Paul O. Abbe Ball Mill, appears to be Model 8-A, measures 24" diameter X 30" long, rated for 59 Gallon capacity, 8 cubic feet. Previously used as dry grind mill to process precious metal scrap into a 70 mesh material. Last used with timer control panels so that the units would operate for a specific cycle time and then automatically shut off to optimize the cycle time. Mounted on frame. Mill was well maintained and in good working order when removed from service in 2020. Includes ball charge.