 Two more seats were added in 1837, as a result of the Eighth and Ninth Circuits Act (); one of these (seat 7 below) was later abolished as a result of the Judicial Circuits Act of 1866.The Supreme Court reached its peak size in 1863, when the Tenth Circuit Act () became law, and a tenth justice joined the Court.After fluctuating from nine to ten to eight members over a six-year period, the size of the Court was restored to nine members through the Circuit Judges Act of 1869 (), a broad Reconstruction Era reorganization of the federal courts.