Blue vitriol, [16]
Bridge circuit, [255]
Bureau of Standards, [50]
C-battery for tubes, [46], [166];
variation of, [75];
for detection, [66]
Calibration of a receiver, [214]
Capacity, effect upon frequency, [100];
measurement of, [104];
unit of, [104];
variable, [107]
Capacity effects, [243];
elimination of, [228]
Carrier current, modulation of, [146];
telephony, [255]
Characteristic, of vacuum tube, [68], [74];
effect of B-battery upon, [128];
how to plot a, [70]
Characteristic curve of transformer, [64]