INDEX t o VOL. CXXX. (A)

Abell (T. B.) and Lamble (J. H.) The Distribution of Velocity in an Open Channel of Rectangular Section, 90.

Acetic acid, dissociation (Sidgwick and Woodward), 1.Allibone (T. E.) See Gedye and Allibone.Allmand (A. J.) and Burrage (L. J.) The Discontinuous Nature of the Process of Sorption

of Gases and Vapours by Porous Solids, 610.Allmand (A. J.) and King (R. B.) The Sorption of Water Vapour at Low Pressures by

Activated Charcoals, I, 210.Allmand (A. J.) and Puttick (A.) The Sorption of Carbon Tetrachloride at Low Pressures

by Activated Charcoals, IV, 197.Alpha particles, artificial disintegration (Chadwick, Constable and Pollard), 463.Alpha particles, scattering (Blackett and Champion), 380.Angus (W. R.) See Bailey, Cassie and Angus.Arnold (J. 0.), obituary notice, xxiii.Arnot (F. L.) The Diffraction of Electrons in Mercury Vapour, 655.Aston (F. W.) The Isotopic Constitution and Atomic Weights of Zinc, Tin, Chromium

and Molybdenum, 302.

Bailey (C. R.), Cassie (A. B. D.) and Angus (W. R.) Investigations in the Infra-Red Region of the Spectrum, I, II, 133, 142.

Bakerian Lecture—Robinson on Molecular Structure of Strychnine and Brucine, 431.Bangham (D. H.) and Fakhoury (N.) The Swelling of Charcoal, I, 81.Beta particles, loss of energy (Williams), 310, 328.Blackett (P. M. S.) and Champion (F. C.) The Scattering of Slow Alpha Particles by

Helium, 380.Bone (W. A.) and Fraser (R. P.) Flame Speeds in the “ Inflammation ” and “ Detonation ”

of Moist Carbonic Oxide-Oxygen Mixtures, 542.Brunt (D.) Some Phenomena connected with the Transfer of Heat by Radiation and

Turbulence in the Lower Atmosphere, 98.Bullard (E. C.) and Massey (H. S. W.) The Elastic Scattering of Slow Electrons in Argon,

579.Burrage (L. J.) See Allmand and Burrage.

Carbon tetrachloride, sorption at low pressures (Allmand and Puttick), 197.Carbonic oxide-oxygen mixtures, flame speeds (Bone and Fraser), 542.Cassie (A. B. D.) See Bailey, Cassie and Angus.Cathode rays, chemical effects (Gedye and Allibone), 346.Chadwick (J.), Constable (J. E. It.) and Pollard (E. C.) Artificial Disintegration by

a-Particles, 463.Champion (F. C.) See Blackett and Champion.Chapman (S.) and Stagg (J. M.) On the Variability of the Quiet-Day Diurnal Magnetic

Variation, II, 668.Charcoal, swelling (Bangham and Fakhoury), 81.Constable (J. E. R.) See Chadwick, Constable and Pollard.

VOL. CXXX.— A. d

XXX11

Darwin (C. G.) Examples of the Uncertainty Principle, 632.Davidson (P. M.) and Price (W. C.) Extended Energy Functions of the Hydrogen

Molecule, 105.

Eddy system in wake of flat circular plates (Marshall and Stanton), 295.Egerton (A. C.) and Milford (M.) On Optical Pyrometry, 111.Electronic emissions, from foils and tissues, secondary (Mayneord), 63.Electrons, diffraction in mercury vapour (Arnot), 655. t Electrons, emission (Richardson and Grimmett), 217.Electrons, energy losses (Rudberg), 182.Electrons in argon, elastic scattering (Bullard and Massey), 579.Electrons in crystal lattices, quantum mechanics (Kronig and Penney), 499.

Fakhoury (N.) See Bangham and Fakhoury.Ferromagnetic crystals, magnetisation (Powell), 167.Filon (L. N. G.) and Harris (F. C.) The Photo-Elastic Dispersion of Vitreous Silica, 410. Fisher (R. A.) The Moments of the Distribution for Normal Samples of Measures of

Departure from Normality, 16.Force required to stop an electrified sphere (Searle), 389.Fraser (R. P.) See Bone and Fraser.Freeth (F. A.) and Verschoyle (T. T. H.) Physical Constants of the System Methane-

Hydrogen, 453.

Gamma rays, hard, scattering (Gray), 524.Garstang (W. L.) and Hinshelwood (C. N.) The Kinetics of the Combination of Hydrogen

and Oxygen : the Influence of Iodine, 640.Gedye (G. R.) and Allibone (T. E.) The Chemical Effects of Cathode Rays, I, 346. Goldsbrough (G. R.) The Tidal Oscillations in an Elliptic Basin of Variable Depth, 157. Gray (L. H.) The Scattering of Hard Gamma Rays, II, 524.Griffiths (J. G. A.) and Norrish (R. G. W.) The Photosensitised Decomposition of

Nitrogen Trichloride, I, 591.Grimmett (L. G.) See Richardson and Grimmett.

Harris (F. C.) See Filon and Harris.Heat, transfer by radiation and turbulence (Brunt), 98.Herbert (E. G.) The Hardening of Metals by Rotating Magnetic Fields, 514.Hinshelwood (C. N.) See Garstang and Hinshelwood.Hydrogen, chemical constant and entropy (Stern), 367.Hydrogen molecule, energy functions (Davidson and Price), 105.

