity with Temperature of Reduction. By W. G. Palmer, Fellow of St. John’s College, Cambridge, and F. H. Constable, Strathcona Research Student of St. John’s College, Cambridge. Communicated by Sir William Pope, F.R.S. ... 250 The Elastic Stability of an Annular Plate. By W. R. Dean, B.A., Fellow of Trinity College, Cambridge. Communicated by Prof. G. I. Taylor, F.R.S. ... 268 The Homogeneous Thermal Decomposition of Nitrous Oxide. By C. N. Hinshelwood, Fellow of Trinity College, Oxford, and R E. Burk, Merton College, Oxford. Communicated by Prof. J. W. Nicholson, F.R S...... 284 I’he Kinetics of the Interaction of Nitrous Oxide and Hydrogen. By C. N. Hinshelwood, M.A., Fellow of Trinity College, Oxford. Communicated by Prof. J. W. Nicholson, F.R.S...... 292 Double Fourier Series of a Discontinuous Function. By E. C. Titchmarsh, lellow of Magdalen College, Oxford ; Senior Lecturer in Pure Mathematics m University College, London. Communicated by Prof. G. H. Hardy, F.R.S. 299 VT
PAGE The Cataphotesis of Gas Bubbles in Water. By Thomas Alty, M.Sc. (Liv.), Ph.D. (Cantab.). Communicated by Sir Joseph Thomson, O.M., F.K.S...... 315 Boundary Lubrication.—Further Consideration of the Influence of the Composition of the Solid Face. By Ida Doubleday. Communicated by W. B. Hardy, Sec.RS...... 341
No. A 738.—October 1, 1924. The Influence of Atomic Arrangement on Refractive Index. By W. L. Bragg, F.R.S., Langworthy Pi’ofessor of Physics, Manchester U niversity...... 346 A Theoretical Calculation of the Rhombohedral Angle of Crystals of the Calcite Type. By W. L. Bragg, F.R.S., Langworthy Professor of Physics, and S. Chapman, F.R.S., Beyer Professor of Mathematics, Manchester University ... 369 On Ultra-Violet Spectro-photometry. By T. R. Merton, F.R.S. (Plate 7) ...... 378 The Thermal Expansion of Crystals of Metallic Bismuth. By J. Keith Roberts, Ph.D. (Cantab.). Communicated by Sir Joseph Petavel, F.R.S...... 385 On the Fine Structure of the Band-Spectra of Sodium, Potassium, and Sodium- Potassium Vapoui’s. By H. Grayson Smith, M.A. Communicated by Prof. J. C. McLennan, F.R.S...... 400 Elastic Waves at the Surface of Separation of Two Solids. By R. Stoneley, M.A., University of Leeds. Communicated by Prof. H. F. Baker, F.R.S...... 416 Note on Vegard’s Theory of the Aurora. By R. d’E. Atkinson, B.A., Research Fellow, Hertford College, Oxford. Communicated by Prof. F. A. Lindemann, F.R.S...... 429 On the Determination of Molecular Fields.—I. From the Variation of the Viscosity of a Gas with Temperature. By J. E. Jones, D.Sc. (Manchester), 1851 Exhibition Senior Research Student, Trinity College, Cambridge. Com municated by Prof. S. Chapman, F.R.S...... 441 On the Determination of Molecular Fields.—II. From the Equation of State of a Gas. By J. E. Jones, D.Sc., 1851 Exhibition Senior Research Student, Trinity College, Cambridge. Communicated by Prof. S. Chapman, F.R.S...... 463
