FOREWORD 
(| eae 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 effort 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 Council of Canada 
and Dr. Andrew Thomson of the Air Services Meteor- 
ological Division, Department of Transport, Toronto, 
Janada, 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. 8. 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. 
H. M. McClelland personally established Army co- 
operation, and Lit. Comdr. Ralph A. Krause and Capt. 
Lloyd Berkner were similarly helpful in organizing 
Navy liaison and help. 
Officers and scientific workers of the U.S. Navy 
Radio and Sound Laboratory at San Diego, California, 
altered their program on propagation 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 effective 
cooperation by this laboratory. 
Dr. Ralph 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 Weather Wing, 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. Compton, President of 
Massachusetts Institute of Technology, who was al- 
ways willing to discuss problems 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 
1945, and to Cornell University, which has allowed 
me time off with pay to complete the work of the 
Committee on Propagation since September 1945. 
Cuas. R. Burrows 
Chairman, Committee on Propagation 
