Cream butter and sugar until light and fluffy. Add beaten eggs and lemon extract. Mix well. Sift flour, baking powder and salt together. Add half the dry ingredients to the creamed mixture. Dredge nuts and fruits with the remainder. Add and mix thoroughly with creamed mixture (this will take a large container - - I use my larger roaster). Line pan with two thicknesses of waxed paper or brown wrapping paper. Grease paper well. Spoon batter into pans, distributing evenly. Bake large cake at 300 degrees for 1 and 1/2 hours. This makes one large angel food sized cake and one loaf cake. You can leave out dates and make one large angel food sized cake.