 During the early 1870s, he traveled to copper mines in Chile and Ore Knob, North Carolina to introduce the Hunt & Douglas process.In 1874, he introduced an improvement on the Hunt-Douglas process at J. Oscar Stewart's quartz mill in Georgetown, Colorado to also recover silver.In 1890, he hired the young Dr. L. D. Ricketts, one of the brightest metallurgists of his generation, to introduce the Hunt Douglas process in Arizona.