STUDIES 



IN 



Bird Migration 



^t n : J 6'. t 



BY 



WILLIAM EAGLE CLARKE 



Keet>er of the Natural History Department^ the Royal Scottish Museum 



WITH MAPS, WEATHER CHARTS, AND OTHER 

 ILLUSTRATIONS 



VOLUME il. 



LONDON 



GURNEY AND JACKSON 



EDINBURGH: OLIVER AND BOYD 



1912 



