Oleg Lego wrote:
The Robert Bonomi entity posted thusly:

Would you believe "Carbon tetra-chloride"?

It _does_ extinguish fires. But the gas it givesoff is rather dangerous.

Minor trivia:
Folks who made hats used to use 'carbon-tet', and it affected their
brains. Hence the phrase "Mad as a hatter".

Actually it was the mercury that they used in hatmaking that affected
them.