 Investigations conducted by the Biological Survey have shown that the northward distribution of terrestrial animals and plants is governed by the sum of the positive temperatures for the entire season of growth and reproduction, and that the southward...  Bulletin - Էջ 441898Ամբողջությամբ դիտվող - Այս գրքի մասին
 | Florence Merriam Bailey - 1902 - 698 էջ
...the positive temperatures for the entire season of growth and reproduction, and that the south ward, distribution is governed by the mean temperature of a brief period during the hottest part of the year."1 With this as the working basis he has divided the United States into three parts, having the... | |
 | Israel Cook Russell - 1904 - 488 էջ
...well-determined law that the northward distribution of terrestrial animals and plants is controlled by the sum of the positive temperatures for the entire...the mean temperature of a brief period during the hotter portion of the year. By " positive temperatures " is meant the sum of the mean daily temperature... | |
 | New York (State) Dept. of Agriculture - 1906 - 508 էջ
...governed by the sum of the positive temperatures for the entire season of growth and reproduction, and the southward distribution is governed by the mean...temperature of a brief period during the hottest part of the year." In fruitgrowing it is found that the distribution of fruits and their varieties conforms to... | |
 | Rudolph Martin Anderson - 1907 - 312 էջ
...animals and plants is governed by the sum of the positive temperatures for the entire season of gro~a'th and reproduction, and that the southward distribution...temperature of a brief period during the hottest part of the year. Transition zone species . . . can not endure a summer temperature the mean of which for the six... | |
 | New York State Agricultural Experiment Station - 1907 - 558 էջ
...governed by the sum of the positive temperatures for the entire season of growth and reproduction, and the southward distribution is governed by the mean...temperature of a brief period during the hottest part of the year." In fruit-growing it is found that the distribution of fruits and their varieties conforms to... | |
 | New York (State) Dept. of Agriculture - 1907 - 556 էջ
...governed by the sum of the positive temperatures for the entire season of growth and reproduction, and the southward distribution is governed by the mean...temperature of a brief period during the hottest part of the year." In fruit-growing it is found that the distribution of fruits and their varieties conforms to... | |
 | 1908 - 514 էջ
...ie, over 43° F. — EDS) temperatures for the entire season of growth and reproduction, and that flu southward distribution is governed by the, mean temperature of a brief period during the hottest part of the year." Isotherms plotted by Doctor Merriam on this basis were found "to conform in the most gratifying... | |
 | Davenport (Iowa) Public Museum - 1910 - 898 էջ
...swallow-tail and Mississippi kites. "Investigations conducted by the Biological Survey have shown that the northward distribution of terrestrial animals and...temperature of a brief period during the hottest part of the year. Transition zone species . . . can not endure a summer temperature the mean of which for the six... | |
 | Davenport Academy of Sciences - 1910 - 576 էջ
...animals and plants is governed by the sum of the positive temperatures for the entire season of grcn1'th and reproduction, and that the southward distribution...temperature of a brief period during the hottest part of the year. Transition zone species . . . can not endure a summer temperature the mean of which for the six... | |
 | Edward Royal Warren - 1910 - 362 էջ
...by the sum of the positive temperatures for the entire season of growth and reproduction, and the t the southward distribution is governed by the mean...temperature of a brief period during the hottest part of the year." He has divided the United States into Boreal (Northern), Austral (Southern), and Transition... | |
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