The commodity clause legislation, 579. — Course of clause through Congress, 581. — Its effect on the anthracite railroads, 586. — The Philadelphia and Reading Railway, 588. — The Lehigh Valley Railroad, 591. — The Delaware, Lackawanna and Western Railroad, 594. — The Delaware and Hudson Company, 595. — Difficulties in complying with clause, 596. — Extent of compliance, 598. — Attempt to suspend penalties, 599. — Proposed amendment of the clause, 600. — Government prosecution, 601. — Decision of the Supreme Court, 602. — Further efforts to amend the clause, 605. — Effect of the Supreme Court decision, 607. — Organization of the Delaware, Lackawanna and Western Coal Company, 607. — Readjustment of the affairs of the Delaware and Hudson Company, 610. — Another Supreme Court decision, 611. — Organization of the Lehigh Valley Coal Sales Company, 613. — Conclusion, 614.