On Apr 21, 1:17*pm, "Roger Helio" wrote:


1. They used carbon tetrachloride as the agent which affects the human brain
("mad hatter").

The Hatter was mad because of mercury (used in the manufacture of felt
hats) poisoning.

2. When used on burning magnesium, phosgene (nerve gas) was generated.

Phosgene is a choking agent.