[D7829ZAU], Letter from M Swan to Thomas Alva Edison, April 6th, 1878
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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
Recipient
Date
1878-04-06
Type
Folder/Volume ID
D7829-F
Microfilm ID
18:976
Document ID
D7829ZAU
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University