10.0- 11.0- 12.0- 14.0- 17.0- 

 10.9 11.9 13.9 16.9 LONGER 



PERIOD, SEC 



B.9 7.9 



PERIOD, SEC 



10.0- 11. 0- 12.0- H.O- 17.0- 

 10.9 11.9 13.9 16.9 LONGER 



Figure B9 . (Concluded) 



B28 



