THE MIGRATION OF BIRDS 



A CONSIDERATION OF HERB GATKE'S VIEWS. 



ERRATA. 



Page 2, line 10, for "attitude" read "altitude." 

 ,, 19, ,, 16, for " Anglica " read " Anglia." 

 28, 7, for "west" read "east." 

 32, 21, for "Ochotok" read " Ochotsk." 

 ,, 118, ,, 24, delete "may." 

 ,, 131, ,, 18, for "parties" read "partner." 



the general opinion Held bylhe majority ot naturalists. 



This chapter also contains his remarks on the character or 

 breadth of the migration front, in which the flight is performed. 

 As the two subjects are intimately connected, his observations on 

 both may be conveniently examined at the same time. 



It has been previously more or less generally assumed, that the 

 direction of the migratory flight in spring and autumn is approxi- 

 mately between the points of north and south. Whilst Herr Gatke 

 fully recognises a movement of this description it seems to him, as 

 may be gathered from his constant references, to be quite over- 

 shadowed in importance by an east to west flight or the reverse 

 1 



