FOREWORD TO CONSOLIDATED EDITION 
Seer and engineers in the field of radio wave propagation are indebted 
to the Academic Press for making available to them this condensed volume 
of the entire report of the Committee on Propagation of NDRC which other-, 
wise would only be available in the two hundred and fifty copies of the three- 
volume report printed for the government. This volume contains material 
of great value to present and future studies of the problems encountered in the 
propagation of radio waves not otherwise available to the public. 
The results of the work of the Comimttee will eliminate repetitive steps 
in many instances, and will serve as fundamental data in the approach to 
future investigations. Furthermore, the text of Volume 3, complemented by 
the contents of Volumes 1 and 2, may be easily adapted to classroom use. 
The declassification of the Summary Technical Report makes it possible 
to publish this consolidated edition of the three volumes. It will, in my 
opinion, fill a need for the greater distribution of information essential to 
further developments in the field of radio wave propagation. 
Cuas. R. Burrows, Director, 
: School of Electrical Engineering, 
Cornell University, Ithaca, New York 
October 15, 1948 
