Volume Information Source: Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, Vol. 82, No. 551 (Feb. 16, 1909), pp. i-vii Published by: The Royal Society Stable URL: http://www.jstor.org/stable/92962 . Accessed: 08/05/2014 18:41 Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at . http://www.jstor.org/page/info/about/policies/terms.jsp . JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact [email protected]. . The Royal Society is collaborating with JSTOR to digitize, preserve and extend access to Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character. http://www.jstor.org This content downloaded from 169.229.32.137 on Thu, 8 May 2014 18:41:35 PM All use subject to JSTOR Terms and Conditions
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Volume InformationSource: Proceedings of the Royal Society of London. Series A, Containing Papers of aMathematical and Physical Character, Vol. 82, No. 551 (Feb. 16, 1909), pp. i-viiPublished by: The Royal SocietyStable URL: http://www.jstor.org/stable/92962 .
Accessed: 08/05/2014 18:41
Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at .http://www.jstor.org/page/info/about/policies/terms.jsp
.JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range ofcontent in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new formsof scholarship. For more information about JSTOR, please contact [email protected].
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The Royal Society is collaborating with JSTOR to digitize, preserve and extend access to Proceedings of theRoyal Society of London. Series A, Containing Papers of a Mathematical and Physical Character.
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Address of the President, Lord Rayleigh, O.M., D.C.L., at the Anniversary Meeting on November 30, 1908 ................ a ,., ................ I
The Charges on Ions produced by Radium. By C. E. Haselfoot, M.A., Hertford College, Oxford. Comimunicated by Prof. J. S. Townsend, F.R.S. _ ......... ...... 18
A Comparison of the Radium Emanation Spectra obtained by differenit Observers. By T. Royds, M.Sc., 1851 Exhibition Scholar. Communicated by Prof. E. Rutherford, F.R.S ... ..........,...,...... 22
The Extension of Cracks in an Isotropic Material. By A. Mallock, F.R.S. 26,
The Rotation of the Electric Arc in a Radial Magnetic Field. By J. Nicol, B.A., B.Sc., Wheatstone Laboratory, King's College, London. Coinmunicated by Prof. H. A. Wilson, F.R.S . ,. ...... . 29
The Isothermal Layer of the Atmosphere and Atmospheric Radiation. By E. Gold, M.A., Fellow of St. John's College, Cambridge, and Reader in Meteorology. Communicated by Dr. W. N. Shaw, F.R.S . . . 43
Note on the-Effect of Hydrogeni on the Discharge of Negative Electricity from Hot Platiinum. By Prof. H. A. Wilson, F.R.S., Killn's College, London .71
The Yielding of the Earth to Disturbing Forces. By A. E. H. Love, F.R.S., Sedleian Professor of Natural Philosophy in the University of Oxford .73
The Relation of the Earth's Free Precessional Nutatioln to its Resistance against Tidal Deformation. By Prof. J. Larmor, Sec. R.S . . .89
No. A 552.-March 10, 1909.
Notes on Observations of Sun and Stars in some British Stonie Circles. Fourth Note.-The Botallek Circles, St. Just, Cornwall. By Sir Norman Lockyer, Sc.D., K.C.B., F.R.S., Director Solar Physics Observatory.... 96
On the Passage of R6ntgen Rays through Gases and Vapours. By J.- A. Crowther, B.A., Fellow of St. John's College, Cambridge, Mackinnon Student of the Royal Society. Communicated by Prof. Sir J. J. Tlhomson, F.R.S. ........................... 103
On the Velocity of the Cathode Rays ejected by Substances exposed to the y-Rays of Radium. By R. D. Kleeman, B.A., B.Sc., 1851 Exhibition Scholar of the University of Adelaide, and Research Student of Emmanuel College; Emmanlunel College, Cambridge. Communicated by Prof. Sir J. J. Thomsoni, F.R.S .128
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Determinationi of the Surface-tension of Water by the Method of Jet-vibration. By Prof. N. Bohr (Copenhagen). Communicated by Sir W. Ramsay, K.C.B., F.R.S. (Abstract) . .. ,,,.....,,,.....,,,,,,,,,,.....,.... 146
Obituary Notices of Fellows deceased John Kerr; Dr. James Bell, C.B.; R. L. J. Ellery; Spencer Compton
Cavendish, Duke of Devonshire; Colonel Andrew Wilson Baird; William Ashwell Shenstone.
