Mad Hatter - The History of the Term

According to the History Channels "Pawn Stars", the term mad hatter was coined back in the 1800's for hat makers. The process involved the use of mercury in unventilated rooms. During the drying process, the mercury was dispersed in the air and inhaled by the hat maker. Mercury would rot their teeth, destroy their nervous system, and make them go crazy or "mad". Most died by the time they were 40. Thought this was interesting.

Guess Les needs to lay off the Mercury!