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10
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PKEFACE.
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relating to this field will find a full bibliography in the above-mentioned report of Mr. Becker's, published by the U. S. Geological Survey.
Messrs. Xitze and Wilkens have been aided in the preparation of their statement concerning the Haile mine in South Carolina by Mr. A. Thies. Capt. John Wilkes, of the Mecklenburg Iron Works, Charlotte, X. C, has also aided them by the loan of drawings, maps and in other ways. Mr. Geo. B. Hanna, of the IT. S. Assay Office, at Charlotte, N. C, has kindly furnished numerous notes concerning the history of mining and metallurgical methods in the entire South Appalachian region. In behalf of the Survey and of the authors, I desire to thank these gentlemen and many others, in different parts of the region, who have in various ways rendered assistance in the collection and preparation of information for this report. I desire further to thank the editors of The Transactions of the American Institute of Mining Engineers and The Engineering Magazine for permission to use electrotypes of plates prepared for those publications.
One of the existing needs of the Xorth Carolina gold field is the establishment at central points in this region of practical plants that will successfully treat the low-grade sulphuret ores plants that will do custom work at reasonable prices, and where individual miners can ship their ore and be paid for the same according to its value, as is the case in the great mining regions of the AYest.
J. A. Holmes.
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