Maker's Name: 
NMSI Enterprises Ltd
Where made: 
6.3 × 6.3 × 28 cm

This apparatus illustrates the effect of temperature on the density of liquids. Each of the globes is filled with a liquid and weighted, so that above some particular temperature the globe sinks to the bottom of the liquid column, because the density of the liquid column is higher than the density of the globe assembly. A tag on a globe indicates the temperature above which this begins to take place. The lowest globe left at the top of the column indicates the current temperature of the column of liquid.