RADIO BROADCAST COVERAGE OF CITY AREAS 141 



practicable to accomplish this result completely, it is hoped that a 

 better understanding of the interference problem as here outlined and 

 of the mutual advantage to be gained in reducing interference will 

 lead naturally to a better coordination of radio broadcast stations. 



Acknowledgment 

 The data and analyses presented in this paper are the result of the 

 cooperative effort of a number of engineers in both the American 

 Telephone and Telegraph Company and the Bell Telephone Labora- 

 tories, Inc. In assembling and presenting the material the writer is 

 acting merely as the spokesman for these development groups. He 

 wishes to acknowledge his indebtedness to his colleagues, particularly 

 to those who have directly participated in the survey work described 

 and assisted in the preparation of the paper, namely, to Messrs. 

 D. K. Martin, R. K. Potter, G. D. Gillett and H. B. Coxhead, and to 

 Messrs. S. E. Anderson and O. O. Ceccarini of the Bell Telephone 

 Laboratories to whom is due the measurement work upon the radio 

 receiving sets. 



