Production. Copper. A closeup of a disc-type filter showing how the dried copper concentrate is broken by expansion of the filter and then discharged. This filter unit is at the Arthur plant of the Utah Copper Company

Actual size of negative is C (approximately 4 x 5 inches).
Title and other information from caption card.
Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944.
More information about the FSA/OWI Collection is available at http://hdl.loc.gov/loc.pnp/pp.fsaowi
Film copy on SIS roll 34, frame 89.