o] 



Index 



ungswelt, Herman Graf Kevserling, 4; John Dee (11^7- 

 1608), Charlotte Fell Smith', Sir Edward Thorpe, C.B., 

 F.R.S., 121; Proceedings of the Aristotelian Society, 

 Prof. A. E. Taylor, 155 ; Space and Spirit, R. A. Ken- 

 nedy, 486 



Photography : Formula for Sensitising Plates for tht 

 Extreme Red, Gargam de Moncetz, 119; Uber Farben- 

 photographie und verwandte naturwissenschaftliche 

 Fragen, Prof. Otto Wiener, 185 ; Photography of Marine 

 Animals, Dr. Francis Ward, 257 ; the British Journal 

 Photographic Almanac, 1910, 277; Nature Photography 

 for Beginners, E. J. Bedford, 371 ; Photographic Survey- 

 ing from Balloons, Captain Scheimpflug, 439 ; Photo- 

 graphic Observations of tj Aquilas, A. Kohlschiitter, 500 



Photometry : the Photometric Measurement of the Obliquity 

 Factor of Diffraction, C. V. Raman, 69 ; Physiological 

 Principles underlying the Flicker Photometer, j' S. Dow, 

 146 ; Standard Measurement in Wave-lengths of Light, 

 Dr. A. E. H. Tutton, F.R.S., 338 



Photo-micrography, Elementary, Walter Bagshaw, J. E. 

 Barnard, 97 



Photo-telegraphy : Recent Work in the Telegraphic Trans- 

 mission of Pfetures, T. Thorne-Baker, 309 



Phthisis and Insanity, on the Inheritance of the Diathesis 

 of. Dr. Charles Goring, 204 



Physics : the Refractivity of Radium Emanation, Prof. 

 Alfred W. Porter and Clive Cuthbertson, 7; the Atomic 

 Weight of the Radium Emanation, Frederick Soddy, 188 ; 

 the Small Motion at the Nodes of a Vibrating String, 

 C. V. Raman, 9; High-pressure Spark Gap in an Inert 

 Gas, Rev. F. J. Jervis-Smith, F.R.S., 9; Modified Form 

 of Favre and Silbermann Calorimeter, Dr. H. Schotlky, 

 18 ; Converting a Celluloid Copv of a Diffraction Grating 

 into a Reflecting Grating, Drs. E. Gehrcke and G. 

 Leithauser, 18 ; Emission of Gases by Heated Metals, 

 G. Belloc, 29 ; an Introduction to Physical Science, Dr. 

 F._H. Getman, 35; an Elementary Course in Practical 

 Science, C. Fo.xcroft and S. J. Bunting, 35 ; a New Baro- 

 graph, T. Shida, 45 ; Cooling of the Air in a Liquefying 

 Apparatus, W. P. Bradley and C. F. Hale, 4,:; ; Cadmium 

 Amalgams and the Weston Normal Cell, F. E. Smith, 

 58; Physical Society, 58, 146, 177, 476, 508; Experi- 

 ments at High Temperatures and Pressures, Richard 

 Threlfall, F.R.S., at Royal Institution, 82 ; a Compound 

 Pendulum of very Simple Construction giving immedi- 

 ately the Length of the Synchronous Pendulum, H. 

 Pellat, 89 ; the Frigorific Recuperation of Volatile Liquids 

 lost in various Industries, Georges Claude, 90 ; Harmonic 

 Vibrations and Vibration Figures, J. Goold, C. E. Ben- 

 ham, R. Kerr, and Prof. L. R. Wilberforce, Prof. C. V. 

