Mahlon Pitney, Michigan Central Railroad Company v…
“ That it is not, as a rule, unreasonable to require such interchange of cars, sufficiently appears from the universality of the practice, which became prevalent before it was made compulsory, and may be considered as matter of common knowledge, inasmuch as a freight train made up wholly of the cars of a single railroad is, in these days, a rarity. In Michigan, car interchange has long been a statutory duty. ”
