Fib.  3. 
-         -  ^J" 
»;     _  ■■^tt?" 
|s"      J>'> 
"'  V 
*3_ 
'7            _  :   
,;                           „,°  g.^"'' 
;  _:,*;***    ..- 
z,v 
<?                       ± 
m 
. 
-= 
/ 
/ 
„?*-                ;,                                     J^15" 
^ 
'*■"  ■          r,             sit 
," 
J^,^                                         |'                           .^^ 
o                               ,->-r          ,„*. 
9                             ,"                             ^< 
5        if  5^ 
-i-                                    4    L-iS"'* 
!a 
3  J        -? 
n^    X'  v      " 
>r 
±          ±                             ft*                4 
"'LUrW  °  s'° 
Fig.  JO. 
J-''                              a                                                                                          „^" 
11                                                                       f  ;gf 
^                                                              '  * 
3-^?;^          '    - 
't                   ~                        _L^_         ■■"      _     " 
