Tropical Nature, and Other EssaysMacmillan and Company, 1878 - 356 pages |
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Page xii
... Variation - Humming - Birds of Juan Fernandez as illustrating Variation and Natural Selection - The Relations and Affinities of Humming - Birds - How to Determine Doubtful Affinities -Resemblances of Swifts and Humming - Birds ...
... Variation - Humming - Birds of Juan Fernandez as illustrating Variation and Natural Selection - The Relations and Affinities of Humming - Birds - How to Determine Doubtful Affinities -Resemblances of Swifts and Humming - Birds ...
Page 1
... of winter , are constantly recurring phenomena which represent to us the estab lished course of nature . At the equator none of these changes occur ; there is a perpetual equinox and 73 B a perpetual summer , and were it not for variations.
... of winter , are constantly recurring phenomena which represent to us the estab lished course of nature . At the equator none of these changes occur ; there is a perpetual equinox and 73 B a perpetual summer , and were it not for variations.
Page 2
Alfred Russel Wallace. a perpetual summer , and were it not for variations in the quantity of rain , in the direction and strength of the winds , and in the amount of sunshine , accompanied by corresponding slight changes in the ...
Alfred Russel Wallace. a perpetual summer , and were it not for variations in the quantity of rain , in the direction and strength of the winds , and in the amount of sunshine , accompanied by corresponding slight changes in the ...
Page 10
... variations of temperature in the temperate zone . It is this large quantity of vapour in the equatorial atmosphere that keeps up a genial warmth throughout the night by preventing the radiation into space of the heat absorbed by the ...
... variations of temperature in the temperate zone . It is this large quantity of vapour in the equatorial atmosphere that keeps up a genial warmth throughout the night by preventing the radiation into space of the heat absorbed by the ...
Page 78
... variation , of protective modifications , and of mimicry , have been fully discussed elsewhere . For the study of the laws of variation in all its forms , these beautiful creatures are unsurpassed by any class of animals ; both on ...
... variation , of protective modifications , and of mimicry , have been fully discussed elsewhere . For the study of the laws of variation in all its forms , these beautiful creatures are unsurpassed by any class of animals ; both on ...
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Common terms and phrases
abundant adapted adorned Africa allied Amazon animals ants attract bamboo Batavia beautiful become beetles birds blue Borneo brilliant butterflies carnivora causes change of colour character characteristic climate Colours of Animals conspicuous continent curious Danaidæ Darwin distinct elegant equatorial zone existence extensive fact families favourable feet female ferns fertilization flowers foliage forest-trees fruits genera genus greater green groups habits heat humming-birds hyænas immense inhabit insects Juan Fernandez kinds land larger larvæ leaves lemurs less light Madagascar Malay Archipelago male mammalia Miocene monkeys natural selection naturalists nests North observed occur organic ornaments Palearctic palms parrots peculiar perhaps phenomena plants plumage probably produced proportion protection rays region remarkable resemble sexual selection showy slender sometimes South America species spots structure sun-birds surface tail temperate zones temperature theory tints tion toucans trees trunks uneatable variation varied variety various vegetation whole wings yellow