The Physical Basis of SocietyD. Appleton, 1916 - 406 من الصفحات |
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الصفحة ix
... of importation and transportation of plants and animals and of killing of migratory birds . The neces- sity of an intelligent attitude towards other forms of life . CHAPTER III . THE CONTROL OF NATURE • Man's position ix.
... of importation and transportation of plants and animals and of killing of migratory birds . The neces- sity of an intelligent attitude towards other forms of life . CHAPTER III . THE CONTROL OF NATURE • Man's position ix.
الصفحة 26
... light for any length of time . The germs of syphilis and 15 SHELFORD , V. E. Animal Communities in Temperate America , p . 82 . tuberculosis are soon killed by sunlight . If a cockroach 26 THE PHYSICAL BASIS OF SOCIETY.
... light for any length of time . The germs of syphilis and 15 SHELFORD , V. E. Animal Communities in Temperate America , p . 82 . tuberculosis are soon killed by sunlight . If a cockroach 26 THE PHYSICAL BASIS OF SOCIETY.
الصفحة 27
Carl Kelsey. tuberculosis are soon killed by sunlight . If a cockroach is set free it will seek the shadow , while the fly goes to the light . In ponds the snails seek a faint light , being found in the lightest spots on the darkest days ...
Carl Kelsey. tuberculosis are soon killed by sunlight . If a cockroach is set free it will seek the shadow , while the fly goes to the light . In ponds the snails seek a faint light , being found in the lightest spots on the darkest days ...
الصفحة 46
... killing his insect pests . Winter in the colder regions destroys countless myriads of organisms . Some scheme of sus- pended animation as it were must be evolved if any are to survive . Nature is fertile in inventions . By means of ...
... killing his insect pests . Winter in the colder regions destroys countless myriads of organisms . Some scheme of sus- pended animation as it were must be evolved if any are to survive . Nature is fertile in inventions . By means of ...
الصفحة 47
... kill them . They must be fat when they begin the long sleep and must waken gradually . It is thought that if their temperature falls too low they awaken automatically , and by movement and the inhalation of oxygen again raise their ...
... kill them . They must be fat when they begin the long sleep and must waken gradually . It is thought that if their temperature falls too low they awaken automatically , and by movement and the inhalation of oxygen again raise their ...
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