Mad hatter

This one is about the phrase mad hatter. I’ve always wondered where some of our phrases come from so I decided to take some time to research them. First phrase I chose was mad hatter. This phrase came about around the time Fur trade in the new world began. The hats that the fur traders were warring were actually making them go crazy. Now it wasn’t the fur they were made of but it was the way they cleaned the hide itself. They used a element called mercury which is very very poisons and targets the nervous system. So they basically were warring poison on their heads and thus went mad so this is where the phrase mad hatter comes from.