> "Then you remove the coin from the mercury bath and heat it up to drive the mercury out," said Wiescher. This gives you a silver coin with a copper core, capa

> "Then you remove the coin from the mercury bath and heat it up to drive the mercury out," said Wiescher. This gives you a silver coin with a copper core, capable of passing the bite test. I wonder how many merchants got mercury poisoning as a result of this technique