Chocolate Cake II

½ cup butter

1½ cups sugar

½ cup milk

2¼ cups flour

¼ teaspoon soda

¾ teaspoon cream of tartar

Whites 5 eggs

2 squares Baker’s chocolate, grated

Cream the butter; add sugar gradually, milk, and flour mixed and sifted with soda and cream of tartar. Beat whites of eggs, and add to first mixture; then add chocolate, and beat thoroughly. Bake forty-five minutes in a moderate oven.