On Tue, 18 Jan 2005 01:29:18 GMT, Errol Groff wrote:

I don't know ow they are made but I do know that you should always but
thermometers in the summer time. That you way you get a lot more
mercury for your buck!

Of course. As far as how to fill it accurately, I would imagine the whole
filling system is at a temperature at the top of the scale - fill it to
the top, and as it cools it'll shrink down. But the volumes have
to be very precise. I'd also like to know how it's drawn, but the
filling I think is the easy part.