SnppUineHt to Natnre,~\ 

 June I, 1893 J 



Index 



XV 



Gradation Committee, 613 ; Technical Education, Dr. 

 W. Anderson, 155 ; Industrial School opened at 

 Lucknow, III; Technical Education Conference, 130; 

 Technical Education in London, Report of the 

 London County Council Committee, 300 ; Technical 

 Education in Birmingham, Sir Henry Roscoe, 301 ; 

 the Slojd Association of Great Britain, 324 ; the London 

 County Council and Technical Education, 348 ; Report of the 

 Scottish Technical Education Committee, 543 ; the Univer- 

 sities and the County Councils, 586 ; the Cambridge Univer- 

 sity Extension Movement, 586 ; Improvement in City Guilds 

 and London Institute Technological Examinations, 612 



Egg Collecting, Col. Duthie, 253 



Eggs, Artificially Incubated, W. Whitman Bailey, 200 



Eggs, Study of the Form of. Dr. Nicolsky, 253 



Egypt : Appointment of W. Flinders Petrie to Chair of 

 Egyptology, University College, London, iii ; Prof. Flinders 

 Petrie's First Lecture, 278 ; Egyptian Figs, Rev. George 

 Henslow, 102, 152 1 the Causes of the Defertilisation of, 

 E. A. Floyer, 156 ; Ancient Egypt, Prof. Flinders Petrie, 

 301 ; Earthenware Manufacture in, W. de Morgan, 613 ; 

 Egyptian Mumoiies, Prof. Macalister on, 623 



Eichhi Iz (A.) on Urobilin, 360 



Eigenmann (C. H.), The Fishes of Southern California, 61 



Elasticity, a Treatise on the Mathematical Theory of. A, E. H. 

 Love, Prof. A. G. Greenhill, F.R.S., 529 



Electricity: Remarkable Case of Electricity in a Cat, 17; an 

 Arc Light between Mercurial Electrodes in Vacuo, Dr. Arons, 

 24; Displacements of a Magnet on Mercury under Action of 

 Electric Current, D. Decharme, 48 ; Cost of Electric Supply, 

 Dr. John Hopkinson, F.R.S.,38; Power of Hydrogen- 

 absorption of Various Metals, Herren Neumann and Streintz, 

 (>}, ; an Automatic Interruptor for Accumulators, H. Ebert, 

 69 ; Institution of Electrical Engineers Annual Dinner, 85 ; 

 Demonstration by Means of Telephone of Existence of Inter- 

 ference of Electric Waves in Closed Circuits, R. Colson, 96 ; 

 New Mirror Electrometer for High Potentials, Dr. He)d- 

 weiler, 112; Electric Oscillations, Pierre Janet, 119; Electrical 

 Standards, 128 ; Value of Electric Light for Lettuce and other 

 Winter Crops, Prof. L. H. Bniley, 130; Domestic Electric 

 Lighting Treated from the Consumer's Point of View, 



E. C. De Segundo, 172 ; Electric Lighting and Power Dis- 

 tribution, W. Perren Maycock, 269 ; Gas Power for Electric 

 Lighting, J. Emerson Dowson, 284 ; the Distribution of 

 Power by Electricity from a Central Generating Station, A. 

 Siemens, 378 ; Ionic Velocities, W. C. D. Whetham, 164 ; ! 

 the Velocity of Crooke's Cathode Stream, Lord Kelvin. \ 



F. R.S., 164; Experiments in Electric and Magnetic Fields, ' 

 Constant and Varying, Rimington and Wythe Smith, 165 , 

 Mr. Swinburne, 166 ; Prof. S. P. Thompson, 166 ; the i 

 Utilisation of Niagara Falls for Generating Electricity, 182 ; ! 

