Job Description:

• 1) Tends gas-fired kettle that removes gold, silver, and copper from black mud: Shovels mud into kettle, and turns valve to admit acid until mud is covered.

• 2) Rakes mud to dissolve gold and silver.

• 3) Ladles solution into water-filled settling tank to precipitate gold and silver compounds.

• 4) Removes precipitates and adds reagents to change their chemical composition.

• 5) Heats precipitates in cupola furnace to extract gold and silver.

• 6) Ladles remaining mud into tank filled with water and admits steam to dissolve copper.