Nature, "I 

 \jMnc 14, 1900 J 



Index 



iting Flow-actions of Current, Mr, Addenbrooke, 23 ; 

 Kperiments with Lecher's Wehnelt Interrupter, W. Watson, 

 ; Wehnelt's Interrupter, E. Rothe, 48 ; Dr. R. Federico, 

 J. Bacei and O. M. Corbino, 328 ; the Various Patterns of 

 Wehnelt Interrupter, Alfred Turpain, 407 ; Electrolytic 

 iterrupter for Feeble Currents, A. von Rzewuski, 627 ; 

 ith by the Electric Discharge, J. L. Prevost and F. 

 ittelli, 24 ; Transmission of Hertzian Waves through 

 Jquids, Edouard Branly, 47 ; Electrical Motive Power in 

 cks, Harbours and Canals, 60 ; the Course of Electro- 

 rtic Reduction, J. Tafel, 63 ; Contact Electricity, F. S. 

 >piers, 70 ; Theory of Capillary Electrometer, Prof. W. 

 ^mthoven, 72 ; the Niagara Power Station, 85 ; Electrical 

 " juipment of Waterloo and City Railway, B. M. Jenkin, 

 '%t^ ; Glow-light Phenomena with High-frequency Alternate 

 Currents, H. Ebert, 93 ; Electric Pictures, L. Fomm, 93 ; the 

 Macfarlane- Moore Vacuum Tube, J. Elsterand H. Geitel, 93 ; 

 Electrolytic Preparation of Induline Dyes, E. Szarvasy, 94 ; 

 Conductivity of Gas near Incandescent Wire, J. A. McClelland, 

 95 ; Magnetism and Electricity, J. Paley Yorke, 102 ; 

 on the Cause of Dark Lightning and the Clayden Effect, 

 Prof, R. W. Wood, 104 ; Electro-magnets in Steel Works, 

 13s ; the Diurnal Variations of Atmospheric Electricity, 

 A. B. Chauveau, 136 ; Electrical Thawing of Water Service 

 Pip)es, 156 ; Influence of Rontgen Rays on Resistance of 

 Selenium, M. Perreau, 167 ; Negative Electrification of 

 Secondary Rays produced by means of Rontgen Rays, P. 

 Curie and G, Sagnac, 604 ; Marconi Wireless Telegraphy in 

 U.S,A,, 185 ; a History of Wireless Telegraphy, J. J. Fahie, 

 243 ; La Telegraphie sans Fils, Andre Broca, 243 ; Wire- 

 less Telegraphy between Chamounix and Mt. Blanc, Leon 

 and Louis Lecarme, 280 ; Wireless Telegraphy in the War, 

 350 ; Use of new Radio-conductors for Wireless Telegraphy, 

 C. Tissot, 579 ; Moving Bodies in Electric Field, A. 

 Heydweiller, 190 ; Ratio of Electric Charge to Mass in 

 Kathode Particles, S. Simon, 190 ; Origin of Frictional 

 Electricity, C. Christiansen, 190 ; Influence of Becquerel 

 Rays on Electric Sparks, J. Elster and H. Geitel, 190 ; 

 Behaviour of Brush Discharge in Magnetic Field, M. Toepler, 

 190 ; Magnetism and Electricity for Beginners, H. E. Hadley, 

 200 ; Electrolytic Processes in Industry, Dr. W, Borchers, 

 206 ; Effects of Discharges on Heart of Mammals, J. L. 

 Prevost and F. Battelli, 239 ; Constitution of Electric Spark, 

 G, A. Hemsalech and Prof. Schuster, 258 ; Magnetic 

 Deflection of Kathode Rays, E. Wiechert, 262 ; on the 

 Carriers in the Kathode Rays, W. B. Morton, 365 ; Relation 

 between Electric Conductivity and Pressure, G. Tammann, 

 262 ; a Fallacy in Electrical Pressure, E. Lecher, 262 ; Dis- 

 tribution of Free Electricity at Surface of a Crookes' Tube, 

 E, Riecke, 262 ; Photography of Current Curves, J- Zenneck, 

 262 ; Recherches Experimentales sur les Oscillations 

 ^lectriques, A. Turpain, 268 ; Thermo-electric Properties of 

 Mercury, Dr. W, Peddie and A. B. Shand, 286 ; Death of 

 Prof. D, E. Hughes, F.R.S., 302 ; Obituary Notice of, 325 ; 

 new Formula for Ostwald's Dilution Law, Dr. W. D. 

