THE HISTORY OF THE TELEPHONE

On March 10 1876 A.G.Bell ___ the telephone.

• spoke

• discussed

• invented

He kept a notebook about his ___ with the telephone.

• experiments

• principles

• instruments

Someone who helps a scientist with his work is a/an ___.

• nurse

• assistant

• technician

A telephone is a ____ that conveys sound over a distance.

• mechanics

• device

• transmission

Convey means ___.

• carry

• create

• confirm

• pigeon signal

• mirror signal

• smoke signal

• jungle mirrors

• jungle drums

• semaphore

• carrier dove

• carrier sparrow

• carrier pigeon

The electrical ____ needed to build a telephone were known in 1831.

• principles

• values

• beliefs

In 1854 Bourseul suggested ___ speech electrically.

• sending

• talking

• transmitting