867 resultados para 2nd half of the 19th century
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Mode of access: Internet.
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"The biographical part was written by Mr. Dibdin."--Lowndes, The bibliographer's manual of English literature.
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Mode of access: Internet.
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Followed by her Victorian age of English literature.
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Translation of Die Welträthsel.
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Mode of access: Internet.
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Mode of access: Internet.
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"Bibliographical notes": p.156-159.
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Vol. 2 has imprint: New York, Dodd, Mead and company, 1896.
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Mode of access: Internet.
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Mode of access: Internet.
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Bibliography: p. xix-xxiv.
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Thesis (Master's)--University of Washington, 2016-06
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The 'Columbus hypothesis' suggests that the annual north-south return migration of Danaus plexippus in North America is a very recently evolved behaviour, less than 200 years old. This hypothesis rests, in part, on an analysis of the 19th century spread of the monarch across the Pacific that assumes a continuous east to west movement and is based predominantly on one publication. We review all the contemporary literature and present new analysis of the data. The movement of the monarch across the Pacific in the second half of the 19th century is best explained by a model which involves no more than three spot introductions, directly or indirectly aided by human movement, followed by natural spread of the monarch across island groups. Contemporary records refer to 'boom' and 'bust' population cycles on newly settled islands, which may have led to high rates of monarch movement. We see no evidence in the records to suggest an east to west sweep by monarch populations as suggested by the Columbus hypothesis. (C) 2004 The Linnean Society of London.