The Physical Basis of SocietyD.Appleton, 1928 - 526 من الصفحات |
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الصفحة x
... Tropics World Population · Influences of Nature upon Man 65 68 Physical Effects Influences on Occupations and Activities Influences on Migration and Commerce Psychical Influences Civilization and Climate 69 71 74 75 78 IV . MUTUAL AID ...
... Tropics World Population · Influences of Nature upon Man 65 68 Physical Effects Influences on Occupations and Activities Influences on Migration and Commerce Psychical Influences Civilization and Climate 69 71 74 75 78 IV . MUTUAL AID ...
الصفحة 50
... tropics is limited by the cold of the north , while the southward extension of colder types is limited by the heat . Merriam has called this the " Law of Temperature Control " and thus states it : " Temperature by controlling ...
... tropics is limited by the cold of the north , while the southward extension of colder types is limited by the heat . Merriam has called this the " Law of Temperature Control " and thus states it : " Temperature by controlling ...
الصفحة 51
... tropics where growth is possible throughout the year with the frigid regions with their short summers and short growing seasons . Com- pare the dense tropical forests with their long vines with the little dwarf willows and aspens of the ...
... tropics where growth is possible throughout the year with the frigid regions with their short summers and short growing seasons . Com- pare the dense tropical forests with their long vines with the little dwarf willows and aspens of the ...
الصفحة 52
... tropics nor our alligator skins from Canada . For reasons not wholly understood the gaudily colored birds like the toucans of the tropics are con- trasted with the gray and white grouse and geese of cold lands . Plants must produce ...
... tropics nor our alligator skins from Canada . For reasons not wholly understood the gaudily colored birds like the toucans of the tropics are con- trasted with the gray and white grouse and geese of cold lands . Plants must produce ...
الصفحة 63
... tropics and the polar regions . No race has enough to be of great protection against the cold . In general the Europeans have heavy beards as compared with the Negroes , and this might be cited as an indication of climatic adaptation ...
... tropics and the polar regions . No race has enough to be of great protection against the cold . In general the Europeans have heavy beards as compared with the Negroes , and this might be cited as an indication of climatic adaptation ...
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طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
acres Africa alloy America appears areas Asia atoms average bacteria birds black bass body carbon carbon dioxide cattle cause cells Cenozoic cent century changes chemical chlorophyll climate coal common compounds crops cultivated culture death rate destroy disease distribution domestic animals early earth eaten eggs elements enemies Europe evidence fact fish forms germ germ cells hawk heat horse human hydrogen Ibid important increase Indian insects iron killed known land later light live man's metals mice migration miles moth native nature neolithic nitrogen ocean organisms oxygen Pará rubber tree parasites plants and animals population pounds produce protoplasm R. S. LULL race regions rodents season seeds seems sharp-shinned hawk sheep soil South South America species square mile substances sugar supply surface survive tarpan temperature thousand tion to-day trees tropics types United wild