The Physical Basis of SocietyD. Appleton, 1916 - 406 من الصفحات |
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الصفحة 34
... tropics is the greatest and that the proportion of rays per unit of surface diminishes as we go north in propor- tion to a function of the latitude . In addition to this the further from the tropics we go the greater is the layer of air ...
... tropics is the greatest and that the proportion of rays per unit of surface diminishes as we go north in propor- tion to a function of the latitude . In addition to this the further from the tropics we go the greater is the layer of air ...
الصفحة 41
... tropics has been men- tioned . That change of residence from the temperate zones to the tropics may have pronounced effects is un- doubted . " Practically every northerner who goes to the Torrid Zone says at first that he works as well ...
... tropics has been men- tioned . That change of residence from the temperate zones to the tropics may have pronounced effects is un- doubted . " Practically every northerner who goes to the Torrid Zone says at first that he works as well ...
الصفحة 142
... tropics , the hookworm disease which came to America with the slaves from Africa are better under- stood and are being conquered . The movement inaugu- rated by the chemist Pasteur has revolutionized the func- tion of medicine and the ...
... tropics , the hookworm disease which came to America with the slaves from Africa are better under- stood and are being conquered . The movement inaugu- rated by the chemist Pasteur has revolutionized the func- tion of medicine and the ...
الصفحة 148
... , J. E. The Book of Useful Plants . 1913 . WILLIAMS , H. S. Miracles of Science . 1914 . WILLIS , J. C. Agriculture in the Tropics ( 2nd Ed . ) . 1914 . CHAPTER IV THE EVOLUTION OF MAN The real test of 148 THE PHYSICAL BASIS OF SOCIETY.
... , J. E. The Book of Useful Plants . 1913 . WILLIAMS , H. S. Miracles of Science . 1914 . WILLIS , J. C. Agriculture in the Tropics ( 2nd Ed . ) . 1914 . CHAPTER IV THE EVOLUTION OF MAN The real test of 148 THE PHYSICAL BASIS OF SOCIETY.
الصفحة 291
... tropics better than the White and may continue to show a higher death rate in the temperate regions . We have now hastily reviewed most of the race dif- ferences which have attracted the attention of students . In spite of popular ...
... tropics better than the White and may continue to show a higher death rate in the temperate regions . We have now hastily reviewed most of the race dif- ferences which have attracted the attention of students . In spite of popular ...
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