The Physical Basis of SocietyD. Appleton, 1916 - 406 من الصفحات |
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الصفحة 14
... seeds planted in May Kind of Light Sept. 6 Oct. 22 Red Green White Blue Height of plants 0.22 m . 0.09 m . 0.04 m . 0.03 m . 0.42 m . 0.15 m . 0.10 m . 0.03 m . So necessary is the sunlight that few plants will survive if the tops are ...
... seeds planted in May Kind of Light Sept. 6 Oct. 22 Red Green White Blue Height of plants 0.22 m . 0.09 m . 0.04 m . 0.03 m . 0.42 m . 0.15 m . 0.10 m . 0.03 m . So necessary is the sunlight that few plants will survive if the tops are ...
الصفحة 22
... seeds , bulbs and roots which would otherwise perish from the cold . This protection is likewise ex- tended to animals , even to man himself . Snow houses are not undervalued by the Eskimo . Snow , on the other hand , may cover the ...
... seeds , bulbs and roots which would otherwise perish from the cold . This protection is likewise ex- tended to animals , even to man himself . Snow houses are not undervalued by the Eskimo . Snow , on the other hand , may cover the ...
الصفحة 24
... seed . It was noted , long before the cause of the disease was discovered , that yellow fever stopped with the oncoming of frosts in the fall . The whale breathes air , yet cannot live out of water . This 13 MERRIAM , C. H. 14 MERRIAM ...
... seed . It was noted , long before the cause of the disease was discovered , that yellow fever stopped with the oncoming of frosts in the fall . The whale breathes air , yet cannot live out of water . This 13 MERRIAM , C. H. 14 MERRIAM ...
الصفحة 46
... seeds which lie on the ground and germinate the next year , she saves her plants . For the animals there are eggs to hatch the next year , larvæ to penetrate the earth , cocoons from which the new form comes , hibernation for bears ...
... seeds which lie on the ground and germinate the next year , she saves her plants . For the animals there are eggs to hatch the next year , larvæ to penetrate the earth , cocoons from which the new form comes , hibernation for bears ...
الصفحة 60
... seeds , but the same number of protected heads produced not a single seed . Humble bees alone visit red clover , as other bees cannot reach the nectar . We know that the red clover imported to New Zealand did not bear fertile seeds till ...
... seeds , but the same number of protected heads produced not a single seed . Humble bees alone visit red clover , as other bees cannot reach the nectar . We know that the red clover imported to New Zealand did not bear fertile seeds till ...
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