 Boys, F.R.S., 96; Discontinuities in Light-emission, 

 N. R. Campbell, 118 ; Theory of the Motion of a Charged 

 Particle through a Gas, Sir J. J. Thomson, 118; Vapour 

 Pressure of an Electrified Liquid, M. Gouy, 119; 

 "Savants du Jour," Henri Poincar(5, 139; Desiccation of 

 Air before Liquefaction, Georges Claude, 149 ; Conditions 

 Necessary for Platinum to Remain in a State of Incan- 

 descence in a Bunsen Burner, Jean Meunier, 149 ; 

 Osmotic Pressure in Plants and on a Thermo-electric 

 Method of Determining Freezing Points, Prof. Henry H. 

 Dixon and W. R. G. Atkins, 148; the Maintenance of 

 Forced Oscillations of a New Type, C. V. Raman, 156, 

 428 ; the Terminal Velocity of Fall of Small Spheres in 

 Air, Prof. John Zeleny and'L. W. McKeehan, 158; Edith 

 A. Stoney, 279 ; Velocity of Steady Fall of Spherical 

 Particles through a Fluid 'Medium, E. Cunningham, 419; 

 the Motional Effects of the Maxwell .-Ether-stress, E. 

 Cunningham, 176; Effective Resistance and Inductance 

 of a Helical Coil, Dr. J. W. Nicholson, 177; Ductile 

 Materials under Combined Stress, W. A. Scoble, 177 ; 

 Studies on very Short Electro-magnetic Waves, H. 

 Merczyng, 178 ; Results of Re-measurement of the Mag- 

 netic and Electrical Properties of Steel Rods made Glass- 

 hard and then Tested by Prof. Barus in 1885, Laura L. 

 Brant, 200 ; Advantages of Using Calcium Carbide as a 

 Drying Material in Electrostatic Instruments, Dr. T. 

 Wulf, 200 ; the New Physics, Sound, Joseph Battell, 

 216; Experimental Foundations of the Atomic Theorv, 

 Werner Mecklenburg, 227; the Physical Society's Exhibi- 

 tion, 234 ; the Wimperis Accelerometer, 234 ; an Accelero- 

 metcr, A. P. Trotter, 234 : Gas-Icakage Indicator, 234 ; 



Daylight Illumination Photometer, A. P. Trotter, 234; 

 Application of Abraham's Rheograph to Throw on 

 the Screen a Hysteresis Loop, 234; Ur. C. V. Drysdale's 

 Slip Meter, 234; Dr. C. V. Drysdale's Potentiometer 

 for Alternating Currents, 234 ; Radium Collector for 

 Atmospheric Electricity, F. Harrison Glew, 234; Appara- 

 tus for Transmitting Photographs Electrically, T. Thorne- 

 Baker, 234 ; Direction of Motion of the Electrons Ejected 

 by the a Particle, R. D. Kleeman, 237 ; Conduction of 

 Heat through Rarefied Gases, F. Soddy and \. J. Berry, 

 237 ; Waves in a Dispersive Medium resulting from a 

 Limited Initial Disturbance, G. Green, 239 ; .Arrange- 

 ment for the Determination of very Small Differences of 

 Pressure, A. Lafay, 239 ; Death of Dr. Shelford Bidwell, 

 F.R.S., 224; Obituary Notice of, 252; Improved 

 Stormer Viscosimeter, 258 ; Motion of an Electrified 

 Sphere, Prof. \. W. Conway, 270 ; the Ether of Space, 

 Sir Oliver Lodge, F.R.S., 271 ; the Heat Developed 

 during the Absorption of Electricity by Metals, Profs. 

 O. W. Richardson and H. L. Cooke, 278 ; on Fluores- 

 cence Absorption, J. Butler Burke, 279; Death and 

 Obituary Notice of Prof. J. S. H. Pellat, "287 ; Re-deter- 

 mination of the Constant of Stefan's Law, MM. Bauer 

 and Moulin, 178, 291 ; the Constant in Stefan's Law and 

 the Radiation of Platinum, Edmond Bauer and Marcel 

 Moulin, 389 ; New Modification of the Cloud Method 

 of Measuring the Elementary Electrical Charge, Prof. 

