CHAPTER II CAUSE AND ORIGIN OF MIGRATION CHAPTER IV THE HEIGHT AND SPEED OF MIGRATION FLIGHT CHAPTER V ORIENTATION AND ROUTE FINDING CHAPTER VI THE DISTANCES TRAVELLED BY BIRDS CHAPTER VII MIGRATION AND WEATHER CHAPTER VIII THE PERILS OF MIGRATION CHAPTER IX EARLY IDEAS OF MIGRATION CHAPTER X SUGGESTIONS AND GUESSES The Cambridge Manuals of Science and Literature THE MIGRATION OF BIRDSCAMBRIDGE UNIVERSITY PRESS
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