The Physical Basis of SocietyD.Appleton, 1928 - 526 من الصفحات |
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الصفحة 37
... carbon dioxide to every one hundred volumes of air . ... He observed that if the proportion of CO2 becomes higher then the breathing is quickened , thus washing out more CO2 from the respiratory chambers and replacing it with air . If ...
... carbon dioxide to every one hundred volumes of air . ... He observed that if the proportion of CO2 becomes higher then the breathing is quickened , thus washing out more CO2 from the respiratory chambers and replacing it with air . If ...
الصفحة 56
... carbon dioxide . Plants , on the con- trary , flourish if the carbon is present . In an aquarium there is often an excess of nitrogen which is harmful to the fish . The whales and porpoises being air - breathing animals must come to the ...
... carbon dioxide . Plants , on the con- trary , flourish if the carbon is present . In an aquarium there is often an excess of nitrogen which is harmful to the fish . The whales and porpoises being air - breathing animals must come to the ...
الصفحة 58
... carbon dioxide will not kill them . They must be fat when they begin the long sleep and must waken gradually . It is believed that if their temperature falls too low they awaken automatically , and by movement and the inhalation of ...
... carbon dioxide will not kill them . They must be fat when they begin the long sleep and must waken gradually . It is believed that if their temperature falls too low they awaken automatically , and by movement and the inhalation of ...
الصفحة 77
... carbon dioxide ; slower circulation of the blood . Dry air and decreased pressure , on the other hand , have these effects : -nervous excitement ; sleeplessness ; quickened pulse ; a dim skin and a decreased temperature . " 10 Many ...
... carbon dioxide ; slower circulation of the blood . Dry air and decreased pressure , on the other hand , have these effects : -nervous excitement ; sleeplessness ; quickened pulse ; a dim skin and a decreased temperature . " 10 Many ...
الصفحة 89
... carbon dioxide and organic acids which can dissolve these substances and thus make them THE STRUGGLE FOR EXISTENCE 89 Organic Processes Bacterial Chemistry.
... carbon dioxide and organic acids which can dissolve these substances and thus make them THE STRUGGLE FOR EXISTENCE 89 Organic Processes Bacterial Chemistry.
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acres Africa America appears areas Asia atoms average bacteria believe birds body carbon carbon dioxide cause cent century cephalic index changes characters chromosomes civilization climate color common copper crops cultivated culture danger Darwin death rate destroy disease domestic early earth eggs environment Europe European evidence fact feeble-minded females fish forms germ cells given heredity human Ibid important increase Indians individual inheritance insane insects iron killed known land later light living male man's marriage metals miles natural selection nature Negro neolithic organisms ovum oxygen Pará rubber tree parasites physical population possible pounds present problems produced R. S. LULL race seeds seems social South South America species square mile supply T. H. MORGAN temperature things thousand tion to-day trees tropics types United wild woman women