Mahlon Pitney, Illinois Central Railroad Company v…
“ In the first of these, the state law absolutely required that a railroad should furnish a certain number of cars at a specified day, regardless of every other consideration except strikes and other public calamities, making no exception in cases of a sudden congestion of traffic, an actual inability to furnish cars by reason of their temporary and unavoidable detention in other states or in other places within the same state, or any allowance for interference with traffic occasioned by wrecks or other accidents upon the same or other roads ”
