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It is a common misconception that pure water freezes at a temperature of zero celsius (32 degrees Fahrenheit). Zero celsius is actually the temperature at which ice melts. Water freezes at a temperature between 0 and -39 celsius, depending on the type of nuclei (i.e., contaminants) present. Liquid water with a temperature of less than 0 celsius is called "supercooled water".
In November 1946, Dr. Bernard Vonnegut discovered that microscopic crystals of silver iodide (AgI) nucleate water vapor to form ice crystals. Vonnegut choose AgI crystals because there is nearly the same distance between molecules in the crystal lattice for both ice and AgI, which makes AgI the optimum material to nucleate ice. (Vonnegut, 1947) Vonnegut's discovery is a classic example of doing the right thing for the right reason at the very beginning of new technology, as a result of scientific knowledge.
It is commonly stated that cloud seeding was invented in 1946 by employees of the General Electric Research Laboratory. This "fact" is wrong. There were at least three earlier scientific attempts to modify weather:
Prof. Emory Leon Chaffee at Harvard University dispensed charged sand from an airplane during 1924, to attempt to modify weather. (McDonald, 1961)
W. Veraart in 1930 dropped dry ice into clouds, in an attempt to modify weather. His technique and results were apparently published only in his book, which was in the Dutch language. (Byers, 1974, pp. 5-6)
Prof. Henry G. Houghton of MIT sprayed hygroscopic solutions into fogs in 1938 to dissipate the fog.
What does it have to do with "chemtrails"? Cloud seeding occurs within existing cumulus clouds. It does not create clouds. Cloud seeding occurs in localized areas. The idea is to induce precipitation.
Then, posterB, who is the OP here, reads that thread, copies the link, and posts it as another thread, ignoring the search function of course, and goes on to assume the information admits "chemtrails are real" when in fact is says nothing of the sort, and merely proves all of us "debunkers" right as we've been desperately trying to explain this to you guys for years. Seriously, stop and at least read the stuff you post, if not understand it, it will save all of us some time.
The aim of the regulatory function is to ensure that various methods of modifying the weather do not dissipate clouds nor inhibit their ability to produce rainfall to the detriment of people or property in the affected areas.
Originally posted by Phage
Cloud seeding has been "admitted" for quite a few years now. You can read all about the operations of one organization here:
wtwma.com...
What does it have to do with "chemtrails"? Cloud seeding occurs within existing cumulus clouds. It does not create clouds. Cloud seeding occurs in localized areas. The idea is to induce precipitation.
"Chemtrails" which are actually contrails, often occur in clear skies. They occur at altitudes much higher than those at which cloud seeding is done.edit on 11/21/2011 by Phage because: (no reason given)
Originally posted by GoldenRuled
Weather Modification Regulation
All individuals and organizations intending to conduct weather modification activities are required to obtain a weather modification license and permit from the TDLR. George Bomar (512-936-4313; [email protected]) is the contact person at TDLR for information on, and assistance with, the licensing and permitting of weather modification operations.
The program also sponsors and provides administrative and technical oversight for ongoing weather modification research and development activities. This includes the use of federal grants for exploratory, and confirmatory, cloud seeding experiments. TDLR issues reports on the results of cloud seeding research work and shares information on technological advances with other State agencies, governmental organizations, and interested individuals.