the number can be in the range of for example 1 to 20 and for example preferably 4 to 8 The radius of the cylinder is in the range of 6 to 25 mm and preferably about 12 mm Each slot is just large enough to accept one kernel For wheat, the slots are preferably 3-4 mm long, 2-3 mm wide and 2-3 mm deep As the cylinder rotates, a kernel is transported from an input port to an output port Upon exiting