Blackberry Pie III Recipe

1 recipe pastry for a 9 inch
double crust pie
4 cups fresh blackberries
3 tablespoons all-purpose flour
1 cup white sugar
1 tablespoon lemon juice
1 tablespoon butter

Directions
1 Preheat oven to 450 degrees F (230 degrees C).
2 Line a 9 inch pie pan with half the pastry. Save remaining pastry for top crust. Chill both while preparing the blackberries.
3 Combine berries, flour, sugar, and lemon juice. Spoon into pie shell, and dot with butter or margarine. Cover with top crust, and slash in several places.
4 Bake for 15 minutes. Reduce heat to 350 degrees F (175 degrees C). Continue baking for 35 to 40 minutes, or until browned.