Article View: sci.physics
Article #7387coal mines and candles
From: JOHNSON%nuhub.acs.northeastern.e...
Date: Tue, 04 Nov 1986 12:58
Date: Tue, 04 Nov 1986 12:58
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1027 bytes
From: "I am only an egg." <JOHNSON%nuhub.acs.northeastern.edu@CSNET-RELAY.ARPA>
At one time I was informed that early coal miners used candles on
their helmets to provide light in the mines. This would cause an
explosion now and them because of coal gas build-up. Someone
discovered that by putting a metal cage around the flame, the candle
could be safely used in the mine.
Does anybody know whether or not this is true, who discovered it
and why it works?
Chris Johnson
Northeastern University
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!rutgers!sri-spam!sri-unix!hplabs!pyramid!ctnews!gypsy!andrew!JOHNSON%nuhub.acs.northeastern.edu@CSNET-RELAY.ARPA From: JOHNSON%nuhub.acs.northeastern.edu@CSNET-RELAY.ARPA Newsgroups: sci.physics Subject: coal mines and candles Message-ID: <238@sri-arpa.ARPA> Date: Tue, 4-Nov-86 07:58:00 EST Article-I.D.: sri-arpa.238 Posted: Tue Nov 4 07:58:00 1986 Date-Received: Sat, 8-Nov-86 05:34:00 EST Lines: 13