B 



W 



F-X 



F-9 



F-ll 



F-U 



F-3 



F-5 



F-6 



F-15 



Figure 132. Apples colored by artificial light. A, B, W, P, and C described in text. 

 F-X through F-15: Apples exposed for 5 days ending September 14th to mercurj' vapor 

 arc in Uviol using various filters. In all cases the filters increased in effectiveness as their 

 transmission in band 312 to 290 m^ increased. 



