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 the ...
... 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 the ...
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 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