31. Give formula for capacity reactance and the meaning of the symbols.
32. Which American cities are joined by underground lines at present?
33. State the two practical ways of improving telephone transmission.
REVIEW QUESTIONS
ON THE SUBJECT OF TELEPHONY
PAGES 63—141
1. On what general principle are most of the telephone transmitters of today constructed?
2. Make sketch of the new Western Electric transmitter and describe its working.
3. Make sketch and describe the Kellogg transmitter.