Steam rice, salt and milk in the top of a double boiler over (not in) boiling water for about 1 hour. Stir frequently and watch that the pan does not boil dry. When the rice is tender, cool slightly and add the butter, sugar, and vanilla. Serve as a pudding, hot or cold, with stewed or canned fruit, crushed sweetened berries, or quince jelly sauce, or with a combination of 4 T sugar and 1 T cinnamon.