In these instruments, the glass balls in the tube differ in weight, and considering the density of the liquid, you are guaranteed that the lowest of the floating balls in the upper part of the cylinder indicates the correct temperature. Each ball has a temperature tag on it so its easily readable. The production of this instrument is extremely complicated. Each ball is calibrated to within exactly .36 degree Farenheight. Each cylinder is of solid glass construction with a wide glass base to present a low center of gravity to minimize the chance of tipping.
Standard units have temperatures marked in Fahrenheit.
Celsius is available via special order. These make wonderful decorative conversation pieces, and they fit in decors ranging from modern to antique. They are certainly eye catching and fun to own, or make great gifts. The liquid inside the Galileo is clear, non toxic, and flame resistant. The floating bulbs in each of these are multicolored including black , cognac , bordeaux , green , blue , and clear.