Chap. 0255 An Act to confirm the jurisdiction of the united states over a tract of land in the city of lowell acquired for a post office. Be it enacted, etc., as folloivs: Section 1. The United States may at any time within one year after the passage of this act file in the office of the secretary of the commonwealth a suitable plan of the tract of land in the city of Lowell to which the United States has acquired title in fee, and upon which a post office has been erected, and the filing thereof within said time shall be deemed to be a sufficient compliance with the provisions of section one of chapter forty-three of the acts of the year eighteen hundred and seventy-three, and all acts in amendment thereof and in addition thereto. Section 2. This act shall take effect upon its passage.