The Physical Basis of SocietyD. Appleton, 1916 - 406 من الصفحات |
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الصفحة 79
... numbers on the Humboldt River in Nevada in 1907 and by November there were from 8,000 to 12,000 per acre , their ... numbers rapidly decreased . It is sus- pected that some disease was responsible to a large ex- tent for the sudden ...
... numbers on the Humboldt River in Nevada in 1907 and by November there were from 8,000 to 12,000 per acre , their ... numbers rapidly decreased . It is sus- pected that some disease was responsible to a large ex- tent for the sudden ...
الصفحة 88
Carl Kelsey. cluding birds , because their number and ability to con- sume remains practically a fixed quantity due to their slow rate of multiplication . It sounds large when we find 100 larvae of an elm - leaf beetle in a bird stomach ...
Carl Kelsey. cluding birds , because their number and ability to con- sume remains practically a fixed quantity due to their slow rate of multiplication . It sounds large when we find 100 larvae of an elm - leaf beetle in a bird stomach ...
الصفحة 120
... large numbers , but now relatively few are esteemed worth the trouble . One re- cent addition to the list of which Americans boast is the turkey . The ostrich was not kept until the middle of the nineteenth century . Of four - legged ...
... large numbers , but now relatively few are esteemed worth the trouble . One re- cent addition to the list of which Americans boast is the turkey . The ostrich was not kept until the middle of the nineteenth century . Of four - legged ...
الصفحة 127
... vital powers . Death is the result of accident or assault by some foe in 6 FRASER , W. J. Three Herds Dairy Cattle , Rev. of Rev. , March , 1915 . numbers large or small . Now that the large animals THE CONTROL OF NATURE 127.
... vital powers . Death is the result of accident or assault by some foe in 6 FRASER , W. J. Three Herds Dairy Cattle , Rev. of Rev. , March , 1915 . numbers large or small . Now that the large animals THE CONTROL OF NATURE 127.
الصفحة 128
Carl Kelsey. numbers large or small . Now that the large animals are overcome man is tempted to boast of his conquest , forget- ting that today his dangerous enemies are the minute forms of life . The discovery of the causes of zymotic ...
Carl Kelsey. numbers large or small . Now that the large animals are overcome man is tempted to boast of his conquest , forget- ting that today his dangerous enemies are the minute forms of life . The discovery of the causes of zymotic ...
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