My sheathed maximum thermometer has (ever since I just caught the edge of it
on the Stevenson Screen whilst resetting it) developed a small break in the
mercury about half-way along the mercury column itself. I have tried
shaking, spinning and just about everything else I can think of to get the
gap to move to the end of the column away from the bulb but it just sticks
there.

At the moment it isn't worth using as it is over-recording by about 1.5C, so
I am having to rely on the Davis AWS for my maximum temperatures (though to
be honest they were always within +/- 0.2C of each other).

Anyone have ideas on how solve this one?

Cheers

Nick.
________________
Nick G
Otter Valley, Devon
83 m amsl
http://www.ottervalley.co.uk