On Apr 21, 1:17=A0pm, "Roger Helio" <R...@[EMAIL PROTECTED]
> wrote:
>
> 1. They used carbon tetrachloride as the agent which affects the human
bra=
in
> ("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.
