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BELL SYSTEM TECHNICAL JOURNAL 



experience seems to show that wave direction variation has Httie cor- 

 relation with the field strength of signals. 



Fig. 4 — An automatic signal recorder. 



Static Reduction 

 Referring again to Fig. 2, assume that point A, receiving from B, is 

 surrounded in all directions by static of uniform intensity. If A is 

 made responsive only in the shaded directions, half of the static appears 

 at first, to be eliminated, but we must remember that, by previous argu- 

 ments, the static output from the shaded region is doubled; thus the 



