144 



Eric C. Hellgren and Michael R. Vaughan 



■S B 

 .a z 



o 



o 



^ O 



« .2 



r ^ to/) 



R 



•oooo^oin^^oio^noooN-i 



rjONoor^r-oom^H^noooN' 





jNh^NMtnhHOOoOp; 



^00tn*OO(NTt^HHHH° 



T3 O O 



OO £ U "O T3 O X X 



O X X X T3 BJ XI O O OX) 03 03 







oor-r-oor-^Hir)(NrNirNir^'* 



~ m ^ ca ^ ^ 



on>oo\0*oo\a^M^XH 



CJT3 O X "0 X O O T3 O OX O 



OOVOM(NHVOrHMM(NNn^ 



(N m <— i i— i 



'intni-otirno^ooMJihK 



"O O T3 O O OT3T3 O T3 T3 O "O 







m o o\ 

 d th © 



CN in On 





CN O 



d <-i 



■«t m on in 



d d oi oo 



^H ^H lO Tfr 



en ■* 



ci ^6 





u xi "5 -^ r n _, 









c x 





u s g § g M 





X 







£ S - x 

 _^ bo ooxi -s -s t: 





m x; 





x T3 -a 



o£^£ J g 





c ^ 

 o 'kT 



oho 



.s£.s 





ine Wid 

 wer) 

 ine Bre 

 per) 

 ine Bre 

 wer) 



w -3 X) ^ to to o 



* £ £ 1 1 ^ 



c cd c3 2 2 u 

 g a. a, o- »< e 



u 



Oh 



o 

 O. 



J2 o o u jb ►t: £ 



S H ffi Z U ^ W 



&o c S c c c 



Oh 



cog 



o. 



c c a. c o 



^ o o • -3 a <* 



N pl, b £ E U 



D 



udu 



p 



CO 1 CO ' — ^ CO T 



