The resonance method of wave-form analysis

The paper describes briefly the principles of the resonance method of wave-form analysis. A short account is included of the other methods of analysis that are available, and a historical résumé of the resonance method is give. The desirability of basing the analysis on a measurement of the voltage across the inductance coil in the resonance circuit is demonstrated from theoretical and practical considerations. The most suitable form of analyser is described and the advantages of the thermionic voltmeter for this prupose are indicated. A selection of the results obtained are included to to illustrate the applications of the method.