Dear Nathaniel:
Perhaps you will remember me from the two years that I was teaching
metallurgy at the Columbia School of Mines, 1955-1957. It was a pleasure
to discover your e-mail address from the mining history mail group. (I'm
unable to help you with information on Wales, however.)
Professor Tom Graedel and I are working on an industrial ecology analysis
of the extent of natural resources now residing in waste deposits. We have
undertaken to look at copper as our first enterprise in this project. When
I asked my colleague Brian Skinner who might be able to help us find data
on the average grade of copper ore smelted through the 20th century, he
suggested that you would be person. What we need for the model calculation
is the mean grade decade-by-decade, 1900 to 1999. If you can suggest a
source, I'd be most grateful.
I'd also be interested in knowing more about the paper you are writing on
electrometallurgy.
Sincerely,
Bob
Robert B. Gordon
Professor of Geophysics and Applied Mechanics
Kline Geology Laboratory
Yale University
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