answersLogoWhite

0

What is the idoim mad as a hatter?

User Avatar

Anonymous

12y ago
Updated: 8/20/2019

The phrase "Mad as a Hatter" has its origin from the use of Mercuric Nitrate to carrot, or lay felt in hat manufacture in the 19th century.

The mercury compounds caused serious tremors and other physical problems and have since been put under strict control and even banned in some cases.

User Avatar

Wiki User

12y ago

What else can I help you with?