1 c. egg whites
1/2 tsp. salt
1 tsp. cream of tartar
1 c. plus 2 Tbsp. sugar
1/2 c. flour
1/2 tsp. vanilla
6 egg yolks
2/3 c. flour
1/2 tsp. orange extract

Beat until foamy the egg whites. Add salt and cream of tartar. Beat until stiff but not dry. Fold in carefully 1 cup plus 2 tablespoons sugar. Divide mixture. Fold into one part 1/2 cup flour (sifted 5 times) and vanilla. Fold into other part egg yolks (beaten), 2/3 cup flour (sifted 5 times) and orange extract. Place by spoonfuls into ungreased 9-inch tube cake pan, alternating yellow and white batters as in marble cake. Bake in 325° oven for 60 minutes.