Francis Edward and Alexander Stanley Elmore

Quick Facts Francis Edward and Alexander Stanley Elmore were British technologists, joint developers of flotation processes by which valuable ore, such as that of copper, is separated from the worthless material (gangue) with which it is usually extracted from the Earth. In their early days the brothers, with their father, were engaged in the electrolytic refining of copper and in the production of copper tubes. The “bulk oil process,” the first flotation process commercially employed,...