Infra-red region of spectrum (Bailey, Cassie and Angus), 133, 142.Isotopes of zinc, tin, chromium and molybdenum (Aston), 302.

Jackson (C. V.) Interferometric Measurements in the Arc Spectrum of Iron, 395.

Kinetics of combination of hydrogen and oxygen (Garstang and Hinshelwood), 640.King (R. B.) See Allmand and King.Kronig (R. de L.) and Penney (W. G.) Quantum Mechanics of Electrons in Crystal

Lattices, 499.

Lamble (J. H.) See Abell and Lamble. -Le Bel (J. A.), obituary notice, xxviii.

XXX111

Magnetic variation, quiet-day variability (Chapman and Stagg), 668.Magnetisation of single ferromagnetic crystals (Powell), 167.Marshall (D.) and Stanton (T. E.) On the Eddy System in the Wake of Flat Circular

Plates in Three Dimensional Flow, 295.Massey (H. S. W.) See Bullard and Massey.Mayneord (W. V.) Secondary Electronic Emissions from Metals Foils and Animal Tissues,

63.McCormick (W. S.), obituary, xv.Mercury singlet terms, fine structure (Tolansky), 558.Metals, hardening by rotating magnetic fields (Herbert), 514.Methane-hydrogen system, physical constants (Freeth and Verschoyle), 453.Milford (M.) See Egerton and Milford.Moments of distribution for normal samples (Fisher), 16.

Nitrogen trichloride, photosensitised decomposition (Griffiths and Norrish), 591.Norrish (R. G. W.) See Griffiths and Norrish.

Obituary notices :—

Arnold, J. 0 ., xxiii.Le Bel, J. A., xxviii.McCormick, W. S., xv.

Optical pyrometry (Egerton and Milford), 111.Oscillator, symmetric spherical (Stern), 551.

Penney (W. G.) See Kronig and Penney.Perkin (W. H.), obituary notice, i.Photometer for X-ray analysis (Robinson), 120.Pollard (E. C.) See Chadwick, Constable and Pollard.Powell (F. C.) The Direction of Magnetisation of Single Ferromagnetic Crystals, 167. Presidential Address, 239.Price (W. C.) See Davidson and Price.Puttick (A.) See Allmand and Puttick.

Ramakrishna Rao (I.) The Behaviour of Water with Change of Temperature and with Addition of Electrolytes as Studied by the Raman Effect, 489.

Raman effect (Ramakrishna Rao), 489Richardson (0. W.) and Grimmett (L. G.) The Emission of Electrons under the Influence

of Chemical Action at Lower Gas Pressures, 217.Rideal (E. K.) See Schulman and Rideal.Robinson (B. W.) An Integrating Photometer for X-Ray Crystal Analysis, 120.Robinson (R.) The Molecular Structure of Strychnine and Brucine, 431.Rudberg (E.) Energy Losses of Electrons in Carbon Monoxide and Carbon Dioxide, 182. Rutherford (Sir Ernest) Address at Anniversary Meeting, 239.

Schulman (J. H.) and Rideal (E. K.) On the Surface Potentials of Unimolecular Films of Long Chain Fatty Acids, I, II, III, 259, 270, 284.

Schonland (B. F. J.) Thunder-storms and the Penetrating Radiation, 37.Searle (G. F. C.) On the Force Required to Stop a Moving Electrified Sphere, II, 389.

Perkin, W. H., i. Swinton, A. A. C., xiii.

X XX IV

Sidgwick (N. V.) and Woodward (L. A.) Spectrometric Determinations of the Effect of a Neutral Salt on the Dissociation of Acetic Acid, 1.

Silica, photo-elastic dispersion (Filon and Harris), 410.Sorption of gases and vapours by porous solids (Allmand and Burrage), 610.Sorption of carbon tetrachloride (Allmand and Puttick), 197.Sorption of water vapour (Allmand and King), 210.Spectrometric determinations on acetic acid (Sidgwick and Woodward), 1.Spectrum, infra-red region (Bailey, Cassie and Angus), 133, 142.Spectrum of iron (Jackson), 395.Spectrum, mercury singlets (Tolansky), 558.Spectrum, Raman effect on behaviour of water (Ramakrishna Rao), 489.Stagg (J. M.) See Chapman and Stagg.Stanton (T. E.) See Marshall and Stanton.Stern (T. E.) The Chemical Constant of Hydrogen Vapour and the Entropy of Crystalline

Hydrogen, 367 ; The Symmetric Spherical Oscillator, and the Rotational Motion of Homopolar Molecules in Crystals, 551.

Strychnine and Brucine, molecular structure (Robinson), 431.Swinton (A. A. C.), obituary notice, xiii.

Thunder-storms, penetrating radiation (Schonland), 37.Tidal oscillations (Goldsbrough), 157.Tolansky (S.) Fine Structure in the Mercury Singlet Terms, 558.Turbulence in the lower atmosphere (Brunt), 98.

Uncertainty principle, examples (Darwin), 632.Unimolecular films, surface potentials (Schulman and Rideal), 259, 270, 284.

Velocity in open channel (Abell and Lamble), 90.Verschoyle (T. T. H.) See Freeth and Verschoyle.

Water vapour, sorption at low pressures (Allmand and King), 210.Watson (G. N.) The Use of Series of Bessel Functions in Problems connected with

Cylindrical Wind-Tunnels, 29.Williams (E. J.) The Rate of Loss of Energy by (3-Particles in passing through Matter, 310 ;

The Loss of Energy of (3-Particles and its Distribution between different kinds of Collisions, 328.

