Horace Gray, Rhodes v. Iowa/Dissent Gray — Dissent
“ When the nature of the particular subject in question is such as to demand a single uniform rule, operating equally throughout the United States, the power of congress is exclusive; but when the subject is of such a nature as to require different systems of regulation, drawn from local knowledge or experience, and conformed to local wants, it may be the subject of state legislation so long as congress has not legislated. ”
