During the examination of liquids a means has accidentally been
discovered by which a glass tube may be filled with fluorine gas. A
few liquids, one of which is carbon tetrachloride, react only very
slowly with fluorine at the ordinary temperature. By filling a glass
tube with such a liquid, and inverting it over a platinum capsule also
containing the liquid, it is possible to displace the liquid by
fluorine, which, as the walls are wet, does not attack the glass. Or
the glass tube may be filled with the liquid, and then the latter
poured out, leaving the walls wet; the tube may then be filled with
fluorine gas, which being slightly heavier than air, remains in the
tube for some time. In one experiment, in which a glass test tube had
been filled with fluorine over carbon tetrachloride, it was attempted
to transfer it to a graduated tube over mercury, but in inclining the
test tube for this purpose the mercury suddenly came in contact with
the fluorine, and absorbed it so instantaneously and with such a
violent detonation that both the test tube and the graduated tube were
shattered into fragments.
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