None
[Anon.] The General Electric Co.'s Three-Phased Apparatus. Ibid., 581. DUNCAN, J. D. E. Proof of Two-Wattmeter Method of Mea- suring Three-Phase Power. Ibid., 763. FRIESE, R. M. Die Vorgange im Gleichstromanker bei Entnahme von Wechsel- und Mehrphasenstromen. Elek. Zeitsch., xv. 101. Alternate Currents from Continuous Currents. Elec. World (N.Y.), xxiii. 373, 468, 615. LUNT, A. D. Measurement of the Power of Polyphased Cur- rent. Ibid., 771, 804, 832. Appendix. 239 1894 [Anon.] Stanley Elec. M. Co. Two-Phased System for Light- ing and Power. Ibid., 815. KENNEDY, Rankine. Alternate Current Motors. Elec. Review ', xxxv. 156, 318, 651. ESSON, W. B. Monophase Motors. Ibid., 317. [Anon.] Duncan's Alternate Current Meter. Elec. Review (N.Y.), Sept. 19, 1894. DERI, M. Herstellung eines Drehfeldes durch Einphasen- Wechselstrome. (One to Three-phase Transformer.) Zeitsch. fiir Elektr., xii. 377 ; Elec. Zeitsch. xv. 353; Elec. World, xxiv. 82. [Anon.] STANLEY and KELLY. Alternating Current System. Elec. Review (N.Y.), xxiv. 285. BEHN-ESCHENBURG. Theory of Alternate Current Motors. Elek. Zeitsch., Mar. 29 and May 17, 1894. Polyphase from Single Phase. Elec. Zeitsch., Jan. 1894. BOUCHEROT. Transport de force. La Lum. fclec., Hi. 301, 369. Distribution de force et e'clairage par courants polyphase's aux ateliers Weyher et Richemond. Bull. Soc. Internat. des Electriciens, Dec. 1894. HUTIN and LEBLANC. Transformation re'ciproque des courants continus en courants alternatifs, &c. L felectricien, April 2ist, 1894. STEINMETZ, C. P. Multiphase Motors. Elek. Zeitsch., Jan. 25, 1894. POTIER, A. Sur les Moteurs a induit ferme' sur lui-meme. Bull. Soc. Internat. des &lec., May 1894. [Anon.] ImhofFs New System for Distribution. LEcl. E., i. 688 j Elek. Zeitsch., xv. 638. BLONDEL, A. Inductance des Lignes aeriennes pour courants alternatifs. E&d. E., i. 393. JULLIG, Max. Ueber die Gestalt der Kraftlinien eines mag- netischen Drehfeldes. Akademie der Wissenschaften in Wien, July 1894. HEYLAND, A. Ein graphisches Verfahren zur Verausberech- nung von Transformatoren und Mehrphasenmotoren. Elec. Zeitsch., xv. 561. 240 Polyphase Electric Currents. 1894 ARNO, R. Retardation or the Polarisation in Dielectrics. Electrician, xxxiv. 327. LAHMEYER. W. Regelung von Drehstromanlagen, &c. Elek. Zeitsch., xv. 675. [Anon.] Polymorphe Generatoren und Transformatoren. Ibid., 307. BEHN-ESCHENBURG. Vermehrung der Zahl der Erregerphasen zur Erzeugung rotirender magnetischer Felder. Ibid., 35. GOERGES, H. Ueber das Anlassen der Elektromotoren, speciell der Drehstrommotoren. Ibid., 644. KOLBEN, E. Asynchrone Wechselstrommotoren fur hohe Spannung. Ibid., 597. STUART-SMITH. Instrument for Measuring Phase Difference. Elec. World (N.Y.), xxiii. 172. HOSPITALIER. Generateurs et Transformateurs polymor- phiques. Soc. fran$aise de Physique, May 18, 203. JACQUIN, CH. Transmission de force motrice par courants polyphase's aux ate'liers du Jura-Simplon. La Lum. Elec., lii. 10, 73. 1895 DE BAST, Discours inaugural. [Theory of Asynchronous Polyphase Motors.] Bull. Assoc. des Ingenieurs Electriciens , vi. 30, March 1895. WEINHOLD, A. Electricitatswerk der Stadt Chemnitz. Elek. Zeitsch., 1895, Heft i ; Electrician, xxxiv. 464. FISCHER, L. Berechnung von Mehrphasenstromanlagen. Elek. Zeitsch., 1895, Heft 6 and 7. GOERGES, H. Vergleichende Betrachtungen iiber die Wirth- schaftlichkeit des Einphasen- und des Mehrphasenstromes. Elek. Zeitsch., 1895, Heft 3. CAHEN, H. Zur rechnerischen Bestimmung der Mehrphasen Motoren. Elek. Zeitsch., xvi. 52; Electrician, xxxv. 265. STEINMETZ. On Complex Quantities [Mathematical Theory applied to Polyphase]. Official Rep. of Proc. of Electrical Congress at Chicago, 1893, 68. SCOTT, C. F. On Tesla Polyphase System. Ibid., 417. DUNCAN, L. Multiphase Motors and Power Transmission. Ibid., 411. Appendix. 