“This cause comes before the court upon an agreement of counsel that judgment should be entered for the plaintiffs for $2981 23 cents, subject to the opinion of the court on the question, ‘whether the plaintiffs, being a corporation established by congress, within the city of Philadelphia, can maintain a suit in this court against the defendants, being a corporation established by an act of the legislature of this state, within the jurisdiction of the same, and transacting business therein.’ By the second section of the third article of the constitution of the United States, it is declared, ‘that the judicial power of the United States shall extend to all cases in law and equity arising under this constitution, the laws of the United States and treaties made, or which shall be made, under their authority; to all cases affecting ambassadors and other public ministers and consuls; to all cases of admiralty and maritime jurisdiction; to controversies to which the United States shall be a party; to controversies between two or more states; between a state and citizens of another state; between citizens of different states; between citizens of the same state, claiming lands under grants of different states ; and between a state or citizens thereof, and foreign states, citizens, or subjects.’”