[1052] Ibid. § 313 (c).

[1053] 66 Stat. 163, § 337 (a). In United States v. Schwimmer, 279 U.S. 644 (1929); and United States v. Macintosh, 283 U.S. 605 (1931) it was held, by a divided Court, that clauses (3) and (4) of the oath, as previously prescribed, required the candidate for naturalization to be ready and willing to bear arms for the United States, but these holdings were overruled in Girouard v. United States, 328 U.S. 61 (1946).

[1054] 66 Stat. 163, § 340 (a); see also Johannessen v. United States, 225 U.S. 227 (1912).

[1055] Ibid. § 340 (c). For cancellation proceedings under the Nationality Act of 1910 (54 Stat. 1158, § 338); see Schneiderman v. United States, 320 U.S. 118 (1943); Baumgartner v. United States 322 U.S. 665 (1944), where district court decisions ordering cancellation were reversed on the ground that the Government had not discharged the burden of proof resting upon it. Knauer v. United States, 328 U.S. 654 (1946) represents a less rigid view.

[1056] Osborn v. Bank of the United States, 9 Wheat. 738, 827 (1824).

[1057] 328 U.S. 654 (1946).

[1058] Ibid. 658.

[1059] Johannessen v. United States, 225 U.S. 227 (1912) and Knauer v. United States, 328 U.S. 654, 673 (1946).

[1060] 66 Stat. 163, tit. III, § 352 (a).

[1061] Perkins v. Elg, 307 U.S. 325, 329, 334 (1939). Naturalization has a retroactive effect and removes all liability to forfeiture of land held while an alien (Osterman v. Baldwin, 6 Wall. 116, 122 (1867)); the subsequent naturalization of an alien who takes land by grant or by location on public land relates back and obviates every consequence of his alien disability (Manuel v. Wulff, 152 U.S. 505, 511 (1894); Doe ex dem. Governeur's Heirs v. Robertson, 11 Wheat. 332, 350 (1826)). A certificate of naturalization, while conclusive as a judgment of citizenship, cannot be introduced in a distinct proceeding as evidence of residence, age or good character of the person naturalized (Mutual Ben. L. Ins. Co. v. Tisdale, 91 U.S. 238 (1876)).