Wind-tunnels, cylindrical (Watson), 29.Woodward (L. A.) See Sidgwick and Woodward.

X-ray crystal analysis, photometer (Robinson), 120.

Zinc isotopes (Aston), 302.

END OF THE ONE HUNDRED AND THIRTIETH VOLUME (SERIES A).

MINUTES OF MEETINGS OF THE ROYAL SOCIETY.

November 6, 1930.

Sir Ernest RUTHERFORD, O.M., President, in the Chair.

The Right Honourable James Ramsay Macdonald was admitted into the Society.

Dr. E. J. Butler, Professor A. Fowler and Professor J. F. Thorpe were appointed Auditors of the Society’s Accounts on behalf of the Society.

The following Papers were read :—

I. W. A. B one, F.R.S., and S. G. Hill. “ The Slow Combustion of Ethane.”

II. A. Fage and W. H. Falkner. “ An Experimental Determination of the Intensity of Friction on the Surface of an Aerofoil.” Communicated by L. Bairstow, F.R.S.

III. A. M. Tyndall and C. F. Powell. u The Mobility ofIons in Pure Gas.” Communicated by A. P. Chat- took, F.R.S.

IV. S. Chapman, F.R.S., and A. T. Price. “ The Electricand Magnetic State of the Interior of the Earth.”

V. A. J. Allmand, F.R.S., and R. Chaplin. “ The Sorption of Carbon Tetrachloride at Low Pressures by Activated Charcoals.—II and III.''

VI. R. H. F owler, F.R.S. “ Speculations concerning the oc-(3- and y-rays of Ra B, C, C', I .”

VII. J. H. Schulman and E. K. Rideal, F.R.S. On the Surface Potentials of Unimolecular Films of Long Chain Fatty Acids.—I-III .”

VIII. F. A. Freeth, F.R.S., and T. T. H. Verschoyle.“ Physical Constants of the System Methane- Hydrogen.” •

IX. J. C. McLennan, F.R.S., and E. J. Allin. “ The Fine-Structure of Some Lines in the Visible Region of the Spectrum of Thallium III.

X. J. C. McLennan, F.R.S., and A. M. I. A. W. D urnford.“ Zeeman Effect for Fine Structure Components of Thallium Spectral Lines.”

XI. G. F. C. Searle, F.R.S. “ On the Force required to Stop a Moving Electrified Sphere. II. ’

[ ii ]

XII. J. C. McLennan, F.R.S., and H. J. C. Ireton. “ On the Spectroscopy of Auroral Green Line Radiation.”

XIII. R. Fort and C. N. H inshelwood, F.R.S. “ FurtherInvestigation on the Kinetics of Gaseous Oxidation Reactions.”

XIV. C. N. H inshelwood, F.R.S., and K. Clusius. “ TheDisplacement by Ultra-Violet Light of the Explosives Limit in a Chain Reaction.”

XV. C. D. Ellis, F.R.S., and G. H. Aston. “ The Absolute Intensities and Internal Conversion Coefficients of the y-Rays of Ra B and Ra C.”

XVI. J. C. McLennan, F.R.S., and E. J. Allin. “ TheHyperfine Structure of some Lines in the Arc and First Spark Spectrum of Indium.”

XVII. J. C. McLennan , F.R.S., A. B. McLay and M. F.Crawford. “ Spark Spectra of Bismuth, Bi II and Bi III. Evidence of Hyperfine Structure.”

XVIII. Sir Ernest R utherford, P.R.S., F. A. B. Ward and C. E. Wynn-Williams. “ A New Method of Analysis of Groups of a-Rays.—I.”

XIX. A. A. Robb, F.R.S. “ On a Symmetrical Analysis of Conical Order and its Relation to Time-Space Theory.”

XX. R. A. Fisher, F.R.S. “ The Moments of the Distribu­tion for Normal Samples of Measures of Departure from Normality.”

XXI. W. V. Mayneord. “ Secondary Electronic Emissions from Metal Foils and Animal Tissues.” Communi­cated by H. Hartridge, F.R.S.

XXII. D. FI. Bangham and N. Fakhoury. “ The Swelling ofCharcoal.—I.” Communicated by D. L. Chapman. F.R.S.

XXIII. I. Ramakrishna Rao. “ The Behaviour of Water withChange of Temperature and with Addition of Electro­lytes as Studied by the Raman Effect.” Communi­cated by 0. W. Richardson, F.R.S.

XXIV. E. Rudberg. “ Energy Losses of Electrons in Nitro­gen.” Communicated by 0. W. Richardson, F.R.S.

XXV. E. R udberg. “ Energy Losses of Electrons in CO and C 02.” Communicated by 0. W. Richardson, F.R.S.

[ in ]

XXVII.

XXVIII.

XXIX.

XXX.

XXXI.

XXXII.

XXXIII.

XXXIV.

XXXV.

XXXVI.

XXVI.

XXXVII.

L. R osenhead and M. Schwabe. c£ An Experimental Investigation of the Flow behind Circular Cylinders in Channels of Different Breadths.” Communicated by H. Jeffreys, F.R.S.

