Centrifugal acceleration is used to separate the outer hull from the inner oat groat. This coincided with the introduction of a larger denomination, the groat (4 pence). "Not worth a groat" is an old saying meaning "not worth a penny", i.e. worthless. Only two employees remain&colon; the aged Junior Postman Tolliver Groat and his assistant Stanley Howler. In colloquial German the 10-pfennig coin was sometimes called a "groschen" (cf. groat). Rickey believed that Groat, 32 at the time, was too old. He gave the alm of a groat to the poor. Groat played college basketball for Duke University. He is best remembered, however, for the realistic portraits on his silver groat. Groat, however, still had two prime years left.