Development Of Communications: From Telegraph To Tv.
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Duration: 10 min.
Year Published: 1955
Creator: Encyclopaedia Britannica Films Inc.
Format: 16mm
Color: B&W
Sound: sound
Description: Shows man's efforts to communicate--devices that have been invented to improve communication, and their effects on the social, cultural, and economic life of the people. The battery, ground connections, electromagnet, telephone, telegraph, cable, wireless, radio and television are illustrated.
Complete Record: DEVELOPMENT OF COMMUNICATIONS: FROM TELEGRAPH TO TV. Encyclopaedia Britannica Films. 10 min., sd., b&w, 16mm. Second edition. With film guide. © Encyclopaedia Britannica Films, Inc.; 27Jun55; MP6533., Shows man's efforts to communicate--devices that have been invented to improve communication, and their effects on the social, cultural, and economic life of the people. The battery, ground connections, electromagnet, telephone, telegraph, cable, wireless, radio and television are illustrated. NOTE: Two (or more) records have been merged together to create this data.
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