Galilei Thermometer Brass – an original Inca design.
The Thermo Glass is made of a sealed glass cylinder containing a clear liquid and several glass vessels of varying densities. As the temperature changes, the individual floats rise or fall in proportion to their respective density. The bulbs and weights are sized, so they won’t jam with each other, either by being at least half the size of the tube diameter to retain their stacking order, or as an alternative much less than the tube diameter to freely pass each other in the tube.
The Thermometer is made in the same design as The Weather Glass, and supplements this well.
Galilei Thermometer Brass