No. A 739.—November 1, 1924. The Lattice Points of a Circle. By J. E. Littlewood, F.R.S., and A. Walfisz. (With a Note by Prof. E. Landau) ...... 473 Studies of Co-ordination. Part I.—Absorption Spectra and Co-ordination of some Cupric Compounds. By Helen Somersby French and Thomas Martin Lowry, F R S ...... 489 Perturbations of Harmonic Tidal Constants. By A. T. Doodson, Tidal Institute, University of Liverpool. Communicated by H. Lamb, F.R.S...... 513 On the Possible Ellipticity of Saturn’s Ring. By G. R. Goldsbrough, D.Sc., Armstrong College, Newcastle-upon-Tyne. Communicated by Prof. T. H. Havelock, F.R.S...... 52g VI
PAGE Some Relations between the Optical Spectra of Different Atoms of the Same Electron Structure. I —Lithium-like and Sodium-like Atoms. By D. R. Hartree, St. John’s College, Cambridge. Communicated by Prof. Sir E. Rutherford, F.R.S...... 552 The Conditions for Statistical Equilibrium between Atoms, Electrons and Radiation. By P. A. M. Dirac, St. John’s College, Cambridge...... Com municated by Prof. Sir E. Rutherford, F.R.S. . 581 Absorption and Dispersion of Thallium Vapour. By Prof. A. L. Narayan, M.A., D.Sc., D. Gunnaiya, M.A., and K. R. Rao, M.A. Communicated by Lord Rayleigh, F.R.S. (Plate 8) ...... 596 a-Ray Tracks in a Strong Magnetic Field. By P. L. Kapitza, Ph.D. Com municated by Prof. Sir E. Rutherford, F.R.S. (Plate 9) ...... 602 On the Range of a-Partides in Rare Gases. By L. F. Bates, Ph.D., Trinity College, Cambridge. Communicated by Prof. Sir E. Rutherford, F.R.S...... 622 The /3-Ray Spectrum of Mesothorium 2. By D. H. Black, M.Sc. (N.Z.), Emmanuel College, Cambridge. Communicated by Prof. Sir E. Rutherford, F.R.S...... 632
No. A 740.—December 1, 1924. The Striking and Breaking Potentials for Electron Discharges in Hydrogen. By 0. W. Richardson, F.R.S., Yarrow Research Professor of the Royal Society, and T. Tanaka, Professor in the College of Niigata, Japan. (Plate 10) ...... 640 On a P, Q and R Combination in the Many-Lined Spectrum of Hydrogen. By O. W. Richardson, F.R.S., Yarrow Research Professor of the Royal Society, and T. Tanaka, Professor in the College of Niigata, Japan ...... 663 Controlled Orbital Transfers of Electrons in Optically Excited Mercury Atoms. By R. W. Wood, For. Mem.R.S. (Plate 11) ...... 679 The Molecular Structure of Thin Films.—Part VI. By N. K. Adam, M.A., Sorby Research Fellow of the Royal Society, and J. W. W. Dyer, M.Sc. Communicated by W. B. Hardy, Sec. R.S...... 694 On the Determination of Molecular Fields. III.—From Crystal Measurements and Kinetic Theory Data. By J. E. Jones, D.Sc., 1851 Exhibition Senior Research Student, Trinity College, Cambridge. Communicated by Prof. S. Chapman, F.R.S...... 709 The Photo-Elastic Constants of Glass as affected by High Temperatures and by Lapse of Time. By I . C. Harris, M.Sc., University College, London. Com municated by Prof. L. N. G. Filon, F.R.S...... 7...... 718 The Stokes-Einstein Law for Diffusion in Solution. By Christiana Cruickshank Miller, L.Sc., Ph.D., Carnegie Research Scholar, Chemistry Department, University of Edinburgh. Communicated by Sir James Walker, F.R.S...... 724 The Structure of Graphite. By J. T). Bernal, B.A. Communicated by Sir William Bragg, F.R.S...... ^ 749 Vll
PAGE The Constants of the Rydberg-Ritz Equation. By J. H. Jones, Ph.D., Assistant Lecturer in Physics, King’s College, London, and J. C. Boyce, M.A., Research Student, King’s College. Communicated by Prof. O. W. Richardson, F.R.S. ... 773
OBITUARY NOTICES OF FELLOWS DECEASED.
