Just thinking out loud here. If you insolate the top pretty well, so that the top doesn't freeze first, then as the rest freezes it will push up and, if you leave head space, it should be OK. Maybe wrapping the top half of the barrel in bubble wrap or old blankets would do the trick.
Again, just thinking out loud. -- Blue skies. Dan Rossi Carnegie Mellon University. E-Mail: [EMAIL PROTECTED] Tel: (412) 268-9081
