 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
 | United States. Weather Bureau - 1899 - 926 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. Vegetation throughout the greater part of the United States lies within the temperate (or austral)... | |
 | 1899 - 848 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. Vegetation throughout the greater part of the United States lies within the temperate (or austral)... | |
 | 1899 - 562 էջ
...temperatures for the entire period of growth and reproduction. In southward distribution they are restricted by the mean temperature of a brief period during the hottest part of the year. It yet remained to determine what temperature is effective for life, above which temperatures... | |
 | Davenport Academy of Natural Sciences - 1899 - 398 էջ
...temperatures for the entire season of growth and reproduction. "In southward distribution they are restricted by the mean temperature of a brief period during the hottest part of the year." These principles cover the fundamental facts. Some species have adapted themselves to a wider... | |
 | United States. Office of Experiment Stations - 1899 - 1306 էջ
...sum of the positive temperatures for the entire season of growth and reproduction, and the southern distribution is governed by the mean temperature of a brief period during tbe hottest part of the year." The sum of the positive temperatures is secured by adding together for... | |
 | Geological Survey of New Jersey - 1900 - 414 էջ
...Distribution of Terrestrial Animals and Plants," National Geographic Magazine, Vol. VI, December, 1894), the northward distribution of terrestrial animals and...temperature of a brief period during the hottest part of the year. According to Prof. Merriam the species of the Carolinian belt require a total quantity of heat... | |
 | United States. Office of Experiment Stations - 1900 - 1320 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." The author states that the mean temperatures, even in January and February, are high enough... | |
 | Davenport Academy of Natural Sciences - 1900 - 542 էջ
...temperatures for the entire season of growth and reproduction. "In southward distribution they are restricted by the mean temperature of a brief period during the hottest part of the year." These principles cover the fundamental facts. Some species have adapted themselves to a wider... | |
 | Willard Nelson Clute - 1901 - 324 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." Vegetation throughout the greater part of the United States lies within the temperate (or austral)... | |
 | Florence Merriam Bailey - 1902 - 698 էջ
...and plants depends on temperature has been demonstrated by Dr. Merriam as a physical law that "the northward distribution of terrestrial animals and...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... | |
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