Preheat oven to 325 degrees. Grease and flour a 10" bundt or tube pan. Combine flour, soda and salt; set aside. Cream butter and sugar. Add eggs one at a time, beating well. Add dry ingredients alternately with buttermilk. Add lemon extract. Bake for 1 hour and 15 minutes or until a toothpick inserted near the center comes out clean. Cool for 10 minutes. Remove from pan to a wire rack to cool completely.