DC - CO-OPERATION WITH OTHER PROJECTS 



It was only natural that the activities of Project Cirrus should stim- 

 ulate others to undertake experiments in cloud seeding. Naturally, consid- 

 erable publicity resulted from Schaefer's historic snow-making flight over 

 Pittsfield in November, 1946. The fact that the Research Laboratory of the 

 General Electric Company was involved took the affair out of the class of 

 cheap sensationalism and provided a background of authenticity that pro- 

 voked the interest of scientists and weather students the world over, as 

 well as others with varying motives of interest. Continuing publicity of 

 further General Electric and Project Cirrus weather research and exper- 

 iment caused further interest. Many inquiries were received asking for 

 information in general, and assistance in particular, in connection with 

 specific projects. No attempt will be made to list all of these, but some 

 are of particular interest. 



PINEAPPLE RESEARCH INSTITUTE, 

 HONOLULU, HAWAII 



On March 24, 1947, a request for dry-ice seeding techniques was 

 received from the Pineapple Institute of Honolulu, Hawaii. Although the 

 records do not show it, presumably the information was needed because 

 of the importance of rain on pineapple growing in Hawaii, and the Insti- 

 tute wanted to keep abreast of any developments. 



t At any rate, available information was supplied by Project Cirrus. 

 Later newspaper accounts were received at Schenectady describing ex- 

 periments carried out over the island of Molokai in 1947 by Dr. Luna 

 B. Leopold and Mr. Maurice Halstead. Still later, copies of a prelim- 

 inary report'2°^) were received from these men, describing interesting 

 results obtained by dumping dry ice into cumulus clouds having a tem- 

 perature above the freezing point. 



r 



Particular interest attaches to this activity, because the result of 

 Leopold and Halstead prompted Dr. Langmuir to restudy some theoretical 

 calculations he had prepared in 1944 at Mt. Washington. Asa conse- 

 quence) he developed his famous theory of the chain reaction of a rain- 

 storm described on a preceeding page. (page 43). 



MILLIKEN & FARWELL 

 MOBILE, ALABAMA 



For two or three seasons somewhere about 1947 or 1948 inter- 

 esting experiments were conducted in the cloud seeding of thunderstorms 

 with dry ice by the firm of Milliken & Farwell, a sugar company of Mo- 

 bile, Alabama. Activities concentrated on big cumulus clouds in the 

 neighborhood of the Mississippi delta. 



