Development of Communications

Duration: 11

Year Published: 1959

Creator: Encyclopaedia Britannica Educ Corp

Format: 16mm

Color: B&W

Description: Traces the development of modern methods of communication, including the telegraph, telephone, wireless, and radio. Depicts Morse developing the telegraph by combining the earlier inventions of Volta, Watson, and Henry. Recalls Bell's work on the telephone, and shows Marconi discovering the possibilities of the wireless and DeForest, those of radio. Illustrates the latest developments of wirephoto relay, television, radar and the transistor.

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