Congress of 1893, Report of the Sub-Committee on Provisional Pro- gramme for the International Electrical .1, 401 Continuous and Alternating Currents, The Action of, on Fuse Metals...251 Control of Electric Energy, A New Method for the 437 Cost of Steam and Water Power, Discussion, Emery on 484 Cost of Steam Power Produced with Engines of Different Types under Practical Conditions; with supplement relating to water power Council, Report of, for the Year Ending April 30. 1893 234 Counter, An Automatic Printing Speed, for Dynamo Shafting 331 Currents, Continuous and Alternating, Action of on Fuse Metals 251 D'Arsonval Galvanometer. A Modified Deprez 270, 489 Deprez, D'Arsonval Galvanometer, A Modified 270, 489 Dielectrics, Note on the Disruptive Strength of 85 Discussion, Electrical Congress 363, 404. 431 Discussion, Emery on Cost of Steam and Water Power (L. B. Still- Disruptive Strength of Dielectrics, Note on the..'. 85 Distribution of Membership, Geographical 707 Dynamo Shafting, An Automatic Printing Speed Counter for 331 Early Dynamo, An (Townsend Wolcotf) 166 Economical Age of Incandescent Lamps, The Most 65 Economy of the Steam Engine due to Variation in Load, Variation in. .297 Electric Conduit Railways, The Practicability of 631 Electric Energy, A New Method for the Control of 437 Electric Notation, Abbreviations and Symbols 401 Electrical Congress and World's Fair of 1893 International 464 Electrical Congress Discussion 363, 404, 431 Electrical Congress of 1893, Report of the Sub-Committee on Provi- Electrical Recording Meters (Caryl D. Haskins) 29 Electrical Resonance. Practical Aspects of Low Frequency 370 Electricity in Medicine. A Brief Glance at 555 Emery on Cost of Steam and Water Power. Discussion 484 Energy, A New Method for the Control of Electric... 437 Frequency. Electrical Resonance, Practical Aspects of Low 370 Fuse Metals, Action of Continuous and Alternating Currents on 351 Galvanometer. A Modified Deprez D'Arsonval .. .270, 489 Geographical Distribution of Membership 707 Glance at Electricity in Medicine, A Brief 555 Green, Dr. Norvin, Death of 109 Green, Dr. Norvin, Obituary 665 Heating of Armatures (A. H. and C. E. Timmerman) 336 Hedgehog Transformer and Condensers (Frederick Bedell, K. B. Miller and O. F. Wagner) 497 Hospitalier's Proposed Notation, On 427 Impedance (A. E. Kennelly) 175 Incandescent Lamps, The Most Economical Age of ... .65 Institute, Monthly Meetings of 528 International Electrical Congress and World's Fair of 1893 (Edwin J. International Electrical Congress of 1893, Report of the Sub Committee on Provisional Programme for the 1, 401 Lamp-;, The Most Economical Age of Incandescent ti."i Load. The Variation in Economy of the Steam Engine, due to Varia- Local Meetings. Report of Committee on 628 Low Frequency Electrical Resonance, Practical Aspects of 870 Medicine, A Brief Glance at Electricity in 555 Meeting, Annual (1893) 238 Meetings of the Institute, Monthly ... 528 Meetings, Report of Committee on Local 023 Membership, Catalogue of 069 Membership, Geographical Distribution of 707 Metals, Action of Continuous and Alternating Currents on Fuse 251 Meters, Electrical Recording 29 Method for the Control of Electric Energy, A New 437 Modified Deprez D'Arsonval Galvanometer, A (C. D. Parkhursf) 27u, 4*9 Monthly Meetings of the Institute {Ralph W. Pope) 528 Most Economical Age of Incandescent Lamps (Carl Hiring) 65 Names for Units 8 New Method for the Control of Electric Energy, A (D. AfcFarlan, Moore) 437 Notation, Abbreviation and Symbols, Electric 401 Notation Proposed by M. Hospitalier On the (Alex. Macfarlane) 427 Note on the Disruptive Strength of Dielectrics (C. P. Steinmetz) 85 Obituary. Dr. Norvin Green 665 George B. Prescott. Jr 060 Anthony Reckenzaun 607 Papers, Subjects of Special 11 Practical Aspects of Low Frequency Electrical Resonance (M. I. Pupin) 370 Practicability of Electric Conduit Railways, The (Albert Stetson) 031 Prescott, George B., Jr., Death of 109 Prescott, George B , Jr. Obituary.. .. 666 Printing Speed Counter for Dynamo Shafting, An Automatic 331 Programme for the International Electrical Congress of 1893, Report of the Sub-Committee on Provisional. 1. 401 Provisional Programme for the International Electrical Congress of 1893, Report of the Sub-Committee on 1, 401 Railways, The Practicability of Electric Conduit. 