This folder contains correspondence and other documents relating to mining and ore milling. Many of the letters were written in response to reports of Edison's interest in developing a separation process for gold ore. Also selected is a 2-page advertisement explaining Edison's "dry placer process for the separation of gold from gravel without the use of water," a process experimentally developed at the West Orange laboratory and tested at the Ortiz Mine in Dolores, New Mexico.
Approximately 15 percent of the documents have been selected. Most of these items received a significant response from Edison. The following items have not been selected: unsolicited letters that did not receive a significant response from Edison, letters enclosing samples of ore or minerals for analysis, and construction specifications for elevators at the New Jersey Zinc Co. works. Also not selected is a 19-page manuscript, undated and unsigned, of a lecture entitled "Edison and Iron."
[D9914AAA], Letter from Thomas J Hurley, Exploration Syndicate to Thomas Alva Edison, February 21st, 1899 1899-02-21