(At end of volume.)
No. A 553.-May 6, 1909.
The Specific Heats of Air and Carbon Dioxide at Atmospheric Pressure, by the Conitinuous Electrical Method, at 20? C. and at 100? C. By W. F. G. Swann, A.R.C.S., B.Sc. Communicated by Prof. H. L. Callendar, F.R.S. (Abstract)... 147
On the Depression of the Filament of Maximum Velocity in a Stream flowing through an Open Channel. By A. H. Gibson, M.Sc. (Vict.). Communicated by Prof. J. E. Petavel, F.R.S. 5 ........................ ..,,, 149
The Photo-electric Fatigue of Zinc.-II. By H. Stanley Allen, M.A., B.Sc., Senior Lecturer in Physics at King's College, London. Communicated by Prof. H. A. Wilsoni, F.R.S ........ , ,.......,,.,.,.,.... 160
The Mobilities of the Ions produced by R6ntgen Rays in Gases and Vapours. By E. M. Wellisch, M.A. (Sydney), Emmanuel College, Cambridge; Barker Graduate Scholar of the University of Sydney. Communicated by Prof. Sir J. J. Thomson, F.R.S. (Abstract) .165
The Leakage of Helium from Radio-active Minerals. By the Hon. R. J. Strutt, F. R.S., Professor of Pllysics, Imperial College of Science, South Kensington ... 166
On the Electricity of Rain and its Origin in Thunderstorms. By George C. Simpson, D.Sc. Comnmunicated by Dr. Gilbert T. Walker, F.R.S. (Abstract) 169
The Telnsion of Metallic Films deposited by Electrolysis. By G. Gerald Stoney. Communicated by the Hon. C. A. Parsons, C.B., V.-P.R.S. . , . , ,,. 172
A Further Note on the Conversion of Diamond into Coke in High Vacuum by Cathode Rays. By Alan A. Campbell Swinton. Communicated by the Hon. C. A. Parsons, C.B., V.-P.R.S .................... 176
The Statistical Form of the Curve of Oscillation for the Radiation emitted by a Black Body. By Prof. Harold A. Wilson, F.R.S., King's College, London . 177
Best Conditions for Photographic Enlargement of Snmall Solid Objects. By A. Mallock, F.R.S ...................... 181
On the Spontaneous Crystallisation of Moniochloracetic Acid and its Mixtures with Naphthalene. By H. A. Miers, F.R.S., and Miss F. Isaac. (Abstract) . 184
Note on the Stability of Jacobi's Ellipsoid. By Sir G. H. Darwin, K.C.B, F.R,S. 188
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On the Wave-lengths of Lines in the Secoindary Spectrum of Hydrogen. By Herbert Edmeston Watson, B.Sc. (Lond.). Communicated by Sir William Ranisay, K.C.B., F.R.S. ................................................................. 189
The Expulsion of Radio-active Matter in the Radium Transformations. By Sidney Russ, B.Sc., Demonstrator in Physics, and Walter Makower, B.A., B.Sc., Assistant Lecturer anid Demonstrator in Physics in the University of Man- chester. Communicated by Prof. E. Rutherford, F.R.S . .............................. 205
An Attenmpt to detect some Electro-optical Effects. By Prof. Harold A. Wilson, F.R.S., King's College, London ............ ............................... 224
No. A 554.-May 26, 1909. Syntonic Wireless Telegraphy; with Specimenis of Large-scale Measurements. By
Sir Oliver Lodge, F.R.S., and Dr. Alex. Muirhead, F.R.S . ........................... 227
Oni the Influence 'of their State in Solution on the Absorption Spectra of Dissolved Dyes. By S. E. Shleppard, D.Sc. (Lond.), late 1851 Exhibition Scholar. Com- muniicated by Sir William Ramsay, K.C.B., F.R.S. .................................... 256
"Dynamnic" Osmotic Pressures. By the Earl of Berkeley, F.R.S., and E. G. J. Hartley, B.A. (Oxon) ............................................ 271
The Wave-making Resistance of Slhips: a Theoretical and Practical Analysis. By T. H. Havelock, M.A., D.Sc., Fellow of St. Joln's College, Cambridge, Lecturer in Applied Mathematics, Armstrong College, Newcastle-on-Tyne. Conmmuni- cated by Prof. J. Larmor, Sec. R.S. ......................................................... 276
Liberation of Helium from Radio-active Minerals by Grinding. By J. A. Gray, B.Sc. (Melbourne). Communicated by the Hon. R. J. Strutt, F.R.S. ............ 301
No. A 555.-June 30, 1909.
