Abstract: A three-dimensional study of cumulus clouds was made by the use of aerial photographs of the clouds and their shadows. The side views of the clouds were obtained from photographs taken from an aircraft at a height slightly ...

Abstract: The calculations of the probability of coalescence between two plane snow crystals is described in detail. As the result of calculation, it was concluded that this probability is minimum when two crystals are of the same ...

Abstract: A simple method has been devised for taking shadow photographs of snow crystals, or of their melt water, without use of a lens. It permits study of the form, size, and mass characteristics at intervals of several minutes ...

Abstract: The ice forming ability of solid particles was tested at ?2 to ?3C after first cooling them to ?35 to ?78C. During the cooling process, the water vapor pressure over the solid particles was kept below ice saturation, in ...