Roller Mills
in the griffin mill, there is a single roller suspended in a similar way to the rollers in a huntington millhe roller is about 18 inches in diameter, and rolls on the inside of a die ring 30 inches in diametert takes material up to 1 inches in diameter, and crushes either wet or dryt does not appear to be used anywhere either as an amalgamator or to prepare ore for amalgamation, but.