"Tim Streater" wrote in message
.. .
In article , Nick
wrote:

A cylinder of dissolved acetylene went up ...

Dissolved in what?

I believe it's in acetone. The cylinder has a honeycomb structure inside to
act as baffles to stop the acetone and dissolved acetylene from sloshing
around too much because that might cause it to self-detonate. Acetylene
cylinders really are not to be trifled with :-(