The expression "mad Hatter" comes from when the hat makers used lead to make fancy hats for the rich. I think to attach feathers and such.
more off topic- i was watching Bloomberg or something and some Chinese guy was selling the benefits of canned air in Shanghai, The commentator said it smelled like lead. Soooo- the can did have lead in it to make the can have "weight"
News 
Market Data 
Discover 
