Experiments to show how gas explodes in a Mine
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Title (Dublin Core)
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Experiments to show how gas explodes in a Mine
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Article Title and/or Image Caption (Dublin Core)
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Title: Experiments to Show How Gas Explodes in a Mine
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extracted text (Extract Text)
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Borrow a large Woulff bottle
from the high school laboratory,
or procure 2 gallon can and cut an ex-
tra hole in the top. Fit the holes with
one-holed stoppers carrying glass tubes
as shown in the illustration. The tube
BC should be of fairly large diameter.
Connect the tube
Awithagas-cock
by means of rub-
ber tubing, and
turn on the gas
to drive all the
air from the
bottle or can.
Light the gas at
Band then with-
draw the tube
A with its stop-
per, at the same
time turning off
the gas; but do
not stop the flow
of gas until the
stopper has been
partially re-
moved. The gas
will continue to
bum at B with
a small flame for some time and then
will seem to disappear entirely. The
observers will conclude that the dem-
onstration is a failure, when suddenly
a very sharp report will oceur and
the bottle be filled with a sheet of
flame.
As the gas escapes and burns at B,
air enters through the open neck until
the bottle is full of an explosive mix-
ture of gas and air. The feeble flame
at B will strike down into the mixture
and produce an explosion. This is
the cause of the striking back of a
hot plate pr gas stove when it is first
lighted. Apply the match before all
the air has been removed from the
‘mixer and the flame strikes back. No
danger attends this demonstration,
for the gases are not sufficiently
‘condensed. FLOYD L. DARROW.
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Contributor (Dublin Core)
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Floyd L. Darrow (Article writer)
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Language (Dublin Core)
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eng
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Date Issued (Dublin Core)
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1919-02
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pages (Bibliographic Ontology)
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104
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Rights (Dublin Core)
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Public domain (Google digitized)
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Archived by (Dublin Core)
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Davide Donà
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Marco Bortolami (editor)
Popular Science Monthly, v. 94, n. 2, 1919
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