"Ian Bingham" wrote in message
news
Does anyone know how to get bubbles out of the thread of a Met.Office
pattern minimum thermometer? Actually, I do know how it’s usually done.
You gently heat the thermometer and the expanding alcohol carries the
bubbles up to the reservoir at the top, where they disappear. I’ve done
two successfully, but the trouble this time is that the bubbles are in the
lower half of the scale and there seems no way I’m going to get them up to
the top by heating.

Ian Bingham,
Inchmarlo, Aberdeenshire.

Thanks Steve, Dan and Martin - advice much appreciated. The telephone
directory method worked, with a little bit of patience. The next observer
who shakes down a minimum thermometer will be given the choice of the
garrotte or the bastinado :-)

Ian.