LIST OF ILLUSTRATIONS xxiii 



FIG. Page 



75. Loading sugar beets in factory bins 288 



76. Irrigating potatoes 293 



77. Yield vs. water (sugar beets) 295 



78. Plan of potato irrigation 298 



79. Irrigating potatoes 299 



80. Irrigated field peas 302 



81. Irrigated celery 304 



82. Irrigated pumpkins 305 



83. Irrigated onions 307 



84. Yield vs. water (potatoes) 309 



8c. Irrigated Egyptian cotton 311 



86. Irrigating cantaloupes 312 



87. Irrigating an apple orchard , 318 



88. On the upper canal 322 



89. An irrigated prune orchard . . 325 



90. An irrigated date palm orchard 328 



91. Canal crossing river in an inverted syphon 332 



92. Looking down the Bear River Canal 333 



93. Lateral outtake from large canal 335 



94. Headgate of a canal 340 



95. A cable measuring station with automatic gauge 348 



96. Lyman rectangular weir 350 



97. Longitudinal section of Lyman's weir 351 



98. Cippoletti weir 353 



99. Details of Cippoletti weir 354 



100. Scale to be screwed on side of Cippoletti weir 355 



101. Divisor attached to Cippoletti weir 356 



102. Turnout and measuring weir 357 



103. Device for diverting a constant quantity of water 357 



104. The need of storing water in reservoirs 359 



105. Rise of ground water from irrigation 374 



106. Chain puddler. Used in making canals watertight 376 



107. Modified chain puddler 377 



108. \\ ooden stave pipe carrying irrigation water 378 



109. Lateral lined with concrete . s 379 



1 10. Cement-lined main canal 380 



111. Pumping plant 382 



112. Drainage of irrigated lands by intercepting drains 383 



113. Structure of an alkali spot 386 



114. Quaternary Lakes of the Great Basin. Sources of alkali deposits. 389 



115. Effect of a strong solution of potassium nitrate on protoplasm. 392 



1 16. Vegetation on alkali lands 393 



117. Alkali rising in spots on irrigated pasture 396 



