In a bowl combine the apples, 2 T. of the granulated sugar, 2 t. of the cinnamon, and half t. of the nutmeg and let the mixture stand for 20 minutes. In a bowl whisk together the flour, remaining 2 cups granulated sugar, slat and baking powder and make a well in the center. Whisk in the melted butter, eggs, vanilla, and the orange juice and whisk the batter until it is combined well. Pour one third of the batter into a buttered 13x9 baking dish and spoon half the apple mixture over it. Pour half the remaining batter over the apple mixture, cover it with the remaining apple mixture, and cover the apple mixture with the remaining batter. In a small bowl combine well the brown sugar, walnuts, softened butter, remaining quarter t. cinnamon and remaining quarter t. nut-meg., sprinkle the mixture over the batter, and bake the cake in the middle of a preheated 350 oven for 35 40 min, or until golden and a tester comes out clean. ----