1, Don't try this at hone
2. Don't smoke while you are not trying it.

> Vapor pressure of butane @ -15C leads one to suspect it's
> not at -15C...

Tip LPG barbeque gas tank on side with valve slightly downhill.
Open valve fully so gas roars out.
After a few seconds starts to spit then produces more liquid then
much liquid as temperature drops. Soon there is a rivulet of liquid
propane/butane mix running down the bank.
Unusual.

Russell
--=20
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