A centrifugal field can cause migration of solvent inclusions in crystals, both by the preferential sedimentation of the denser solute ions and by diffusion across the concentration gradient caused by the variation of solubility with pressure. The two mechanisms can act either in the same or in opposite directions so that both centripetal and centrifugal migration are possible. Aqueous inclusions in KI were observed to move centripetally at about 0.05 mm/h at room temperature in centrifugal fields of 210 000 G; at higher temperatures the direction of migration was reversed. Inclusion movement was also observed in KCl and Pb(NO3)2. Plastic deformation, cracking, and changes in inclusion shape were also encountered.