The sorption of gases by solids : the solubility of water vapour in solid inorganic compounds at high temperatures.

It is a we11 known fact that the last traces of water of crystal11zation are often very difficult to remove from a substance even when the hydrate gives a definite vapour pressure. A reasonable supposition 1s that this difficulty ie due to the retention ot a portion of the water by the solid in the form of a solid solution or as a condensed layer of gas on the surface. [...