K. Krishnamurti. " The Scattering of Light in Protein Solutions.—I.” Communicated by F. G. D onnan, F.R.S.

R. Bhattacharya and T. P. H ilditch. “ The Struc­ture of Synthetic Mixed Triglycerides.”

B. K. Vaidya. “ Geometrical Inversion in Light.” Communicated by E. C. C. Baly, F.R.S.

R. Shaw and J. A. V. Butler. “ The Behaviour of Electrolytes in Mixed Solvents.” Communicated by J. Kendall, F.R.S.

R. W. B. P earce. “ The A 3400 Band of Phosphorus Hydride.” Communicated by A. Fowler, F.R.S.

R. W. France. “ The Absorption Spectrum of Lithium Vapour.” Communicated by S. R. Milner, F.R.S.

M. DelbrPck. “ The Interaction of Inert Gases.” Communicated by R. H. Fowler, F.R.S.

T. B. Abell and J. H. Lambie. “ The Distribution of Velocity in an Open Channel of Rectangular Section.” Communicated by J. Proudman, F.R.S.

J. D. Cockroft and E. T. S. Walton. “ Apparatus for the Production of High Velocity Positive Ions.” Communicated by Sir Ernest Rutherford, P.R.S.

J. Ewles. “ The Nature and Size of the Luminescent Centre.” Communicated by R. Whiddington, F.R.S.

J. E. Lennard-Jones. “ Perturbation Problems in Quantum Mechanics.” Communicated by R. H. Fowler, F.R.S.

November 13, 1930.

Sir Henry LYONS, Treasurer and Vice-President, in the Chair.

I. G. Endres, B. H. C. Matthews, H. Taylor and A. D ale. “ Observations on certain Physiological Pro­cesses 'of the Marmot, I-V .” Communicated by J. Barcroft, F.R.S.

II. J. Gray, F.R.S. “ The Mechanism of Ciliary Move­ment.”

III. W. S. D uke-Elder and P. M. D uke-Elder. “ TheContraction of the Extrinsic Muscles of the Eye by Choline and Nicotine.” Communicated by C. Lovatt Evans, F.R.S.

IV. C. D. D arlington. <c A Cytological Demonstration of‘ Genetic9 Crossing-Over.” Communicated by Sir Daniel Hall, F.R.S.

V. W. Moppett. “ The Differential Action of X-Rays on Tissue Growth and Vitality, II, III, IV.” Communi­cated by J. T. Wilson, F.R.S.

VI. J. Mellanby, F.R.S. “ Prothrombase—Its Prepara­tion and Properties.”

VII. R. H ill and D. K eilin, F.R.S. “ The Porphyrin of • Component c of Cytochrome and its Relationship to

other Porphyrins.”

VIII. A. Geiger. “ The Isolation by Cataphoresis of two different Oxy-hsemoglobins from the Blood of some Animals.” Communicated by H. H. D ale, Sec. R.S.

IX. R. D eanesly. “ The Development and Vascularization of the Corpus Luteum in the Mouse and Rabbit.” Communicated by J. P. Hill, F.R.S.

November 20, 1930.

Sir Ernest RUTHERFORD, O.M., President, in the Chair.At a Special General Meeting, called in accordance with Statute 92

to discuss a proposal provisionally agreed on by Council to amend Statute 5, it was resolved : “ That this meeting approves the proposal of the Council to amend Statute 5, so as to increase the number of annual nominations to the Fellowship from fifteen to seventeen.”

[ V j

Sir Ernest RUTHERFORD, O.M., President, in the Chair.

The following papers were read :—

I. Lord Rayleigh, F.R.S. 44 Iridescent Colours of Birds and Insects.”

II. C. R. Bailey, A. B. D. Cassie, and W. R. Angus. 44 Investigations in the Infra-Red Region of the Spectrum.—I, II.” Communicated by F. G. D onnan, F.R.S.

III. J. K. Roberts. 44 The Exchange of Energy betweenGas Atoms and Solid Surfaces.” Communicated by Sir Ernest R utherford, P.R.S.

IV. G. I. Taylor, F.R.S. 44 The Application of OsborneReynold’s Theory of Heat Transfer to Flow through a Pipe.”

V. G. M. B. D obson, F.R.S., H. H. Kimball and E. Kidson. 44 Observations on the Amount of Ozone in the Earth’s Atmosphere and its Relation to other Geophysical Conditions.—IV.”

VI. N. V. Sidgwick, F.R.S., and L. A. Woodward. 44 Spectrometric Determinations of the Effect of a Neutral Salt on the Dissociation of Acetic Acid.”

VII. N. V. Sidgwick, F.R.S., W. J. Worboys and L. A. Woodward. 44 Colorimetric Investigations of Indi­cators in Presence of Neutral Salts.”

VIII. Lord Rayleigh, F.R.S. “ Absolute Intensity of the Aurora Line in the Night Sky and the Number of Atomic Transitions required to Maintain it.”

IX. G. N. Watson, F.R.S. 44 The Use of Series of Bessel Functions in Problems connected with Cylindrical Wind Tunnels.”

X. A. C. Egerton, F.R.S., and M. Milford. “ On Optical Pyrometry.”

XI. A. J. Allmand, F.R.S., and R. B. King. The Sorption of Water Vapour at Low Pressures by Activated Charcoals...-Part I. ’

XII. W. H. Lang, F.R.S., and 1. Cookson. 44 Some Fossil Plants of Early Devonian Type from the Walhalla Series, Victoria, Australia.”

November 20, 1930.

