Celebrate the wonders of science with this beautiful looking thermometer a lovely interpretation of the 16th century galileo thermometer it takes the form of a teardrop seemingly suspended within a wooden framea truly eye catching ornament for a desk table or mantelpiece it works on the theory that the density of a liquid changes according to its temperature its mesmerising enough in itself but it really does work inside the teardrop jewel coloured glass balls each have a metal tag atta