Reservoirs, 12, 13, 85, 144 River, Bear. (_See_ Bear River.) Colorado. (_See_ Colorado River.) Duchesne. (_See_ Duchesne River.) Escalante. (_See_ Escalante River.) Fremont. (_See_ Fremont River.) Grand. (_See_ Grand River.) Green. (_See_ Green River.) Gunnison. (_See_ Gunnison River.) Jordan. (_See_ Jordan River.) Ogden. (_See_ Ogden River.) Paria. (_See_ Paria River.) Price. (_See_ Price River.) Provo. (_See_ Provo River.) San Rafael. (_See_ San Rafael River.) Sevier. (_See_ Sevier River.) Uinta. (_See_ Uinta River.) Virgin. (_See_ Virgin River.) Weber. (_See_ Weber River.) White. (_See_ White River.) Rivers, Land grants in aid of improvement of, 169 Rockwood, Hon. A. P., 113 San Francisco Region, Mean temperature, by seasons, of the, 54 Precipitation of the, 49 Rainy season of the, 54 Seasonal precipitation in the, 53 San Pete Valley, Amount of irrigable land in the, 138 Flow of the streams of the, 138 San Rafael River, Irrigable lands of the, 158, 159 Tributaries of the, 158 San Rafael River, Volume of flow of the, 159 Schott, Mr. Charles A., 46, 69 Seasonal precipitation and temperatures on the Pacific coast, 55 in Arizona and New Mexico, 56 Seasonal precipitation in the Region of the Plains, 52 San Francisco Region, 53 Selection of irrigable lands, 87 Sevier Lake Basin, 94 District, 94 Altitudes in the, 133 Amount of irrigable land in the, 106, 143 Climate of the, 131 Description of the, 106 Irrigable lands of the, 134 Physical characteristics of the, 130 Rainfall of the, 131 Rain gauge records of the, 131 River, Course of the, 129 Volume of flow of the, 139, 140 Irrigable lands of the valley of the, 128 Valley of the, 129 Sierra La Sal, 105 Sioux City and Pacific Railroad Company, Land grants to the, 177 Smithsonian Tables of Precipitation, 46, 69 Soil and subsoil, Complicating conditions of, 83 Conditions of, 82 Soils, 145 Southern Pacific Railroad Company, Land grants to the, 179 Springs, Opening out of, 74 Use of, in irrigation, 9 Stansbury, Captain Howard, 64, 65, 66 Island, 67 bar, 64, 67 Streams, Descent of, 88 flowing into Great Salt Lake, 72 Flow of, at different periods, 13 Increase in the volume of, 57 Measurement of, 86, 115 of San Pete Valley, Volume of flow of the, 140 of Utah, Fluctuations of the, 115 Practical capacity of, 85 small, Employment of, in irrigation, 7, 11, 12 Strong’s Knob, 67 Sub-humid Region, Boundaries of the, 3 destitute of forests, 4 Mean precipitation of the, 47 Rainfall of the, 4 Supply of water, Method of determining the, 85, 86