Word: cirrus
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...Weather Bureau chief F.W. Reichelderfer praised the plans of Wallace Howell '36 to relive the New York water shortage in an announcement yesterday. The $50,000 "Project Cirrus" will get its first test tomorrow if there are suitable clouds over the Catskills...
...Mexico experiments were done by Project Cirrus (sponsored by the Army Signal Corps and the Office of Naval Research in consultation with General Electric Research Laboratory), and the experimenters tried a more subtle method...
Chain Reaction. Last July 21, said Langmuir, the Albuquerque weather forecast predicted no substantial amounts of rain. But at 5:30 a.m. Project Cirrus' ground generator (a gadget for releasing silver iodide smoke) started a day-long run. About 8:30 a.m. a big cloud formed down wind from the generator. At 9:57, a chain reaction started inside it, filling the cloud with raindrops that showed on a radar screen. Lightning flashed, thunder rolled, and heavy rain fell over a large area. Later thunderstorms near by watered other parts of New Mexico...
...Langmuir, now 68, will continue to be a G.E. consultant. He will go on working with Dr. Vincent J. Schaefer on Project Cirrus, the experiments in seeding clouds with chemicals to produce rain, and will dabble in whatever else interests him. Says the man who is still inquisitive: "Whatever work I've done, I've done...
With low-hanging stratus (i.e., solid layer) clouds, Project Cirrus was just as successful. Langmuir told how the planes had drawn Greek letters and "racetrack" patterns in stratus clouds by dropping small amounts of dry ice (see cut). Sometimes the cloud was dissipated so completely that blue sky showed through the gaps. Langmuir believes that dry ice can be used to clear clouds from over airports...