bird-counts of the North Atlantic crossing have already appeared, and in these the significance of the figures has been fully discussed. The most comprehensive is by V. C. Wynne-Edwards (Proc. Boston Soc, Nat. Hist., Vol. XL., No. 4, pp. 233-346. January, 1935), who crossed eight times between May and September, 1933, and published the results in great detail. It is not proposed, therefore, in thi...

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