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Title: Wall telephone using a Blake transmitter, c. 1885. [Go to resource]
Description: Telephone wall instrument (United Telephone Co.) License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: telephone transmitters
transmitters
telephonesTemporal: 1880-1890 Source: Science Museum Creator: United Telephone Company Identifier: http://collectionsonline.nmsi.ac.uk/grab... Go to resource More Like this...
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