23 AGRICULTURAL IMPLEMENTS AND PARTS THEREOF, AND PARTICULARLY CORN SHELLERS, CULTIVATORS, DRILLS, ELEVATORS, FEED MILLS, FERTILIZER DISTRIBUTORS, HARROWS, HARVESTERS, COMBINED HARVESTER THRESHERS, HAY LOADERS, HAY PRESSES, HAY STACKERS, [ HORSE POWERS ] LISTERS, MANURE SPREADERS, MOWERS, PLANTERS, PLOWS, POTATO DIGGERS, RAKES, REAPERS, RIDGE BURSTERS, ROD WEEDERS, SEEDERS, SICKLE GRINDERS, SILO FILLERS, SOIL PULVERIZERS, STALK CUTTERS, STATIONARY ENGINES, AND TRACKTORS