[ Vi ]

XIII. A. V. H ill, F.R.S. “ The Heat Production in Isometricand Isotonic Twitches.”

XIV. A. Craig-Bennett. “ The Reproductive Cycle of theThree-Spined Stickleback, Gasterosteus aculeatus, Linn.” Communicated by J. S. Gardiner, F.R.S.

XV. R. J. Ludford. “ The Vital Staining of Normal andMalignant Cells.—III.” Communicated by J. A. Murray, F.R.S.

XVL M. Penrose and J. H. Quastel. “ Cell Structure and Cell Activity.” Communicated by Sir Frederick H opkins, F.R.S.

XVII. T. Moran. “ The Frozen State in Mammalian Muscle.” Communicated by Sir William Hardy, F.R.S.

XVIII. A. S. Parkes. “ The Functions of the Corpus Luteum.—IV.” Communicated by C. Lovatt Evans, F.R.S.

XIX. F. A. Askew, R. B. Bourdillon, H. M. B ruce, R. G. C.J enkins and T. A. Webster. “ The Effects of Further Irradiation of the Radiation Products of Ergosterol.” Communicated by H. H. D ale, Sec. R.S.

XX. F. A. Askew, R. B. Bourdillon, H. M. Bruce, R. G. C. Jenkins and T. A. Webster. “ The Distillation of Vitamin D.” Communicated by H. H. D ale, Sec. R.S.

XXI. R. H ill. “ A Method for the Estimation of Iron in Biological Material.” Communicated by Sir Frederick H opkins, F.R.S.

XXII. C. Todd. “ Cellular Individuality in the Higher Animals, with special reference to the Individuality of the Red Blood Corpuscle.—II.” Communicated by H. H. D ale, Sec. R.S.

XXIII. H. W. S. Massey. “ Theory of the Elastic Scattering of Electrons in Molecular Hydrogen.” Communi­cated by R. H. Fowler, F.R.S.

XXI V. L. R osenhead. “ The Effect of Wind Tunnel Inter­ference on the Characteristics of an Aerofoil.” Com­municated by H. Jeffreys, F.R.S.

XXV. G. I. Finch and H. H. Thompson. “ Gaseous Combus­tion in Electric Discharges.—Part V.” Communi­cated by W. A. Bone, F.R.S.

[ vii ]

XXVI.

XXVII.

XXVIII.

XXIX.

XXX.

XXXI.

XXXII.

XXXIII.

XXXIV.

XXXV.

XXXVI.

XXXVII.

XXXVIII.

G. I. Finch and W. L. Patrick. “ Gaseous Combustion in Electric Discharges.—Parts VI and VII.” Com­municated by W. A. Bone, F.R.S.

E. Rudberg. “ On a Search for Radiation Accompany­ing the Scattering of Comparatively Slow Electrons at the Surface of Incandescent Solids.” Communi­cated by 0. W. R ichardson, F.R.S.

A. D. Crow and W. E. Grimsiiaw. “ On the Equation of State of Propellent Gases.” Communicated by Sir George Hadcock, F.R.S.

F. L. Arnot. “ The Passage of an Electric Beam through a Field Free Enclosure.” Communicated by Sir Ernest Rutherford, P.R.S.

W. T. Astbury and A. Street. “ X-Ray Studies of the Structure of Hair Wool and Related Fibres.—I.” Communicated by Sir William Bragg, F.R.S.

F. C. Powell. “ The Direction of Magnetisation of Single Ferromagnetic Crystals.” Communicated by R. H. F owler, F.R.S.

B. F. J. Schonland. “ Thunderstorms and the Penetrating Radiation.” Communicated by C. T. R. Wilson, F.R.S.

B. W. R obinson. “ An Integrated Photometer for X-Ray Crystal Analysis.” Communicated by Sir William Bragg, F.R.S.

P. M. D avidson and W. C. Price. “ Extended Energy Functions of the Hydrogen Molecule.” Communi­cated by 0 . W. Richardson, F.R.S.

G. R. Gedye and T. E. Allibone. “ The Chemical Effect of Cathode Rays.—I.” The Decomposition of Ammonia. Communicated by E. K. Rideal, F.R.S.

G. R. Goldsbrough, F.R.S. “ The Tidal Oscillations in an Elliptic Basin of Variable Depth. ”

D. Brunt. “ Some Phenomena Connected with the Transfer of Heat by Radiation and Turbulence in the Lower Atmosphere.” Communicated by G. C. Simpson, F.R.S.

E. J. Williams. “ The Rate of Loss of Energy by [3-Particles in Passing through Matter.” Communi­cated by W. L. Bragg, F.R.S.

[ viii J

XXXIX. E. J. Williams. “ The Loss of Energy of (3-Particles and its Distribution between Different Collisions.” Communicated by W. L. Bragg, F.R.S.

December 1 , 1930.

Anniversary Meeting.

Sir Ernest RUTHERFORD, O.M., President, in the Chair.

The report of the Auditors of the Treasurer’s accounts was read and the thanks of the Society were given to the Treasurer and to the Auditors.

The Lists of Fellows deceased and of Fellows and Foreign Members elected into the Society since the last Anniversary were read.

The Report to the Society from the Council upon the wrork during the past year was, upon the motion of the President, received.

The President delivered his Anniversary Address. On the motion of Professor H. E. Armstrong, seconded by Sir Archibald Garrod, the thanks of the Society were returned to the President for his Address.

