The Physical Basis of SocietyD. Appleton, 1916 - 406 من الصفحات |
من داخل الكتاب
النتائج 1-5 من 35
الصفحة 15
... trees with protected buds , accustomed to endure both heat and cold , or spiny- leaved evergreens . Other things being equal , the nearer the pole the scantier and more dwarfed the vegetation . Periods of growth are followed by months ...
... trees with protected buds , accustomed to endure both heat and cold , or spiny- leaved evergreens . Other things being equal , the nearer the pole the scantier and more dwarfed the vegetation . Periods of growth are followed by months ...
الصفحة 44
... trees of California which varied in age from 230 to 3200 years . Eighty were over 2000 years old . Judging from the width of the rings the sequoia grew on the average of 30 per cent faster at the time of Christ than it did A.D. 1500.33 ...
... trees of California which varied in age from 230 to 3200 years . Eighty were over 2000 years old . Judging from the width of the rings the sequoia grew on the average of 30 per cent faster at the time of Christ than it did A.D. 1500.33 ...
الصفحة 46
... tree literally teems with dormant life . " The animal lives in an environment which is con- stantly changing . Its spontaneous movements are con- stantly bringing it into different conditions . It tends to regulate its internal ...
... tree literally teems with dormant life . " The animal lives in an environment which is con- stantly changing . Its spontaneous movements are con- stantly bringing it into different conditions . It tends to regulate its internal ...
الصفحة 47
... trees or crevices in the rock , but they accept chimneys as satisfactory substitutes . The black - throated hunting and other ground - building birds will , if their nests are destroyed , frequently build late in the season in trees ...
... trees or crevices in the rock , but they accept chimneys as satisfactory substitutes . The black - throated hunting and other ground - building birds will , if their nests are destroyed , frequently build late in the season in trees ...
الصفحة 51
... Elm at Cam- bridge , Massachusetts , was studied by Professor Pierce of Harvard . He reported that the tree bore some 7,000 , - 000 leaves having a surface area of 200,000 square feet or about five acres . It being estimated that one 51.
... Elm at Cam- bridge , Massachusetts , was studied by Professor Pierce of Harvard . He reported that the tree bore some 7,000 , - 000 leaves having a surface area of 200,000 square feet or about five acres . It being estimated that one 51.
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
acre Africa America appeared Asia Australoid average bacteria basis become believe birds body brain breeding carbon carbon dioxid carbonic acid cause cent century cephalic index changes characters child chromosomes civilization climate color considered Darwin death destroyed disease early earth eggs elements environment Europe European evidence evolution existence fact families favorable feeble-minded female forms genius germ cells groups growth hair hemophilia hence heredity human Ibid Inasmuch inches increase individuals influence inheritance insane insects institutions Kallikak Family known Lamarck large numbers larvæ less living male man's mated ment mental nature Negro normal organisms ovum oxygen parents physical plants and animals population possible problems produced race relatively seems smallpox social society soil species spermatozoon square mile survive temperature thought tion tropics tuberculosis United woman women yellow yellow fever