On Jul 16, 11:03*pm, Charles Ellson
wrote:
On Sat, 16 Jul 2011 22:40:07 +0100, The Natural Philosopher

wrote:
Graeme Wall wrote:
On 16/07/2011 10:24, Guy Gorton wrote:
That seems very low. *My facts may be wrong but I think 30ft of water
creates 1 atmosphere of pressure, which is about 14 lbs/sq.in.

If I remember my schoolboy physics, it's 32ft of water and 15lbs/sq.in..

32.2 & 14.4 rings a bell..

14.7 rings it better unless you're somewhere up a mountain.

NPT = 1013 millibars at sea level. We've gone metric, haven't you
heard?

It was supposed to be 1000mb but Napoleon's scientists got it wrong.