The Awards of the Medals for the year were announced as follows, and the Medals were presented from the Chair :—

The Copley Medal The Rumford Medal A Royal Medal ...A Royal Medal ... The Davy Medal The Darwin Medal The Hughes Medal

to Sir William Bragg.,, Professor P. Debye.„ Professor J. E. Marr.,, Professor 0. W. Richardson. ,, Professor R. Robinson.,, Professor J. Schmidt.„ Sir Venkata Raman.

The President having, with the consent of the Society, nominated Dr. G. M. B. Dobson and Mr. R. H. Fowler as Scrutators to examine the balloting lists for the election of Council and Officers, the votes of the Fellows present were taken. The Scrutators reported that the Council and Officers whose names had been read at the preceding- meeting had been duly elected as under :—

President.—Sir Frederick Gowland Hopkins, M.A., D.Sc.Treasurer.—Sir Henry George Lyons, D.Sc.

Secretaries S D t' HenjX Hallett Dale> C-B E > MA- \D r . Frank Edward Smith, C.B., C.B.E.

Foreign Secretary.—The Lord Rayleigh, M.A., Sc.D.Other Members of the Council.—Professor Edward Victor Appleton,

M.A., D.Sc. ; Professor George Barger, M.A., D.Sc. ; Professor Arthur Edwin Boycott, M.A., D.M., LL.D. ; Professor Edward Provan

[ i x ]

Cathcart, C.B.E., M.D. ; Sir James Alfred Ewing, K.C.B., M.A., D.Sc. ; Professor Edwin Stephen Goodrich, M.A., D.Sc.; Professor Godfrey Harold Hardy, M.A. ; Sir Harold Brewer Hartley, C.B.E., M.C., M.A. ; Sir Thomas Lewis, M.D., D.Sc. ; Dr. William Hobson Mills, M.A.; Professor Edward Arthur Milne, M.B.E., M.A. ; Dr. Alfred Barton Rendle, M.A. ; Professor Richard Vynne Southwell, M.A. ; Professor Geoffrey Ingram Taylor, M.A. ; Professor David Meredith Seares Watson, M.Sc. ; Professor William WThitehead Watts, Sc.D., LL.D.

December 11, 1930.

Sir F. Gowland HOPKINS, President, in the Chair.

Professor Jules Bordet was admitted into the Society.The President announced that he had appointed the following to

be Vice-Presidents for the ensuing year :—

Sir Alfred Ewing.Professor E. S. Goodrich.Sir Henry Lyons.The Lord Rayleigh.

Professor J. Bordet delivered the Croonian Lecture on “ Les Theories des Bacteriophages.”

January 15, 1931.

Sir F. Gowland HOPKINS, President, in the Chair.

In pursuance of the Statutes, the names of Candidates proposed forelection into the Society were read,Adam, Niel Kensington.Andrews, Ernest Clayton.Barnett, Edward de Barry Barrington, Frederick James

Fitzmaurice.Bartlett, Frederic Charles.Beaven, Edwin Sloper.Bengough, Guy Dunston.Berwick, William Edward

Hodgson.Bidder, George Parker.Black, Davidson.

as follows:—Blacklock, Donald Breadalbane. Boswell, Percy George Hamnall. Bowley, Arthur Lyon.Brady, Oscar Lisle.Briggs, George Edward.Burt, Cyril Ludowic.Campbell, James Argyll.Carter, Frederick William. Castellani, Senator Sir Aldo. Clark, Alfred Joseph.Collip, James Bertram.

[ X ]

Cooper, Clive Forster.Crew, Francis Albert Eley. Crowther, James Arnold.Curtis, William Edward.Dart, Raymond Arthur.Davidson, Charles.Dawson, Harry Medforth.Dean, Henry Roy.Dewey, Henry.Dhar, Nilratan.Doodson, Arthur Thomas. Douglas, Rear-Admiral Henry

Percy.Drummond, Jack Cecil.Drysdale, Charles Vickery. Duke-Elder, William Stewart. Dunn, John Shaw.Eckersley, Thomas Lydwell. Edgeworth, Francis Henry. Evershed, Sydney.Fearnsides, William George. Ferguson, Allan.Fildes, Paul.Fleming, Alexander.Flower, Major Stanley Smyth. Gardner, John Addyman.Garner, William Edward. Garstang, Walter.Gatenby, James Bronte.Gates, Reginald Ruggles.Gibb, Sir Alexander.Gibson, Charles Stanley.Gill, Ernest Walter Brudenell. Glauert, Hermann.Gough, Herbert John.Grant, Ronald Thomson.Gray, James Gordon.Green, Edward Ernest.Haldane, John Burdon Sanderson. Hammond, John.Harington, Charles Robert. Heilbron, Isidor Morris.Hilditch, Thomas Percy.Hill, Thomas George.Hindle, Edward.Hinton, Martin Alister Campbell.

Houston, Sir Alexander Cruik-shank

Hurst, Charles Chamberlain. Huxley, Julian Sorell.James, Sydney Price.Jeffcott, Henry Homan.Jehu, Thomas John.Jenkin, Charles Frewen.Keen, Bernard Augustus.Kemp, Stanley Wells.Kenyon, Joseph.King, Harold.Laby, Thomas Howell.Lambert, Bertram.Lea, Frederick Charles. Lennard-Jones, John Edward. Levy, Hyman.Louis, Henry.Ludford, Reginald James. McIntosh, James.Masson, Irvine.Miller, Frederick Robert.Moir, James Reid.Newman, Frederick Henry.Orr, John Boyd.Orton, James Henry.Palmer, Frederick.Parkes, Alan Sterling.Parks, William Arthur.Parsons, Frederick Gymer. Partington, James Riddick. Patterson, Thomas Stewart. Percival, John.Peters, Rudolph Albert.Pidduck, Frederick Bernard. Prideaux, Edmund Brydges

Rudhall.Priestley, John Gillies.Rankine, Alexander Oliver.Read, John.Redmayne, Sir Richard Augustine

Studdert.Salaman, Redcliffe Nathan. Salisbury, Edward James.Sewell, Robert Beresford Seymour. Simonsen, John Lionel.

