Abstract
The Warren-Nesbitt generator is widely used in Australia and other countries for producing a cloud seeding aerosol by burning a solution of silver iodide and sodium iodide in acetone. It is found that the particle size distribution follows a log probability law with median diameter 0.085 μ and standard deviation factor 1.47. Electron diffraction examination of the particles shows that they consist of beta silver iodide and sodium iodide. The available evidence indicates that each particle is probably a mixture of these two constituents.