An Apparatus for Measurements of the Defining Power of Objectives. By J. de Graaff Hunter, M.A., late Assistant at the National Physical Laboratory. Communicated by R. T. Glazebrook, F.R.S ................................... ............... 307
The Flight of a Rifled Projectile in Air. By Prof. J. B. Henderson, D.Sc., Royal Naval College, Greenwiclh. Communicated by W. Burnside, F.R.S ................5 314
On the Graphical Determination of Fresnel's Integrals. By John H. Shaxby, B.Sc. (Louid.), University College of Southl Wales and Monmouthsbire. Com- nmunicated by Principal E. H. Griffiths, F.R.S. ........................ .................. 331
A Phenomenon connected with the Discharge of Electricity from Pointed Conductors. By Hi. T. Barnes, Macdonald Professor of Physics, anid A. N. Shaw, Demonstrator of Physics, McGill University, Montreal; with a Note by John Zeleny, Professor of Physics, Uniiversity of Minnesota. Communicated by Prof. E. Rutherford, F.R.S. ..................................................... 336
Oii the Effect of Temperatuire on Ionisation. By J. A. Crowther, M.A., Mackinnon Student of the Royal Society, Fellow of St. John's College, Cambridge. Com- municated by Prof. Sir J. J. Thomson, F.R.S ......................................... 351
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The Jonisation in Various Gases by Secondary y-Rays. By R. T). Kleeman, D.Sc. (Adelaide), B.A. (Cantab.), Researchl Student of Emmanuel College, Cambridge. Communicated bv Prof. Sir J. J. Thomson, '.R.S ........................................ 358
Note on a Curious Property of Neoon. By J. Normnan Collie, F.R.S ...................... 378
Note on the Results of Cooling certain Hydrated Platin-Cyanides in Liquid Air. By J. Emerson Reynolds, M.D., Sc.D., F.R.S . ................................. 380
Some Results in the Theory of Elimination. By A. L. Dixon, M.A., Fellow of Merton College, Oxford. Comimunicated by Prof. Love, F.R.S .384
No. A 556.-July 26, 1909.
Utilisation of Energy stored in Sprinlgs for the Produ-ction of Mechaniical Work. By A. Mallock, F.R.S. ........................... 387
The Absolute Value of the Mechanical Equivalent of Heat, in terins of the Inter- national Electrical Units. By Howard T. Barnes, D.Sc., Macdonald Professor of Physics, McGill University, Montreal. Comnmunicated by Prof. H. L. Callendar, M.A., LL.D., F.R.S. . 390
An Approximate Deter-liiiiatioii of the Boiling Poilnts of Metals. By H. C. Greenwood, M.Sc., Beyer Fellow of the University of Manchester. Com- municated by Prof. E. Rutherford, F.R.S . .396
On Electrostatic Induction through Solid Insulators. By Prof. Harold A. Wilson, F.R.S., King's College, Londoin . 409
The Measuremenit of Dielectric Constants by the Oscillations of Ellipsoids and Cylinders in a Field of Force. By W. M. Thornton, D.Sc., J). Eng., Professor of Electrical Engineering in Aranstrong College, Newcastle-upon-Tyne. Com- municated by Sir Oliver Lodge, F.R.S .............................,...,.,.,., 422
Notes concerning Tidal Oscillationis upon a Rotating Globe. By Lord Rayleigh, O.M., F.R.S ................... 448
On a New Kind of Glow from Palladium in Vacuum Ttubes. By Rev. H. V. Gill, S.J., B.A., Downing College, Cambridge. Communicated by Prof. Sir J. J. Thomson, F.R.S. (Plate 1) .................... 464
The Decay of Surface Waves produced by a Superposed Layer of Viscous Fluid. By W. J. Harrison, B.A., Fellow of Clare College, Cambridge. Communiicated by Prof. J. Larnior, Sec. R.S ..................... I , . 477
No. A 557.-July 31, 1909.
