Butter Sponge.

6oz. flour, 4oz. sugar, 3oz. butter, 2 eggs, 2 tablespoons milk, grated rind half an orange, 1 teaspoon orange juice, 1 teaspoon cream of tartar, 1/2 teaspoon soda. Cream butter and sugar; add beaten eggs and flour alternately, then the milk and orange, cream of tartar and soda in flour. Bake for half an hour (2nd. shelf, no. 4 regulo).