' "'.' 2'. ": 'f : : - ' . " ' A Fr.-; - vet ' v ; FLOTATION CELLS Where the ore is recovered as copper contrate. After leaving leav-ing the flotation cells, the concentrate is sent to the "pachuca tanks" and rfom there to settling tanks, where the leaching process takes over, resulting in 85 to 90 recovery. Below, the assay office, where Boyd Horton, assayer, and assistant Bud Barnes keep tabs on the recovery at each stage of the milling process. t I .hiiiiJ St , ! ! 1 1 1 ' ' ' T A