![0022:0185: US Bureau of Mines Collection - C-675-BC A Filter In Operation: This is one of two-disk 6-foot filters set side by side. The product is shown here is a "middling" for use in the leaching plant. This particular material does not filter well and is sent through a dryer before going to storage. [dup. of 0022:0069]](https://d8e7jbdw4fu0e.cloudfront.net/4452/817f2f90-d0dd-11ee-9b06-71c46f11a432-wyYK6pJ.lg-nt@2x.jpg)
US Bureau of Mines Collection - C-675-BC A Filter In Operation: This is one of two-disk 6-foot filters set side by side. The product is shown here is a "middling" for use in the leaching plant. This particular material does not filter well and is sent through a dryer before going to storage. [dup. of 0022:0069]