Actions for In the District Court of the United States for the district of Wyoming (in equity no. 1431,) United States of America, plaintiff, vs. Mammoth Oil Company, a corporation of the state of Delaware, Sinclair Crude Oil Purchasing Company, a corporation of the state of Delaware, and Sinclair Pipe Line Company, a corporation of the state of Maine, defendants [electronic resource] : brief on behalf of defendant Mammoth Oil Company on the law