Refrigerator Slaw
["8 C. shredded cabbage", "1 lg. thinly sliced onion", "1 1/2 C. sugar", "1 C. vinegar", "3/4 C. salad oil", "1 tsp each; dry mustard and celery seed", "salt to taste"]
["Alternate layers of cabbage, onion and sugar.", "Combine remaining ingredients and bring to a boil.", "Pour boiling liquid over cabbage mixture and stir to mix.", "Refrigerate.", "Should keep up to 4 weeks in refrigerator."]
["cabbage", "onion", "sugar", "vinegar", "salad oil", "celery", "salt"]