z 



t^ ICJ 



g IS- 



1.0- 3.0- ^.O- 5.0- 



5.0- 7.0- 8.0- 9.0- 



10.0- 11.0- 12.0- 14.0- 17.0- 



2.9 3.9 4.9 5.9 



6.9 7.9 8.9 9.9 

 PERIOD, SEC 



10.9 11.9 13.9 16.9 LONGER 



8 ■ 



^ 10- 



B.O- 

 8.9 

 PERIOD, SEC 



9.0- 

 9.9 



10.0- 11.0- 12.0- 14.0- 17.0- 

 10.9 11.9 13.9 16.9 LONGER 



Figure B8. (Concluded) 



