This is a list of cases reported in volume 307 of United States Reports, decided by the Supreme Court of the United States in 1939. Justices of the Supreme Court at the time of volume 307 U.S. The Supreme Court is established by Article III, Section 1 of the Constitution of the United States, which says: "The judicial Power of the United States, shall be vested in one supreme Court . . .". The size of the Court is not specified; the Constitution leaves it to Congress to set the number of justices. Under the Judiciary Act of 1789 Congress originally fixed the number of justices at six (one chief justice and five associate justices). Since 1789 Congress has varied the size of the Court from six to seven, nine, ten, and back to nine justices (always including one chief justice). When the cases in volume 307 were decided the Court comprised the following members: Notable Cases in 307 U.S. United States v. Miller United States v. Miller, 307 U.S. 174 (1939), is a significant Supreme Court decision involving a Second Amendment to the United States Constitution challenge to the National Firearms Act of 1934 (NFA). The case is often cited in the ongoing American gun politics debate, as both sides claim that it supports their position. Lane v. Wilson In Lane v. Wilson, 307 U.S. 268 (1939), the Supreme Court ruled that a 12-day, one-time voter registration window was discriminatory for black citizens and repugnant to the Fifteenth Amendment. Perkins, Secretary of Labor v. Elg Perkins, Secretary of Labor v. Elg, 307 U.S. 325 (1939), is a decision by the Supreme Court that a child born in the United States to naturalized parents is a natural-born citizen, and that the child's U.S. citizenship is not lost if the child is taken to and raised in the country of the parents' origin, provided that upon attaining the age of majority, the young person elects to retain U.S. citizenship "and to return to the United States to assume its duties." Coleman v. Miller, Secretary of the Senate of Kansas Coleman v. Miller, Secretary of the Senate of Kansas, 307 U.S. 433 (1939), is a landmark decision of the Supreme Court, which clarified that if the Congress of the United States—when proposing for ratification an amendment to the United States Constitution, pursuant to Article V —chooses not to set a deadline by