John Edward Stead (with portrait)...... i John Alexander McClelland (with portrait) ...... v Arthur Alcock Rambaut...... ix Index ...... xiii MINUTES OF MEETINGS OF THE ROYAL SOCIETY.
June 5, 1924. ^ Sir CHARLES SHERRINGTON, President, in the Chair. Prof. L. J. Rogers was admitted into the Society. The following Papers were read :— I. “ The Nature and Artificial Production of Consonant Sounds.” By Sir Richard Paget, Bart. Communicated by Sir William Bragg, F.R.S. II. “ A Method of Producing Strong Magnetic Fields.” By P. L. K apitza. Communicated by Sir Ernest R utherford, F.R.S.
III. “ On the Absorption and Scattering of y-Rays.” By N. Ahmad and E. C. Stoner. Communicated by Sir Ernest R uther ford, F.R.S. IV. “ The Analysis of the Absorption Spectrum of Naphthalene Vapour : Structure and Activation of the Molecule of Naph thalene.” By V. H enri, D.Sc., and H. de Laszl6. Com municated by Sir Ernest R utherford, F.R.S. V. “ On the Band-Spectra of Silicon Oxide and Chloride, and Chlorides of Carbon, Boron, and Aluminium.” By W. Jevons. Communicated by Prof. H. C. Plummer, F.R.S.
VI. “ The Lattice-Points of a Circle.” By J. E. Littlewood, F.R.S., and A. Walfisz. VII. “ Ultra-Violet Emission Bands Associated with Oxygen.” By R. C. Johnson. Communicated by Prof. T. R. Merton, F.R.S.
VIII. “ The Band-Spectrum of Hydrogen.” By H. S. Allen, D.Sc.. Communicated by Prof. 0. W. R ichardson, F.R.S. The Society adjourned over the Whitsun recess to June 19.
June 19, 1924. Sir CHARLES SHERRINGTON, President, in the Chair. Prof. J. F. Gemmill and Prof. L. J. Mordell were admitted into the Society. The following Papers were read :— I. On the Luminescence of Nitrogen, Argon and other Condensed Gases at very Low Temperatures.” By Prof. J. C. McLennan, F.R.S., and G. M. Shrum, Ph.D. II “ The Light of the Night Sky: its Intensity Variations when Analysed by Colour Filters.” By Lord R ayleigh, F.R.S. n I “ The Non-luminous Oxidation of Phosphorus in an Oxygen Atmosphere.” By Lord R ayleigh, F.R.S.
IV. “ The Catalytic Action of Copper.— Part IV.” By W. G. Palmer and F. H. Constable. Communicated by Sir William P ope, F.R.S. V. “ On the Fine Structure of the Band Spectra of Sodium, Potas sium and Sodium-Potassium Vapours.” By H. Grayson Smith. Communicated by Prof. J. C. McLennan, F.R.S. VI. “ The 27-day Period (Interval) in Terrestrial Magnetic Distur bance.” By Rev. A. L. Cortie, D.Sc. Communicated by Dr. C. Chree, F.R.S. VII. “ The Destruction of Rennin by Agitation.—A Case of Catalysis at an Air-Liquid Interface.” By E. K. R ideal and C. G. L. Wolf. Communicated by Sir William Pope, F.R.S. VIII. “ The Use of the Coherer to Investigate Adsorption Films.” By W. G. Palmer. Communicated by Sir William Pope, f "r .s . IX. “ On the Ultra-violet Spark Spectra of some of the Elements.” By R. J. Lang. Communicated by Prof. J. C. McLennan, f !r .s . X. “ Tabulated Data for the Examination of the 230 Space-Groups by Homogeneous X-rays.” By W. T. Astbury and Kathleen Yardley. Communicated by Sir William Bragg, F.R.S.
