The Physical Basis of SocietyD. Appleton, 1916 - 406 من الصفحات |
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الصفحة ix
... bacteria and plants . The fixing of nitrogen . The production of food . Complex series of interrelations in the animal world reaching from the lowest to highest forms . An- imal communities . Ecology . Mutual aid . The rapid possible ...
... bacteria and plants . The fixing of nitrogen . The production of food . Complex series of interrelations in the animal world reaching from the lowest to highest forms . An- imal communities . Ecology . Mutual aid . The rapid possible ...
الصفحة 7
... bacteria ' live and multiply in water at a temperature of 32 ° , others prosper at 170 ° . Plants have their stand- ard temperature which falls some 2 or 3o at night . The normal temperature of the human body is slightly above 98 ...
... bacteria ' live and multiply in water at a temperature of 32 ° , others prosper at 170 ° . Plants have their stand- ard temperature which falls some 2 or 3o at night . The normal temperature of the human body is slightly above 98 ...
الصفحة 20
... bacteria per cubic meter , whereas in Paris 4,790 were found . One of the great services performed by rain is the cleansing of the air by removing these impurities . The air of the desert and the ocean is very pure . The presence of ...
... bacteria per cubic meter , whereas in Paris 4,790 were found . One of the great services performed by rain is the cleansing of the air by removing these impurities . The air of the desert and the ocean is very pure . The presence of ...
الصفحة 50
... and Its Geographic Con- ditions . 1903 . Influence of Geographical Environment . 1911 . WOODRUFF , C. W. The Effect of Tropical Light on White Men . 1905 . 1 LIPMAN , J. G. Bacteria in Relation to Country 50 THE PHYSICAL BASIS OF SOCIETY.
... and Its Geographic Con- ditions . 1903 . Influence of Geographical Environment . 1911 . WOODRUFF , C. W. The Effect of Tropical Light on White Men . 1905 . 1 LIPMAN , J. G. Bacteria in Relation to Country 50 THE PHYSICAL BASIS OF SOCIETY.
الصفحة 52
... bacteria which collected in nodules on the roots and were able to draw the nitrogen directly from the air and make it available for plants . It is estimated that an acre of alfalfa adds nitrogen worth at least $ 25.00 per year to the ...
... bacteria which collected in nodules on the roots and were able to draw the nitrogen directly from the air and make it available for plants . It is estimated that an acre of alfalfa adds nitrogen worth at least $ 25.00 per year to the ...
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