Galileo Thermometer

As the temperature changes so does the density of the liquid inside the glass cylinder. Each of the glass bulbs filed with coloured liquid are weighted such that they will rise or fall with the change in density.

http://en.wikipedia.org/wiki/Galileo_thermometer

[Kristin Cruz]

That is SO cool! A great pic too!

[Graham Harcombe]

I do like the reflections on the lower bulb, everything (everything that is meant to) has perfect focus.

[Sylvia]

Lovely!

[Juliette Packham]

I have one of these, they are so cool! nice shot