資料來源 : Webster's Revised Unabridged Dictionary (1913)

Crofton system \Crof"ton sys"tem\ [After Sir Walter Crofton,
   Irish penologist.] (Penology)
   A system of prison discipline employing for consecutive
   periods cellular confinement, associated imprisonment under
   the mark system, restraint intermediate between imprisonment
   and freedom, and liberation on ticket of leave.