RBC | No, it’s not a fancy wash tub like Ma Kettle washed the clothes and kids in. Terry Mobley tells me that his tub was used to measure a bushel of grain by volume. The traditional wash tub had crimped seam and a flat bottom. Terry says his tub is a galvanized iron basket rounded at the bottom with no seam. It was rounded so that grain would not be trapped in a corner.…