Volume Information Source: Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, Vol. 81, No. 544 (Jul. 30, 1908), pp. i-vi Published by: The Royal Society Stable URL: http://www.jstor.org/stable/92955 . Accessed: 04/05/2014 18:23 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 130.132.123.28 on Sun, 4 May 2014 18:23:30 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. 81, No. 544 (Jul. 30, 1908), pp. i-viPublished by: The Royal SocietyStable URL: http://www.jstor.org/stable/92955 .
Accessed: 04/05/2014 18:23
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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This content downloaded from 130.132.123.28 on Sun, 4 May 2014 18:23:30 PMAll use subject to JSTOR Terms and Conditions
Lord Kelvin ................... ................................................ iii
(At end of volume.)
No. A 544. July 30, 1908. A Tantalum Wave-detector, and its Application in Wireless Telegraphy and
Telephony. By L. H. Walter, M.A. Communiicated by Dr. J. A. Ewing, C.B., F.R.S ..................................................................... 1
Seleno-Aluminiium Bridges. By Prof. George M. Minchin, M.A., F.R.S. ....... ..... 9
On the Theory of Capillarity. By E. T. Whittaker, Sc.D., F.R.S ......................... 21
Orn the Aberration of Sloped Lenses and on their Adaptation to Telescopes of Unequal Magnifying Power in Perpendicular Directions. By LoLrd Rayleigh, O.M., Pres. R.S .................................................................... 26
The Optical Constants of Gypsum at different Temperatures, and the Mitscherlich Experiment. By A. E. H. Tutton, M.A., D.Sc., F.R.S. .......... .................... 40
The Electrolytic Properties of Dilute Solutions of Sulphuric Acid. By W. C. D. Whetham, M.A., F.R.S., and H. H. Paine, B.A., Triniity College, Cam-bridge ... 58
No. A 545.-August 11, 1908.
Studies of the Processes operative in Solutions.-Parts VI-X. By Prof. H. E. Armstrong, F.R.S., anid others ............................................................... 80
No. A 546.-August 27, 1908.
An Electrical Method of Counting the Nunmber of a-Particles from Radio-active Substances. By E. Rutherford, F.R.S., Professor of Physics, and H. Geiger, Ph.D., John Harling Fellow, University of Manchester ... ........................... 141
The Charge and Nature of the a-Particle. By Prof. E. Rutherford, F.R.S., and Hans Geiger, Ph.D., John Harling Fellow, University of Manchester ....... ..... 162
On the Scattering of the a-Particles by Matter. By H. Geiger, Ph.D., John Harling Fellow, University of Manchester. Communicated by Prof. E. Rutherford, F.R .S ................................................................... 174
A Search for Possible New Members of the Inactive Series of Gases. By Sir William Ramsay, K.C.B., F.R.S .................................................... ..... 178
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The Spectrum of the Lighter Constituenits of the Air. By Herbert Edmeston Watson, B.Sc. (Lond.). Comununicated by Sir William Ramsay, F.R.8 . ......... 181
Aii Investigation of the Heavy Constituenits of the Atm-osphere. By Richard B. Moore, B.Sc. Conmunicated by Sir Williami Ramsay, K.C.B., F.R.S . ............ 195
The Spectrum of Radium Emanation. By Alexander Thomas Cameron, M.A., B.Sc., anld Sir William Ramsay, K.C.B., F.R.S ...................................,..., . 210
Further Note on a Lunminous Glow generated by Electrostatic Induction in an Exhausted Vessel mnade of Silica. By Frederick John Jervis-Snitlh, M.A. (Oon), F.R.S ........ 214
On the Atomic Weight of Chlorirne. By Edward C. Edgar, D.Sc., Assistant Lecturer in Chemistry in the UIJiversity of Manchester. Conmunicated by Prof. H. B. Dixon, F.R.S. (Abstract) .................................................. 216
The Supersaturation and Nuclear Condensation of Certain Organic Vapours. By T. H. Laby, B.A., Emxuanuel College, Cam-bridge, Exhibition of 1851 Science Research Scholar of the Uiniversity of Sydney, Joule Studenit of the Royal Society. Communicated by Prof. J. j. Thoi son, F.R.S. (Abstract) ............ 219
No. A 547.-September 11, 1908.