[ xi ]

Slade, Roland Edgar.Smith, Bernard.Smith, Thomas.Spencer, William Kingdon. Titchmarsh, Edward Charles. Trechmann, Charles Taylor. Trotter, Wilfred.Turnbull, Herbert Westren. Tyndall, Arthur Mannering. Usher, Charles Howard.

Verney, Ernest Basil.Walker, Miles.Watson, Sir Malcolm. Wedderburn, Joseph Henry

Maclagan.Wheeler, Richard Vernon. Wilson, Forsyth James. Wimperis, Harry Egerton. Yorke, Warrington.

The following papers were read :—

I. Lord Rayleigh, F.R.S. “ Iridescent Colours of Birds and Insects.”

II. 0. W. R ichardson, F.R.S., and L. G. Grimmett. “ The Emission of Electrons under the Influence of Chemical Action at Lower Gas Pressures.”

III. E. G. H erbert. “ The Hardening of Metals by RotatingMagnetic Fields.” Communicated by W. Rosenhain,F.R.S.

IV. A. J. Allmand, F.R.S., and A. P uttick. “ The Sorption ofCarbon Tetrachloride at Low Pressures by Activated Charcoals. Part IV.”

V. D. Marshall and Sir Thomas Stanton, F.R.S. “ The Eddy System in the Wake of Flat Circular Plates in Three Dimen­sional Flow.”

VI. J. Chadwick, F.R.S., J. E. R. Constable and E. C. Pollard. “ Artificial Disintegration by a-Particles.”

VII. G. F. Brett. “ The Combination of Nitrogen and Hydrogen Activated by Electrons.” Communicated by A. P. Chattock, F.R.S.

VIII. T. E. Stern. “ The Chemical Constant of Hydrogen Vapour and the Entropy of Crystalline Hydrogen.” Communicated by R. H. Fowler, F.R.S.

IX. R. de L. Kronig and W. G. Penney . “ Quantum Mechanics of Electrons in Crystal Lattices.” Communicated by R. H. Fowler, F.R.S.

X. T. E. Stern. “ The Symmetric Spherical Oscillator and the Rotational Motion of Homopolar Molecules in Crystals. Communicated by R. H. Fowler, F.R.S.

XI. L. H. Gray. “ The Scattering of Hard Gamma Rays. II.” Communicated by Sir E r n est R u t h e r fo r d , F.R.S.

[ xii ]

XII. S. Tolansky. “ Fine Structure in the Mercury Singlet Terms.” Communicated by T. H. Havelock, F.E.S.

January 22, 1931.

Sir F. Gowland HOPKINS, President, in the Chair.

The following papers were read :—

I. Sir Thomas Stanton, F.E.S. “ The Development of a High Speed Wind Channel for Eesearch in External Ballistics.”

II. P. M. S. B lackett and F. C. Champion. “ The Scattering of Slow a-Particles in Helium.” Communicated by Lord E utherford, F.E.S.

III. G. Cook. “ The Yield Point and Initial Stages of PlasticStrain in Mild Steel.” Communicated by E. V. Appleton, F.E.S.

IV. W. A. Bone, F.E.S., E. P. Fraser and F. Lake. “ Explosionsof Mixtures of Acetylene and Electrolytic Gas.”

V. W. A. B one, F.E.S., and E. P. Fraser. “ Flame Speedsin the Inflammation and Detonation of C0-02 Mixtures.”

VI. F. W. Aston, F.E.S. “ The Isotropic Constitution andAtomic Weights of Zinc, Chromium and Molybdenum.”

VII. T. T. H. Verschoyle. “ The Ternary System of Carbon Monoxide-Nitrogen-Hydrogen.” Communicated by F. A. Freeth, F.E.S.

VIII. D. G. Dhavale. “ The Spectrum of Singly Ionised Antimony.” Communicated by M. N. Saha, F.E.S.

IX. C. V. Jackson. “ Interferometric Measurements in the Arc Spectrum of Iron.” Communicated by A. F owler, F.E.S.

January 29, 1931.Sir F. Gowland HOPKINS, President, in the Chair.

The following papers were read :—

I. W. Fernando. “ The Origin of the Mesoderm in the Gastro­pod Viviparus (— Paludina)” Communicated, by E. W. MacBride, F.E.S.

[ xiii J

II. W. Fernando. “ The Origin and Development of the Peri­cardium and Kidneys in Ostrea.” Communicated by E. W. MacBride, F.R.S.

III. L. A. Harvey. 4 4 Studies on Echinoderm Oogenesis. I,Antedon bifida (Pennant). II, Asterias rubens (Linn.).” Communicated by J. H. Ashworth, F.R.S.

IV. J. Y oung. 44 The Pupillary Mechanism of the TeleosteanFish Uranoscopus scaber.” Communicated by E. S. Goodrich, F.R.S.

