FOREW.ORD 



THE SUCCESS of the propagation program was the 

 result of the wholehearted cooperation of many in- 

 dividuals in the various organizations concerned, not 

 only in this country but in England, Canada, New 

 Zealand, and Australia. The magnitude of the research 

 work accomplished was possible only because of the 

 willingness of the workers in many organizations to 

 undertake their parts of the overall program. In fact, 

 the entire program of the Committee on Propagation 

 was carried out without the necessity of the Committee 

 exercising directive authority over any project. 



Dr. Hubert Hopkins of the National Physical Labo- 

 ratory in England and Mr. Donald E. Kerr of the 

 Radiation Laboratory at the Massachusetts Institute 

 of Technology, who were working on this phase of the 

 war eflfort when the Propagation Committee was 

 formed, were instrumental in giving a good start to 

 its activities. The largest single group working for the 

 Committee was under Mr. Kerr. 



The existence of a common program for the United 

 Nations in radio-wave propagation resulted from the 

 splendid cooperation given the Propagation Mission 

 to England by Sir Edward Appleton and his Ultra 

 Short Wave Panel. Later, through the cooperation of 

 Canadian engineers and scientists. Dr. W. R. Mc- 

 Kinley of the National Research C'ouncil of Canada 

 and Dr. Andrew Thomson of the Air Services Meteor- 

 ological Division, Department of Transport, Toronto, 

 Canada, undertook to carry on a part of the program 

 originally assigned to the United States. The program 

 was further rounded out by the willingness of the New 

 Zealand Government to undertake an experiment for 

 which their situation was particularly favorable. Dr. 

 F. E. S. Alexander of New Zealand and Dr. Paul A. 

 Anderson of the State College of Washington initiated 

 this work. Needless to say, the labor of the Committee 

 on Propagation could hardly have been effective with- 

 out the cooperation of the Army and Navy. Maj. Gen. 

 II. M. McClelland personally established Army co- 



operation, and Lt. Comdr. Ralph A. Krause and Capt. 

 Lloyd Berkner were similarly helpful in organizing 

 Navy liaison and help. 



Officers aud scientific workers of the U. S. Navy 

 Radio and Sound Laboratory at San Diego, California, 

 altered their program on proi^agation to fit in with the 

 overall program of the Committee. Capt. David R. 

 Hull, Bureau of Ships, understanding the importance 

 of the technical problems, paved the way for efEective 

 cooperation by this laboratory. 



Dr. Rali^li Bown, Radio and Television Research 

 Director, Bell Telephone Laboratories, integrated the 

 research programs undertaken by Bell Telephone 

 Laboratories for the Committee on Propagation. This 

 joint research program included meteorological meas- 

 urements on Bell Telephone Laboratories property by 

 meteorologists of the Army Air Forces working with 

 Col. D. N. Yates, Director, and Lt. Col. Harry Wexler 

 of the Weatlier AA'ing, Army Air Forces. The accom- 

 plishments of the Committee on Propagation are a 

 good example of the effectiveness of cooperation — all 

 parts were essential and none more than the rest. 



I want to thank Dr. Karl T. Comptou, President of 

 Massachusetts Institute of Technology, who was al- 

 ways willing to discuss jiroblems of the Committee and 

 who helped me to solve many of the more difficult 

 ones, and also. Prof. S. S. Attwood, University of 

 Michigan, whose continual counsel throughout my 

 term of office was in no small way responsible for the 

 success of our activity. 



Credit is also due Bell Telephone Laboratories, 

 which made my services available to the Government 

 and paid my salary from August 1943 to September 

 194.5, and to Cornell University, which has allowed 

 me time ofl: with pay to complete the work of the 

 Committee on Propagation since September 1945. 



Chas. R. Bdruows 

 Chairman, Committee on Propagation 



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