SPONGE JELLY CAKE

Beat the yolks till very thick, add sugar gradually, then the grated rind and two tablespoonfuls of lemon juice. Fold in one-half of the whites of the eggs, beaten very stiff, then one-half of the flour, the other half of the whites, lastly the remainder of the flour. Bake in a large dripping-pan fifteen minutes. Turn onto a cloth, trim the edges, spread the jelly, and roll up. Wrap in the cloth and set aside to cool.