631 Recording Meters, Electrical 29 Reckenzaun, Anthony, Obituary 007 Report of Committee on Local Meetings 623 Report of Committee on Uncompleted Work of Congress 495 Report of Council for the Year Ending April 30, 1893 .234 Report of the Sub-Committee on Provisional Programme for the Inter- national Electrical Congress of 1893 1, 401 Resonance. Practical Aspects of Low Frequency Electrical 370 Siemens, Dr. Werner von. Death of 109 Special Papers, Subjects of 11 Speed Counter. An Automatic Printing, for Dynamo Shafling 331 Steam and Water Power. Emery on Cost of. Discussion 484 Steam Engine, Variation in Economy of, due to Variation in Load 297 Steam Power, Produced with Engines of Different Types under Practical Conditions; with supplement relating to water power, Cost of. .119 Strength of Dielectrics. Note on the Disruptive 85 Sub-Committee on Provisional Programme for the International Electrical Congress of 1893, Report of the 1, 401 Subjects of Special Papers 11 Symbols, Electric Notation, Abbreviations and 401 Symbols, Notation and 5 Table. Copoer Wire 668 Tellers' Report 359 Transformer and Condensers, Hedgehog 497 Treasurer's Report 287 Units, Names for 3 Units, New 2 Variation in Economy of the Steam Engine due to Variation in Load (Ji. C. Carpenter) 2Sf7 Water Power, Cost of 143 Water Power, Emery on Cost of Steam and, Discussion 484 Wire Table. Copper 668 World's Fair of 1893, International Electrical Congress and 4M NOTICE. The Institute as a body is not responsible either for the statements made, or for the opinions expressed, in the following pages. Mcilkoy & Emmrt, Steam Printers, 36 Cortlancit St., New York. TRANSACTIONS OF THE AMERICAN INSTITUTE OF Vol. X. January To December, 1893. REPORT OF THE SUB-COMMITTEE ON PROVISIONAL PROGRAMME FOR THE INTERNATIONAL ELECTRICAL CONGRESS OF 1S93. To the General Congress Committee of the American Institute of Electrical Engineers: Gentlemen:—The Sub - Committee on Provisional Programme respectfully submits to you the following report: DUTIES. The Sub-Committee understands its duties to be as follows: To suggest what work it is desirable to have done at the coming International Electrical Congress to be held in Chicago in 1893. To suggest a programme for carrying out this work in the most satisfactory manner to all parties, and with the least loss of time. RECOMMENDATIONS. Regarding the work to be done, your Committee's recom. mendations are as follows: RATIFICATIONS. (1.) Ratification of the adoption of units, terms, symbols and definitions by previous International Electrical Congresses. This is a mere matter of form and an act of courtesy to the preceding Congresses. Your Committee understands that this was done at both the Paris Congress of 1889 and the Frankfort Congress of 1891. (For the work done at previous Congresses see Appendix I.) NEW UNITS. (2.) Defining and adopting practical units for measuring and designating the measurements of the following quantities: Magneto-motive force; magnetic flux; magnetic intensity; magnetic reluctance; electric conductivity / illumination. It will be noticed that this refers only to the question of what the magnitude of the units shall be, or, in other words, what multiples or sub-multiples of the absolute units they are to be. Your Committee is aware that objections are raised by some, to the establishment of units not already in universal use. Past experience, however, has shown that the proper time to establish units is before their need is universally felt, in order to avoid the introduction by different persons or nations, of units of different values, a contingency which will be very likely to arise if not anticipated by concerted action. Your Committee recommends the following: The value of the practical unit of magneto-motive force to be one-tenth of the absolute unit, that is, equal to -7- ampere turn. The value of the practical unit of magnetic flux to be 108 absolute units or lines. The value of the practical unit of magnetic intensity to be 108 absolute units, that is, 108 lines per square centimetre. The value of the practical unit of reluctance to be 10-* absolute units. (For further explanation of these magnetic units see Appendix II.) The value of the practical unit of electrical conductivity to be 10-9 absolute units, that is, to the reciprocal of the ohm. This makes it equal to the unit proposed some time ago and known to some extent by the name of " mho." It should be given this value in order that it correspond with the already adopted units. The value of the practical unit of illumination to be a bougiedecimale at the distance of one metre. The bougie-decimale is the unit of light or candle power already established and is practically equal to one English standard candle; by making the distance a metre, the practical unit will be approximately equal to one-tenth of a carcel-metre, one-tenth of a foot-candle (or "lux ") or to one metre-candle or metre-kerze, all three of which units are already in use to some extent. It has been announced that a proposition will be made at this Congress to change the values of some of the practical units |