What did the first US Mint use as a power source to drive the cutting and stamping machinery?

The first Philadelphia Mint's presses were hand-operated, with the other equipment powered by humans or horses. The typical coining press in use at the Mint was the screw press, powered by human muscle. The first steam-powered equipment was installed June 24, 1816. Further mechanization came in 1833, when the second Philadelphia Mint was opened. The man-powered screw presses were replaced with steam-powered coining presses in the 1830s.

While the Mint says horses were used (The first Philadelphia Mint used harnessed horses to drive the machinery that produced coinage), of course, human power was used as well. Another good answer, Jenny !