1956 Volume 7 Issue 2 Pages 99-106
Many supercooled water-droplets were frozen on a cooling brass plate to find the effects of artificial rainmaking. The water-droplets were contaminated with silver iodide smoke and some soil and mineral powder. As shown in Tables 1 and 2 the freezing temperature was found for each contaminated substance. Freezing temperature of melted snow crystals was observed.