On Fri, 11 Feb 2005 15:12:27 GMT, George Patterson wrote:

W P Dixon wrote:

That's pretty cool (Pardon the pun ) Where can I read up on that George?

I read about it in the 70s and don't remember where; probably a Science Fact
article in Analog or Popular Mechanics. As I recall, the technique is to dig a
hole large enough to keep your water container completely below ground. Cover it
during the day and insulate it (the Romans used straw). Leave it open to the
night sky. It will freeze in a few days. The article said it only works in areas
where the night sky is usually perfectly clear (ie. the desert).

This site gives a reference:

http://www.madsci.org/posts/archives/nov99/941723540.Sh.r.html

Marty