Chapter II instrument and measurements

The fundamental electrical standards for the United States are maintained by the National Bureau of Standards. Silsbee¹ describes briefly the d.c. and low frequency standards of resistance, inductance and capacitance. The radio-frequency standards and methods of measurement are described in a separate technical bulletin². Laverick³ surveys the entire field of dielectric measurements, with special reference to the use of pulsed, instead of sinusoidal, voltages. By this means an equivalent circuit for the dielectric under investigation is established, which will hold over a limited frequency range.