William R. Day,
New Jersey v. Anderson — Opinion of the Court
“ Conceding the doctrine that the meaning of a statute is a state question, except where rights, the subject of adjudication by the Federal courts, have accrued before its construction by the state court, or the question of contract within the protection of the Federal Constitution is involved, still a state court, while entitled to great consideration, cannot conclusively decide that to be a tax within the meaning of a Federal law providing for the payment of taxes, which is not so in fact. ”