 Improvement on the Herz Oscillator, MM. Sarasin and De la I 

 Rive, 184 ; a New Electric Furnace, H. Moissan, 192 : I 



P. Janet, 432 ; a Magnetic Screen, Frederick J. Smith, 439 ; 

 the Effects of Mechanical Stress on the Electrical Resistance 

 of Metals, James H. Gray and James B. Henderson, 478 ; 

 the Use of the Electric Current in producing High Tempera- 

 tures, MM. Moissan and Violle, MM. Lagrange and Hoho, 

 497; Electrical Actinometer used by Messrs. El ter and 

 Geitel in Measurement of Sun's Ultra violet Radiation, 422 ; 

 Ready Preparation of Large Quantities of the more Refrac- 

 tory Metals by means of the Electric Furnace, M. Moissan, 

 424 ; the Tereco and Electric Cables, Sir Henry Mance, 

 450; Intense and Rapid Heating Process by means of the 

 Electric Current, MM. Lagrange and Hoho, 503 ; Photo- 

 graphic Registration Apparatus, Dr. Rap«, 503 ; Electro- 

 magnetic Waves, 505 ; Electrical Papers, Oliver Heaviside, 

 505 ; Apparent Attraction of Closed Circuits by Alternating 

 Magnetic Pole, Prof. Elihu Thomson, 517 ; the Physiological 

 Effects of Electric Currents of High Frequency, M. d'Arson- 

 val, 517; Penetration of thin Metallic Plates by Cathode Rays 

 causmg Phosphorescence, Herr Lenard, 518 ; a New Electri- 

 cal Process permitting the Production of Temperatures Su- 

 perior to those Actually Realisable, Eug. Lagrange and P. 

 Hoho, 535 ; Equipottntial Lines due to Current Flowing 

 through Conducting Sheet fixed Photographically, E. Lommel, 

 544 ; on Initial Capacities of Polarisation, M. E. Bouty, 552 ; 

 Experiments on Phosphorescence-producing Kathode Kays of 

 a Geissler Tube, Dr. P. Lenard, 564 ; Electrical Railways, 

 Dr. Edward Hopkinson, 570 ; on the Differential Equation 

 of Electric Flow, T. H. Blakesley, Prof. Perry, Prof. O. J. 

 Lodge, Dr. Sumpner, Mr. Swinburne, 574 ; a Method of 

 obtaining Alternating Currents of Constant and easily-deter- 

 mined Frequency, I. Pupin, 586 ; Experiments on Loss of 

 Electrical Charge of Bodies in diffuse Light and in Darkness, 

 Edouard Branly, 586 ; the Recordingof Earth-currents, 586 ; 

 Dynamo-electric Machinery with Compound Excitation, M. 

 Paul Hoho, 599 ; Experiments on Electric Oscillations of 

 Medium Frequency, M. Janet, 615: Researches into ihe 

 Study of Hall's Phenomenon, Prof. Kundt, 624 



Elgar (Dr.), the Strength of Bulkheads, 520 



EUii'ger (Dr.), New Method of Preparing Glycol .\ldehyde, 17 



Elliott (W. R. ), Earthquake in Dominica, 562 



Ellis (W. ), Map Showing Lines of Equal Magnetic Declination 

 for Jan. I, 1893, in England and Wales, 323; Relation be- 

 tween the Duration of Sunshine, the Amount of Cloud, and 

 the Height of the Barometer, 431 



Elster and Geitel (Messrs.), Apparatus for Demonstrating Dif- 

 ference of Potential at Poles of Galvanic Cell, 233 ; Electrical 

 Actinometer used in Measurement of Sun's Ultra-violet 

 Radiation by, 422 



Embryology ; on a Supposed Law of Metazoan Development, 

 J. Beard, 79 



Emmons (Hamilton) on the Petrography of the Island of 

 Capraja, 334 



Energy, the Identity of. Prof. Oliver Lodge, F.R.S., 293 



Apparatus for Demonstrating D.fference of Potential at j Energy and Vision, Prof. S. P. Langley, 252 



