Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Books Books 21 - 30 of 53 on Survey have shown that the northward distribution of terrestrial animals and plants....
" 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 distribution is governed by the mean temperature... "
Bulletin - Page 105
by United States. Weather Bureau - 1899
Full view - About this book

Annual Report, Volume 3

New York (State) Dept. of Agriculture - 1907
...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 this law...
Full view - About this book

Journal of Economic Entomology

Beneficial insects - 1908
...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 manner...
Full view - About this book

Proceedings of the Davenport Academy of Sciences

Natural history - 1910
...for the entire season of grcn1'th and reproduction, and that the southward distribution is governed by the mean 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 hottest...
Full view - About this book

The Mammals of Colorado: An Account of the Several Species Found Within the ...

Edward Royal Warren - Mammals - 1910 - 300 pages
...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 (Intermediate)...
Full view - About this book

Proceedings, Volumes 11-12

Davenport Academy of Sciences - Natural history - 1910
...temperatures for the entire season of growth and reproduction, and that the southward distribution is governed by the mean 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 hottest...
Full view - About this book

The Auk

Birds - 1911
...temperatures for the entire season of growth and reproduction, and that the southward distribution is governed by the mean temperature of a brief period during the hottest part of the year. The range of the Mockingbird appears to be accounted for under the first portion of this law, though...
Full view - About this book

Die Vegetation der Erde: Sammlung pflanzengeographischer Monographien, Volume 13

John William Harshberger - Phytogeography - 1911 - 790 pages
...temperature for the entire season of growth and reproduction, and that the southward distribution is governed by the mean temperature of a brief period during the hottest part of the year. Applying these principles, Merriam divides North America into three primary transcontinental regions...
Full view - About this book

The Americana: A Universal Reference Library, Comprising the Arts ..., Volume 7

Frederick Converse Beach, George Edwin Rines - Encyclopedias and dictionaries - 1911
...data previously collected by the division, that species are limited in their southward distribution by the mean temperature of a brief period during the hottest part of the summer. For experimental purposes the mean normal temperature of the hottest six consecutive weeks...
Full view - About this book

The Mammals of Illinois and Wisconsin

Charles Barney Cory - Mammals - 1912 - 505 pages
...temperatures of the entire season of growth and reproduction, and that the southward distribution is governed by the mean temperature of a brief period during the hottest part of the year." The North American continent is divided into three great primary regions: (1) The Boreal Region, comprising...
Full view - About this book

Class Book of Economic Entomology: With Special Reference to the Economic ...

William Lochhead - Beneficial insects - 1919 - 436 pages
...season of growth and reproduction; and 2. "Animals and plants . are restricted in southward distribution by the mean temperature of a brief period during the hottest part of the year." FIG. 44. — Map of North America showing the life zones. (After Mar tum.) As a rule, however, insects...
Full view - About this book




  1. My library
  2. Help
  3. Advanced Book Search
  4. Download PDF