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Thomas Edison with Tin-Foil Phonograph at the studio of Mathew Brady. In Washington DC Edison demonstrated his Tin-Foil (420428f290f5492ab7d9a46e2f945e6f).jpg - BMacZeroBot

Thomas Edison "and his speaking phonograph before the National Academy of Science," Charles Batchelor at right. Taken at the (5b4521a08ad1453d9c99f1e517f609a7).jpg - BMacZeroBot

Thomas Edison "and his speaking phonograph before the National Academy of Science," with Uriah H. Pointer, left, and Charles (5cfd434ba0b04383a18cb35919e213b6).jpg - BMacZeroBot

Thomas Edison with Tin-Foil Phonograph at the studio of Mathew Brady. In Washington DC Edison demonstrated his Tin-Foil (c3be7b36d42d4eb0bd88dd11c89325e7).jpg - BMacZeroBot

Thomas Edison with Tin-Foil Phonograph at the studio of Mathew Brady. Edison demonstrated his Tin-Foil Phonograph to the (ccb5bd96430e424cbe03c49e2b6e8cb8).jpg - BMacZeroBot