The Electrical Qualities of Porcelain, with special reference to Dielectric Losses. Bv H. F. Hlaworth, Ph.D., M.Sc., B.Eng., Assoc.M.I.E.E. Communicated by Prof. W. E. Ayrton, F.R.S ..................2..... 221
Note on a New Sounding Machiine for use on1 Lakes and Rivers without a Boat. By E. J. Garwood, M.A., See. Geol. Soc. Com'municated by Prof. T. G. Bonney, F.R.S. . ................................................................................................243
The Viscosity of Ice. By R. M. Deeley, F.G.S. Comrnunicated by Henry Wood- ward, LL.D., F.R.S., F.G.3....S.....................I...........................................250
Vortices in Oscillating Liquid. By Lord Rayleigh, O.M., Pres. R.S ...................... 259
On the Accumulation of Heli-um in Geological Time. By the lon. R. J. Strutt, F .R.S . .......................................................................-..*.....-............... 272
On Heliunm in Saline Minerals, and its Probable Connection with Potassium. By the Hon. R. J. Strutt, F.R.S., Professor of Physics in the Imperial College of Science, South Kensington ................... . . . . . . ....... 278
The Rate of Production of Heliumn from Radium. By Sir Janmes Dewar, M.A., Sc.D., LL.D., F.R.S. . .............................................................. I.......280
Oni the Reflection of Waves from a Stratum of Gradually Varying Properties, with Application to Sound. By J. W. Nicholson, D.Sc., B.A., Isaac Newton. Student, Scholar of Trinity College, Cambridge. Communicated by Prof. J. Larm or, Sec. R.S. ............................................................286
On the Nature of the Streamers in the Electric Spark. By S. R. Milner, D.Sc. (Lond.), Lecturer in Physics, the University of Sheffield. Communicated by Prof. W. M. Hicks, F.R.S. (Abstract) ......299 . , ,. * ............ 29
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Transparent Silver and other Metallic Films. By Prof. Thomas Turner, M.Sc., University of Birmingham. Communicated by Prof. J. H. Poynting, F.R.S. (Plate 1) ....... . . ................................................. 301
The co-Functions, a Class of Normal Fulnctions occurriing in Statistics. By E. Cunningham, M.A., Fellow of St. Johbn's College, Cambridge, Lecturer in Applied Mathematics, University College, London. Communicated by Prof. Karl Pearson, F.R.S .................................................................... 310
Eutectic Research. No. 1.-The Alloys of Lead and Tin. By Walter Rosenhain, B.A., B.C.E., with P. A. Tucker. Communicated by Dr. R. T. Glazebrook, F.R.S. (Abstract) .................................................................... 331
The Spectrum of Scandium and its Relation to Solar Spectra. By A. Fowler, A.R.C.S., F.R.A.S., Assistant Professor of Physics, Imperial College of Science and Technology, South Kensington. Communicated by Sir William Crookes, D.Sc., F.R.S. (Abstract) .................................................................... 336
On the Vapour-pressure and Osmotic Pressure of a Volatile Solute. By H. L. Callendar, M.A., F.R.S., Professor of Physics at the Imperial College of Science and Teclhinology .................................................................... 336
The Emission and Transmiiission of Rontgen Rays. By G. W. C. Kaye, B.A. (Cantab.), B.Sc. (Lond.), A.R.C.Sc., Trinity College, Cambridge. Communlicated by Prof. J. J. Thomson, F.R.S. (Abstract) ................................................ 337
The Boiling-point of Sulplhur on the Constant-pressure Air Thermometer. By N. Eumorfopoulos, B.Sc., Assistanit in the Department of Physics, University College, London. Communicated by Prof. H. L. Callendar, F.R.S. ....... ........ 339
Note on the Boiling-point of Sulphulr. By H. L. Callendar, M.A., F.R.S., Professor of Physics at the Imperial College of Science and Teoliiology ........ ............. 363
