TENURE AND USE OF ARID GEAZING LANDS. 69 



2. Railroad Land Grants. 



6. Report on the Lumber Industry, Pt. I, p. 222, Dept. Commerce and Labor, 1913. 



7. Tallman, Clay. Statement Showing Land Grants Made by Congress, etc. U. S. 



Dept. Interior, 1915. 



3. Land Classification. 



8. Baker, O. E., and Strong, H. M. Arable Land in the United States. Year- 



book U. S. Dept. Agri., Sep. 771, 1918. 



9. Smith, Geo. Otis, and Others. The Classification of the Public Lands. U. S. 



Geol. Survey Bulletin 537, 1918. 



10. Zon, Rafael. The future Use of the Land of the United States. For. Serv. 



Circ. 159, 1909. 



4. Effects of Land Laws. 



11. Adams, Romanzo. Public Range Lands — A New Policy Needed. Am. Journ. 



Sociol., Vol. 22, No. 3, Nov., 1916. 



12. Report of Public Lands Commission. Senate Doc. 189, 8th Cong., 3d Sess., 1905. 



5. Climatic Data. 



Many bulletins and articles have been issued by the U. S. Weather Bureau and 

 various State experiment stations, summarizing records and giving maps and graphs. 



13. Atlas of American Agriculture. Part II. Climate. U. S. Dept. Agri., 1918. 



14. Huntington, Ellsworth. The Climatic Factor as Illustrated in Arid America. 



Carnegie Inst. Pub. 192, 1905. 



15. Sampson, Arthur W. Climate and Plant Growth in Certain Vegetative Asso- 



ciations. Dept. Agric. Bull. 700, 1918. 



6. Plant Distribution. 



16. Bailey, Vernon. Biological Survey of Texas. North American Fauna 25, 1905. 20 



17. . Life Zones and Crop Zones of New Mexico. North American Fauna 35,1913. 



18. Bray, Wm. L. Distribution and Adaptation of the Vegetation of Texas. Univ. 



of Texas Bull. 82, 1906. 



19. Carey, Merritt. A Biological Survey of Colorado. North American Fauna 



33, 1911. 



20. -. Life Zone Investigations in Wyoming. North American Fauna 42, 1917. 



21. Clements, F. E. Plant Succession. Carnegie Inst. Pub. 242, 1916. 



22. . Plant Indicators. Carnegie Inst. Pub. 290, 1920. 



(These two publications contain extended bibliographies.) 



23. Harshberger, John W. Phytogeographic Survey of North America. 1911. 



Maps, bibliographies, etc. 



24. Merriam, C. Hart. Life Zones and Crop Zones of the United States. Div. Biol. 



Survey Bull. 10, 1898. 



25. Robbins, W. W. Native Vegetation and Climate of Colorado in Their Relation 



to Agriculture. Colo. Exp. Bull. 224, 1917. 



26. Schantz, H. L., and Zon, Rafael. Plant Formations of the United States. 



Unpub. map. 



27. Schantz, H. L. Natural Vegetation as an Indicator of the Capabilities of the 



Land for Crop Production in the Great Plains Area. Bur. Plant Industry Bull. 

 201, 1906. 



28. Shreve, Forrest. A Map of the Vegetation of the U. S. Geog. Review, Vol. 



Ill, Feb., 1917. 



*o Issued by the Bureau of Biological Survey, U. S. Department of Agriculture. 



