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12. Paxson, F. L.- — The Last American Frontier 



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13. Pyle, J. G. — The Life of James J. Hill (1917). 

 l-i. Schafer, Joseph. — The Pacific Northwest. 



15. Smalley, F. V.—The Future of the Great Arid 



West, in The Forum, Vol. XIX, pp. 467-475. 

 Our Sub-Arid Belt, in The Forum, Vol. XXI 

 (1896), pp. 486-493. 



16. Smythe, W. E. — The Conquest of Arid America 



(1905). 



17. Encyclopedia Britannica (Eleventh Edition). 



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18. Agricultural Progress of Fifty Years, lSoO-1900, 



in Twelfth Census of the United States 

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19. Agricidtiiral Resources of Wyoming Territory, in 



Annual Report of the United States Depart- 

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20. Agricidtural Topography and Resources of Mon- 



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21. From Cattle Range to Orange Grove, in Southern 



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22. Early Farming in Umatilla County, in Oregon 



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