For turpentine trespass in a State where there is no State law governing such trespass, the measure of damages will be as follows:

(a) Innocent trespass. Value of the gum and injury done to the trees. United States v. Taylor (35 Fed. 484).

(b) Willful trespass. Value of the product manufactured from the crude turpentine by the settler, or any person into whose possession same may have passed, without credit for labor bestowed on the turpentine by the wrongdoer. Union Naval Stores Co. v. United States (240 U.S. 284, 60 L. ed. 644).