HOMOGENEOUS BEAMS 165 



00 OOOO-* OOOO 5<NO t^ 



<N 000 00t^ 00505 rH 



^nOSiO Oi-iO'-' O 

 CS<NOO kOCOOOOO O 



2 S 



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<NOCO C005-ICO 05 

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555 5555 5 



CCCOCOCO -^ 



O O5-<*<a> Q-I-* -*eceo co 

 O O'-HOOO 5iOQ IOO--I O 



5 555^ 555 55 5 



5 5555 555 555 5 



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