Boiled Icing(A World War Ii Recipe)  
["1 c. water", "1 tsp. vinegar", "4 c. sugar", "4 egg whites", "1 tsp. lemon juice"]
["Boil together water, vinegar and sugar until it spins a thread.", "Pour slowly over stiffly beaten egg whites and beat until creamy.", "Add lemon juice."]
["water", "vinegar", "sugar", "egg whites", "lemon juice"]