Letter from J F Hummel to Thomas Alva Edison, May 22nd, 1878

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Author(s)

Hummel, J F
Recipient(s)
Edison, Thomas Alva
Others Mentioned

Subject(s)

Microphone and other acoustic devices
Cylinder phonograph

Dated

1878-05-22 (1878)

Associated Images

1

Identifier

D7801B3E (legacy)

Rights

Thomas Edison National Historical Park

Publisher

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
 

Citation

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