[LB012433], Letter from Thomas Alva Edison to Robert M Galbraith, May 25th, 1882
https://edisondigital.rutgers.edu/document/LB012433
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Title
[LB012433], Letter from Thomas Alva Edison to Robert M Galbraith, May 25th, 1882
Editor's Notes
I have examined the one you sent me and find it contains about 60% of carbonate of copper 15 ounces of silver per ton. The [hard] other like substances that you ground on a stone is a double oxide of copper and iron.##This is a splendid ore if you have plenty of it. It can be worked right on the spot with a Dynamo machine and steam engine. What is the price of steam coal per ton delivered at Rawlings
Author
Recipient
Date
1882-05-25
Type
Folder/Volume ID
LB012-F
Microfilm ID
81:732
Document ID
LB012433
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University