Abstract
An apparatus for the determination of the size distribution of an heterogeneous aerosol is described. The apparatus employs two diffusion batteries (series of narrow rectangular channels) through which an aerosol sample is passed to obtain attrition of its particle population by diffusion to the walls of the channels. Observations of particle concentrations after successive stages of “decay” produce a decay curve which represents an integral transform of the distribution function with respect to diffusion coefficient. After mathematical manipulation the size distribution of the aerosol is obtained.
