The physical investigation of certain hygroscopic aerosols

Abstract

The general predictions of the Mie theory of light scattering in the range of particle diameters 0·1 to 2·0μ for transparent spheres have been found to hold good for hygroscopic screening smokes, when a simple treatment of inhomogeneity is used. A critical discussion is given and applied to simple propellant smokes, which have also been studied by sedimentation methods. These have been shown to behave, in general, as hygroscopic smokes, although their chemical nature is much more obscure than for screening smokes. The work is published by permission of the Chief Scientist, Ministry of Supply.