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BELL SYSTEM TECHNICAL JOURNAL 



adverse mutual reactions and it requires that attention be given to the 

 losses in the connecting transmission lines, which are by no means 

 negligible. Operating economies suggest concentrating all the trans- 

 mitters at one point but the cost per kilowatt hour of modulated 

 high-frequency power must be taken into account when considering the 

 use of long transmission lines. It should be recognized, of course, that 

 in the early applications of a comparatively new art, it is impossible to 

 approach anything like accurate evaluation of all the factors entering 

 into economic balances and furthermore very considerable weight 

 needs to be given to the probable future trend of developments. 



M4.4M 



TRANSMITTING STATION 

 AMERICAN TELEPHONE & TELEGRAPH CO 

 LAWRENCEVILLE N.J. 



32.7 M GREAT CIRCLE 



TO LONDON 



30.7 M 



20.7 M 



5.6 M 



Fig. 6 — ^Arrangement of antennas at Lawrenceville transmitting station. 



At Lawrenceville all of the antennas for the three channels to Eng- 

 land are arranged in a straight line about one mile long. The direction 

 of this line is perpendicular to the great circle path to Baldock, England, 

 where the signals are received, (Fig. 6). The antennas for the fourth 

 channel are similarly arranged in a line 1500 ft. long and they are 

 directed for transmission to Buenos Aires, Argentine. 



Placing several antennas in a single line reduces the cost of the sup- 

 porting structure, and all the antennas have a clear sweep in the direc- 

 tion of transmission. By locating them in proper sequence with re- 