241 PERRY, N. W. The Tesla Two-phase System. Electricity (U.S.A.), viii. 169, 185. [Anon.] Trial of a Tesla Motor. Ibid., May 15. [Anon.] The Monocyclic System. Elec. World (N.Y.), xxv. 182; Lfccl. &lec. Hi. 152. BELL, L. The Monocyclic System. Nat. Elec. L. Assoc., Feb. 1895 > Elec- Review (N.Y.), xxvi. 120. [Anon.] Niagara To-day. Elec. Eng. (N.Y.), Jan. i5th, 1895. JANET, P. Me'thode d'Inscription e'lectrochimique des Courants alternatifs. Bull, de la Soc. Internationale des Electriciens, Jan. 1895. LEGRAND, L. Calcul d'un moteur asynchrone a champ mag- ne'tique tournant. L'£cl. £., Jan. i9th, 1895. JULIUS and STEELS. Transport d'dnergie par courants poly- phase's des carrieres de M. Wincqz, a Soignies. Bull. Assoc. des Ingenieurs felectriciens, March and April 1895. BRAGSTAD. Untersuchung eines Drehfeldes. Elek. Zeitsch., xvi. 112. WHITWELL, A. Theory of Three-phase Generators. Elec. Review, xxxvi. 768. EBORALL, A. C. Single-phase Alternate-current Motors. Elec. Review, xxxvi. 722, 738, 789. MERSHON, R. D. Output of Polyphase Generators. Elec. World, xxv. 684. APPENDIX II. SCHEDULE OF SOME BRITISH PATENTS BEARING ON POLYPHASE AND ALTERNATE-CURRENT MOTORS. 1891 Hutin & Leblanc Dobrowolsky Siemens & Halske Stanley & Kelly Siemens & Halske Siemens & Halske  Tesla 6527 Dobrowolsky ... ... ... I0933 Tesla ... 19420 Tesla ... ... 19426 Dobrowolsky ... I95S5 1890 Wenstrom ... .. ...  10613 H473 12046 Appendix. 243 No. 1891 Dobrowolsky Brain & Arnot Bradley, Taylor & McDonald Tesla Siemens & Halske Stanley & Kelly 13627 16099 16709 18890 20604 1892 Siemens & Halske ... 360 Stanley & Kelly 7504 Siemens & Halske ... ... ... *3543 Hutin & Leblanc .. ... ... 13765 Stanley & Kelly 14056  1893 Rice 510 Bradley ... ... 1621 Lundell & Johnson  Currents. No. 1895 Devonshire (for Gen. El. Co.) ... 2914 Devonshire „ „ ... 2915 Devonshire „ „ ... 2916 Devonshire „ „ ... 2917 Devonshire „ „ ... 2918 Ferraris and Arno ... ... ... 11227 INDEX. References are in many cases given in footnotes in the text ; ivhen not so given the original source may be found in the Bibliography (Appendix /.). Names in the Bibliography are also for convenience included in the Index ', even in cases where the bibliographical entry is a mere reference. PAGE ADVANTAGES of Polyphase Generators 21 Allgemeine ElektricitHts-Gesellschaft^ Frankfort Transmission 105, 106 „ „ „ Motors, Efficiency of .. 205 „ „ „ Inductor  with 154  Efficiency Tests by 208 „ his Patent on Electrostatic Hysteresis 235 Arnold, E 143,225,234,215 Aron, Dr. H., Polyphase Meter 189,220 „ „ on Measurement  246 Polyphase Electric Currents. B. PAGE Babbage and Herschel, Experiments on Magnetic  Project 237 Baily, Walter, First Induction Motor 84,226 Baltimore Station  " Alternating Currents of Electricity" .. .. 10 Blondel,A 171,239 „ and others, Patent of .. ... 243 Blathy,O .. .. 230,233  by 208 Boys, C. Vernon (see also Guthrie and Boys} .. .. .. .. 226 Bradley,  Coil 23,25  , .. .. ... 39 Index. 247 PAGE Brown, Boveri &• Co., Alternators of 35 „ „ „ Motors of .. .. .. .. 21 1 et seq. Brown, C. E. L 229,232,234 „ „ Designs Lauffen Generators .. .. .. 27 „ „ Designs Hochfelden Generators .. .. 39, 211 „ „ Introduces " Umbrella " Type of Machine .. 37 „ „ his Designs for Niagara Plant .. .. .. 39 „ „ Experiments on Motor Design   Rotor 122 „ Patent 242 Coil for producing Rotatory Field 81 Coils, Breadth of 23, 2$ „ Overlapping of .... .... 35 Colladon, Experiments on Magnetic  Polyphase Currents .. .. .. .. 43,49 „  of Polyphase 53 Core-disks 32, 113 Core of  196 „ „ of Monophase Motor 164,165 Current in Stator 151,152,190 Curve, Characteristic, of Motor 142 „ „ Monophase Motor .. .. .. 