Cloud particles, drops or ice crystals, are collected during flight on a forward facing optical flat and video recorded from behind through  a microscope X 5 - 20. The particles are melted or evaporated by heating  to leave a residue originating either as the initial nucleus or as scavenged  ambient aerosol. The residue is recycled (simulating atmospheric processes) by reducing heating of the collecting surface, until cooling below ambient dewpoint redissolves the hygroscopic component. It is then reheated  and evaporated until nucleation and growth of the solute occurs. The growth rate and crystal morphology of the solute crystal provides information on the solute itself and on the supersaturation. This  procedure also identifies any visible insoluble component, with resolution down to a few microns. Further cooling below the ice nucleation point leads to supercooling until ice nucleation occurs at a critical temperature. Results show  variability of the insoluble and soluble component and the amount and potential  importance of nucleation hysteresis  in visibility. Detailed analysis of the video gives further information on the shape, size and density of the collected ice particles and their propensity to cleanse the atmosphere through aerosol scavenging during growth.