The law makes no special mandate. In 1789, Justice James Wilson was sworn in by the mayor of Philadelphia, Pennsylvania, where the court first sat. Thurgood Marshall, the nation's first African-American justice, took the Constitutional Oath in 1967 from Associate Justice Hugo Black, an Alabaman.
ballast - A device required by electric-discharge light sources such as fluorescent or HID lamps to regulate voltage and current supplied to the lamp during start and throughout operation.
Lead is a heavy metal that was used in many consumer products, such as gasoline and interior and exterior paint, before it was gradually phased out in the late 1970s and 1980s. Despite discontinued use, lead is persistent in the environment and continues to pose a risk to health.