V. N. J. Berrill. 44 Studies in Tunicate Development.” Communicated by D. M. S. Watson, F.R.S.

VI. E. C. Smith. 44 The Heat of Rigor of Mammalian Muscle.” Communicated by Sir William Hardy, F.R.S.

VII. G. E. Briggs. 44 The Accumulation of Electrolytes in Plant Cells.” A Suggested Mechanism. Communicated by F. F. Blackman, F.R.S.

VIII. M. H ill and A. S. Parkes. 44 The Relation between the Pituitary Body and the Gonads. III. Fractionation and dilution of ovary-stimulating extracts.” Communicated by C. Lovatt Evans, F.R.S.

IX. E. Charles. 44 Metabolic Changes Associated with Pig­mentary Effector Activity and Pituitary Removal in Xeno- pus laevis, I, II .” Communicated by H. H. Dale, Sec. R.S.

February 5, 1931.

Sir F. Gowland HOPKINS, President, in the Chair.

The following papers were read :—

I. C. F. Jenkin. 44 The Pressure Exerted by Granular Mate­rial.” Communicated by Sir Alfred Ewing, F.R.S.

II. F. L. Arnot. 44 The Diffraction of Electrons in Mercury Vapour.” Communicated by Lord Rutherford, F.R.S.

III. S. Rama Swamy. 44 On the Transmission of Light by ThinFilms of Metal.” Communicated by W. Wilson, F.R.S.

IV. D. C. Colbourne. 44 The Diurnal Tide in an Ocean Boundedby Two Meridians.” Communicated by G. R. Golds- brough, F.R.S.

[ xiv ]

V. S. Goldstein. 44 The Forces on a Solid Body Moving through Viscous Fluid.” (With notes by J. M. Burgers.) Com­municated by H. Jeffreys, F.R.S.

February 12, 1931.

Sir F. Gowland HOPKINS, President, in the Chair.

The following papers were read :—

I. L. Hogben and D. Slome. 44 The Pigmentary Effector System.” Communicated by H. H. D ale, Sec. R.S.

II. H. Muir Evans. 44 Brains of Cyprinoids and Habits of Feeding.” Communicated by H. H. Dale, Sec. R.S.

III. R. Margaria. 44 The Osmotic Changes in some MarineAnimals.” Communicated by A. V. Hill, F.R.S.

IV. J. B. Cohen, F.R.S., K. Cooper and P. G. Marshall. 44 SomeAliphatic and Aromatic Amino Derivatives of a-Quinoline Methiodide.”

V. C. H. Browning, F.R.S., J. B. Cohen, F.R.S., S. Elling- worth, and R. Gulbransen. 44 The Antiseptic and Trypanocidal Action of certain Styryl and Anil Benz- thiazole Derivatives.”

VI. H. M. Carleton. 44 Studies on Epithelial Phagocytosis, I .” _ Communicated by Sir Charles Sherrington, F.R.S.

VII. W. H. Gray, J. W. Trevan, H. W. Bainbridge, and A. P. Attwood. 44 The Ureides of ^-Aminophenylstipinic Acid.” Communicated by H. H. Dale, Sec. R.S.

VIII. A. Graham. 44 On the Optimum Hydrogen Ion Concentra­tion and Temperature of the Style Enzyme of Pecten maximus.” Communicated by E. J. Allen, F.R.S.

IX. C. S. Hanes and J. Barker. 44 The Physiological Action of Cyanide, I.” Communicated by F. F. Blackman, F.R.S.

February 19, 1931.

Sir F. Gowland HOPKINS, President, in the Chair.

The following papers were read :—

I. A. J. Allmand, F.R.S., and L. J. B urrage. 44 The Discon­tinuous Nature of the Process of Sorption of Gases and Vapours by Porous Solids.”

[ XV ]

II. C. H. Collie. “ The Decay Constant of Uranium II.”- Com­municated by F. A. Lindemann, F.R.S.

III. L. N. G. F ilon, F.R.S., and F. C. Harris. “ The Photo­Elastic Dispersion of Vitreous Silica.”

IV. C. G. D arwin, F.R.S. “ Examples of the Uncertainty Prin­ciple.”

V. P. Kapitza, F.R.S. “ The Study of the Magnetic Properties of Matter in Strong Magnetic Fields. I, II.”

VI. G. B. D eodhar. “ Some Investigations in Rontgen Spectra.” Communicated by 0. W. R ichardson, F.R.S.

VII. J. G. A. Griffiths and R. W. G. N orrish. “ The Photo-sensitised Decomposition of Nitrogen Tetrachloride.” Communicated by T. M. Lowry, F.R.S.

VIII. S. Chapman, F.R.S., and J. M. Stagg. “ On the Variabilityof the Quiet-Day Diurnal Magnetic Variations. II.”

IX. A. Thom and J. Orr. “ The Solution of the Torsion Prob­lem for Circular Shafts of Varying Radius.” Communicated by R. V. Southwell, F.R.S.

X. E. C. Bullard and H. S. W. Massey. “ The Elastic Scatter­ing of Slow Electrons in Argon.” Communicated by Lord Rutherford, F.R.S.

XI. V. C. G. Trew and J. F. Spencer. “ The Magnetic Suscepti­bility of Binary Systems of Organic Liquids.” Com­municated by W. Wilson, F.R.S.

XII. W. G. Kannuluik. “ On the Thermal Conductivity of Some Metal Wires.” Communicated by Lord Rutherford, F.R.S.