The mineralized rock from the picking belts and the minus 4-inch material from the primary crushers went to the gyratory crushers and then to the cone crushers. Plus 1 1/2-inch discharge from the cone crushers went to the roll crushers. This was a roll crusher driven through the belt shown and a similar belt on the opposite side by a pair of 150-horsepower electric motors. It was one of the number 2 roll crushers that crushed to a smaller size material previously crushed in a number 1 roll crusher. The two wheels crushed the material as it passed between them. See picture 6(1-14). Minus 1 1/2-inch discharge from the rolls went to the ball mills.