Sulphuric acid, [22]
Super-heterodyne, [242];
advantages of, [242]
Telephone receiver, [130];
theory of, [131]
Telephone transmitter, [142]
Telephony, by wire, [253]
Tickler coil, [182]
Transcontinental telephone line, [261]
Transmission, essential operations in, [230]
Transmitter, Arlington, [233];
continuous wave, [94], [119];
for high power, [233]