Orange Fluff Cake
["1 1/2 c. sugar", "9 eggs", "1 c. cake flour", "1 tsp. cream of tartar", "rind of 1 orange, grated", "1/3 c. orange juice", "1/4 tsp. salt"]
["Separate eggs; beat yolks until lemon colored.", "Add rind and orange and salt.", "Add flour and 1/2 cup of the sugar, sifted together 3 times.", "Beat egg whites until frosty.", "Add cream of tartar and remaining salt and sugar and beat until it looks like frosting.", "Then fold the yellow part into the white and put in angel food pan.", "Bake at 325\u00b0 for 1 hour.", "Invert after taking out of oven until cool."]
["sugar", "eggs", "cake flour", "cream of tartar", "orange juice", "salt"]