THE MIGRATION OF BIRDS. 



■ X X X" 



XX XXXXX X,XXX XXw 



-K-f-H-X XXXXX XX+- X y 



XX XXXXX X XXX XX-:: 



XXXXX X = 



XXXXXX XXXX X Z. 



XXXX XX XXXXX XX. E 



X XXXXXXX XXXX XX rt 



XXXX XX XXXXX xxr 



^XXXXXX XXXX X jj 



XXX. ...XX . XX X X .X . - 



X ^x^:: XX X XX X- xx2 



XXX* •••XX • XX X X 'X •= 



X . . . . . c 



xx-'X---x-x-xxxx-xx--xx-: =„; 



X • • .^3 



': \ \ '• ■ '• \ '■ '• >^ \ '• • \ \ • '• y- \ \ '• ': \ ^ \ \ ': -^ I 





5: ^■^ . ^ I- 







!l-lil2iil5IM^Iil1l|si 



X r — 



P ^!^0 — j^Oj'"^-'^"^'^ ' " " •- ^- f^ -^. -J' . . r. . ^ !_ r^ 



X . X .... X 



XXXXX -XXX X -X • • • XXX 



X • X • • • ■ X 



X .XXXX xxxxvxxxxxx X X 



XXX- XX ^ XXX 



X "XXXX XXXXxXXXXXX X X 



XXX X -z 



X X XXXX XXXX xxr* 



XXXX-!-XXXX XX XXX 



X X XXXX XXXX XX..: 



XXX X ^ 



X X X X X-T--i--i-X X ^ -. — i-^-i- 



X j_ X X 



,_:_.: ^.:_.^ X X^.:_.; :__:_ Xj_^ X^ 



-i--r- -i- ' 4- 



T 



