On 15/01/2019 13:26, alan_m wrote:
On 15/01/2019 12:43, Andy Burns wrote:
Andrew Gabriel wrote:

Can you get it cold enough to pull all the mercury into the bulb,
like maybe in your freezer?

Might help to cool the bulb only, rather that the whole thermometer?


Freezer spray?

https://uk.rs-online.com/web/p/freezer-sprays/0846682/

Probably much cheaper elsewhere. Also used for freezing water in
plumbing pipes etc.

I missed the OP but if its a thermomter with the little thingies that
stay there to indicate max or min, maybe a really powerful magnet can
reset them and pull the mercury back



--
Any fool can believe in principles - and most of them do!