"Vidcapper" wrote in message
...
On 26/12/2016 11:31, Desperate Dan wrote:

Met office mercury in glass thermometers have a five year calibration
period.


Why just 5 years - surely the only thing that can go wrong is if you drop
them?

--

Paul Hyett, Cheltenham

Not so. The glass can creep due to changes in the glass of the bulb, which
contracts slowly over time.

--
Bernard Burton

Satellite images and weather data for Wokingham at:
www.woksat.info/wwp.html



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