Nelson, J.

The evidence under the plea is satisfactory, and sufficient to show that the plaintiff is by virtue of law a citizen of the United States and of the state of Minnesota."

Objection is made to the admissibility of the certificate of naturalization of the plaintiff’s father offered in evidence. The evidence of the plaintiff alone, uncontradicted, without this authenticated record, is sufficient to authorize the court, under the act of congress of March, 1875, to dismiss or remand the case, but in my opinion the certified copy is admissible. The act of congress (Rev. St. § 905, p. 171) providing for the mode of authenticating records of state courts is not exclusive, and states can adopt any other-method. In the state of Minnesota it is enacted that “the records and judicial proceedings of any court of any state or territory of the United States shall be admissible in evidence in all cases in this state when authenticated by the attestation of the clerk * * * having charge of the records of such court, with the seal of such court annexed; ” Young’s' 'St. (Minn.) § 54, p. 800. The document offered meets the requirements of this statute and is admissible in evidence.

It is without doubt the right and duty of the court to remand a case removed from a state court if it ascertains in any way that it was not removable under the law. This court cannot be obliged to proceed *691with the trial of a cause with the knowledge that it is in fact not within its jurisdiction, and that either party may at any moment, by raising the question of jurisdiction on the record, put an end to the proceedings. If it were otherwise, the parties to such an action might, by suppressing the facts .with respect to citizenship, require the court to proceed until they have discovered its views of the law, and then, if not satisfied, might interpose a motion to dismiss or remand. See 104 ü. S. 209. The court cannot permit s»ny practice which will make possible such an experiment. If the judge has reason to doubt the existence of the jurisdictional facts, he has a perfect right to examine the parties upon that question, or to direct a plea in abatement to be filed and heard in order to settle at the outset that question.

The proof in this case shows that the plaintiff was the son of a person who was duly naturalized under the laws of the United States, and a minor dwelling therein at the time of the naturalization of his father. He thus became, by virtue of law, a citizen. Rev. St. § 2172, p. 380.

The plaintiff and defendant being citizens of the state of Minnesota, this court has no jurisdiction of the cause removed. Judgment on the plea will be entered in favor of the plaintiff, and in furtherance of justice it is remanded to the Ramsey county district court, with costs to be paid by the defendant.