 Bancroft, 303 ; Discharge of Electrified Bodies and Ozone 

 Formation, P. Villard, 311 ; Variation of Resistance of 

 Metallic Wires, H, Chevallier, 311 ; Hall Phenomenon and 

 Thermomagnetic Currents, G. Moureau, 311; Contact 

 Electricity, 332 ; Use of Price's Guard Wire in Insulator 

 Tests, Prof. Ayrton and Mr. Mather, 334; Fault-test for Cable- 

 cores, Mr. Appleyard, 334 ; Reflection and Transmission of 

 Electric Waves along Wires, Dr. E. Barton and L. Lownds, 

 334 ; Electrolysis of Nitrogen Hydrides and Hydroxylamine, 

 E C. Szarvasy, 335 ; Measurement of Capacity in Hetero- 

 geneous Medium, A. A. Petrovsky, 335 ; the Effects of 

 Lightning upon Electric Lamps, Sydney Webb, 343 ; Sir 

 G. G. Stokes, Bart, F.R.S., 343, 413, 539; Prof, R. W. 

 Wood, 391 ; Time of Establishing Electric Spark, H. 

 Abraham and J. Lemoine, 360 ; Improvements in Produc- 

 tion of Electrolytic Copper, S. Cowper-Coles, 371 ; the 

 I'roduction of Electrolytic Copper, Charles H. Lees, 392 ; 

 the Controversy on Volta's Contact Force, Prof. Oliver 

 Lodge, 382 ; Stratifications, H. Pellat, 383 ; Abhandlung der 

 Dynamik, D'Alembert, 390; Ueber die Mathematische 

 Theorie der Eiectrodynamischen Induction, Ricardo Felici, 

 390 ; an Aluminium Cable, 399 ; a Mercury Jet Interrupter, 

 421 ; S, M. Kintner, 590; Atmospheric Electricity, J. Elster 

 and H. Geitel, 422 ; John Aitken, F.R.S., 514 ; Atmospheric 

 Electricity and Disease, Dr. Schliep, Prof, John Perry, 



F.R.S,, 471; Exner's Theory of Atmospheric Electricity, 

 Prof. G. Schwalbe, 546, 554 ; Advancement of Electrical 

 Chemistry, Dr. F. Mollwo Perkin, 428 ; Electric Con- 

 ductivity of Dilute Amalgams, A. Larsen, 432 ; Stationary 

 Temperature of Electrically Heated Conductor, F. 

 Kohlrausch, 432 ; Spark Potential in Gases, A. Orgler, 432 ; 

 the Reversibility of Galvanic Cells, T. S. Moore, 458 ; 

 lonisation of Gases in Electric Field, Prof. J, J. Thomson, 

 458 ; Action of High-tension High-frequency Currents on 

 Tuberculosis, E. Doumer, 459 ; Damping of Galvanometer 

 Needles, M. Solomon, 481 ; Gas-distribution in Electric 

 Field, G. W. Walker, 481 ; Eff'ects of Strain on Thermo- 

 electric Qualities of Metals, Prof. M.Maclean, 481 ; Electrical 

 Thermostat, Prof. J. Gibson and A. W, C. Menzies, 482 ; 

 W, Duane and C. A. Lory, 528 ; Cadmium Cell as Standard 

 of Electromotive Force, Dr. John Henderson, 483 ; Electric 

 Charge of Deviable Radium Rays, M. and Mme, Curie, 483 ; 

 Negative Charge communicated by Radium Rays, Henri 

 Becquerel, 498 ; Deviation of Radium Rays in Electric 

 Field, Henri Becquerel, 555 ; lonisation of Dilute Solution 

 at Freezing-point, W, C. D. Whetham, 504 ; Experi- 

 mental Study of Hertz Exciter, R, Swyngedauw, 507 ; 

 Production of Nitric Acid from Air by Electric Flame, 

 A. McDougall and F. Howies, 507 ; Electrolysis of 

 Potassium Chloride, H, A. Brochet, 508; Syntony, P, E. 

