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LIQUID OXYGEN AS AN
EXPLOSIVE.
Germany, during, the war, experi-
mented with liquid oxygen as an ex-
plosive, but was unable to overcome
the problems of transport and ig-
nition. Italian chemists, says "Dis-
covery," have now, however, succeed-
ed where Germany failed, and find it
a most efficient Explosive for blast-
ing in mining operations, among
other uses. The liquid gas, after
suitable purification, is put into cyl-
indrical cartridges consisting of two
glass or metal vessels arranged to
sort of Dewar or "vacuum" flask.
In the end of each cartridge is a
hole into, which the fuse is fitted ;
this is done after the cartridges have
been placed in position for firing.
When everything is ready a little
liquid oxygen is poured over the
cartridge and fuse to cool them, and
the latter fired either electrically or
by hammer detonation.
Three standard types of cartridges
have been prepared; cartridge P,
equivalent in explosive properties to
gunpowder ; cartridge A, of average
detonating power ; and D, similar to
dynamite. These cartridges have the
great advantage of safety after a
misfire, since all the oxygen evapor-
ates within thirty minutes, after
which tore cartridge may be withdrawn
without any risk. In explosive power
the liquid oxygen is greater than any
other explosive known, and, of course
yields no noxious fumes.
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