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From: David Kuchta <>
Subject: Methanometer
Date: Sun, 05 Dec 1999 20:22:32 -0500


Question? When did they first start using equipment to measure methane and
oxygen with an instrument called a methanometer? A coal miner friend of
mine thinks it was 30 years or so ago. I just wonder when this instrument
was invented and by whom?
Also, if the Davey's Safety Lamp loses its flame or goes out this would
signify that there is a lack of oxygen in the mine. If so, why did they use
mine canaries?
Any help will be appreciated. Thanks in advance.

Dave Kuchta

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