Tropical nature, and other essaysMacmillan, 1878 - 356 pages |
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Page 7
... rays independently of altitude . In England the noonday sun in the month of June rarely incon- veniences us or produces any burning of the skin ; while in the tropics , at almost any hour of the day , and when the sun has an elevation ...
... rays independently of altitude . In England the noonday sun in the month of June rarely incon- veniences us or produces any burning of the skin ; while in the tropics , at almost any hour of the day , and when the sun has an elevation ...
Page 9
... rays of the sun pass through it unobstructed to the earth ; but the warmth given off by the heated earth is very largely absorbed by it , thus raising the temperature of the air ; and as it is the lower strata of air which contain most ...
... rays of the sun pass through it unobstructed to the earth ; but the warmth given off by the heated earth is very largely absorbed by it , thus raising the temperature of the air ; and as it is the lower strata of air which contain most ...
Page 11
... rays falling upon two given portions of the earth's surface are exactly equal , yet the sensible and effective heat produced in the two localities may be very different according as the atmosphere contains much or little vapour . In the ...
... rays falling upon two given portions of the earth's surface are exactly equal , yet the sensible and effective heat produced in the two localities may be very different according as the atmosphere contains much or little vapour . In the ...
Page 16
... rays of the sun . Again , the most copious condensation both of dew and rain is greatly influenced by vegetation and especially by forests , and also by the presence of hills and moun- tains , and is therefore greater on land than on ...
... rays of the sun . Again , the most copious condensation both of dew and rain is greatly influenced by vegetation and especially by forests , and also by the presence of hills and moun- tains , and is therefore greater on land than on ...
Page 20
... rays , and the rains are seldom violent enough to strip this protective covering from the surface . In tropical and even even in south - temperate countries , on the other hand , the rains are periodical and often of excessive violence ...
... rays , and the rains are seldom violent enough to strip this protective covering from the surface . In tropical and even even in south - temperate countries , on the other hand , the rains are periodical and often of excessive violence ...
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abundant adapted adorned Africa allied Amazon animals ants Asia attract bamboo Batavia beautiful become birds blue brilliant butterflies carnivora causes changes character characteristic climate colour Colours of Animals comparatively conspicuous continent curious Danaidæ Darwin distinct Eocene equator equatorial zone existence extensive fact families fauna favourable feet female ferns fertilization flowers foliage forests fruits genera genus greater green groups habits heat humming-birds hyænas immense inhabit insects Juan Fernandez land larger larvæ leaves lemurs less light Madagascar Malay Archipelago male mammalia marsupials Miocene monkeys natural selection naturalists North northern observed occur ocean ornaments Palearctic 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 trees tropical trunks Ungulata variation varied variety vegetation whole wings yellow