Poles of Galvanic Cell, Messrs. Elster and Geitel, 233 ; Con 

 struciion of Copies of Permanent Standard Mercury Resist- 

 ances, 233 ; the Temperature of the Electric Arc, J. Violle, 

 240 ; Electric Currents in Plants, Prof. Burdon Sanderson, 255; 

 on Thermo-electric Phenomena between two Electrolytes, 

 Henri Bagard, 263 ; on the Origin of the Electric Nerves in 

 the Torpedo, Gymnotus, Mormyrus, and Malapterurus, 

 Gustav Fritsch, 271 ; Pure Gases Incapable of Producing 

 Electrification by Friction, Mr. Wesendorck, 280 ; on the 

 Temperature Coefficient of the Electrical Resistance of Mer- 

 cury and on the Mercury Resistances of the Imperial Insti- 

 tution, Dr. Kreichgauer and W. Jaeger, 286 ; Electric Oscil- i 

 lations in Wires, Direct Measurement of the Moving Wave. : 

 Kr. Birkeland, 286 ; Magnetism and Electricity, R. W! i 

 Stewart, 315 ; the Growth of Electrical Industry, W. H. 

 Preece, F.R.S., 327; Sarasin and De la Rive's Experi- 

 ments in Measurement of Rate of Hertz Electric I 

 Waves, Prof. Raoul Pictet, 336 ; Rotation of Cylin- | 

 der by Inductive .\ction, Signor Arno, 374 ; Observa- 

 tions of Atmospheric Electricity in America, T. C. 

 Mendenhall, Prof. Oliver J. Loflge, F.R.S., 392; on the 

 Electric Figures produced at the Surface of Crystallised 

 Bodies, Paul Jannetaz, 408 ; on Electric Spark Photographs, 

 or Photography of Flying Bullets, &c., by the Light of the 

 Electric Spark, C. V. Boys, F.R.S., 415, 440; Hysteresis 

 and Dielectric Viscosity of Mica for Rapid Oscillations, M. 



Engineering : Institution of Mechanical Engineers, 19, 300, 

 353j 617 ; Mechanical Engineering, Report on the Value of 

 the Steam Jacket, J. G. Mair-Burnley, Col. English, Mr. 

 Day, Bryan Donkin, Prof. Unwin, Bryan Donkin, Jun., Mr. 

 Morrison, and Mr. Schonheyder, 20 ; the Screw Propeller, 

 Messrs. Walker, Kennedy, Barnaby, Dunell, and Shield, 21 ; 

 Junior Engineering Society, 38 ; Institution of Electrical En- 

 gineers, Annual Dinner, 85 ; Modern Mechanism, 241 ; a 

 Correction, 281 ; Mechanical Engineering, the .\pparatus 

 at the Haslar Experimental Works, R. E. Froude, 353 ; the 

 Southampton Water-softening Plant, William M.itthews, 354 ; 

 the Foundations of the Two River Piers of the Tower Bridge, 

 E. E. W. Crettwell, 545 ; the Value of Annealing Steel, E, G. 

 Carey, 397 ; Der Nord-Ostsee-Kanal, C. Beseke, 579 ; 

 Steam Engine Triah, 594 ; the Alloys Research Committee, 

 Second Report, Prof. W. C. Roberts- Austen, F.R.S., 617; 

 the Action of Bismuth on Copper, Prof. W. C. Roberts-.\usten, 

 F.R.S.,6i8 



England, .American Opinion of Photography in, Xanthus Smith, 

 86 ; the Progress of Cremation in, 396 ; the English Flower 

 Gardens, W. Robinson, 508 



Engler's (Dr. A.) " Botanische Jahrbiicher flir Systematik, 

 Pflanzengeschichte und Pflarzengeographie," 413 



English (Col. ) Experiments on the value of the Steam-jacket, 20 



Entomology ; Remarl able Hornet's Nest presented to Madras 

 Museum by Lord Wenlock, 16; anew species of Bely tidas from 



