[ExI] puzzle

Adrian Tymes atymes at gmail.com
Wed Jul 1 20:51:11 UTC 2020


In large evaporative coolers: https://en.wikipedia.org/wiki/Yakhch%C4%81l

On Wed, Jul 1, 2020 at 1:36 PM William Flynn Wallace via extropy-chat <
extropy-chat at lists.extropy.org> wrote:

> Here is one I ran across in an article on air conditioning.  In ancient
> Egypt ice was made.  How did they do it?
>
> bill w
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