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THE 
FLIGHT OF BIRDS. 
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By Fi W: HEADLEY, M.B.O.U. 
Author of “The Structure and Life of Birds ” 
* Life and Evolution” &c. 
WITH SIXTEEN PLATES 
AND MANY TEXT-FIGURES 
‘ ——— 
REA4L4S 
WITHERBY & CO. 
326 HIGH HOLBORN LONDON 
1912 
