Abstract
Vapour pressures of sea water and brine were obtained using dry and wet-bulb temperatures of hygrometer. The method is based on the fact, the principle that the wet-bulb thermometer of a hygrometer stands at an equilibrated temperature because of the vapour pressures on the wet-bulb and surrounding air, should hold true when the wet-bulb is wetted by sea water and brine.
An empirical formula was obtained on ratios of vapour pressures of sea water and brine, under normal temperatures and different densities against those of fresh water at saturation.
Accordingly, it was found possible to calculate the vapour pressures of sea water and brine from fresh water vapour pressures.