 Shaw, 529 ; Electrical Micrometer, P. E. Shaw, 529 ; 

 Relations between Electrolytic Conductivity and Internal 

 Friction of Saline Solutions, P. Massoulier, 531 ; Unites 

 Electriques absolues. Prof. G. Lippmann, 539 ; Electricity in 

 War, Prof. John Perry, F.R.S., 541 ; Dielectric Constants of 

 Liquid Nitrous Oxide and Nitrogen, Dr, Fritz Hasenoehrl, 

 547; a Vacuum Electroscope, H. Pflaum, 554; Discharge of 

 Statical Electricity from Points, H. Sieveking, 554 ; Electro- 

 static Effects in connection with Vacuum Discharges, J. 

 Stark, 555 ; Electric Wiring, Fittings, Switches and Lamps, 

 W, Perren Maycock, 562 ; Electric Bells and Alarms, F. E. 

 Powell, 562 ; Influence of Heating on passage of Electricity 

 through Rarefied Gases, J. Stark, 572 ; Viscosity of Di- 

 electric Liquids unaffected by Uniform Electrostatic Field, 

 Drs.G.Pacherand L.Finazzi,572 ; the Jungfrau Railway, 572 ; 

 Velocity of Propagation of Electromagnetic Waves in Bitu- 

 men, C. Gutton, 579 ; Influence of Iron on Discharge of 

 Condenser through Induction Coil, G. A, Hemsalech, 579 ; 

 the Elements of Alternating Currents, W, S. Franklin and 

 R. B. Williamson, 587 ; the Action of Electric Tramways on 

 Land End of Submarine Cables, Prof. Andrew Jamieson, 

 595 ; Electro-culture, V, A. Tyurin, 602 ; Electrolytic Esti- 

 mation of Lead in Lead Sulphates and Chromates, C. Marie, 

 604 ; Electric Light Wires and Dust, A. A. C. Swinton, 

 612; Iron Smelting by Electricity, 618; the Relations be- 

 tween Engineering and Electricity, Sir W. H. Preece, 

 F.R.S. ,622; Application of Radio-micrometer to Measure- 

 ments of Short Electric Waves, G. W. Pierce, 626 ; Wave 

 Current Generators, C. Heinke, 626 ; Absorption of Light in 

 Electrically Glowing Gases, M. Cantor, 626; Analysis of 

 Oscillating Discharges by means of Braun Tube, F. Richarz 

 and W, Ziegler, 627 ; Mixture of Three Powders for Produc- 

 ing Electric Dust-figures, K. BUrker, 627 ; Quincke's Rota- 

 tions in Electric Field, L. Graetz, 627 ; Apparatus for 

 Decorating Front of Electricity Section of Paris Exhibition, 

 IVI. d'Arsonval, 628 ; Increases of Resistance in Radio- 

 conductors, Edouard Branly, 628 



Elementary Practical Mathematics, Frank Castle, 53 



Elements of Physics, Henry Crew, Prof. Arthur Schuster, 

 F.R.S., 27 



Elliott (W. J.), Action of Chloroform and Potassium Hydroxide 

 on Orthoamidobenzoic Acid, 264 



Elliptic Elements of the Variable Y Cygni, Prof. N. C. Duner, 



574 

 Elster, (J.), the Macfarlane- Moore Vacuum Tube, 93 ; Influence 



of Becquerel Rays on Electric Sparks, 190 ; Atmospheric 



Electricity, 422 

 Elwes (H. J., F.R.S.), Illustrations of Lepidoptera, 468; 



Bulgarian Lepidoptera, 627 

 Embryology : Merogenic Impregnation, Yves Delage, 24 ; the 



Development of Ganglion Cells and Nerves, N. Goro- 



nowitsch, 158 ; Embryology of Marsupials, J. P. Hill, 400; 



Die Elemente der Entwickelungslehre des Menschen und dec 



Wirbelthiere, O. Hertwig, 610 

 Emden (R.), Resistance to Projectiles in Air, 93 