On Optical Dispersion Formulae. By Richard C. Maclaurin, M.A., Sc.D., LL.D., Professor of Mathematical Physics, Columbia University in the City of New York. Communicated by Prof. J. Larmor, Sec. R.S. .......... ....................... 367
The Effect of Pressure upon Arc Spectra. No. 2.-Copper, X 4000-4 4600. By W. Geoffrey Duffield, D.Sc. Communicated by Prof. E. Rutherford, F.R.S. (Abstract) .......... . 378
No. A 549.-December 22, 1908. The Actioni of Chlorine uponl Urea whereby a Dichloro Urea is produced. By
Frederick Daniel Chattaway, F.R.S ............................ 381
Note on the Instability of Tubes subjected to Elnd Pressure, and on the Folds in a Flexible Material. By A. Mallock, F.R.S . ................................................ 388
Note on Horizontal Receivers and Transmitters in Wireless Telegraphy. By Prof. H. M. Macdonald, F.R.S .................................................................... 394
The Propagation of Groups of Waves in Dispersive Media, with Application to Waves on Water produced by a Travelling Disturbance. By T. H. Havelock, M.A., D.Sc., Fellow of St. John's College, Cambridge; Lecturer in Applied Mathematics, Armstrong College, Newcastle-on-Tyne. Communicated by Prof. J. Larm or, Sec. R.S .................................................................... '398
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PAGE 'On the Generation of a Luminous Glow in an Exhausted Receiver moving near an
Electrostatic Field, and the Actioni of a Magnetic Field on the Glow so produced; the Residual Gases being Oxygen, Hydrogen, Neon, and Air.- Part 3. By Frederick John Jervis-Smith, M.A. (Oxon), F.R.S ...................... 430
On the Osmotic Pressures of Aqueous Solutions of Calcium Ferrocyanide. Part I.-Concentrated SolutioDs. By the Earl of Berkeley, F.R.S.; E. G. J. Hartley, B.A. (Oxon); and C. V. Burton, D.Sc. (Lond). (Abstract) ............ 434
On Aniomalies in the Intensity in Diffracted Spectra. By H. C. Pocklington, M.A., D.Sc., F.R.S ....... 435
On the Refraction and Dispersioni of Krypton and Xenon and their Relation to those of Heliunm and Argon. By C. Cuthbertson, Fellow of London University, University College; and M. Cuthbertson. Communicated by Prof. F. T. Trouton, F.R.S. ............................................ 440
.Note on Tidal Bores. By Lord Rayleigh, O.M., Pres. R.S . .448
"On a Method of Comparing Mutual Inductance and Resistance by the Help of Two-phase Alternatinig Currents. By Albert Campbell, B.A. Communicated by R. T. Glazebrook, F.R.S. ........................I....................... 450
,,Obituary Notices of Fellows deceased:- P. J. C. Janssen; Thomas Andrews; Lienlt.-Gen. Sir R. Strachey.
(At end of volume.)
No. A 550.-December 31, 1908. "The Occlusion of the Residual Gas and the Fluorescence of the Glass Walls of
Crookes Tubes. By Alan A. Campbell Swinton. Comm-unicated by Sir Willianm Crookes, F.R.S ................ 453
Note on Two recently comnpiled Calendars of Papers of the Period 1606-1806 in the Archives of the Royal Society. By A. H. Church, D.Sc., F.R.S. ............ 460
"The Charges oni Ions in Gases, and the Effect of Water Vapour on the Motion of Negative Ions. By Prof. John S. Townsend, F.R.S ..................................... 464
Measurement of Rotatory Dispersive Power in the Visible and Ultra-violet Regions of the Spectrum. By T. Martin Lowry, D.Sc., Lecturer on Physical Chemistry and Instructor in Crystallography at the Central Technical College. Com- municated by Prof. Armstronig, F.R.S ............................ 472
Results of Magnetic Observations at Stations on the Coasts of the British Isles, 1907. By Commander L. Chetwynd, R.N., Superintendent of Compasses. Communicated by Rear-Admiral A. M. Field, R.N., F.R.S. (Abstract) ......... 475
:Potential Gradient in Glow Disclharges froTn a Point to a Plane. By J. W. Bisphanm, .A'., B.Sc., Research Exhibitioner and former Scholar of Emmaniuel College,
Cambridge. Communicated by Prof. Sir J. J. Thomsoin, F.R.S................ 477