XI. “ On the Drift of Spinning Projectiles.” By J. W. Campbell. Communicated by Dr. J. S. Plaskett, F.R.S.
XII. “ Absorption of Lithium Vapour.” By A. L. N arayan, D.Sc., and D. Gunnaiya. Communicated by Lord R ayleigh, F.R.S.
June 26, 1924.
Sir CHARLES SHERRINGTON, President, in the Chair. Prof. C. V. Raman was admitted into the Society. The following Papers were read :_ I. The Electrification of Two Parallel Circular Discs.” By J. W. N icholson, F.R.S. II. The Influence of Initial Tension upon the Magnitude and Duration of the Mechanical Response in Skeletal Muscle.” By J. F. F ulton. Communicated by Sir Charles Sherring ton, O.M., P.R.S. III. “ An Automatic and Continuous Recording Balance. (The Oden-Keen Balance).” By J. R. H. Coutts, E. M. Crowther, B. A. Keen, and S. Oden. Communicated by Sir J ohn R ussell, F.R.S. IV. “ Chemical Studies in Gaseous Ionisation.—Part I and Part II.” By R. W. Lunt, Ph.D. Communicated by Prof. F. G. D onnan, F.R.S. V. “ A Self-Contained Standard Harmonic Wave-meter.” By D. W. D ye. Communicated by Sir J oseph Petavel, F.R.S. VI. “ The Influence of Atomic Arrangement on Refractive Index.” By W. L. Bragg, F.R.S.
VII. “ The Dynamics of Muscular Contraction.” By A. V. H ill, F.R.S., and H. S. Gasser.
VIII. “ The Colouring Matter of the Blue Pansy.” By G. S. Currey. Communicated by Sir F rederick K eeble, F.R.S. IX. “ Conduction of Excitation in Stem and Leaf of Mimosa pudica” By R. Snow. Communicated by Dr. A. Church, F.R.S. X. “ Thermodynamic Phenomena exhibited in a Shortening or Lengthening Muscle.” By R. Azuma. Communicated by Prof. A. V. H ill, F.R.S.
XI. “ The Ionic Nature of Haemoglobin.” By H. Taylor. Com municated by Prof. A. V. H ill, F.R.S. XII. “ On the Blood-Glands of Earth-worms of the Genus Phere- tima.” By J. Stephenson, D.Sc. Communicated by Prof. J. H. Ashworth, F.R.S. XIII. “ Supplementary Note on the Poison Gland of Trygon.” By H. Muir Evans, M.D. Communicated by Dr. H. H. D ale, F.R.S. XIY. The Indirect Measurement of the Aqueous Vapour-Pressure of Capillary Systems by the Freezing-Point Depression of Benzene.” By E. M. Crowther and A. N. Puri. Com municated by Sir John Russell, F.R.S. XV. “ Activity-Measurement by the Partition Method.—I.” By B. Cavanagh. Communicated by Prof. J. W. N icholson, F.R.S. XVL “ On the Determination of Molecular Fields.—Part I and Part II.” By J. E. Jones, D.Sc. Communicated by Prof. S. Chapman, F.R.S. XVII. An Experimental Study of the Viscous Properties of Water Vapour.” By C. J. Smith. Communicated by Prof. H. C. Callendar, F.R.S. XVIII. “ Discontinuity in the Dehydration of Certain Salt Hydrates.” By E. M. Crowther and J. R. H. Coutts. Communicated by Sir John R ussell, F.R.S. XIX. “ The Elastic Stability of an Annular Plate.” By W. R. D ean. Communicated by Prof. G. I. Taylor, F.R.S.
