On Tue, 24 Jan 2006 14:33:40 GMT, "Edwin Pawlowski"
wrote:


"mm" wrote in message

I think you would smell the methane if it were there. Or am I
confusing this with another gas?


Methane is odorless. But in a sewer, there are other aromatics that help
let you know there may be something present.

That's right. I get it now.

Methane was a problem in mines

Still is.

and that is why they used to take canaries
into the mines as detectors. Canary dies, get out.



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