Pages of a book showing pictures of telephone Transmitter and Receiver exhibited in Centennial Exposition at Philadelphia in 1876. Picture of Dom Pedro, Emperor of Brazil. Dramatization: Alexander Graham Bell greeting Dom Pedro at International Centennial of 1876 in Philadelphia. Actors playing Bell, Pedro and other people walk to see the demonstration. Bell speaks on mouthpiece and Pedro trying to hear Bell's word on receiver. Pedro is surprised and makes other hear the words on receiver. People congratulate Bell.
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