On Fri, 14 Nov 2008 08:39:02 -0800 (PST), Andy Dingley
wrote:

On 14 Nov, 16:14, "Graham." wrote:
I just saw an "expert" on "Flog It tell a guy always to keep
his barometer upright, an never ever lie it down.

As advice aimed at an audience that watches daytime TV, then it's not
too bad. You don't want them spilling mercury, I doubt if many could
spell aneroid let alone tell what sort of barometer they had.

Is the mercury not sealed in? Is it not to prevent the mercury
splitting with the problem of getting it all back together again?