None
ScHLOMiLCH, electrolytic detector of, 215 Seibt, a, 173 Short-distance radiotelegraphy, apparatus for, 240, 250 „ „ receiving apparatus, 250 Sigsfield, 179 INDEX Silent diBcharger for electric spark, 59 Singing electrical arc, investigations on the, 92 Siaby, A., 63, 179 Somerfeld, A., 17 Sound fonns, oscillograph records of, by Duddell, 331 Spark apparatus for production of electrical oscillations, 41 „ detectors, 194 „ discharges, 68 „ resistance, experiments on, 62 „ „ measurement of, 326 „ voltages for various spark leugths, 61 Static characteristic of an arc, 94 Stationary oscillations set up on helix, 172 Stone, J. S., 179 Strecker, K., 179 Syntonic circuits, definition of, 34 T. Tantalum oscillation detector, 200 Telegraphic method of detecting electric waves, 230 Telephonic method of detecting electric waves, 230 Telephony, fundamental principles of, 328 Tesla high frequency alternator, 81 Theory of two-coupled circuits, 69 Thermal detectors, 210 „ detector, Fessenden, 212 „ „ Tissot, 211 Thermoelectric detectors, 210 „ detector of Austin, 215 Duddell, 214 „ „ Fleming, 213 „ „ Klemencic, 213 Time period of oscillatory electric circuits, 29, 33 Tissot, C, 211 Thomson, Elihu, 91 Tosi, A., 187 Transatlantic radiotelegraphy, first attempts at, 266 „ „ Marconi's establishment of, 268 Transformation of continuous currents into electric oscillations, 92 Transformers for radiotelegraphy, 54 Turbine mercury interrupter, 50 U. Undamped oscillations, production of, from continuous currents, 92 „ electric oscillations, 81 Upson, W. L., researches on the characteristic curves of electric arcs, 102 V. Valve oscillation detectors, 218 Varieties of radiating and receiving circuits, 148 Velocity of an electromagnetic wave, 136 „ of light, experimental determination of the, 141 „ of undulation through the cether, 141 359 36o lA'DEX W. Walter, L. H., 220 ,, magnetic detector of, 208 Wave length, measurement of, 313 „ „ of waves radiated from an antenna, 178 „ motion, theory of, 125 „ nature of a, 125 „ production of a, 126 „ velocity, formula) for, 127 Wehnelt, A., 52 Wertheim-Salomonson, 96 Wien, M., 17, 76 Wilson, E. 202 Wireless exchange, Marconi system, 268 ZEN19ECK, J., 179 PRINTBD IN GREAT BRITAIN BY WILLIAM CLOWES AND SONS, LIMITED, BEOOLES. i 610^0520^25 lii III nil HI niiiiiiiiiiiiiiiMiiii b89090S20925a This book may be kept FOURTEEN DAYS A fine of TWO CENTS will be charged for each day the book is kept overtime. ^10 D $2 UO'55 260c'35 ' i'.:m '.9 M Ho. 39 UB I s. fl^rnDS^mes B89090520925A r t. 