Raspberry Scones

4½ cups flour ½ cup sugar ¾ teaspoon baking soda 2½ tablespoons baking powder 1 teaspoon salt 8 oz butter, cold 1 cup sour cream (a little milk) 2 pints raspberries (fresh) Additional sugar for dipping Method: Mix together flour, sugar, baking soda, baking powder, and salt. Work in butter until mixture resembles coarse meal. [...]