Volta Laboratory and Bureau

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  Volta Bureau building of 1893, a U.S. National Historic Landmark.
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  Photo taken at Volta Laboratory showing a sound recording experiment, 1884.
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  Volta Bureau building of 1893, in Georgetown, Washington, D.C.
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  Another view of the Volta Bureau building of 1893.
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  A Dictaphone Cylinder voice recorder, from a 1917 magazine advertisement.
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  A later-model Columbia Graphophone from 1901, the Precision Graphophone. Price: 110 Francs (image from a French advertisement).