per sq. inch.] the pressure after explosion reaches 92.33
atmospheres on an average, which is an increase of 8.37 times the
original figure; if the gas is stored at 21.13 atmospheres, the mean
pressure after explosion is 213.15 atmospheres, or 10.13 times the
original amount. If liquid acetylene is tested similarly, the original
pressure, which must clearly be more than 21.53 atmospheres (Ansdell) at
0 deg. C., may rise to 5564 kilos, per square centimetre, as Berthelot and
Vieille observed when a steel bomb having a capacity of 49 c.c. was
charged with 18 grammes of liquefied acetylene. In the case of the
solution in acetone, the magnitudes of the pressures set up are of two
entirely different orders according as the original pressure 20
atmospheres or somewhat less; but apart from this, they vary considerably
with the extent to which the vessel is filled with the liquid, and they
also depend on whether the explosion is produced in the solution or in
the gas space above. Taking the lower original pressure first, viz., 10
atmospheres, when a vessel was filled with solution to 33 per cent. of
its capacity, the pressure after explosion reached about 95 atmospheres
if the spark was applied to the gas space; but attained 117.
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