Photo of two wilfley tables at the Yellowjacket Mill. Notice the bucket used to catch gold, bottom left. Materials ran down the trough from the first wilfley table to the second wilfley table.
Phots shows the lower level of the Yellowjacket mill. Ore was dumped beside the mill, then washed into a trough that fed into the trommel screen. The trommel discharged onto the wilfly table which caught the free gold.
Ball mill at the Bradley Mine mill at Stibnite in Valley County, Idaho circa 1940. This photo gives a close up view of the ball mills which are used to crush ore. The opening and trough where crushed ore exits the mill is clearly shown in the...