Sunshine Cake - cooking recipe

Ingredients

6 eggs, separated
1/8 teaspoon salt
1/3 teaspoon cream of tartar
1 cup cake flour
1 cup sugar
1 lemon, graded rind
1 teaspoon vanilla

Preparation

Sift flour, measure; then sift 4 times.
Measure and sift sugar.
Beat yolks until light and thick; gradually beat in one-half of the sugar and the lemon rind and vanilla.
Beat whites until frothy, add cream of tartar.
Beat to stiff peak stage, but not dry.
Fold in remaining sugar.
Fold in remaining sugar.
Cut and fold some of the whites mixture into yolk mixture; fold and cut in the flour and salt; then rest of the whites mixture.
Place in an un-greased pan with center tube.
Bake 1 hour at 325.
Invert pan.
When cool, remove cake.