Who fixed the crack in the liberty bell?
When the bell was first cracked, the bell was rebuilt by John Pass and John Stow of Philadelphia. Pass and Stow added copper to the composition of the alloy used to cast the bell, the sound of the bell was unsatisfactoy. So Pass and Stow recast the bell again, and this third bell is the one that was hung in the steeple of the state house in 1753. It is not certain when the second crack appeared. The bell was retired shortley after in 1846.
