ABSTRACT
Artificial precipitation of moisture from the atmosphere has been a tempting subject for scientific attention because the atmosphere is naturally the most mobile part of all the earth's water supplies. It also has been attractive because recharge of water into the atmosphere is automatic, consequent upon the evaporating and vegetative transpiration effects of energy received from the sun. One of the most beneficial water projects conceivable would be a redistribution of precipitation from the atmosphere either geographically or in time, or both. Probably no basic change in the rate of total moisture moving into and out of the atmosphere in the hydrologic cycle would be possible without significant changes in the solar energy received. But temporal or geographical redistribution of rain, snow, and hail for some time has appeared to be a problem worthy of scientific attention.
