IV - LABORATORY STUDIES 



The interest and activity in cloud seeding and the fundamental physics 

 of clouds, following the initial experiments, were so varied that it is diffi- 

 cult to. give an orderly account of the progress in this field. Research both 

 in the laboratory and in the atmosphere continued to reveal new and inter- 

 esting facts. The contents of this section of the history consist of summaries 

 of the more important laboratory studies in this field which were conducted 

 by the Research Group of Project Cirrus. 



PERSONNEL 



It would be difficult, if not impossible, to list the names of all the 

 people contributing to the laboratory studies of the project. Eut twelve 

 persons should be mentioned who took part, either continuously through- 

 out the life of the project, or at one time or another during its existence. 



Dr. Irving Langmuir , under whose direction the project evolved, 

 planned the methods and techniques for the various programs, analyzed 

 flight results, and set up procedures for the routine analysis of such re- 

 sults. He also reduced to convincing mathematics many of the theories 

 evolved. 



Dr. Vincent J. Schaefer , who worked with Langmuir in the planning 

 of the project, carried out both field and laboratory experiments on the 

 fundamental processes involved in changes of cloud forms. 



Dr. Bernard Vonnegut also carried out extensive field and labora- 

 tory experiments on subjects associated with the project. Particularly 

 he concentrated on theories and techniques associated with the use of 

 silver iodide for seeding. 



Raymond E. Falconer worked on various phases of instrumentation 

 of the flight planes, on laboratory studies, and on other related problems. 

 He worked closely with Langmuir in his periodicity studies. After the 

 termination of the Operations Group, the establishment and maintenance 

 of a weather station in the Knolls penthouse was his primary responsibility. 



Victor Fraenckel served as General Electric representative on the 

 Steering Committee and as contract liaison. 



Kiah Maynard was the Research Laboratory representative on all 

 flight tests and on the Operations Group when it was active. He gathered 

 data and maintained records of all flight tests. He was associated with 

 Falconer in the operation of the weather station at the Knolls penthouse. 



