MIGRATION 



CHAPTER VI 



Dr. Eagle Clarke's " Studies in Bird Migration." 

 Ancient Beliefs. The "Hibernation" Theory. Trans- 

 mutation. WiLLUGHBY AND EdWARDS. MODERN ViEWS. 



Fly lines. Long Distance Flights. Whence antd 



Whither ? Motives that Lead to Migration. How 



are Migrants Guided ? Memory and Parental Guidance. 



Magnetism of the Earth. The Ancient Wisdom. 



From the earliest recorded days the minds of 

 deep thinkers, poets, and philosophers alike, 

 have been attracted to the subject of migration. 

 Job, Jeremiah, Homer, Anacreon, Aristotle, Pliny, 

 all paused, either to draw from this fact in 

 nature some illustration of the power of the 

 unseen, or to seek scientifically for the conditions 

 of the fact itself. 



The problem presented itself in the following 

 forms : Yesterday the land was deserted : to-day 

 the trees are filled with strange singing birds, 

 and the swifts and swallows overspread the sky. 

 Whence do they come ? Why do they come ? 

 How have they learnt so accurately the right 

 time to arrive ? Steering without chart or com- 

 pass, how do they find their way ? 



So far as the Scriptural writers are concerned, 

 latter-day science would appear to have little to 



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