 R. \. Millikan, 291 ; Influence of a Magnetic Field on 

 the Damping of Light Vibrations, Jean Becquerel, 299 ; 

 Preparation of Thin Films by Volatilisation in a Vacuum, 

 L. HouUevigue, 299 ; .Application of the Ultra-microscope 

 to the Study of the Phenomena of Electrolysis, Dr. J.J. 

 Kossonogow, 318; Degree of Completeness of the Cir- 

 cular Polarisation of magnetically divided Lines, Prof. 

 Zeeman, 319; Lord Kelvin's Early Home, Mrs. Eliza- 

 beth King, 331; Electrons, Prof. W. Wien, 346; Cal- 

 culation of Sizes of the Particles Shot off from a Silver 

 Kathode in a Vacuum Tube, L. HouUevigue, 346 ; Fre- 

 quency Meter Constructed from the Designs of Com- 

 mandant Ferris and on a Small Precision Balance Con- 

 structed by M. CoUot, J. Carpentier, 359 ; Upper-air 

 Temperatures Registered Outside and Inside Balloons, 

 W. A. Harwood, 366 ; Death of Prof. F. Kohlrausch, 

 373 ; Obituary Notice of, 402 ; Measurements of the 

 Brownian Movements in Emulsions of Gamboge and 

 of Mastic, Jean Perrin, 376; Contributions to the 

 Theory of Screws, Sir Robert S. Ball, 389; Electric 

 Cohesion of Neon, E. Bouty, 3S9 ; Initial Accelerated 

 Motion of Electrified Systems of Finite Extent 

 and the Reaction produced by the Resulting Radia- 

 tion, G. W. Walker, 418 ; Svante .Arrhenius zur Feier 

 des 25-jahrigen Bcstandes seiner Theorie der elek- 

 trolytischen Dissociation gewidmet von seiner Freunden 

 und Sqhulern, Prof. James Walker, F.R.S., 401 ; Gas- 

 washing Bottles with a very Slight Resistance to the 

 Passage of Gas, Dr. .A. C. Cumming, 420 ; the Vapour 

 Pressures, Specific Volumes, Heats of Vaporisation and 

 Critical Constants of Thirty Pure Substances, Prof. S. 

 Young, 448 ; Laws of Evaporation, P. Vaillant, ^40 : 

 Systematic Error in the Determination of the Mean Level 

 of the Sea by the Medimaremeter, Ch. Lallemand, 440 ; 

 the Meaning of " lonisation," Prof. Henrv E. Arm- 

 strong, F.R.'S., 45S, 487; Prof. James Walker, F.R.S., 

 4i;8 ; Death of Prof. H. Dufour, 46J : Work of the 

 Physical Society, Dr. Chree, 464 ; Saturation, Specific 

 Heats, &c., with van der Waals's and Clausius's Charac- 

 teristics, R. E. Baynes, 476 ; Propagation of a Disturb- 

 ance in a Fluid under Gravity, F. B. Pidduck, 476 ; 

 Polarisation of Dielectrics in a Steady Field of Force, 

 Prof. Thornton, 477 ; the Use of Mutual Inductometers, 

 \. Campbell, 477 ; Variation of the Inertia of the Elec- 

 tron as a Function of the Velocity in the Kathode Rays 

 and on the Principle of Relativity, C. E. Guye and S. 

 Ratnovsky, 479 ; Emission of Electric Charges by the 

 Alkaline Metals, Louis Dunoy^r, 470 ; L'Electricit(5 con- 

 sid^r^e comme Forme de I'Enerfiie, Lieut. -Colonel E. 

 Aries, 484 : Lehrbuch der Physik, E. Grimsehl, j8j ; 

 Elements of Physics for Use in High Schools, H. Crew, 

 484 ; Light, Prof. R. C. Maclaurin, 484 ; the Flow of 

 Sand, A. S. E. .Ackermann, 487; Charles E. S. Phillips, 

 4S7 ; Secondary Cells in Tropical Climates, Prof. E. P. 