XX. “ The Effect of Argon on Certain Spectra.” By R. C. Johnson and W. H. B. Cameron. Communicated by Prof. T. R. Merton, F.R.S. XXI. “ On the Possible Ellipticity of Saturn’s Ring.” By G. R. Goldsbrough, D.Sc. Communicated by Prof. T. H. H ave lock, F.R.S. XXII. “ The Double Fourier Series of a Discontinuous Function.” By E. C. Titchmarsh. Communicated by Prof. G. H. H ardy, F. R.S. The Society adjourned over the Long Vacation to Thursday„ November 6. XVIII. “ Discontinuity in the Dehydration of Certain Salt Hydrates.” By E. M. Crowther and J. R. H. Coutts. Communicated by Sir John R ussell, F.R.S.
XIX. “ The Elastic Stability of an Annular Plate.” By W. R. D ean. Communicated by Prof. G. I. Taylor, F.R.S.
XX. “ The Effect of Argon on Certain Spectra.” By R. C. J ohnson and W. H. B. Cameron. Communicated by Prof. T. R. Merton, F.R.S. XXI. “ On the Possible Ellipticity of Saturn’s Ring.” By G. R. Goldsbrough, D.Sc. Communicated by Prof. T. H. H ave lock, F.R.S. XXII. “ The Double Fourier Series of a Discontinuous Function.” By E. C. Titchmarsh. Communicated by Prof. G. H. H ardy, F. R.S. The Society adjourned over the Long Vacation to Thursday, November 6.
November 6, 1924. \ Sir CHARLES SHERRINGTON, President, in the Chair. Sir Otto Beit and the Earl of Crawford were elected Fellows of the Society. The following papers were read :—
I. “ On Ultra-violet Spectro-photometry.” By T. R. Merton, F.R.S. II. “ A Theoretical Calculation of the Rhombohedral Angle of Crystals of the Calcite Type.” By W. L. Bragg, F.R.S., and * S. Chapman, F.R.S. III. The Striking and Breaking Potentials for Electron Discharges in Hydrogen.” By 0. W. R ichardson, F.R.S., and T. Tanaka. IV. On a P, Q and R Combination in the Many-lined Spectrum of Hydrogen.” By 0. W. Richardson, F.R.S., and T. Tanaka.
V. The Structure of Graphite.” By J. D. Bernal. Communi cated by Sir William Bragg, F.R.S.
November 13, 1924.
Sir CHARLES SHERRINGTON, President, in the Chair.
In pursuance of the Statutes, notice of the ensuing Anniversary Meeting was given from the Chair. The following papers were read :—
I. “ On the Total Reflexion of Light.” By Sir Arthur Schuster, For. Sec. R.S. II. “ The Molecular Structure of Thin Films.” Part VI. By N. K. Adam and J. W. W. Dyer. Communicated by W. B. Hardy, Sec. R.S.
HI. “ The Cataphoresis of Gas Bubbles in Water.” By T. Alty. Communicated by Sir Joseph Thomson, F.R.S. IV. ' Some Relations between the Optical Spectra of Different Atoms of the same Electron Structure. I.—Lithium-like and Sodium-like Atoms.” By D. R. H artree. Communicated by Sir Ernest Rutherford, F.R.S. \ . The Conditions for Statistical Equilibrium between Atoms, Electrons and Radiation.” By P. A. M. D irac. Communi cated by Sir Ernest Rutherford, F.R.S. VI. Boundary Lubrication.—Further Consideration of the Influence of the Composition of the Solid Face.” By Ida Doubleday. Communicated by W. B. Hardy, Sec. R.S. VII. '‘ The Stokes-Einstein Law for Diffusion in Solution.” By Christina C. Miller. Communicated by Sir James Walker, F. S. VIII. •• Studies of Co-ordination. Part I.—Absorption Spectra and Co-ordination of some Cupric Compounds.” By H elen S. French and T. M. Lowry, F.R.S. IX. “ On the Range of a-Particles in Rare Gases.” By L. F. B ates. Communicated by Sir Ernest Rutherford, F.R.S.
