1.   It was inflated with liquid rubber monomer under its own vapour pressure.

2.   The inert gas argon is added to help to start the discharge because the vapour pressure of the mercury is very low.

3.   When equilibrium is attained, the temperature difference between the two drops T is a measure of the extent of the vapour pressure lowering by the solute.

4.   The pressure exerted by these escaping particles is called the vapour pressure of the liquid.