The Telephone

Part I of Essay
itself is a rather simple appliance. A microphone, called the transmitter, and an earphone, called the receiver, are contained in the handset. The microphone converts speech into its direct electrical analog, which is transmitted as an electrical signal; the earphone conve ....

Part II of Essay
.... than ever before. It became possible to set up meetings and discuss business matters with partners thousands of miles away. Companies that posessed a telephone had a enormous advantage over the rest. And in a time as economically troubled as the 30's depression, everyone was looking for a competitive edge. The telephone wasn't invented in the thirties, nor was the first transatlantic line built then, but the thirties represents a time in history when the world was changing incredible fast and much of that change was made possible ....