163, 164 D. Danielson, Experiments with Asynchronous Generators ..  M. von .. .. 228, 229, 232, 234, 236, 237 „ „ „ on Comparative Output of Machines 21 ,» » » Researches 102 „ „ „ Motors 102,107 „ „ „ Patents 242,243 Rotor 122 „ „ „ Three-phase Lamps .. .. .. 53 „ „ „ on  „ 71., Motor 174 „ „ Polyphase Meter 189 „ „ Patent 243 E. Ebert, Construction   Monophase Motor .. .. .. 168 „ „ Field in Monophase Motor .. .. .. 168 Emperor Wilhelm  Experiments with Rotating Magnetic Field 78 250 Polyphase Electric Currents. F. PAGE Faraday^s Discovery of Induction Currents .. .. .. 2,226 „ Researches in Magnetic Rotations .. .. .. 72, 75, 226 Farman .. .. 233, 235 Ferraris, Prof. Galileo, Researches of .. 88, 143, 227, 236, 237 „ „ „ Theory of Monophase Motors .. .. 161 „ „ „ Patent of 243 Ferranti- Wright  Elec. Co. (U.S!), Asynchronous  39 ,, „ Browrfs .. 32,35?37>42 „ „ Brush Co: s (Mordey]  17 » » Niagara 39 „ „ Oerlikon Co.'s 33,39 Schonenwert 37 Stanley .. .,. 35 "Umbrella "Type .. 37 „ „ Westinghouse 34,4° Wynnes 19 Geraldy, F. 229 German Emperor contributes to Lauflen-Frankfort Transmission no Goerges, H. 21, 57, 228, 232, 233, 234, 236, 239, 240 „ „ on Copper required in different Systems .. .. 57 „ „ on Comparative Output  Patent 242 Gordon, J. E. H., Two-phase Alternator ..  Electric Currents. Holes in Core Disks ........ 32,36,113,119,195 Hols, 0  „ „ on Polymorphic Machines ...... 185 Hutin and Leblanc ...... 143, 228, 231, 235, 237, 238 99 » Patents of .......... 242, 243 j? „ Theory of Monophase  Rankinc 229,231,234,238 „  Dr., Experiments on Lauflen- Frankfort Transmission .. no Killwangen, Plant at 211 Kolben, Emit 235, 239 „ „ on Starting Torque 198 „ „ Table of Efficiencies 203,204 Kollert 233 Korda, Dtsire1, Transformer 182, 236, 237 Kratzkart 235, 236 L. Lag  Lindley, W. H., Experiments on Lauffen-Frankfort Transmission no Liquid Resistances 198, 220  232 Lundell &• Johnsons Patents 243 Lunt 238  Lauffen Transmission ..  Motor of 164,165 „ „ Starting  ,.  Miscellaneous ** .. ... .* «.  Generator 33,39 „ „ Machines .. .. .. 105, 106 „ „ List  Olivetti^C. .. .. 235 Oppositely Rotating Vectors .. 162 256 Polyphase   6 „ of Poles 6 Pittsfield,  at 171 Potter, A 239  Conductor in Alternating Field .. .. .. ..154 Resistance in Rotor, Introduction of .. .. .. 125,140,198 „ „ Effect of 197 Resultant Magnetic Flux 134., 137, 146 „ of several Magnetic Fields .. .. .. .. 58 ef seq. Retardation of Polarity 173 Rice's Patent 243 Ries 235 Ries Electric^ S. Co.'s Patent  Ryan). S. Sahulka, Dr. J. 143, 225, 229, 232, 233, 235  to Three-phase Transformer   Chemnitz Station .. .. .. ..217 „ „ Machines  Fields .. .. .. ..  240 „ „ " Monocyclic " System ..  Moving  .. . .. ^etseq. Patents of 93,100,242,243 „  .. -.155 Thomson, Prof. Elihu .. .. 227, 228, 234 „ „ Experiment of .. 154 „  Electric Currents. PAGE Three-phase System, Saving in Copper in ........ 53 „ Transformers .. .. .. ... .. .. 177  One- to Two- or Three-phase .. .. .. ..182 „ Three-phase from Continuous Current .. .. .. 81  LIMITED, STAMFORD STHEKT AMD CHARING CROSS. Plate I X-. ' Plate II LIST OF BOOKS BY PROF. SILVANUS P. THOMPSON, D.Sc., B.A., F.R.S. DYNAMO-ELECTRIC MACHINERY, A MANUAL FOR STUDENTS OF ELECTROTECHNICS. Fifth Edition, Revised, with numerous Plates and Illustrations, Demy $>vo, cloth. THE ELECTRO-MAGNET AND ELECTRO-MAGNETIC MECHANISM, Second Edition, with numerous Illustrations, Demy 8vo, cloth, 151. POLYPHASE ELECTRIC CURRENTS AND ALTERNATE CURRENT MOTORS. With numerous Illustrations and Plates, Demy Sv0, cloth, I2S. 6d. PHILIP REIS : INVENTOR OF THE TELEPHONE. 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