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MINUTER OF MEETINGS OP THE ROYAL SOCIETY. November 4, 1926. Sir ERNEST RUTHERFORD, O.M., President, in the Chair. The following papers were read :— I. “ Experiments on the Production of Large Copper Crystals.” By H. C. H. Carpenter, F.R.S., and S. Tamura. II. “ The Formation of Twinned Metallic Crystals.” By H. C. H. Carpenter, F.R.S., and S. Tamura. III. “ The Distortion of Iron Crystals.” By G. I. Taylor, F.R.S., and C. F. Elam. IV. “ The Metallography of Solid Mercury and Amalgams.” By W. Rosenhain, F.R.S., and A. J. Murphy. V. “ Tensile Tests of Large Gold, Silver and Copper Crystals.” By C. F. Elam. Communicated by H. C. H. Carpenter, F.R.S. VI. “ The Polymorphism of Silicon Dioxide and the Structure of Tridymite.” By R. E. Gibbs. Communicated by Sir William Bragg, F.R.S. VII. “ A Method of Studying the Behaviour of X-Ray Tubes. By R. C. Richards. Communicated by A. W. Porter, F.R.S. VIII. “ Change of Crystal Habit of some Salts when Crystallised from Silicic Acid Gel.” By H. A. Fells and J . B. Firth. Communicated by F. S. Kipping, F.R.S. IX. “ The Effect of Temperature on the Viscosity of Air.” By F. A. Williams. Communicated by H. B. Dixon, F.R.S. X. “ The Number of Particles in (3-Ray Spectra.—II. By R. W. Gurney. Communicated by Sir E rnest Ruther ford, Pres. R.S. XI. “ On the Excitation of Polarised Light by Electron Impact.” By H. W. B. Skinner. Communicated by Sir Ernest Rutherford, Pres. R.S. XII. “ The Mechanism of Activation at Catalytic Surfaces.” By H. S. Taylor. Communicated by E. F. Armstrong, F.R.S. XIII. “ Experiments upon the Reported Transmutation oi Mercury into Gold.” By M. W. Garrett. Communi cated by F. A. Lindemann, F.R.S. [ ii ] XIV. “ Crystal Structure and Chemical Constitution of Basic Beryllium Acetate and its Homologues.” By G. T. Morgan, F.R.S., and W. T. Astbury. XV. “ The Structure and Isotri morphism of the Tor valent Metallic Acetylacetones.” By W. T. Astbury (with Addendum by G. T. Morgan, F.R.S.). Communicated by Sir William Bragg, F.R.S. XVI. “ The Crystal Structure of Meteoric Iron as determined by X-Ray Analysis.” By J. Young. Communicated by S. W. J. Smith, F.R.S. XVII. “ On the Interpretation of X-Ray, S: ugie-Crystal, Rotation Photographs.” By J. D. Ber> o,. Communicated by Sir William Bragg, F.R.S. XVIII. “ On the Total Photo-Electri Emission of Electrons from Metals as a Function of to£ Exciting Radiation.” By S. C. Roy. Communicated bv 0. W. Richardson, F.R.S. XIX. “ An Apparently Unimolecular Reaction—The Homo geneous Decomposition of Gaseous Propionic Aldehyde.” By C. N. Hinshelwood and H. W. Thompson. Com municated by N. V. Sedgwick, F.R.S. XX. “ Note on the Theory of Cuimolecular Reactions.” By C. N. Hinshelwood. Communicated by N. V. Sidgwick, F.R.S. XXI. “ Hydrogen Bands in the Ultra-Violet Lyman Region.” By S. Werner. Communicated by N. Bohr, For. Mem. R.S. XXIT. “ The Initial Stages of the Dehydrogenation and Isomeric Change of Allyl Alcohol.’' By F. H. Constable. Com municated by T. M. Lowry, F.R.S. XXIII. “ The Longitudinal Magi.qto-Resistance Effect in Single Crystals of Iron.” By Yy. L. Webster. Communicated by Sir E rnest Ruthfb ’ord, Pres. R.S. XXIV. “The Scattering of Cathode Rays.” By B. F. J. Schonland. Communicated by Sir Ernest Ruther ford, Pres. R.S. XXV. “ On the Theory of Quantum Mechanics.” By P. A. J\L Dirac. Communicated by R. H. F owler, F.R.S. XXVI. “ Magnetic Double Refraction in Liquids.—I.” By C. V. Raman, F.R.S., and K. S. Krishnan. [ iii ] XXVII. The Properties of Torsional Vibrations in Reciprocating Engine Shafts.