42 



PROCEEDINGS OF THE 









iC CO 00 Ol OS tP (M »0 t^ CO 



h h *-' b"^*^^^ *-^- 



rt n f*i - TO pij TO TO rt CL Cu 



sg-5' 



to -^ -^ t- c- as t^ 



C^ 1— I ^ ,-, C-l rH 



CU rt TO rt CL « TO 



O CQ 



a 



R TO n TO TO o^ ' 



iMCOCOt^O(M<NC^iCCO t^iCMiCC^ -'O 'C^W 

 l-l G^(N--H.-11— t ?-4 (M l-t .-I' *1— !,-( 



K-i f-l t-l ^j fj I"-! I^~, ^— » __ 



c c 

 o 



»OOi •OOCOOO '(M 'IM '(MlO '(M-^IO 



l-H • C^ 







a :<; :ss 



' t-i t^ L^ 



• o- o. a. 



:s;§s 





£'1 



ii 



& 



w 



W rH 00 r-H 





rt TO TO ' Qj Qj Qj 



O T-< O C^T lO • C^ O 



.-H t-H 1-( l-l C^l - i-H rH 



t-* t-i >-» >-. t^ • t^ >> 



pJ c3 cS rt p- * o! rt 







<! ::s;s 





m 



60 



cc S o 



at t- c3 t= 



bo c^ ci- ci 



p tp 



- n C 0-_ a* S - '"'^ •" 



s 





•s& 



fc 



OS • ;- 

 X £t5 



OJ K 



= -9rr. >■-■ 



■.^§^"^.&i^^^ 



O J3 







"si 



— 13 •- ^ " 



^^ i ^ i 



0) 



o 



■a tt'"? 

 <p c n 







^ ~ "3 .^ J 



11 



O ' 



■S J« Oi ?: p; ;S (i; 



