Much of U.S. history involves high-temperature thermal processing in one form or another – melting, forging or heat treating.
In October 1751, the Pennsylvania Assembly ordered the original Liberty Bell from Whitechapel Foundry in London. The London agent was asked by Assembly Speaker Isaac Norris to procure a “good bell of about two thousand pounds weight. Let it be cast by the best workmen and examined carefully before it is shipped … to proclaim liberty through all the land to all the inhabitants thereof.” The bell arrived on Sept. 1, 1752. During the first test ring, the bell cracked.