The Commission shall make for each of the railroad corporations doing business in this State, as soon as practicable, a schedule of just and reasonable rates of charges for transportation of passengers and freight cars on each of such railroads and such schedule shall, in suits brought against any such railroad corporation wherein is involved the charges of any such railroad corporation for the transportation of any passenger or freight or cars, or unjust discrimination in relation thereto, be deemed and taken in all of the courts of this State as sufficient evidence that the rates therein fixed are just and reasonable rates of charges for the transportation of passengers, freights and cars upon such railroad when such schedules have been prepared and published as aforesaid for all the railroad companies organized under the laws of this State.