On Mon, 11 Dec 2006 15:24:28 GMT someone who may be Peter Lynch
wrote this:-

On a related point, why are hot water storage tanks cylindrical?

In addition to what has already been said, the corners of the old
square hot water tanks had a number of problems. Cylinders are a
much better bet.



--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54