X “ The /3-Ray Spectrum of Mesothorium 2.” By D. H. B lack. Communicated by Sir Ernest Rutherford, F.R.S. XI “ The Thermal Expansion of Crystals of Metallic Bismuth. By J. Keith Roberts. Communicated by Sir Joseph Petavel, F.R.S. XII. “ Elastic Waves at the Surface of Separation of Two Solids/' By R. Stoneley. Communicated by Prof. H. F. Baker, F.R.S. XTII. “ The Constants of the Rydberg-Ritz Equation.” By J. H. Jones, Ph.D., and J. C. Boyce, M.A. Communicated by Prof. 0. W. Richardson, F.R.S.
November 20, 1924. Sir CHARLES SHERRINGTON, President, in the Chair. A Special General Meeting was held to consider the Annual Report of Council.
November 20, 1924. Sir CHARLES SHERRINGTON, President, in the Chair. In pursuance of the Statutes, notice of the ensuing Anniversary Meeting was given from the Chair, and the List of Officers and Council nominated for election was read, as follows :— President.—Sir Charles Scott Sherrington, O.M., G.B.E., M.D., Sc.D. Treasurer.—Sir David Prain, C.M.G., C.I.E. Q , ■ f William Bate Hardy, M.A. Secre anes.| Jameg Hopwood JeanSj M A ? d .Sc., LL.D. Foreign Secretary.—Sir Richard Tetley Glazebrook, K.C.B. Other Members of the Council.—Sir Frederick William Andrewes, D.M. ; Prof. James Hartley Ashworth, D.Sc. ; Dr. Francis William Aston, M.A. ; Sir William Henry Bragg, K.B.E., D.Sc. ; Prof. Sydney Chapman, D.Sc. ; Sir Dugald Clerk, K.B.E., D.Sc. ; Dr. Henry Hallett Dale, C.B.E., M.A. ; Prof. Frederick George Donnan, C.B.E., D.Sc. ; Prof. Arthur Stanley Eddington, M.A. ; Prof. Edwin Stephen Goodrich, M.A. ; Sir Thomas Henry" Holland, K.C.S.I., K.C.I.E. ; Prof. John Beresford Leathes, M.A. ; Prof. Thomas Ralph Merton, D.Sc. ; Dr. George Clarke Simpson ; Prof. Jocelyn Field Thorpe, D.Sc. ; Prof. Frederick Ernest Weiss, D.Sc. The following papers were read j « The Correlation between the Spectra of Various Haemoglobins and their Relative Affinities for Oxygen and Carbon Monoxide.” By J. Barcroft, F.R.S., M. L. Anson, A. E. Mirsky, and S. OlNUMA. IX. “ On Certain Abnormalities occurring in the Pituitary of the Frog.” By H. R. H ewer. Communicated by Prof. E. W. MacBride, F.R.S.
HI. “ The Effect of Grass on Trees.” By A. Howard, C.I.E. Com municated by Sir John Russell, F.R.S. IV. “ Blood Coagulation, Anti-Coagulants and Haemolysis.” By J. W. Pickering, D.Sc., and F. E. Taylor, M.D. Com municated by Prof. W. D. H alliburton, F.R.S. V. “ The Distribution of the Cytoplasmic Organs in Transplantable Tumour Cells: with Special Reference to Dictyokinesis.” By R. J. Ludford. Communicated by Prof. J. P. H ill, F.R.S. VI. “On the Balloon-like Structure of the Mammalian Erythrocyte.” By E. Ponder. Communicated by Sir E. Sharpey Schafer, F.R.S. VII. “ Uric Acid in the Pieridae : a Quantitative Study.” By V. B. Wigglesworth. Communicated by Prof. F. G. Hopkins, F.R.S. VIII. “ Contributions to the Comparative Anatomy of the Reptilian and the Amphibian Eye, chiefly based on Ophthalmological Examination.” By G. Lindsay Johnson, M.D. Communi cated by Dr. H. Gadow, F.R.S.