Tropical Nature, and Other EssaysMacmillan and Company, 1878 - 356 pages |
From inside the book
Results 1-5 of 19
Page 21
... marked when we compare our midsummer twilight with that of the tropics . Even with us the duration of twilight is very much shorter at the time of the equinoxes , and it is probably not much more than a third shorter than this at the ...
... marked when we compare our midsummer twilight with that of the tropics . Even with us the duration of twilight is very much shorter at the time of the equinoxes , and it is probably not much more than a third shorter than this at the ...
Page 59
... marked out by the different colour of the closed leaflets . The explanation of this pheno- menon , given by botanists , is not very satisfactory ; ' while the purpose or use of the peculiarity is still more mysterious , seeing that out ...
... marked out by the different colour of the closed leaflets . The explanation of this pheno- menon , given by botanists , is not very satisfactory ; ' while the purpose or use of the peculiarity is still more mysterious , seeing that out ...
Page 167
... marked effect of colour amid the vast masses of foliage which surround them . An experienced collector in the Eastern tropics once told me , that although a single mountain in Java had produced three hundred species of Orchide¿ , only ...
... marked effect of colour amid the vast masses of foliage which surround them . An experienced collector in the Eastern tropics once told me , that although a single mountain in Java had produced three hundred species of Orchide¿ , only ...
Page 169
... marked were brighter than usual . Many other cases are known among insects in which the same species acquires a different tint according to its surroundings ; this being particularly marked in some South African locusts , which ...
... marked were brighter than usual . Many other cases are known among insects in which the same species acquires a different tint according to its surroundings ; this being particularly marked in some South African locusts , which ...
Page 197
... marked differences of colour are not required , owing to their higher organization and more perfect senses , which render recognition easy by means of a combination of very slight differential characters . This principle may perhaps ...
... marked differences of colour are not required , owing to their higher organization and more perfect senses , which render recognition easy by means of a combination of very slight differential characters . This principle may perhaps ...
Other editions - View all
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 Danaid¿ 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 hy¿nas immense inhabit insects Juan Fernandez kinds land larger larv¿ 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