Science: Better Rainmaking

The art of rainmaking got a bad setback more than a year ago when the Air Force and the Weather Bureau spewed quantities of dry ice into juicy Ohio clouds and produced hardly any rain (TIME, Dec. 6, 1948). But Nobel Prizewinner Irving Langmuir, leading backer of scientific rainmaking, is notably hard to discourage. Last week he told a Manhattan meeting of the American Meteorological Society and the Institute of Aeronautical Sciences about more successful experiments in New Mexico.

Rainmaking, Dr. Langmuir explained, is not a matter of dumping dry ice into any likely-looking cloud. It works only when conditions are absolutely...

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