\ r, DEC 21 



N^TURAL 



Fig. 7. 



GREATER BELFASl^ 



Dotted Lit;t' AreA> lye-yiird for Ccr^trol. 



a\Wyt H-l-Rc>^-v. Tm. 



Greatkr I^klfast. 



See p. 15 



