A method for the determination of gas solubilities in liquids is described which allows the solubility to be measured in repetitive experiments on the same solution at various pressures so that the solubility is determined on the basis of a series of points rather than on a single gas absorption measurement. The gas can be readily changed, keeping the same solution, which facilitates comparison of solubilities of a series of gases in a given solution. Saturation equilibrium can also be easily approached from both directions, viz., from supersaturation or initial unsaturation, thus enabling true saturation solubility to be verified. The method is especially suitable for salting-out determinations.