The Elastic Limits of Iron and Steel under Cyclical Variations of Stress. By Leonard Bairstow, A.R.C.Sc., Wh. Sch. Commuiiicated by Dr. Glazebrook, F.R.S. (Abstract).......... .. 483
The Ionisation produced by anl a-Particle.-Part I. By H. Geiger, Ph.D., John Harling Fellow of the University of Mainchester. Communicated by Prof. E. R utherford, F.R .S ............ ..........................5........................................... 486
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On a Difftuse Reflection of the a-Particles. By H. Geiger, Ph.D., John Harling Fellow, and E. Marsden, Hatfield Scholar, University of Manchester. Com- minicated by Prof. E. Rutherford, F.R.S. 5 ................................................ 495
The Passage of Electricity through Gaseous Mixtures. By E. M. Wellisch, M.A. (Sydney), Emminanuel College, Cambridge. Communicated by Prof. Sir J. J. Thomson, F.R.S ................................................. I............. 500
The Effect of Pressure on the Band Spectra of the Fluorides of the Metals of the Alkaline Earths. By R. Rossi, B.Sc. Communicated by Prof. Arthur Schuster, F.R.S ................................................................... 518
The Coefficients of Capacity and the Mtutual Attractions or Repulsions of Two Electrified Spherical ConduLctors when close together. By Alexander Russell, M.A., D.Sc., M.I.E.E. Commurnicated by Dr. C. Chree, F.R.S ...................... 524
Oni the Origin of certain Lines in the Spectrun of e Orionis (Alnitam). By Sir Nornman Lockyer, K.C.B., F.R.S., F. E. Baxandall, A.R.C.Sc., and C. P. Butler, A.R.C.Sc., F.R.A.S., F.R.P.S. (Plate 2) ........................................ 532
On Pressure Perpendicuilar to the Shear Planies in Finite PuLre Shears, and on the Lengthening of Loaded Wires when Twisted. By J. H. Poynting, Sc.D., F.:R.S. 546
The Wave Motion of a Revolving Shaft, and a Suggestioni as to the Angular Momentum in a Beam of Circularly Polarised Light. By J. H. Poynting, Sc.D).,R.S .1....................................... 560
No. A 558.-September 18, 1909. The Liquidus Curves of the Ternary System :--Aluminium-Copper-Tin. By J. H.
Andrew, M.Sc., Dalton Scholar, and C. A. Edwards, Research Fellow and Demonstrator in Metallurgy, Yictoria University, Manchester. Com- municated by J. E. Stead, F.R.S. (Plate' 3) ........................................ 568
Sensitive Micro-balances and a New Method of Weighing Minute Quantities. By Bertram D. Steele and Kerr Grant. Conmmunicated by Sir William Ramsay, K .C.B., F.R.S ........................................ 580
The Effect of a Magnetic Field on the Electrical. Conductivity of Flame. By Prof. H. A. Wilson, F.R.S., King's College, London ............................................ 595
Surface Flow in Calcite. By G. T. Beilby, F.R.S ............................................ 599 On the Mechanism of the Absorption Spectra of Solutions. By Robert A.
Houstoun, M.A., Ph.D., D.Sc., Lecturer on Physical Optics in the University of Glasgow. Commnunicated by Prof. A. Gray, F.R.S . ................................. 606
On the Absorption of Homogeneous i3-Rays by Mlatter, alnd on the Yariation of the Absorption of the Rays with Velocity. By W. Wilson, M.Sc., Hatfield Scholar of the University of Manchester. Communicated by Prof. E. Ruitherford, F.R.S ......................................... 612
OBITUARY NOTICES OF FELLOWS DECEASED. Index .... .. xxv
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