Word: straten
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...well-known silver iodide and Dry Ice methods of cloud precipitation work only on clouds that are well below freezing. Warm clouds are common,too. and Dr. Florence W. van Straten of the Naval Weather Service reasoned that they should precipitate if some of their droplets could be made warmer than the others...
...problem was how to heat the droplets differentially. Dr. van Straten solved it with carbon black, which is a fluffy kind of soot whose intensely black particles, about 500.00 in diameter, accumulate radiant heat just like a blacktop road. When these particles are released in a cloud, she reasoned, the water droplets that capture one or more of them should grow warmer by absorbing sunlight, and should lose their moisture by evaporation to droplets that have stayed comparatively cool because they have captured no particles. Then the cool, fattened-up droplets should fall slowly through the cloud, growing gradually bigger...
COUNT VAN DER STRATEN-PONTHOZ Belgian Ambassador Belgian Embassy Washington...
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