National Geographic : 1952 Aug
271 Charles Payne, N. Y. Daily News A Cloud-seeding Plane above the Catskills Hunts Rain for New York Reservoirs Under special conditions, silver iodide smoke or dry ice particles may trigger reluctant clouds into producing. Western ranchers underwrite rain-making projects, and New York City tried cloud seeding during its water shortage of 1949-50. Scientists still disagree about the effectiveness of such attempts (page 279).