366 BIBLIOGRAPHY. 



Clements, F. E. 1907. Plant physiology and ecology. 

 1907 2 . Causes of alpine dwarfing. Sci., 1907. 



1908. An ecologic view of the species conception. Am. Nat. 42: 253. 



1909. Plant formations and forest types. Proc. Soc. Am. For. 4: 50. 



1910. The life history of lodgepole burn forests. For. Serv. Bull. 79. 

 1910 2 . A classification and use survey of Minnesota resources. Minn. Conserv. Agr. 



Congress 1910. 

 1912. Some reflections and impressions. New Phyt. 11: 177. 



1916. Plant succession. Carnegie Inst. Wash. Pub. 242. 



1917. Ecology. Carnegie Inst, Wash. Year Book 16: 303. 



1918. Scope and signiflcance of paleo-ecology. Bull. Geol. Soc. Am. 29: 369. 

 1918 2 . Ecology. Carnegie Inst. Wash. Year Book 17: 287. 



1919. Ecology. Carnegie Inst. Wash. Year Book 18. 



and E. S. Clements. 1902. Herbaria Formationum Coloradensium. 



, . 1906. Cryptogamae Formationum Coloradensium. 



, . 1913. Rocky Mountain flowers. 



, . 1915. Herbaria Ecadium Calif orniae. 



Cockerell, T. D. A. 1897. Life zones in New Mexico. N. M. Agr. Expt. Sta. Bull. 24. 



. 1906. The alpine flora of Colorado. Am. Nat. 40: 861. 



Contejean, C. H. 1881. Geographie botanique. 



Cook, O. F. 1908. Change of vegetation on the south Texas prairies. Bur. Plant Ind. Cir. 14. 



Cooper, W. S. 1912. The ecological succession of mosses, as illustrated upon Isle Royale, Lake 



Superior. Plant World 15: 197. 

 . 1916. Plant successions in the Mount Robson region, British Columbia. Plant World 



19:211. 



. 1917. Redwoods, rainfall and fog. Plant World 20: 179. 



, 1919. An ecological study of the chaparral and related communities. Ms. 



Cotton, J. S. 1905. Range management in the State of Washington. Bur. Plant Ind. Bull. 75. 



. 1908. The improvement of mountain meadows. Bur. Plant Ind. Bull. 127. 



Coville, F. V. 1893. Botany of the Death Valley expedition. Contr. U. S. Nat. Herb. 4. 



. 1898. Our public grazing lands. Forum 26: 108. 



. 1911. Experiments in blueberry culture. Bur. Plant Ind. Bull. 193. 



. 1913. The agricultural utilization of acid lands by means of acid tolerant crops. Bull. 



Dept. Agr. 6. 



. 1915. Directions for blueberry culture. Bur. Plant Ind. Bull. 334. 



Cowan, J. 1916. Farming practice in the sand hills section of Nebraska. Nebr. Agr. Expt. Sta. 



Bull. 156. 

 Cowles, H. C. 1899. The ecological relations of the vegetation of the sand dunes of Lake Michi- 

 gan. Bot. Gaz. 27: 95. 

 Crandall, C. S. 1890. Some Colorado grasses: Appendix. Colo. Agr. Expt. Sta. Bull. 12. 

 Crump, W. B. 1913. The coefficient of humidity: A new method of expressing the soil moisture. 



New Phyt. 12:125. 

 Cunningham, C. C, and R. Kennet. 1918. Growing sorghum in Kansas. Kan. Agr. Expt. 



Sta. Bull. 218. 

 Dana, S. T. 1913. A standard basis for classification. Proc. Soc. Am. For. 8: 53. 

 Darlington, H. T. 1915. A study of grazing conditions in the Wenaha National Forest. Wash. 



Agr. Expt. Sta. Bull. 122. 

 Davy, J. B. 1902. Stock ranges of northwestern California: Notes on the grasses and forage 



plants and range conditions. Bur. Plant Ind. Bull. 12. 

 . 1902. The native vegetation and crops of the Colorado delta in the Salton Basin. Supp. 



Cal. Expt. Sta. Bull. 140. 

 De Candolle, A. 1874. Constitution dans le regne vegetale de groupes physiologique appli- 



cables a la geographie ancienne et moderne. Arch. Sci. Phys. Nat. 

 Degner, H. J. 1729. Dissertatio physica de turfis. 

 Donaldson, N. C. 1916. Cereal experiments at the Judith Basin substation, Moccasin, Mont. 



U. S. Dept. Agr. Bull. 398. 



. 1916. Grains for the Montana dry lands. U. S. Dept. Agr. Farmers' Bull. 749. 



Dosdall, Louise. 1919. Water requirement and adaptation in Equisetum. Plant World 22:1 

 Douglass, A. E. 1909. Weather cycles in the growth of big trees. Mon. Weath. Rev. 1909. 

 . 1914. A method of estimating rainfall by the growth of trees. Bull. Am. Geog. Soc. 



46:321. 

 . 1914 2 . A method of estimating rainfall by the growth of trees. In Huntington's 



"The Climatic Factor," Carnegie Inst. Wash. Pub. 192:101. 



. 1919. Climatic Cycles and Tree Growth. Carnegie Inst. Wash. Pub. 289. 



Douglas, A. W. 1919. Relation of weather and business in regard to rainfall. Special Bull. 



Chamber Commerce U. S. A. 1919. 

 Drake, J. A., and J. C. Rundles. 1919. Sweet clover on corn belt farms. U. S. Dept. Agr. 



Farmers' Bull. 1005. 



