Education of the Mind: TIL that the large crack in the Liberty Bell is actually because of a large repair job. In 1846, metal workers widened the thin crack to prevent it from spreading and to restore the tone of the bell by using a technique called "stop drilling".

Sunday, July 16, 2017

TIL that the large crack in the Liberty Bell is actually because of a large repair job. In 1846, metal workers widened the thin crack to prevent it from spreading and to restore the tone of the bell by using a technique called "stop drilling".

http://ift.tt/22nLmS2 via /r/todayilearned http://ift.tt/2v7ip2R

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