[D7919O], Letter from Johnson Matthey & Co to Thomas Alva Edison, February 7th, 1879
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Title
[D7919O], Letter from Johnson Matthey & Co to Thomas Alva Edison, February 7th, 1879
Editor's Notes
Sends sample of 30% iridium; hope to get to 40% or 50% but cost "of labor and destruction of tools will be enormous."
Author
Recipient
Date
1879-02-07
Type
Folder/Volume ID
D7919-F
Microfilm ID
50:21
Document ID
D7919O
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University