Bag from the vat arrives in Sigli where residue is put into two bowls and mixed with quick lime
Mixing residue from vat with quick lime
Tanks and blue barrels
Residue being burned in covered bowl
Residue being burned in covered bowl
Melting to recover a mixture of gold and silver
Sample of the gold and silver mixture recovered
Meltiing copper
Melted copper
Adding the gold-silver mixture
Melting copper, gold, and silver together
Pouring into water
Pouring into water
Pouring into water