FOREST BOTANY 195 



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the prairies. Iowa Univ. Lab. Nat. Hist. Bull. 6 (2) : 169^240. 1911. 



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the prairies again. Science 68 : 321-323. 1928. 



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experiments in timber raising in kansas. Gard. Monthly 19: 210-211. 



1877. 



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notes on the distribution of timber in south-western IOWA, with infer- 

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Vestal, A. G. (3859) 



an associational study of Illinois sand pkairie. 111. State. Lab. Nat Hist. 

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A BLACK SOIL PRAIRIE STATION IN NORTHEASTERN ILLINOIS. Bull. TOITey Bot. 



Club. 41 : 351-363. 1914. 

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INVASION OF FOREST LAND BY PRAIRIE ALONG RAILROADS. 111. State Acad. Sd. 



Trans. 2 : 126-128. 1918. 

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local inclusions of prairie within forest. 111. State Acad. Sci. Trans. 

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Waokerman, A. E. (3863) 



why prairies in Arkansas and Louisiana? Jour. Forestry 27: 726-734, 

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Weaver, J. E., Thiel, A. F., Pool, R. J., and Jean, F. C. (3864) 



ECOLOGICAL STUDIES IN THE TENSION ZONE BETWEEN PRAIRIE AND WOODLAND. 



Nebr. Univ., Bot. Survey Nebr. (n. s.) 1: 1-60; 2: 1-47, illus. 1917-18. 



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on the origin of the prairies, Amer. Jour. Sci. (1) 1: 331-337. 1818. 



White, C. A. (3866) 



ADAPTABILITY OF THE PRAIRIES FOR ARTIFICIAL FORESTRY. Science 3 '. 438-443. 



1884. 



Whitford, H. N. (3867) 



the forest and the prairie. In Elrod, M. J., Lectures at Flathead Lake, 

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Whitney, J. D. (3868) 



plain, prairie, and forest. Amer. Nat. 10: 577-588, 656-667. 1876. 



WiLLARD, D. E. (3869) 



THE STORY OF THE PRAIRIES, OR THE LANDSCAPE GEOLOGY OF NORTH DAKOTA. Ed. 



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ON THE ORIGIN OF PRAIRIES OF THE VALLEY OF THE MISSISSIPPI. Amer. Jour. 



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Woodward, John. (3871) 



origin of prairies in Illinois, Bot. Gaz. 77 (3) : 241-261. 1924. 



FOREST TYPES 



Ashe, W. W. (3872) 



FOREST TYPES OF THE APPALACHIAN AND WHITE MOUNTAINS. JOUr. Elisha 



Mitchell Sci. Soc. 37 (3-4) : 183-198. 1922. 



Baker, F. S. (3873) 



aspen as a temporary forest type. Jour. Forestry 16: 294-303, illus. 

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FOREST TYPES IN THE CENTRAL ROCKY MOUNTAINS AS AFFECTED BY CLIMATE AND 



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