[D7829ZAU], Letter from M Swan to Thomas Alva Edison, April 6th, 1878

Item

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Title

[D7829ZAU], Letter from M Swan to Thomas Alva Edison, April 6th, 1878

Editor's Notes

Does TAE have an invention that will measure the nuber of vibrations of air per second, ie measure sound -- TAE marg: "Yes the phonogrpah will do this when run by clockwork and with a timing pendulum"

Author

Date

1878-04-06

Decade

1870-1879

Type

Identifier

D7829ZAU

Folder Set

D7829-F

Microfilm ID

18:976

Publisher

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