Telephone

Telephone is the most imortant thing in the world. Telephone was invented by the American scientist Graham Bell in 1876. To-day the telephone is used in many countries. In the countries of Europe and America, it is one of the necessities of life. People of those countries would fell great inconvenience without the telephone. In our country, it is a sort of luxury : only a few rich persons have telephones in their houses.
The telephone is worked by electricity. Different telephone sets are connected by wires. Sound is carried through these wires by electric current. A telephone set has a receiver with two parts, one for hearing and the other for speaking. If we want to speak to a person, we hold the receiver and dial his telephone number. The person hears the call and holds the receiver. Then we can speak to him.
The telephone is very useful to us. We can talk to a person without going to his place. It is specially useful to busy people. It saves time. They can at once get information about many matters. If there is any accident, we can inform the police in no time. If there is any crime, we can the police many matters. If there is any accident, we can ring the hospital for an ambulance car and send the injured person to the hospital. If there is an outbreak of fire, we can immediately inform the Fire Brigade. We can transact different kinds of business with the help of the telephone. We also do a lot of work sitting at home.
Some towns have telephonic connections with other towns. So a person in one town can speak to a person in another town. For this purpose, one has to ask the Central Exchange to give connection. This is called trunk call.