Stir together milk and 1/4 cup lemon juice until thickened. Beat whites stiff. Fold into milk mixture. Add 2 tablespoons lemon juice to applesauce. Line 8" square pan with wax paper. Put layer of wafers on bottom; top with half the milk mixture and half the applesauce mixture. Repeat. Top with a layer of wafers. Chill 12 hours. Turn out and remove paper. Cut in 2"x4" pieces.