ULTRA-SHORT-WAVE TRANSMISSION 



499 



operating on a circuit of the Patchogue division of the Long Island 

 60-cycIe power network. The resulting timing was faultless and by 

 transmitting the same radiation on crossed antennas, and receiving the 

 vertical and horizontal components separately, a comparison was 

 obtained. 



In general the horizontal component showed the worse fading, more 

 fades per minute and greater amplitude range. This was always true 

 when the fading on vertical polarization was bad. There was then no 

 noticeable coincidence between the two. When the fading had a 

 smooth long period fade, or "roller," superposed on a short period 

 oscillation, or "fine structure," there was at times coincidence between 

 the roller components. Occasionally, with fine structure absent and 



9:30PM lOOOPM 



Fig. 6 — Composite bad fading, horizontally polarized transmission. 



