now presents, there is no question as to the terms which the Commission might prescribe, or the compensation which* the Pennsylvania Company should receive for the service to be rendered. The sole question is whether the Commission exceeded its authority in requiring the Pennsylvania Company to cease and desist from what the Commission found to be a discriminatory practice.
In determining whether the Commission exceeded its authority under § 3 of the Act to Regulate Commerce, it is essential to consider the character of the service required in the present case. Section 3 was a part of the original Act, and remains unchanged, but there are certain amendments to the Act which are to be read in connection with § 3 as if they were originally incorporated within the Act. Blair v. Chicago, 201 U. S. 400, 475. The Act as amended June 29, 1906, c. 3591, 34 Stat. 584, defines what is meant by common -carriers — engaged in transportation by railroad — which are brought within the control of the Act, and a railroad is defined to include all switches, spurs, tracks and terminal facilities of every kind, used or necessary in the transportation of persons or property designated in the Act, and also all freight depots, yards and grounds used or necessary in the transportation or delivery of any of said property. Not only does the Act define railroads, .but it specifically defines what is meant by transportation, which is made to include “cars and other vehicles and all instrumentalities and facilities of shipment or carriage, irrespective of ownership or of any contract, express or implied, for the use thereof and all services in connection with the receipt, delivery, elevation, and transfer' in transit, ventilation, refrigeration or icing, storage, and handling of property transported.” It is made the duty of every carrier “subject to the provisions of this Act to provide and furnish such transportation upon, reasonable'request therefor, and to establish through routes and just and reasonable rates ap