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.
Check the label on the ballast in your fixture to see what type it is, and what type of lamps it is intended for.2. That Annoying Buzz:All electromagnetic ballasts gener-ate hum. Look for the âsound rat-ingâ of A through F on the ballastâs label.