Pasturage lands 28 A bill to authorize the organization of irrigation districts 30 A bill to authorize the organization of pasturage districts 33 Water rights 40 The lands should be classified 43 CHAPTER III. THE RAINFALL OF THE WESTERN PORTION OF THE UNITED STATES: Precipitation of the Sub-humid Region 47 Precipitation of the Arid Region 48 Precipitation of the San Francisco Region 49 Precipitation of the Region of the Lower Columbia 49 Distribution of rain through the year 50 Precipitation of Texas 50 Precipitation of Dakota 51 Seasonal precipitation in the Region of the Plains 52 Seasonal precipitation in the San Francisco Region 53 Mean temperature, by seasons, for the San Francisco Region 54 Seasonal precipitation and temperature on the Pacific Coast, etc. 55 Seasonal precipitation in Arizona and New Mexico 56 CHAPTER IV. WATER SUPPLY.--BY G. K. GILBERT: Increase of streams 57 Rise of Great Salt Lake 58 Volcanic theory 67 Climatic theory 68 Theory of human agencies 71 Farming without irrigation 77 CHAPTER V. CERTAIN IMPORTANT QUESTIONS RELATING TO IRRIGABLE LANDS: The unit of water used in irrigation 81 The quantitative value of water in irrigation 81 Area of irrigable land sometimes not limited by water supply 85 Method of determining the supply of water 85 Methods of determining the extent of irrigable land unlimited by water supply 86 The selection of irrigable lands 87 Increase in the water supply 89 CHAPTER VI. THE LANDS OF UTAH: Physical features 93 Timber 98 Irrigable and pasturage lands 103 Uinta-White Basin 103 The Cañon Lands 105 The Sevier Lake District 106