Cumulus Studies -54- 



'of rainfall in many places. It may have been dependent on the 

 silver-iodide nuclei generated near Albuquerque between July 

 18 and 21 and in central Arizona between July 19 and 21. 



''Furthermore, the heavy rains that spread throughout New 

 Mexico from July 9 to 13 before the start of Project Cirrus 

 seeding experiments appear to have depended on silver -iodide 

 seedings in Arizona on July 5 and 6. 



"It is very important that regular tests on certain selected 

 days of each week be carried out throughout the year, using 

 amounts of seeding agents just sufficient to obtain conclusive 

 statistical data as to their effectiveness in producing widespread 

 rain. It is to be expected that the results will vary greatly in 

 different parts of the country, because of the changes in synoptic 

 situations." 



The significance of the two test projects at New Mexico is thus apparent. 

 They indicated not only the possibilities of silver -iodide seeding from the ground, 

 but they suggested a widespread effect on the weather of the nation. And, as a 

 result, the project conducted some experiments in periodic seeding which were 

 destined to have a profound--and controversial—significance. 