—Parts I and II.” By G. R. Golds- broijgh and H. Baker. Communicated by T. H. Havelock, F.R.S. XXVIII. The Distribution of Normal Pressures on a Prolate Spheroid.” By R. J ones. Communicated by H. Lamb, F.R.S. XXIX. I he Band Spectrum of Helium and Hydrogen at Low Temperatures.” By J. C. McLennan, F.R.S., H. G. Smith and C. A. Lea. XXX. The Scattering of Light by the Individual Particles in Smokes.” By H. S. Patterson and R. W. Gray. Communicated by N. V. Sidgwick, F.R.S. XXXI. On the Densities of Ultra-Microscopic Particles.” By H. S. Patterson and R. W. Gray. Communicated by N. V. Sidgwick, F.R.S. XXXII. Theorems concerning Mean Values of Analytic Func tions.” By G. H. Hardy, F.R.S., A. E. Ingham and G. Polya. November 11, 1926. (Joint Meeting with the Royal Astronomical Society.) Sir ERNEST RUTHERFORD, O.M., President, in the Chair. A discussion of the “ Results obtained at the Solar Eclipse of January 14, 1926,” was opened by Sir Frank Dyson, F.R.S. Mr. C. R. Davidson, Mr. F. J. M. Stratton, Prof. Ornstein, Dr. Minnaert and a number of Fellows of the Royal Society and of the Royal Astronomical Society also spoke. , II. The Astronomer Royal communicated drawings of “ The Solar Corona at the Eclipses from 1896 to 1922,” with descriptions. November 18, 1926. Sir ERNEST RUTHERFORD, O.M., President, in the Chair. Sir Douglas Mawson was admitted into the Society. I. “ Reports from the Royal Society’s Kala Azar Commission in China.” By \V. S. Patton and E. Hindle. Communicated by H. H. Dale, Sec. R.S. II. “ The Chemical Nature of Hamiochromogen and its Carbon Monoxide Compound.” By R. Hill. Communicated by Sir Frederick Hopkins, F.R.S. [ IV ] HI. “ The Excretion of Uric Acid by the Kidney.” By H. Gremels and R. Bodo. Communicated by E. H. Starling, F.R.S. IV. “ The Antiseptic Properties of the Amino-Derivatives of Styryl and Anil Quinoline.” By C. H. Browning, J. B. Cohen, F.R.S., S. E llingworth and R. Gulbransen. V. “ The Effects of X-Rays upon Mitotic Cell Division in Tissue Cultures in vitro.'” By T. S. P. Strangeways and F. L. H opwood. Communicated by Sir William H ardy, F.R.S. VI. “ Observations on Concurrent Contraction of Flexor Muscles in the Flexion Reflex.” By Sir Charles Sherrington, O.M., F.R.S., and R. S. Creed. VII. “ The Isolation of some hitherto Undescribed Products of Hydrolysis of Proteins.—Part III.” By S. B. Schryver and H. W. Buston. Communicated by V. H. Blackman, F.R.S. VIII. “ The Action of X-Rays on colpoda.” By J. A. Crowther. Communicated by Sir William H ardy, F.R.S. November 30, 1926. 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 work during the past year was, upon the motion of the President, received. The President delivered his Anniversary Address. On the motion of Sir Charles Close, seconded by Sir Charles Sherrington, the thanks of the Society were voted to the President for his Address, and he was requested to allow it to be printed. The Awards of the Medals for the year were announced as follows, and the Medals were presented from the Chair :— The Copley Medal ...................To Sir Frederick Hopkins. The Rumford Medal ............... ,, Sir Arthur Schuster. A Royal Medal ....................... ,, Sir William Hardy. A Royal Medal ....................... „ Prof. A. V. Hill. The Darwin M edal................... ,, Dr. D. H. Scott. The Davy Medal ................... ,, Sir James Walker. The Hughes Medal ............... ,, Admiral of the Fleet Sir Henry Jackson. [ V ] The President having, with the consent of the Society, nominated Sir Thomas Heath and Prof. A. Harden 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 Ernest Rutherford, O.M., M.A., D.Sc. Treasurer.—Sir David Prain, C.M.G., C.I.E., M.A., LL.D. Sietvrtar'ei— J Mr- James Hopwood Jeans, M.A., D.Sc., LL.D. ' \D r . Henry Hallett Dale, C.B.E., M.A. Foreign Secretary.—Sir Richard Tetley Glazebrook, K.C.B., M.A. Sc.D. Other Members of the Council.—Sir Hugh Kerr Anderson, M.A., M.D.; Dr. Francis William Aston, M.A. ; Prof. Leonard Bairstow, C.B.E.; Prof. Frederick Orpen Bower, Sc.D.; Sir Archibald Edward Garrod, K.C.M.G., M.A., D.M.; Prof. Edmund Johnston Garwood, M.A., Sc.D.; Sir Thomas Little Heath, K.C.B., K.C.Y.O., Sc.D.; Prof James Peter Hill, D.Sc. ; Dr. Peter Chalmers Mitchell, C.B.E., M.A. ; Prof. Robert Muir, M.A., M.D. ; Sir John Herbert Parsons, C.B.E., D.Sc.; Sir Robert Robertson, K.B.E., M.A., D.Sc.; Mr. Alan Archibald Campbell Swinton ; Sir Gilbert Thomas Walker, C.S.I., M.A., Sc.D.; Sir James Walker, D.Sc., LL.D. ; Mr. William Cecil Dampier Whetham, M.A. December 2, 1926. Sir ERNEST RUTHERFORD, O.M., President, in the Chair. The President announced that he had appointed the following to be Vice-Presidents for the ensuing year :— Sir Archibald Garrod. Sir Richard Glazebrook. Sir David Prain. Mr. Dampier Whetham. The following papers were read :— I.