[D7937ZAY], Letter from Spang Chalfant & Co, Norman Spang to Thomas Alva Edison, May 22nd, 1879
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Title
[D7937ZAY], Letter from Spang Chalfant & Co, Norman Spang to Thomas Alva Edison, May 22nd, 1879
Editor's Notes
Pennsylvania man recommends North Carolina muscovite (mica) in telephones; has distinctive metallic ring. Has no material interest in mica and will send samples. Marg: "Ask for cost of 100 sheets of this thickness exact."
Author
Recipient
Date
1879-05-22
Type
Subject
Folder/Volume ID
D7937-F
Microfilm ID
52:58
Document ID
D7937ZAY
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University