MARBLE CAKE

Take two cups of sugar, one cup of butter, four eggs (yolks), one cup of milk, three cups of flour, and three teaspoons of baking-powder (scant). Cream the butter and sugar, and add the yolks of eggs. Then add the milk, flour, baking-powder, and the beaten whites of the eggs; flavor with lemon. To make the brown part; take a square of bitter chocolate and melt above steam, and mix with some of the white; flavor the brown with vanilla. Put first a tablespoon of brown batter in the pan, and then the white. Bake in quick oven thirty-five minutes.