Sponge cake

MMMMM----- Recipe via Meal-Master (tm) v8.02
  
       Title: Sponge Cake
  Categories: Penndutch, Cakes
       Yield: 1 servings
  
       6    Egg, separated
       1 c  Sugar
       1 c  Flour
     1/3 ts Cream of tartar
       1 ts Vanilla
       1    Lemon, grated rind of
     1/4 ts Salt
  
   Sift the flour 4 times. Beat yolks of eggs until light and thick.
   Gradually add 1/2 of the sugar, the lemon rind and vanilla. Beat the
   whites until stiff and add the cream of tartar and the remaining
   sugar. Combine the egg mixtures. Add salt to flour and fold into the
   egg mixture lightly. Pour into an ungreased pan with center tube.
   Bake at 325-F for 1 hour.
   
   Source:  Pennsylvania Dutch Cook Book - Fine Old Recipes, Culinary
   Arts Press, 1936.
  
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