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When Mr. Edison heard about the Ortiz Mountain placer gold perched high above available water, he obtained a sample for testing. It was an immediate success. Using his machine in the laboratory, the New Mexico gold was separated from sand without the use of water. Edison signed a 1ease on 54,000 Ortiz acres in January, 1898.
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His electrostatic separator accepted a thin film of dry particles to pass over an electrically charged drum. During the Gold Rush in the Ortiz Mountains southeast of Santa Fe in New Mexico, Edison learned that gold would stick to the drum while sand was repelled, resulting in the first patented a gold concentrator using electrostatic principles.
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Undaunted, Edison poured another $1.5 million into the mine, mill and equipment, announcing to the world in late 1899, "This process for extracting gold from sand is certainly the biggest thing I ever invented. Near Santa Fe, New Mexico is a region of 10 square miles containing gold worth 800 million dollars!" It still didn’t work.
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