“Mad as a hatter” is a colloquial phrase used to refer to a crazy person. In 18th & 19th century England mercury was used in the making of felt, which was used in the manufacturing of hats. People who worked in these hat factories were exposed

“Mad as a hatter” is a colloquial phrase used to refer to a crazy person. In 18th & 19th century England mercury was used in the making of felt, which was used in the manufacturing of hats. People who worked in these hat factories were exposed

tags: Spooky! Scary!, hatter,Mad as a hatter,Mad,crazy,weird,curiosities,insane,metal,mercury,dementia,

from: http://spoookyscary.tumblr.com/post/50382363434