A newly developed laser light scattering technique was tested for the determination of cloud-point curves in polystyrene + cyclohexane and in polystyrene + methyl acetate systems at moderate pressures. The solubility data were determined for molecular weights of polystyrene of M x 10(-4) = 9.0 and 19.0 for the cyclohexane system, and of M x 10(-4) = 70.6 for the methyl acetate system at temperatures up to upper critical solution temperature. The experimentally determined cloud points were satisfactory correlated by Flory type models.