Abstract
Using a simple drop-freezing technique as in earlier studies, the ice nucleation activities of certain iodide and iodate systems, with and without soluble salts, have been investigated. It has been found that, of the systems tested, the iodide systems commonly used in the conventional cloud seeding, which are AgI.NaI and AgI.KI, are the least active. Also, the iodate system used in the pyrotechnic seeding, which is AgIO3+KIO3, is not the most active. Better nucleating systems have been named for possible use in both the types of seeding. The comparative activities noticed of the systems tested have been explained on certain qualitative considerations.
